/*
--------------------------  pmpd2d  ---------------------------------------- 
     
      
 pmpd = physical modeling for pure data                                     
 Written by Cyrille Henry (ch@chnry.net)
 
 Get sources on pd svn on sourceforge.

 This program is free software; you can redistribute it and/or                
 modify it under the terms of the GNU General Public License                  
 as published by the Free Software Foundation; either version 2               
 of the License, or (at your option) any later version.                       
                                                                             
 This program is distributed in the hope that it will be useful,              
 but WITHOUT ANY WARRANTY; without even the implied warranty of               
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the                
 GNU General Public License for more details.                           
                                                                              
 You should have received a copy of the GNU General Public License           
 along with this program.  If not, see <http://www.gnu.org/licenses/>.
                                                                              
 Based on PureData by Miller Puckette and others.                             
                                                                             

----------------------------------------------------------------------------
*/

#include "m_pd.h"
#include "stdio.h"
#include "math.h"

#define nb_max_link   100000 
#define nb_max_mass   100000

#define max(a,b) ( ((a) > (b)) ? (a) : (b) ) 
#define min(a,b) ( ((a) < (b)) ? (a) : (b) ) 

t_float sign_ch(t_float v)
{
    return v > 0 ? 1 : -1;
}

t_float sqr(t_float x)
{
    return x*x ;
}

t_float pow_ch(t_float x, t_float y)
{
    return x > 0 ? pow(x,y) : -pow(-x,y);
}
    
static t_class *pmpd2d_class;

typedef struct _mass {
    t_symbol *Id;
    int mobile;
    t_float invM;
    t_float speedX;
    t_float speedY;
    t_float posX;
    t_float posY;
    t_float forceX;
    t_float forceY;
    t_float D2;
    t_float D2offset;
    int num;
} foo;

typedef struct _link {
    t_symbol *Id;
    int lType;
    struct _mass *mass1;
    struct _mass *mass2;
    t_float K;
    t_float D;
    t_float L;
    t_float Pow;
    t_float Lmin;
    t_float Lmax;
    t_float distance;
    t_float VX; // vecteur portant la liaison, si c'est le cas
    t_float VY;
    t_symbol *arrayK;
    t_symbol *arrayD;
    t_float K_L; // longeur du tabeau K
    t_float D_L; // longeur du tabeau D
} foo1 ;

typedef struct _pmpd2d {
     t_object  x_obj;
    struct _link link[nb_max_link];
    struct _mass mass[nb_max_mass];
    t_outlet *main_outlet;
    t_outlet *info_outlet;
    int nb_link;
    int nb_mass;
    t_float minX, maxX, minY, maxY;
    t_int grab; // si on grab une mass ou pas
    t_int grab_nb; // la masse grabé
} t_pmpd2d;

t_float tabread2(t_pmpd2d *x, t_float pos, t_symbol *array)
{
    t_garray *a;
    int npoints;
    t_word *vec;
    t_float posx;
    
    if (!(a = (t_garray *)pd_findbyclass(array, garray_class)))
        pd_error(x, "%s: no such array", array->s_name);
    else if (!garray_getfloatwords(a, &npoints, &vec))
        pd_error(x, "%s: bad template for tabLink", array->s_name);
    else
    {
        posx = fabs(pos)*npoints;
        int n=posx;
        if (n >= npoints - 1) 
            return (sign_ch(pos)*vec[npoints-1].w_float);
        float fract = posx-n;
        return (sign_ch(pos) * ( fract*vec[n+1].w_float+(1-fract)*vec[n].w_float));
    }
    return( pos); // si il y a un pb sur le tableau, on renvoie l'identité
}

void pmpd2d_reset(t_pmpd2d *x)
{
    x->nb_link = 0;
    x->nb_mass = 0;
    x->minX = -1000000;
    x->maxX = 1000000;
    x->minY = -1000000;
    x->maxY = 1000000;
    x->grab = 0;
}

void pmpd2d_infosL(t_pmpd2d *x)
{
    int i;
    post("list of mass");
    post("number, Id, mobile, mass, damping, positionX Y, speedX Y, forcesX Y");
    for(i=0; i < x->nb_mass; i++)
    {
        post("masse %i: %s, %d, %f, %f, %f, %f, %f, %f, %f, %f",i, x->mass[i].Id->s_name, \
            x->mass[i].mobile, 1/x->mass[i].invM, x->mass[i].D2, x->mass[i].posX, x->mass[i].posY, \
            x->mass[i].speedX, x->mass[i].speedY, x->mass[i].forceX, x->mass[i].forceY );
    }

    post("list of link");
    post("number, Id, mass1, mass2, K, D, Pow, L, Lmin, Lmax");
    for(i=0; i < x->nb_link; i++)
    {
        switch(x->link[i].lType)
        {
        case 0 :
            post("link %i: %s, %i, %i, %f, %f, %f, %f, %f, %f", i, x->link[i].Id->s_name, \
                x->link[i].mass1->num, x->link[i].mass2->num, x->link[i].K, x->link[i].D, \
                x->link[i].Pow, x->link[i].L, x->link[i].Lmin, x->link[i].Lmax);
            break;
        case 1 :
            post("tLink %i: %s, %i, %i, %f, %f, %f, %f, %f, %f, %f, %f", i, x->link[i].Id->s_name, \
                x->link[i].mass1->num, x->link[i].mass2->num, x->link[i].K, x->link[i].D, \
                x->link[i].Pow, x->link[i].L, x->link[i].Lmin, x->link[i].Lmax, x->link[i].VX, x->link[i].VY);
            break;
        case 2 :
            post("tabLink %i: %s, %i, %i, %f, %f, %s, %f, %s, %f", i, x->link[i].Id->s_name, \
                x->link[i].mass1->num, x->link[i].mass2->num, x->link[i].K, x->link[i].D, \
                x->link[i].arrayK->s_name, x->link[i].K_L, x->link[i].arrayD->s_name, x->link[i].D_L);
            break;
        }
    }
}

void pmpd2d_bang(t_pmpd2d *x)
{
// this part is doing all the PM
    t_float F, L, Lx,Ly, Fx, Fy, tmpX, tmpY,speed;
    t_int i;
    // post("bang");

    for (i=0; i<x->nb_mass; i++)
    // compute new masses position
        if (x->mass[i].mobile > 0) // only if mobile
        {
            x->mass[i].speedX += x->mass[i].forceX * x->mass[i].invM;
            x->mass[i].speedY += x->mass[i].forceY * x->mass[i].invM;
            // x->mass[i].forceX = 0;
            // x->mass[i].forceY = 0;        
            x->mass[i].posX += x->mass[i].speedX ;
            x->mass[i].posY += x->mass[i].speedY ;
            if ( (x->mass[i].posX < x->minX) || (x->mass[i].posX > x->maxX) || (x->mass[i].posY < x->minY) || (x->mass[i].posY > x->maxY) ) 
            {
                tmpX = min(x->maxX,max(x->minX,x->mass[i].posX));
                tmpY = min(x->maxY,max(x->minY,x->mass[i].posY));
                x->mass[i].speedX -= x->mass[i].posX - tmpX;
                x->mass[i].speedY -= x->mass[i].posY - tmpY;
                x->mass[i].posX = tmpX;
                x->mass[i].posY = tmpY;
            }
            x->mass[i].forceX = -x->mass[i].D2 * x->mass[i].speedX;
            x->mass[i].forceY = -x->mass[i].D2 * x->mass[i].speedY;
            speed = sqrt(x->mass[i].speedX * x->mass[i].speedX + x->mass[i].speedY * x->mass[i].speedY);
            if (speed != 0) {
                x->mass[i].forceX += x->mass[i].D2offset * (x->mass[i].speedX/speed);
                x->mass[i].forceY += x->mass[i].D2offset * (x->mass[i].speedY/speed);
            }
        }

    for (i=0; i<x->nb_link; i++)
    // compute link forces
    {
        Lx = x->link[i].mass1->posX - x->link[i].mass2->posX;
        Ly = x->link[i].mass1->posY - x->link[i].mass2->posY;
        L = sqrt( sqr(Lx) + sqr(Ly) );
        
        if ( (L >= x->link[i].Lmin) && (L < x->link[i].Lmax)  && (L != 0))
        {
            if (x->link[i].lType == 2)
            { // K et D viennent d'une table
                F  = x->link[i].D * tabread2(x, (L - x->link[i].distance) / x->link[i].D_L, x->link[i].arrayD);
                F += x->link[i].K * tabread2(x, L / x->link[i].K_L, x->link[i].arrayK);
            }
            else
            {            
                F  = x->link[i].D * (L - x->link[i].distance) ;
                F += x->link[i].K *  pow_ch( L - x->link[i].L, x->link[i].Pow);
            }

            Fx = F * Lx/L;
            Fy = F * Ly/L;    
                
            if (x->link[i].lType == 1)
            { // on projette selon 1 axe
                // F = Fx*x->link[i].VX + Fy*x->link[i].VY; // produit scalaire de la force sur le vecteur qui la porte
                Fx = Fx*x->link[i].VX; // V est unitaire, dc on projete sans pb
                Fy = Fy*x->link[i].VY;                
            }
            
            x->link[i].mass1->forceX -= Fx;
            x->link[i].mass1->forceY -= Fy;
            x->link[i].mass2->forceX += Fx;
            x->link[i].mass2->forceY += Fy;
        }
        x->link[i].distance=L;
    }
}

void pmpd2d_mass(t_pmpd2d *x, t_symbol *Id, t_float mobile, t_float M, t_float posX, t_float posY )
{ // add a mass : Id, invM speedX posX

    if (M<=0) M=1;
    x->mass[x->nb_mass].Id = Id;
    x->mass[x->nb_mass].mobile = (int)mobile;
    x->mass[x->nb_mass].invM = 1/M;
    x->mass[x->nb_mass].speedX = 0;
    x->mass[x->nb_mass].speedY = 0;
    x->mass[x->nb_mass].posX = posX;
    x->mass[x->nb_mass].posY = posY;
    x->mass[x->nb_mass].forceX = 0;
    x->mass[x->nb_mass].forceY = 0;
    x->mass[x->nb_mass].num = x->nb_mass;
    x->mass[x->nb_mass].D2 = 0;
    x->mass[x->nb_mass].D2offset = 0;

    x->nb_mass++ ;
    x->nb_mass = min ( nb_max_mass -1, x->nb_mass );
}

void pmpd2d_create_link(t_pmpd2d *x, t_symbol *Id, int mass1, int mass2, t_float K, t_float D, t_float Pow, t_float Lmin, t_float Lmax, t_int type)
{ // create a link based on mass number

    if ((x->nb_mass>1) && (mass1 != mass2) && (mass1 >= 0) && (mass2 >= 0) && (mass1 < x->nb_mass) && (mass2 < x->nb_mass) )
    {
        x->link[x->nb_link].lType = type;
        x->link[x->nb_link].Id = Id;
        x->link[x->nb_link].mass1 = &x->mass[mass1]; 
        x->link[x->nb_link].mass2 = &x->mass[mass2];
        x->link[x->nb_link].K = K;
        x->link[x->nb_link].D = D;
        x->link[x->nb_link].L = sqrt(sqr(x->mass[mass1].posX - x->mass[mass2].posX) + sqr(x->mass[mass1].posY - x->mass[mass2].posY));
        x->link[x->nb_link].Pow = Pow;
        x->link[x->nb_link].Lmin = Lmin;
        x->link[x->nb_link].Lmax = Lmax;
        x->link[x->nb_link].distance = x->link[x->nb_link].L ;

        x->nb_link++ ;
        x->nb_link = min ( nb_max_link -1, x->nb_link );
    }
}

void pmpd2d_link(t_pmpd2d *x, t_symbol *s, int argc, t_atom *argv)
{ // add a link : Id, *mass1, *mass2, K, D, Pow, Lmin, Lmax;

    int i, j;

    t_symbol *Id = atom_getsymbolarg(0,argc,argv);
    int mass1 = atom_getfloatarg(1, argc, argv);
    int mass2 = atom_getfloatarg(2, argc, argv);
    t_float K = atom_getfloatarg(3, argc, argv);
    t_float D = atom_getfloatarg(4, argc, argv);
    t_float Pow = 1; 
    if (argc > 5) Pow = atom_getfloatarg(5, argc, argv);
    t_float Lmin = -1000000;
    if (argc > 6) Lmin = atom_getfloatarg(6, argc, argv);
    t_float Lmax =  1000000;
    if (argc > 7) Lmax = atom_getfloatarg(7, argc, argv);
//    post("%d,%d, %f,%f", mass1, mass2, K, D);

    if ( ( argv[1].a_type == A_FLOAT ) && ( argv[2].a_type == A_FLOAT ) )
    {
        pmpd2d_create_link(x, Id, mass1, mass2, K, D, Pow, Lmin, Lmax, 0);
    }
    else
    if ( ( argv[1].a_type == A_SYMBOL ) && ( argv[2].a_type == A_FLOAT ) )
    {
        for (i=0; i< x->nb_mass; i++)
        {
            if ( atom_getsymbolarg(1,argc,argv) == x->mass[i].Id)
            {
                pmpd2d_create_link(x, Id, i, mass2, K, D, Pow, Lmin, Lmax, 0);
            }
        }
    }
    else
    if ( ( argv[1].a_type == A_FLOAT ) && ( argv[2].a_type == A_SYMBOL ) )
    {
        for (i=0; i< x->nb_mass; i++)
        {
            if ( atom_getsymbolarg(2,argc,argv) == x->mass[i].Id)
            {
                pmpd2d_create_link(x, Id, mass1, i, K, D, Pow, Lmin, Lmax, 0);
            }
        }
    }
    else
    if ( ( argv[1].a_type == A_SYMBOL ) && ( argv[2].a_type == A_SYMBOL ) )
    {
        for (i=0; i < x->nb_mass; i++)
        {
            for (j=0; j < x->nb_mass; j++)
            {
                if ( (atom_getsymbolarg(1,argc,argv) == x->mass[i].Id)&&(atom_getsymbolarg(2,argc,argv) == x->mass[j].Id))
                {
                    if (!( (x->mass[i].Id == x->mass[j].Id) && (i>j) )) 
                        // si lien entre 2 serie de masses identique entres elle, alors on ne creer qu'un lien sur 2, pour evider les redondances
                        pmpd2d_create_link(x, Id, i, j, K, D, Pow, Lmin, Lmax, 0);
                }
            }   
        }
    }
}

void pmpd2d_tLink(t_pmpd2d *x, t_symbol *s, int argc, t_atom *argv)
{ // add a link : Id, *mass1, *mass2, K, D, Vx, Vy, Pow, Lmin, Lmax;

    int i, j;
    
    t_symbol *Id = atom_getsymbolarg(0,argc,argv);
    int mass1 = atom_getfloatarg(1, argc, argv);
    int mass2 = atom_getfloatarg(2, argc, argv);
    t_float K = atom_getfloatarg(3, argc, argv);
    t_float D = atom_getfloatarg(4, argc, argv);
    t_float vecteurX = atom_getfloatarg(5, argc, argv);
    t_float vecteurY = atom_getfloatarg(6, argc, argv);
    t_float vecteur = sqrt( sqr(vecteurX) + sqr(vecteurY) );
    vecteurX /= vecteur;
    vecteurY /= vecteur;
    t_float Pow = 1; 
    if (argc > 7) Pow = atom_getfloatarg(7, argc, argv);
    t_float Lmin = 0;
    if (argc > 8) Lmin = atom_getfloatarg(8, argc, argv);
    t_float Lmax =  1000000;
    if (argc > 9) Lmax = atom_getfloatarg(9, argc, argv);

    if ( ( argv[1].a_type == A_FLOAT ) && ( argv[2].a_type == A_FLOAT ) )
    {
        pmpd2d_create_link(x, Id, mass1, mass2, K, D, Pow, Lmin, Lmax, 1);
        x->link[x->nb_link-1].VX = vecteurX;
        x->link[x->nb_link-1].VY = vecteurY;
    }
    else
    if ( ( argv[1].a_type == A_SYMBOL ) && ( argv[2].a_type == A_FLOAT ) )
    {
        for (i=0; i< x->nb_mass; i++)
        {
            if ( atom_getsymbolarg(1,argc,argv) == x->mass[i].Id)
            {
                pmpd2d_create_link(x, Id, i, mass2, K, D, Pow, Lmin, Lmax, 1);
                x->link[x->nb_link-1].VX = vecteurX;
                x->link[x->nb_link-1].VY = vecteurY;
            }
        }
    }
    else
    if ( ( argv[1].a_type == A_FLOAT ) && ( argv[2].a_type == A_SYMBOL ) )
    {
        for (i=0; i< x->nb_mass; i++)
        {
            if ( atom_getsymbolarg(2,argc,argv) == x->mass[i].Id)
            {
                pmpd2d_create_link(x, Id, mass1, i, K, D, Pow, Lmin, Lmax, 1);
                x->link[x->nb_link-1].VX = vecteurX;
                x->link[x->nb_link-1].VY = vecteurY;
            }
        }
    }
    else
    if ( ( argv[1].a_type == A_SYMBOL ) && ( argv[2].a_type == A_SYMBOL ) )
    {
        for (i=0; i< x->nb_mass; i++)
        {
            for (j=0; j< x->nb_mass; j++)
            {
                if ( (atom_getsymbolarg(1,argc,argv) == x->mass[i].Id)&(atom_getsymbolarg(2,argc,argv) == x->mass[j].Id))
                {
                    if (!( (x->mass[i].Id == x->mass[j].Id) && (i>j) )) 
                        // si lien entre 2 serie de masses identique entres elle, alors on ne creer qu'un lien sur 2, pour evider les redondances
                    {
                        pmpd2d_create_link(x, Id, i, j, K, D, Pow, Lmin, Lmax, 1);
                        x->link[x->nb_link-1].VX = vecteurX;
                        x->link[x->nb_link-1].VY = vecteurY;
                    }

                }
            }   
        }
    }
}

void pmpd2d_tabLink(t_pmpd2d *x, t_symbol *s, int argc, t_atom *argv)
{
    int i, j;
    
    t_symbol *Id = atom_getsymbolarg(0,argc,argv);
    int mass1 = atom_getfloatarg(1, argc, argv);
    int mass2 = atom_getfloatarg(2, argc, argv);
    t_symbol *arrayK = atom_getsymbolarg(3,argc,argv);
    t_float Kl = atom_getfloatarg(4, argc, argv);
       if (Kl <= 0) Kl = 1;
    t_symbol *arrayD = atom_getsymbolarg(5,argc,argv);    
    t_float Dl = atom_getfloatarg(6, argc, argv);
    if (Dl <= 0) Dl = 1;

    if ( ( argv[1].a_type == A_FLOAT ) && ( argv[2].a_type == A_FLOAT ) )
    {
        pmpd2d_create_link(x, Id, mass1, mass2, 1, 1, 1, 0, 1000000, 2);
        x->link[x->nb_link-1].arrayK = arrayK;
        x->link[x->nb_link-1].arrayD = arrayD;
        x->link[x->nb_link-1].K_L = Kl;
        x->link[x->nb_link-1].D_L = Dl;    
    }
    else
    if ( ( argv[1].a_type == A_SYMBOL ) && ( argv[2].a_type == A_FLOAT ) )
    {
        for (i=0; i< x->nb_mass; i++)
        {
            if ( atom_getsymbolarg(1,argc,argv) == x->mass[i].Id)
            {
                pmpd2d_create_link(x, Id, i, mass2, 1, 1, 1, 0, 1000000, 2);
                x->link[x->nb_link-1].arrayK = arrayK;
                x->link[x->nb_link-1].arrayD = arrayD;
                x->link[x->nb_link-1].K_L = Kl;
                x->link[x->nb_link-1].D_L = Dl;    
            }
        }
    }
    else
    if ( ( argv[1].a_type == A_FLOAT ) && ( argv[2].a_type == A_SYMBOL ) )
    {
        for (i=0; i< x->nb_mass; i++)
        {
            if ( atom_getsymbolarg(2,argc,argv) == x->mass[i].Id)
            {
                pmpd2d_create_link(x, Id, mass1, i, 1, 1, 1, 0, 1000000, 2);
                x->link[x->nb_link-1].arrayK = arrayK;
                x->link[x->nb_link-1].arrayD = arrayD;
                x->link[x->nb_link-1].K_L = Kl;
                x->link[x->nb_link-1].D_L = Dl;    
            }
        }
    }
    else
    if ( ( argv[1].a_type == A_SYMBOL ) && ( argv[2].a_type == A_SYMBOL ) )
    {
        for (i=0; i< x->nb_mass; i++)
        {
            for (j=0; j< x->nb_mass; j++)
            {
                if ( (atom_getsymbolarg(1,argc,argv) == x->mass[i].Id)&(atom_getsymbolarg(2,argc,argv) == x->mass[j].Id))
                {
                    if (!( (x->mass[i].Id == x->mass[j].Id) && (i>j) )) 
                        // si lien entre 2 serie de masses identique entres elle, alors on ne creer qu'un lien sur 2, pour evider les redondances
                    {
                        pmpd2d_create_link(x, Id, i, j, 1, 1, 1, 0, 1000000, 2);
                        x->link[x->nb_link-1].arrayK = arrayK;
                        x->link[x->nb_link-1].arrayD = arrayD;
                        x->link[x->nb_link-1].K_L = Kl;
                        x->link[x->nb_link-1].D_L = Dl;    
                    }
                }
            }   
        }
    }

}

void pmpd2d_setK(t_pmpd2d *x, t_symbol *s, int argc, t_atom *argv)
{
    int tmp, i;

    if ( ( argv[0].a_type == A_FLOAT ) && ( argv[1].a_type == A_FLOAT ) )
    {
        tmp = atom_getfloatarg(0, argc, argv);
        tmp = max(0, min( x->nb_link-1, tmp));
        x->link[tmp].K = atom_getfloatarg(1, argc, argv);
    }
    if ( ( argv[0].a_type == A_SYMBOL ) && ( argv[1].a_type == A_FLOAT ) )
    {
        for (i=0; i< x->nb_link; i++)
        {
            if ( atom_getsymbolarg(0,argc,argv) == x->link[i].Id)
            {
                x->link[i].K = atom_getfloatarg(1, argc, argv);
            }
        }
    }
}

void pmpd2d_setD(t_pmpd2d *x, t_symbol *s, int argc, t_atom *argv)
{
    int tmp, i;

    if ( ( argv[0].a_type == A_FLOAT ) && ( argv[1].a_type == A_FLOAT ) )
    {
        tmp = atom_getfloatarg(0, argc, argv);
        tmp = max(0, min( x->nb_link-1, tmp));
        x->link[tmp].D = atom_getfloatarg(1, argc, argv);
    }
    if ( ( argv[0].a_type == A_SYMBOL ) && ( argv[1].a_type == A_FLOAT ) )
    {
        for (i=0; i< x->nb_link; i++)
        {
            if ( atom_getsymbolarg(0,argc,argv) == x->link[i].Id)
            {
                x->link[i].D = atom_getfloatarg(1, argc, argv);
            }
        }
    }
}

void pmpd2d_setL(t_pmpd2d *x, t_symbol *s, int argc, t_atom *argv)
{
    int tmp, i;

    if ( ( argv[0].a_type == A_FLOAT ) && ( argv[1].a_type == A_FLOAT ) )
    {
        tmp = atom_getfloatarg(0, argc, argv);
        tmp = max(0, min( x->nb_link-1, tmp));
        x->link[tmp].L = atom_getfloatarg(1, argc, argv);
    }
    if ( ( argv[0].a_type == A_SYMBOL ) && ( argv[1].a_type == A_FLOAT ) )
    {
        for (i=0; i< x->nb_link; i++)
        {
            if ( atom_getsymbolarg(0,argc,argv) == x->link[i].Id)
            {
                x->link[i].L = atom_getfloatarg(1, argc, argv);
            }
        }
    }
    if ( ( argv[0].a_type == A_FLOAT ) && ( argc == 1 ) )
    {
        tmp = atom_getfloatarg(0, argc, argv);
        tmp = max(0, min( x->nb_link-1, tmp));
        x->link[tmp].L = x->link[tmp].mass2->posX - x->link[tmp].mass1->posX;
    }
    if ( ( argv[0].a_type == A_SYMBOL ) && ( argc == 1 ) )
    {
        for (i=0; i< x->nb_link; i++)
        {
            if ( atom_getsymbolarg(0,argc,argv) == x->link[i].Id)
            {
                x->link[i].L = x->link[i].mass2->posX - x->link[i].mass1->posX;
            }
        }
    }
}

void pmpd2d_setLKTab(t_pmpd2d *x, t_symbol *s, int argc, t_atom *argv)
{
    int tmp, i;
    t_float K_l = atom_getfloatarg(1, argc, argv);
    if (K_l <=  0) K_l = 1;
    if ( ( argv[0].a_type == A_FLOAT ) && ( argv[1].a_type == A_FLOAT ) )
    {
        tmp = atom_getfloatarg(0, argc, argv);
        tmp = max(0, min( x->nb_link-1, tmp));
        x->link[tmp].K_L = K_l;
    }
    if ( ( argv[0].a_type == A_SYMBOL ) && ( argv[1].a_type == A_FLOAT ) )
    {
        for (i=0; i< x->nb_link; i++)
        {
            if ( atom_getsymbolarg(0,argc,argv) == x->link[i].Id)
            {
                x->link[i].K_L = K_l;
            }
        }
    }
}

void pmpd2d_setLDTab(t_pmpd2d *x, t_symbol *s, int argc, t_atom *argv)
{
    int tmp, i;
    t_float D_l = atom_getfloatarg(1, argc, argv);
    if (D_l <=  0) D_l = 1;
    if ( ( argv[0].a_type == A_FLOAT ) && ( argv[1].a_type == A_FLOAT ) )
    {
        tmp = atom_getfloatarg(0, argc, argv);
        tmp = max(0, min( x->nb_link-1, tmp));
        x->link[tmp].D_L = D_l;
    }
    if ( ( argv[0].a_type == A_SYMBOL ) && ( argv[1].a_type == A_FLOAT ) )
    {
        for (i=0; i< x->nb_link; i++)
        {
            if ( atom_getsymbolarg(0,argc,argv) == x->link[i].Id)
            {
                x->link[i].D_L = D_l;
            }
        }
    }
}

void pmpd2d_setLinkId(t_pmpd2d *x, t_symbol *s, int argc, t_atom *argv)
{
    int tmp, i;

    if ( ( argv[0].a_type == A_FLOAT ) && ( argv[1].a_type == A_SYMBOL ) )
    {
        tmp = atom_getfloatarg(0, argc, argv);
        tmp = max(0, min( x->nb_link-1, tmp));
        x->link[tmp].Id = atom_getsymbolarg(1, argc, argv);
    }
    if ( ( argv[0].a_type == A_SYMBOL ) && ( argv[1].a_type == A_SYMBOL ) )
    {
        for (i=0; i< x->nb_link; i++)
        {
            if ( atom_getsymbolarg(0,argc,argv) == x->link[i].Id)
            {
                x->link[i].Id = atom_getsymbolarg(1, argc, argv);
            }
        }
    }
}

void pmpd2d_setMassId(t_pmpd2d *x, t_symbol *s, int argc, t_atom *argv)
{
    int tmp, i;

    if ( ( argv[0].a_type == A_FLOAT ) && ( argv[1].a_type == A_SYMBOL ) )
    {
        tmp = atom_getfloatarg(0, argc, argv);
        tmp = max(0, min( x->nb_mass-1, tmp));
        x->mass[tmp].Id = atom_getsymbolarg(1, argc, argv);
    }
    if ( ( argv[0].a_type == A_SYMBOL ) && ( argv[1].a_type == A_SYMBOL ) )
    {
        for (i=0; i< x->nb_mass; i++)
        {
            if ( atom_getsymbolarg(0,argc,argv) == x->mass[i].Id)
            {
                x->mass[i].Id = atom_getsymbolarg(1, argc, argv);
            }
        }
    }
}

void pmpd2d_forceX(t_pmpd2d *x, t_symbol *s, int argc, t_atom *argv)
{
// add a force to a specific mass
    int tmp, i;

    if ( ( argv[0].a_type == A_FLOAT ) && ( argv[1].a_type == A_FLOAT ) )
    {
        tmp = atom_getfloatarg(0, argc, argv);
        tmp = max(0, min( x->nb_mass-1, tmp));
        x->mass[tmp].forceX += atom_getfloatarg(1, argc, argv);
    }
    if ( ( argv[0].a_type == A_SYMBOL ) && ( argv[1].a_type == A_FLOAT ) )
    {
        for (i=0; i< x->nb_mass; i++)
        {
            if ( atom_getsymbolarg(0,argc,argv) == x->mass[i].Id)
            {
                x->mass[i].forceX += atom_getfloatarg(1, argc, argv);
            }
        }
    }
}

void pmpd2d_forceY(t_pmpd2d *x, t_symbol *s, int argc, t_atom *argv)
{
// add a force to a specific mass
    int tmp, i;

    if ( ( argv[0].a_type == A_FLOAT ) && ( argv[1].a_type == A_FLOAT ) )
    {
        tmp = atom_getfloatarg(0, argc, argv);
        tmp = max(0, min( x->nb_mass-1, tmp));
        x->mass[tmp].forceY += atom_getfloatarg(1, argc, argv);
    }
    if ( ( argv[0].a_type == A_SYMBOL ) && ( argv[1].a_type == A_FLOAT ) )
    {
        for (i=0; i< x->nb_mass; i++)
        {
            if ( atom_getsymbolarg(0,argc,argv) == x->mass[i].Id)
            {
                x->mass[i].forceY += atom_getfloatarg(1, argc, argv);
            }
        }
    }
}

void pmpd2d_force(t_pmpd2d *x, t_symbol *s, int argc, t_atom *argv)
{
// add a force to a specific mass
    int tmp, i;

    if ( ( argv[0].a_type == A_FLOAT ) && ( argv[1].a_type == A_FLOAT ) && ( argv[2].a_type == A_FLOAT ) )
    {
        tmp = atom_getfloatarg(0, argc, argv);
        tmp = max(0, min( x->nb_mass-1, tmp));
        x->mass[tmp].forceX += atom_getfloatarg(1, argc, argv);
        x->mass[tmp].forceY += atom_getfloatarg(2, argc, argv);
    }
    if ( ( argv[0].a_type == A_SYMBOL ) && ( argv[1].a_type == A_FLOAT ) && ( argv[2].a_type == A_FLOAT ) )
    {
        for (i=0; i< x->nb_mass; i++)
        {
            if ( atom_getsymbolarg(0,argc,argv) == x->mass[i].Id)
            {
                x->mass[i].forceX += atom_getfloatarg(1, argc, argv);
                x->mass[i].forceY += atom_getfloatarg(2, argc, argv);
            }
        }
    }
}

void pmpd2d_posX(t_pmpd2d *x, t_symbol *s, int argc, t_atom *argv)
{
// displace a mass to a certain position
    int tmp, i;

    if ( ( argv[0].a_type == A_FLOAT ) && ( argv[1].a_type == A_FLOAT ) )
    {
        tmp = atom_getfloatarg(0, argc, argv);
        tmp = max(0, min( x->nb_mass-1, tmp));
        x->mass[tmp].posX = atom_getfloatarg(1, argc, argv);
           x->mass[tmp].speedX = 0; 
        x->mass[tmp].forceX = 0; 
        
    }
    if ( ( argv[0].a_type == A_SYMBOL ) && ( argv[1].a_type == A_FLOAT ) )
    {
        for (i=0; i< x->nb_mass; i++)
        {
            if ( atom_getsymbolarg(0,argc,argv) == x->mass[i].Id)
            {
                x->mass[i].posX = atom_getfloatarg(1, argc, argv);
                x->mass[i].speedX = 0; 
                x->mass[i].forceX = 0;

            }
        }
    }
}

void pmpd2d_posY(t_pmpd2d *x, t_symbol *s, int argc, t_atom *argv)
{
// displace a mass to a certain position
    int tmp, i;

    if ( ( argv[0].a_type == A_FLOAT ) && ( argv[1].a_type == A_FLOAT ) )
    {
        tmp = atom_getfloatarg(0, argc, argv);
        tmp = max(0, min( x->nb_mass-1, tmp));
        x->mass[tmp].posY = atom_getfloatarg(1, argc, argv);
           x->mass[tmp].speedY = 0; 
        x->mass[tmp].forceY = 0; 
        
    }
    if ( ( argv[0].a_type == A_SYMBOL ) && ( argv[1].a_type == A_FLOAT ) )
    {
        for (i=0; i< x->nb_mass; i++)
        {
            if ( atom_getsymbolarg(0,argc,argv) == x->mass[i].Id)
            {
                x->mass[i].posY = atom_getfloatarg(1, argc, argv);
                x->mass[i].speedY = 0; 
                x->mass[i].forceY = 0;
            }
        }
    }
}

void pmpd2d_pos(t_pmpd2d *x, t_symbol *s, int argc, t_atom *argv)
{
// displace a mass to a certain position
    int tmp, i;

    if ( ( argv[0].a_type == A_FLOAT ) && ( argv[1].a_type == A_FLOAT ) && ( argv[2].a_type == A_FLOAT ) )
    {
        tmp = atom_getfloatarg(0, argc, argv);
        tmp = max(0, min( x->nb_mass-1, tmp));
        x->mass[tmp].posX = atom_getfloatarg(1, argc, argv);
           x->mass[tmp].speedX = 0; 
        x->mass[tmp].forceX = 0; 
           x->mass[tmp].posY = atom_getfloatarg(2, argc, argv);
           x->mass[tmp].speedY = 0; 
        x->mass[tmp].forceY = 0; 
        
    }
    if ( ( argv[0].a_type == A_SYMBOL ) && ( argv[1].a_type == A_FLOAT ) && ( argv[2].a_type == A_FLOAT ) )
    {
        for (i=0; i< x->nb_mass; i++)
        {
            if ( atom_getsymbolarg(0,argc,argv) == x->mass[i].Id)
            {
                x->mass[i].posX = atom_getfloatarg(1, argc, argv);
                x->mass[i].speedX = 0; 
                x->mass[i].forceX = 0;
                x->mass[i].posY = atom_getfloatarg(2, argc, argv);
                x->mass[i].speedY = 0; 
                x->mass[i].forceY = 0;

            }
        }
    }
}

void pmpd2d_minX(t_pmpd2d *x, t_float min)
{
    x->minX = min;
}

void pmpd2d_maxX(t_pmpd2d *x, t_float max)
{
    x->maxX = max;
}

void pmpd2d_minY(t_pmpd2d *x, t_float min)
{
    x->minY = min;
}

void pmpd2d_maxY(t_pmpd2d *x, t_float max)
{
    x->maxY = max;
}

void pmpd2d_min(t_pmpd2d *x, t_float minX, t_float minY)
{
    x->minX = minX;
    x->minY = minY;
}

void pmpd2d_max(t_pmpd2d *x, t_float maxX, t_float maxY)
{
    x->maxX = maxX;
    x->maxY = maxY;
}

void pmpd2d_setFixed(t_pmpd2d *x, t_symbol *s, int argc, t_atom *argv)
{
    int tmp, i;

    if ( argv[0].a_type == A_FLOAT ) 
    {
        tmp = atom_getfloatarg(0, argc, argv);
        tmp = max(0, min( x->nb_mass-1, tmp));
        x->mass[tmp].mobile = 0;
    }
    if ( argv[0].a_type == A_SYMBOL )
    {
        for (i=0; i< x->nb_mass; i++)
        {
            if ( atom_getsymbolarg(0,argc,argv) == x->mass[i].Id)
            {
                x->mass[i].mobile = 0;
            }
        }
    }
}

void pmpd2d_setMobile(t_pmpd2d *x, t_symbol *s, int argc, t_atom *argv)
{
    int tmp, i;

    if ( argv[0].a_type == A_FLOAT )
    {
        tmp = atom_getfloatarg(0, argc, argv);
        tmp = max(0, min( x->nb_mass-1, tmp));
        x->mass[tmp].mobile = 1;
    }
    if ( argv[0].a_type == A_SYMBOL ) 
    {
        for (i=0; i< x->nb_mass; i++)
        {
            if ( atom_getsymbolarg(0,argc,argv) == x->mass[i].Id)
            {
                x->mass[i].mobile = 1;
            }
        }
    }
}

void pmpd2d_setD2(t_pmpd2d *x, t_symbol *s, int argc, t_atom *argv)
{
    int tmp, i;

    if ( ( argv[0].a_type == A_FLOAT ) && ( argv[1].a_type == A_FLOAT ) )
    {
        tmp = atom_getfloatarg(0, argc, argv);
        tmp = max(0, min( x->nb_mass-1, tmp));
        x->mass[tmp].D2 = atom_getfloatarg(1, argc, argv);
    }
    if ( ( argv[0].a_type == A_SYMBOL ) && ( argv[1].a_type == A_FLOAT ) )
    {
        for (i=0; i< x->nb_mass; i++)
        {
            if ( atom_getsymbolarg(0,argc,argv) == x->mass[i].Id)
            {
                x->mass[i].D2 = atom_getfloatarg(1, argc, argv);
            }
        }
    }
    if ( ( argv[0].a_type == A_FLOAT ) && ( argc == 1 ) )
    {
        for (i=0; i< x->nb_mass; i++)
        {
            x->mass[i].D2 = atom_getfloatarg(0, argc, argv);
        }
    }
}

void pmpd2d_setD2offset(t_pmpd2d *x, t_symbol *s, int argc, t_atom *argv)
{
    int tmp, i;

    if ( ( argv[0].a_type == A_FLOAT ) && ( argv[1].a_type == A_FLOAT ) )
    {
        tmp = atom_getfloatarg(0, argc, argv);
        tmp = max(0, min( x->nb_mass-1, tmp));
        x->mass[tmp].D2offset = atom_getfloatarg(1, argc, argv);
    }
    if ( ( argv[0].a_type == A_SYMBOL ) && ( argv[1].a_type == A_FLOAT ) )
    {
        for (i=0; i< x->nb_mass; i++)
        {
            if ( atom_getsymbolarg(0,argc,argv) == x->mass[i].Id)
            {
                x->mass[i].D2offset = atom_getfloatarg(1, argc, argv);
            }
        }
    }
    if ( ( argv[0].a_type == A_FLOAT ) && ( argc == 1 ) )
    {
        for (i=0; i< x->nb_mass; i++)
        {
            x->mass[i].D2offset = atom_getfloatarg(0, argc, argv);
        }
    }
}

void pmpd2d_setSpeedX(t_pmpd2d *x, t_symbol *s, int argc, t_atom *argv)
{
    int tmp, i;

    if ( ( argv[0].a_type == A_FLOAT ) && ( argv[1].a_type == A_FLOAT ) )
    {
        tmp = atom_getfloatarg(0, argc, argv);
        tmp = max(0, min( x->nb_mass-1, tmp));
        x->mass[tmp].speedX = atom_getfloatarg(1, argc, argv);
    }
    if ( ( argv[0].a_type == A_SYMBOL ) && ( argv[1].a_type == A_FLOAT ) )
    {
        for (i=0; i< x->nb_mass; i++)
        {
            if ( atom_getsymbolarg(0,argc,argv) == x->mass[i].Id)
            {
                x->mass[i].speedX = atom_getfloatarg(1, argc, argv);
            }
        }
    }
}

void pmpd2d_setSpeedY(t_pmpd2d *x, t_symbol *s, int argc, t_atom *argv)
{
    int tmp, i;

    if ( ( argv[0].a_type == A_FLOAT ) && ( argv[1].a_type == A_FLOAT ) )
    {
        tmp = atom_getfloatarg(0, argc, argv);
        tmp = max(0, min( x->nb_mass-1, tmp));
        x->mass[tmp].speedY = atom_getfloatarg(1, argc, argv);
    }
    if ( ( argv[0].a_type == A_SYMBOL ) && ( argv[1].a_type == A_FLOAT ) )
    {
        for (i=0; i< x->nb_mass; i++)
        {
            if ( atom_getsymbolarg(0,argc,argv) == x->mass[i].Id)
            {
                x->mass[i].speedY = atom_getfloatarg(1, argc, argv);
            }
        }
    }
}

void pmpd2d_setSpeed(t_pmpd2d *x, t_symbol *s, int argc, t_atom *argv)
{
    int tmp, i;

    if ( ( argv[0].a_type == A_FLOAT ) && ( argv[1].a_type == A_FLOAT ) && ( argv[2].a_type == A_FLOAT ) )
    {
        tmp = atom_getfloatarg(0, argc, argv);
        tmp = max(0, min( x->nb_mass-1, tmp));
        x->mass[tmp].speedX = atom_getfloatarg(1, argc, argv);
        x->mass[tmp].speedY = atom_getfloatarg(2, argc, argv);
    }
    if ( ( argv[0].a_type == A_SYMBOL ) && ( argv[1].a_type == A_FLOAT ) && ( argv[2].a_type == A_FLOAT ) )
    {
        for (i=0; i< x->nb_mass; i++)
        {
            if ( atom_getsymbolarg(0,argc,argv) == x->mass[i].Id)
            {
                x->mass[i].speedX = atom_getfloatarg(1, argc, argv);
                x->mass[i].speedY = atom_getfloatarg(2, argc, argv);
            }
        }
    }
}

void pmpd2d_addPosX(t_pmpd2d *x, t_symbol *s, int argc, t_atom *argv)
{
    int tmp, i;

    if ( ( argv[0].a_type == A_FLOAT ) && ( argv[1].a_type == A_FLOAT ) )
    {
        tmp = atom_getfloatarg(0, argc, argv);
        tmp = max(0, min( x->nb_mass-1, tmp));
        x->mass[tmp].posX += atom_getfloatarg(1, argc, argv);
    }
    if ( ( argv[0].a_type == A_SYMBOL ) && ( argv[1].a_type == A_FLOAT ) )
    {
        for (i=0; i< x->nb_mass; i++)
        {
            if ( atom_getsymbolarg(0,argc,argv) == x->mass[i].Id)
            {
                x->mass[i].posX += atom_getfloatarg(1, argc, argv);
            }
        }
    }
}

void pmpd2d_addPosY(t_pmpd2d *x, t_symbol *s, int argc, t_atom *argv)
{
    int tmp, i;

    if ( ( argv[0].a_type == A_FLOAT ) && ( argv[1].a_type == A_FLOAT ) )
    {
        tmp = atom_getfloatarg(0, argc, argv);
        tmp = max(0, min( x->nb_mass-1, tmp));
        x->mass[tmp].posY += atom_getfloatarg(1, argc, argv);
    }
    if ( ( argv[0].a_type == A_SYMBOL ) && ( argv[1].a_type == A_FLOAT ) )
    {
        for (i=0; i< x->nb_mass; i++)
        {
            if ( atom_getsymbolarg(0,argc,argv) == x->mass[i].Id)
            {
                x->mass[i].posY += atom_getfloatarg(1, argc, argv);
            }
        }
    }
}

void pmpd2d_addPos(t_pmpd2d *x, t_symbol *s, int argc, t_atom *argv)
{
    int tmp, i;

    if ( ( argv[0].a_type == A_FLOAT ) && ( argv[1].a_type == A_FLOAT ) && ( argv[2].a_type == A_FLOAT ) )
    {
        tmp = atom_getfloatarg(0, argc, argv);
        tmp = max(0, min( x->nb_mass-1, tmp));
        x->mass[tmp].posX += atom_getfloatarg(1, argc, argv);
        x->mass[tmp].posY += atom_getfloatarg(2, argc, argv);
    }
    if ( ( argv[0].a_type == A_SYMBOL ) && ( argv[1].a_type == A_FLOAT ) && ( argv[2].a_type == A_FLOAT ) )
    {
        for (i=0; i< x->nb_mass; i++)
        {
            if ( atom_getsymbolarg(0,argc,argv) == x->mass[i].Id)
            {
                x->mass[i].posX += atom_getfloatarg(1, argc, argv);
                x->mass[i].posY += atom_getfloatarg(2, argc, argv);
            }
        }
    }
}

void pmpd2d_setForceX(t_pmpd2d *x, t_symbol *s, int argc, t_atom *argv)
{
    int tmp, i;

    if ( ( argv[0].a_type == A_FLOAT ) && ( argv[1].a_type == A_FLOAT ) )
    {
        tmp = atom_getfloatarg(0, argc, argv);
        tmp = max(0, min( x->nb_mass-1, tmp));
        x->mass[tmp].forceX = atom_getfloatarg(1, argc, argv);
    }
    if ( ( argv[0].a_type == A_SYMBOL ) && ( argv[1].a_type == A_FLOAT ) )
    {
        for (i=0; i< x->nb_mass; i++)
        {
            if ( atom_getsymbolarg(0,argc,argv) == x->mass[i].Id)
            {
                x->mass[i].forceX = atom_getfloatarg(1, argc, argv);
            }
        }
    }
}

void pmpd2d_setForceY(t_pmpd2d *x, t_symbol *s, int argc, t_atom *argv)
{
    int tmp, i;

    if ( ( argv[0].a_type == A_FLOAT ) && ( argv[1].a_type == A_FLOAT ) )
    {
        tmp = atom_getfloatarg(0, argc, argv);
        tmp = max(0, min( x->nb_mass-1, tmp));
        x->mass[tmp].forceY = atom_getfloatarg(1, argc, argv);
    }
    if ( ( argv[0].a_type == A_SYMBOL ) && ( argv[1].a_type == A_FLOAT ) )
    {
        for (i=0; i< x->nb_mass; i++)
        {
            if ( atom_getsymbolarg(0,argc,argv) == x->mass[i].Id)
            {
                x->mass[i].forceY = atom_getfloatarg(1, argc, argv);
            }
        }
    }
}

void pmpd2d_setForce(t_pmpd2d *x, t_symbol *s, int argc, t_atom *argv)
{
    int tmp, i;

    if ( ( argv[0].a_type == A_FLOAT ) && ( argv[1].a_type == A_FLOAT ) && ( argv[2].a_type == A_FLOAT ) )
    {
        tmp = atom_getfloatarg(0, argc, argv);
        tmp = max(0, min( x->nb_mass-1, tmp));
        x->mass[tmp].forceX = atom_getfloatarg(1, argc, argv);
        x->mass[tmp].forceY = atom_getfloatarg(2, argc, argv);
    }
    if ( ( argv[0].a_type == A_SYMBOL ) && ( argv[1].a_type == A_FLOAT ) && ( argv[2].a_type == A_FLOAT ) )
    {
        for (i=0; i< x->nb_mass; i++)
        {
            if ( atom_getsymbolarg(0,argc,argv) == x->mass[i].Id)
            {
                x->mass[i].forceX = atom_getfloatarg(1, argc, argv);
                x->mass[i].forceY = atom_getfloatarg(2, argc, argv);
            }
        }
    }
}

void pmpd2d_get(t_pmpd2d *x, t_symbol *s, int argc, t_atom *argv)
{
    int i;
    t_symbol *toget; 
    t_atom  toout[5];
    toget = atom_getsymbolarg(0, argc, argv);

    if ( (toget == gensym("massesPos")) && (argv[1].a_type == A_FLOAT) )
    {
        i = atom_getfloatarg(1, argc, argv);
        if ( (i>=0) && (i<x->nb_mass) )
        {
            SETFLOAT(&(toout[0]), i);
            SETFLOAT(&(toout[1]), x->mass[i].posX);
            SETFLOAT(&(toout[2]), x->mass[i].posY);
            outlet_anything(x->main_outlet, gensym("massesPosNo"), 3, toout);
        }  
    }
    else
    if ( (toget == gensym("massesPos")) && (argv[1].a_type == A_SYMBOL) )
    {
        for (i=0; i< x->nb_mass; i++)
        {
            if ( atom_getsymbolarg(1,argc,argv) == x->mass[i].Id)
            {
                SETFLOAT(&(toout[0]), i);
                SETFLOAT(&(toout[1]), x->mass[i].posX);
                SETFLOAT(&(toout[2]), x->mass[i].posY);
                outlet_anything(x->main_outlet, gensym("massesPosId"), 3, toout);
            }
        } 
    }
    else
    if ( (toget == gensym("massesPos")) && (argc == 1) )
    {
        for (i=0; i< x->nb_mass; i++)
        {
            SETFLOAT(&(toout[0]), i);
            SETFLOAT(&(toout[1]), x->mass[i].posX);
            SETFLOAT(&(toout[2]), x->mass[i].posY);
            outlet_anything(x->main_outlet, gensym("massesPos"), 3, toout);
        } 
    }
    else
    if ( (toget == gensym("massesPosName")) && (argv[1].a_type == A_FLOAT) )
    {
        i = atom_getfloatarg(1, argc, argv);
        if ( (i>=0) && (i<x->nb_mass) )
        {
            SETSYMBOL(&(toout[0]), x->mass[i].Id);
            SETFLOAT(&(toout[1]), x->mass[i].posX);
            SETFLOAT(&(toout[2]), x->mass[i].posY);
            outlet_anything(x->main_outlet, gensym("massesPosNameNo"), 3, toout);
        }  
    }
    else
    if ( (toget == gensym("massesPosName")) && (argv[1].a_type == A_SYMBOL) )
    {
        for (i=0; i< x->nb_mass; i++)
        {
            if ( atom_getsymbolarg(1,argc,argv) == x->mass[i].Id)
            {
                SETSYMBOL(&(toout[0]), x->mass[i].Id);
                SETFLOAT(&(toout[1]), x->mass[i].posX);
                SETFLOAT(&(toout[2]), x->mass[i].posY);
                outlet_anything(x->main_outlet, gensym("massesPosNameId"), 3, toout);
            }
        } 
    }
    else
    if ( (toget == gensym("massesPosName")) && (argc == 1) )
    {
        for (i=0; i< x->nb_mass; i++)
        {
            SETSYMBOL(&(toout[0]), x->mass[i].Id);
            SETFLOAT(&(toout[1]), x->mass[i].posX);
            SETFLOAT(&(toout[2]), x->mass[i].posY);
            outlet_anything(x->main_outlet, gensym("massesPosName"), 3, toout);
        } 
    }
    else
    if ( (toget == gensym("massesSpeeds")) && (argv[1].a_type == A_FLOAT) )
    {
        i = atom_getfloatarg(1, argc, argv);
        if ( (i>=0) && (i<x->nb_mass) )
        {
            SETFLOAT(&(toout[0]), i);
            SETFLOAT(&(toout[1]), x->mass[i].speedX);
            SETFLOAT(&(toout[2]), x->mass[i].speedY);
            outlet_anything(x->main_outlet, gensym("massesSpeedsNo"), 3, toout);
        }  
    }
    else
    if ( (toget == gensym("massesSpeeds")) && (argv[1].a_type == A_SYMBOL) )
    {
        for (i=0; i< x->nb_mass; i++)
        {
            if ( atom_getsymbolarg(1,argc,argv) == x->mass[i].Id)
            {
                SETFLOAT(&(toout[0]), i);
                SETFLOAT(&(toout[1]), x->mass[i].speedX);
                SETFLOAT(&(toout[2]), x->mass[i].speedY);
                outlet_anything(x->main_outlet, gensym("massesSpeedsId"), 3, toout);
            }
        } 
    }
    else
    if ( (toget == gensym("massesSpeeds")) && (argc == 1) )
    {
        for (i=0; i< x->nb_mass; i++)
        {
            SETFLOAT(&(toout[0]), i);
            SETFLOAT(&(toout[1]), x->mass[i].speedX);
            SETFLOAT(&(toout[2]), x->mass[i].speedY);
            outlet_anything(x->main_outlet, gensym("massesSpeeds"), 3, toout);
        } 
    }
    else
    if ( (toget == gensym("massesSpeedsName")) && (argv[1].a_type == A_FLOAT) )
    {
        i = atom_getfloatarg(1, argc, argv);
        if ( (i>=0) && (i<x->nb_mass) )
        {
            SETSYMBOL(&(toout[0]), x->mass[i].Id);
            SETFLOAT(&(toout[1]), x->mass[i].speedX);
            SETFLOAT(&(toout[2]), x->mass[i].speedY);
            outlet_anything(x->main_outlet, gensym("massesSpeedsNameNo"), 3, toout);
        }  
    }
    else
    if ( (toget == gensym("massesSpeedsName")) && (argv[1].a_type == A_SYMBOL) )
    {
        for (i=0; i< x->nb_mass; i++)
        {
            if ( atom_getsymbolarg(1,argc,argv) == x->mass[i].Id)
            {
                SETSYMBOL(&(toout[0]), x->mass[i].Id);
                SETFLOAT(&(toout[1]), x->mass[i].speedX);
                SETFLOAT(&(toout[2]), x->mass[i].speedY);
                outlet_anything(x->main_outlet, gensym("massesSpeedsNameId"), 3, toout);
            }
        } 
    }
    else
    if ( (toget == gensym("massesSpeedsName")) && (argc == 1) )
    {
        for (i=0; i< x->nb_mass; i++)
        {
            SETSYMBOL(&(toout[0]), x->mass[i].Id);
            SETFLOAT(&(toout[1]), x->mass[i].speedX);
            SETFLOAT(&(toout[2]), x->mass[i].speedY);
            outlet_anything(x->main_outlet, gensym("massesSpeedsName"), 3, toout);
        } 
    }
    else
    if ( (toget == gensym("massesForces")) && (argv[1].a_type == A_FLOAT) )
    {
        i = atom_getfloatarg(1, argc, argv);
        if ( (i>=0) && (i<x->nb_mass) )
        {
            SETFLOAT(&(toout[0]), i);
            SETFLOAT(&(toout[1]), x->mass[i].forceX);
            SETFLOAT(&(toout[2]), x->mass[i].forceY);
            outlet_anything(x->main_outlet, gensym("massesForcesNo"), 3, toout);
        }  
    }
    else
    if ( (toget == gensym("massesForces")) && (argv[1].a_type == A_SYMBOL) )
    {
        for (i=0; i< x->nb_mass; i++)
        {
            if ( atom_getsymbolarg(1,argc,argv) == x->mass[i].Id)
            {
                SETFLOAT(&(toout[0]), i);
                SETFLOAT(&(toout[1]), x->mass[i].forceX);
                SETFLOAT(&(toout[2]), x->mass[i].forceY);
                outlet_anything(x->main_outlet, gensym("massesForcesId"), 3, toout);
            }
        } 
    }
    else
    if ( (toget == gensym("massesForces")) && (argc == 1) )
    {
        for (i=0; i< x->nb_mass; i++)
        {
            SETFLOAT(&(toout[0]), i);
            SETFLOAT(&(toout[1]), x->mass[i].forceX);
            SETFLOAT(&(toout[2]), x->mass[i].forceY);
            outlet_anything(x->main_outlet, gensym("massesForces"), 3, toout);
        } 
    }
    else
    if ( (toget == gensym("massesForcesName")) && (argv[1].a_type == A_FLOAT) )
    {
        i = atom_getfloatarg(1, argc, argv);
        if ( (i>=0) && (i<x->nb_mass) )
        {
            SETSYMBOL(&(toout[0]), x->mass[i].Id);
            SETFLOAT(&(toout[1]), x->mass[i].forceX);
            SETFLOAT(&(toout[2]), x->mass[i].forceY);
            outlet_anything(x->main_outlet, gensym("massesForcesNameNo"), 3, toout);
        }
    }
    else
    if ( (toget == gensym("massesForcesName")) && (argv[1].a_type == A_SYMBOL) )
    {
        for (i=0; i< x->nb_mass; i++)
        {
            if ( atom_getsymbolarg(1,argc,argv) == x->mass[i].Id)
            {
                SETSYMBOL(&(toout[0]), x->mass[i].Id);
                SETFLOAT(&(toout[1]), x->mass[i].forceX);
                SETFLOAT(&(toout[2]), x->mass[i].forceY);
                outlet_anything(x->main_outlet, gensym("massesForcesNameId"), 3, toout);
            }
        } 
    }
    else
    if ( (toget == gensym("massesForcesName")) && (argc == 1) )
    {
        for (i=0; i< x->nb_mass; i++)
        {
            SETSYMBOL(&(toout[0]), x->mass[i].Id);
            SETFLOAT(&(toout[1]), x->mass[i].forceX);
            SETFLOAT(&(toout[2]), x->mass[i].forceY);
            outlet_anything(x->main_outlet, gensym("massesForcesName"), 3, toout);
        } 
    }
    else
    if ( (toget == gensym("linksPos")) && (argv[1].a_type == A_FLOAT) )
    {
        i = atom_getfloatarg(1, argc, argv);
        if ( (i>=0) && (i<x->nb_mass) )
        {
            SETFLOAT(&(toout[0]), i);
            SETFLOAT(&(toout[1]), x->link[i].mass1->posX);
            SETFLOAT(&(toout[2]), x->link[i].mass1->posY);
            SETFLOAT(&(toout[3]), x->link[i].mass2->posX);
            SETFLOAT(&(toout[4]), x->link[i].mass2->posY);
            outlet_anything(x->main_outlet, gensym("linksPosNo"), 5, toout);
        }
    }
    else
    if ( (toget == gensym("linksPos")) && (argv[1].a_type == A_SYMBOL) )
    {
        for (i=0; i< x->nb_link; i++)
        {
            if ( atom_getsymbolarg(1,argc,argv) == x->link[i].Id)
            {
                SETFLOAT(&(toout[0]), i);
                SETFLOAT(&(toout[1]), x->link[i].mass1->posX);
                SETFLOAT(&(toout[2]), x->link[i].mass1->posY);
                SETFLOAT(&(toout[3]), x->link[i].mass2->posX);
                SETFLOAT(&(toout[4]), x->link[i].mass2->posY);
                outlet_anything(x->main_outlet, gensym("linksPosNo"), 5, toout);
            }
        } 
    }
    else
    if ( (toget == gensym("linksPos")) && (argc == 1) )
    {
        for (i=0; i< x->nb_link; i++)
        {
            SETFLOAT(&(toout[0]), i);
            SETFLOAT(&(toout[1]), x->link[i].mass1->posX);
            SETFLOAT(&(toout[2]), x->link[i].mass1->posY);
            SETFLOAT(&(toout[3]), x->link[i].mass2->posX);
            SETFLOAT(&(toout[4]), x->link[i].mass2->posY);
            outlet_anything(x->main_outlet, gensym("linksPosNo"), 5, toout);
        } 
    }
    else
    if ( (toget == gensym("linksPosName")) && (argv[1].a_type == A_FLOAT) )
    {
        i = atom_getfloatarg(1, argc, argv);
        if ( (i>=0) && (i<x->nb_mass) )
        {
            SETFLOAT(&(toout[0]), i);
            SETFLOAT(&(toout[1]), x->link[i].mass1->posX);
            SETFLOAT(&(toout[2]), x->link[i].mass1->posY);
            SETFLOAT(&(toout[3]), x->link[i].mass2->posX);
            SETFLOAT(&(toout[4]), x->link[i].mass2->posY);
            outlet_anything(x->main_outlet, gensym("linksPosNo"), 5, toout);
        }
    }
    else
    if ( (toget == gensym("linksPosName")) && (argv[1].a_type == A_SYMBOL) )
    {
        for (i=0; i< x->nb_link; i++)
        {
            if ( atom_getsymbolarg(1,argc,argv) == x->link[i].Id)
            {
            SETFLOAT(&(toout[0]), i);
            SETFLOAT(&(toout[1]), x->link[i].mass1->posX);
            SETFLOAT(&(toout[2]), x->link[i].mass1->posY);
            SETFLOAT(&(toout[3]), x->link[i].mass2->posX);
            SETFLOAT(&(toout[4]), x->link[i].mass2->posY);
            outlet_anything(x->main_outlet, gensym("linksPosNo"), 5, toout);
            }
        } 
    }
    else
    if ( (toget == gensym("linksPosName")) && (argc == 1) )
    {
        for (i=0; i< x->nb_link; i++)
        {
            SETFLOAT(&(toout[0]), i);
            SETFLOAT(&(toout[1]), x->link[i].mass1->posX);
            SETFLOAT(&(toout[2]), x->link[i].mass1->posY);
            SETFLOAT(&(toout[3]), x->link[i].mass2->posX);
            SETFLOAT(&(toout[4]), x->link[i].mass2->posY);
            outlet_anything(x->main_outlet, gensym("linksPosNo"), 5, toout);
        } 
    }
    else
        error("not get attribute");
}

void pmpd2d_massesPosXL(t_pmpd2d *x)
{
    int i;
    t_atom pos_list[x->nb_mass];

    for (i=0; i < x->nb_mass; i++)
    {
        SETFLOAT(&(pos_list[i]),x->mass[i].posX);
    }
    outlet_anything(x->main_outlet, gensym("massesPosXL"),x->nb_mass , pos_list);
}

void pmpd2d_massesForcesXL(t_pmpd2d *x)
{
    int i;
    t_atom pos_list[x->nb_mass];

    for (i=0; i< x->nb_mass; i++)
    {
        SETFLOAT(&(pos_list[i]),x->mass[i].forceX);
    }
    outlet_anything(x->main_outlet, gensym("massesForcesXL"),x->nb_mass , pos_list);
}

void pmpd2d_massesSpeedsXL(t_pmpd2d *x)
{
    int i;
    t_atom pos_list[x->nb_mass];

    for (i=0; i< x->nb_mass; i++)
    {
        SETFLOAT(&(pos_list[i]),x->mass[i].speedX);
    }
    outlet_anything(x->main_outlet, gensym("massesSpeedsXL"),x->nb_mass , pos_list);
}

void pmpd2d_massesPosXT(t_pmpd2d *x, t_symbol *s, int argc, t_atom *argv)
{
    int i, j, vecsize;
    t_garray *a;
    t_word *vec;
    if ( (argc==1) && (argv[0].a_type == A_SYMBOL) )
    {
        t_symbol *tab_name = atom_getsymbolarg(0, argc, argv);
        if (!(a = (t_garray *)pd_findbyclass(tab_name, garray_class)))
            pd_error(x, "%s: no such array", tab_name->s_name);
        else if (!garray_getfloatwords(a, &vecsize, &vec))
            pd_error(x, "%s: bad template for tabwrite", tab_name->s_name);
        else
        {
            int taille_max = x->nb_mass;
            taille_max = min(taille_max, vecsize);
            for (i=0; i < taille_max ; i++)
            {
                vec[i].w_float = x->mass[i].posX;
            }
            garray_redraw(a);
        }
    }
    else 
    if ( (argc==2) && (argv[0].a_type == A_SYMBOL) && (argv[1].a_type == A_SYMBOL) )
    {
        t_symbol *tab_name = atom_getsymbolarg(0, argc, argv);
        if (!(a = (t_garray *)pd_findbyclass(tab_name, garray_class)))
            pd_error(x, "%s: no such array", tab_name->s_name);
        else if (!garray_getfloatwords(a, &vecsize, &vec))
            pd_error(x, "%s: bad template for tabwrite", tab_name->s_name);
        else
        {    
            i = 0;
            j = 0;
            while ((i < vecsize) && (j < x->nb_mass))
            {
                if (atom_getsymbolarg(1,argc,argv) == x->mass[j].Id)
                {
                    vec[i].w_float = x->mass[j].posX;
                    i++;
                }
                j++;
            }
            garray_redraw(a);
        }
    }
}

void pmpd2d_massesSpeedsXT(t_pmpd2d *x, t_symbol *s, int argc, t_atom *argv)
{
    int i, j, vecsize;
    t_garray *a;
    t_word *vec;
    
    if ( (argc==1) && (argv[0].a_type == A_SYMBOL) )
    {        
        t_symbol *tab_name = atom_getsymbolarg(0, argc, argv);
        if (!(a = (t_garray *)pd_findbyclass(tab_name, garray_class)))
            pd_error(x, "%s: no such array", tab_name->s_name);
        else if (!garray_getfloatwords(a, &vecsize, &vec))
            pd_error(x, "%s: bad template for tabwrite", tab_name->s_name);
        else
        {
            int taille_max = x->nb_mass;
            taille_max = min(taille_max, vecsize);
            for (i=0; i < taille_max ; i++)
            {
                vec[i].w_float = x->mass[i].speedX;
            }
            garray_redraw(a);
        }
    }
    else 
    if ( (argc==2) && (argv[0].a_type == A_SYMBOL) && (argv[1].a_type == A_SYMBOL) )
    {
        t_symbol *tab_name = atom_getsymbolarg(0, argc, argv);
        if (!(a = (t_garray *)pd_findbyclass(tab_name, garray_class)))
            pd_error(x, "%s: no such array", tab_name->s_name);
        else if (!garray_getfloatwords(a, &vecsize, &vec))
            pd_error(x, "%s: bad template for tabwrite", tab_name->s_name);
        else
        {    
            i = 0;
            j = 0;
            while ((i < vecsize) && (j < x->nb_mass))
            {
                if (atom_getsymbolarg(1,argc,argv) == x->mass[j].Id)
                {
                    vec[i].w_float = x->mass[j].speedX;
                    i++;
                }
                j++;
            }
            garray_redraw(a);
        }
    }
}

void pmpd2d_massesForcesXT(t_pmpd2d *x, t_symbol *s, int argc, t_atom *argv)
{
    int i, j, vecsize;
    t_garray *a;
    t_word *vec;
    
    if ( (argc==1) && (argv[0].a_type == A_SYMBOL) )
    {
        t_symbol *tab_name = atom_getsymbolarg(0, argc, argv);
        if (!(a = (t_garray *)pd_findbyclass(tab_name, garray_class)))
            pd_error(x, "%s: no such array", tab_name->s_name);
        else if (!garray_getfloatwords(a, &vecsize, &vec))
            pd_error(x, "%s: bad template for tabwrite", tab_name->s_name);
        else
        {
            int taille_max = x->nb_mass;
            taille_max = min(taille_max, vecsize);
            for (i=0; i < taille_max ; i++)
            {
                vec[i].w_float = x->mass[i].forceX;
            }
            garray_redraw(a);
        }
    }
    else 
    if ( (argc==2) && (argv[0].a_type == A_SYMBOL) && (argv[1].a_type == A_SYMBOL) )
    {
        t_symbol *tab_name = atom_getsymbolarg(0, argc, argv);
        if (!(a = (t_garray *)pd_findbyclass(tab_name, garray_class)))
            pd_error(x, "%s: no such array", tab_name->s_name);
        else if (!garray_getfloatwords(a, &vecsize, &vec))
            pd_error(x, "%s: bad template for tabwrite", tab_name->s_name);
        else
        {    
            i = 0;
            j = 0;
            while ((i < vecsize) && (j < x->nb_mass))
            {
                if (atom_getsymbolarg(1,argc,argv) == x->mass[j].Id)
                {
                    vec[i].w_float = x->mass[j].forceX;
                    i++;
                }
                j++;
            }
            garray_redraw(a);
        }
    }
}

void pmpd2d_massesPosYL(t_pmpd2d *x)
{
    int i;
    t_atom pos_list[x->nb_mass];

    for (i=0; i < x->nb_mass; i++)
    {
        SETFLOAT(&(pos_list[i]),x->mass[i].posY);
    }
    outlet_anything(x->main_outlet, gensym("massesPosYL"),x->nb_mass , pos_list);
}

void pmpd2d_massesForcesYL(t_pmpd2d *x)
{
    int i;
    t_atom pos_list[x->nb_mass];

    for (i=0; i< x->nb_mass; i++)
    {
        SETFLOAT(&(pos_list[i]),x->mass[i].forceY);
    }
    outlet_anything(x->main_outlet, gensym("massesForcesYL"),x->nb_mass , pos_list);
}

void pmpd2d_massesSpeedsYL(t_pmpd2d *x)
{
    int i;
    t_atom pos_list[x->nb_mass];

    for (i=0; i< x->nb_mass; i++)
    {
        SETFLOAT(&(pos_list[i]),x->mass[i].speedY);
    }
    outlet_anything(x->main_outlet, gensym("massesSpeedsYL"),x->nb_mass , pos_list);
}

void pmpd2d_massesPosYT(t_pmpd2d *x, t_symbol *s, int argc, t_atom *argv)
{
    int i, j, vecsize;
    t_garray *a;
    t_word *vec;
    
    if ( (argc==1) && (argv[0].a_type == A_SYMBOL) )
    {
        t_symbol *tab_name = atom_getsymbolarg(0, argc, argv);
        if (!(a = (t_garray *)pd_findbyclass(tab_name, garray_class)))
            pd_error(x, "%s: no such array", tab_name->s_name);
        else if (!garray_getfloatwords(a, &vecsize, &vec))
            pd_error(x, "%s: bad template for tabwrite", tab_name->s_name);
        else
        {
            int taille_max = x->nb_mass;
            taille_max = min(taille_max, vecsize);
            for (i=0; i < taille_max ; i++)
            {
                vec[i].w_float = x->mass[i].posY;
            }
            garray_redraw(a);
        }
    }
    else 
    if ( (argc==2) && (argv[0].a_type == A_SYMBOL) && (argv[1].a_type == A_SYMBOL) )
    {
        t_symbol *tab_name = atom_getsymbolarg(0, argc, argv);
        if (!(a = (t_garray *)pd_findbyclass(tab_name, garray_class)))
            pd_error(x, "%s: no such array", tab_name->s_name);
        else if (!garray_getfloatwords(a, &vecsize, &vec))
            pd_error(x, "%s: bad template for tabwrite", tab_name->s_name);
        else
        {    
            i = 0;
            j = 0;
            while ((i < vecsize) && (j < x->nb_mass))
            {
                if (atom_getsymbolarg(1,argc,argv) == x->mass[j].Id)
                {
                    vec[i].w_float = x->mass[j].posY;
                    i++;
                }
                j++;
            }
            garray_redraw(a);
        }
    }
}

void pmpd2d_massesSpeedsYT(t_pmpd2d *x, t_symbol *s, int argc, t_atom *argv)
{
    int i, j, vecsize;
    t_garray *a;
    t_word *vec;
    
    if ( (argc==1) && (argv[0].a_type == A_SYMBOL) )
    {
        t_symbol *tab_name = atom_getsymbolarg(0, argc, argv);
        if (!(a = (t_garray *)pd_findbyclass(tab_name, garray_class)))
            pd_error(x, "%s: no such array", tab_name->s_name);
        else if (!garray_getfloatwords(a, &vecsize, &vec))
            pd_error(x, "%s: bad template for tabwrite", tab_name->s_name);
        else
        {
            int taille_max = x->nb_mass;
            taille_max = min(taille_max, vecsize);
            for (i=0; i < taille_max ; i++)
            {
                vec[i].w_float = x->mass[i].speedY;
            }
            garray_redraw(a);
        }
    }
    else 
    if ( (argc==2) && (argv[0].a_type == A_SYMBOL) && (argv[1].a_type == A_SYMBOL) )
    {
        t_symbol *tab_name = atom_getsymbolarg(0, argc, argv);
        if (!(a = (t_garray *)pd_findbyclass(tab_name, garray_class)))
            pd_error(x, "%s: no such array", tab_name->s_name);
        else if (!garray_getfloatwords(a, &vecsize, &vec))
            pd_error(x, "%s: bad template for tabwrite", tab_name->s_name);
        else
        {    
            i = 0;
            j = 0;
            while ((i < vecsize) && (j < x->nb_mass))
            {
                if (atom_getsymbolarg(1,argc,argv) == x->mass[j].Id)
                {
                    vec[i].w_float = x->mass[j].speedY;
                    i++;
                }
                j++;
            }
            garray_redraw(a);
        }
    }
}

void pmpd2d_massesForcesYT(t_pmpd2d *x, t_symbol *s, int argc, t_atom *argv)
{
    int i, j, vecsize;
    t_garray *a;
    t_word *vec;
    
    if ( (argc==1) && (argv[0].a_type == A_SYMBOL) )
    {
        t_symbol *tab_name = atom_getsymbolarg(0, argc, argv);
        if (!(a = (t_garray *)pd_findbyclass(tab_name, garray_class)))
            pd_error(x, "%s: no such array", tab_name->s_name);
        else if (!garray_getfloatwords(a, &vecsize, &vec))
            pd_error(x, "%s: bad template for tabwrite", tab_name->s_name);
        else
        {
            int taille_max = x->nb_mass;
            taille_max = min(taille_max, vecsize);
            for (i=0; i < taille_max ; i++)
            {
                vec[i].w_float = x->mass[i].forceY;
            }
            garray_redraw(a);
        }
    }
    else 
    if ( (argc==2) && (argv[0].a_type == A_SYMBOL) && (argv[1].a_type == A_SYMBOL) )
    {
        t_symbol *tab_name = atom_getsymbolarg(0, argc, argv);
        if (!(a = (t_garray *)pd_findbyclass(tab_name, garray_class)))
            pd_error(x, "%s: no such array", tab_name->s_name);
        else if (!garray_getfloatwords(a, &vecsize, &vec))
            pd_error(x, "%s: bad template for tabwrite", tab_name->s_name);
        else
        {    
            i = 0;
            j = 0;
            while ((i < vecsize) && (j < x->nb_mass))
            {
                if (atom_getsymbolarg(1,argc,argv) == x->mass[j].Id)
                {
                    vec[i].w_float = x->mass[j].forceY;
                    i++;
                }
                j++;
            }
            garray_redraw(a);
        }
    }
}

void pmpd2d_massesPosL(t_pmpd2d *x)
{
    int i;
    t_atom pos_list[2*x->nb_mass];

    for (i=0; i < x->nb_mass; i++)
    {
        SETFLOAT(&(pos_list[2*i]  ),x->mass[i].posX);
        SETFLOAT(&(pos_list[2*i+1]),x->mass[i].posY);
    }
    outlet_anything(x->main_outlet, gensym("massesPosL"),2*x->nb_mass , pos_list);
}

void pmpd2d_massesForcesL(t_pmpd2d *x)
{
    int i;
    t_atom pos_list[2*x->nb_mass];

    for (i=0; i< x->nb_mass; i++)
    {
        SETFLOAT(&(pos_list[2*i]  ),x->mass[i].forceX);
        SETFLOAT(&(pos_list[2*i+1]),x->mass[i].forceY);
    }
    outlet_anything(x->main_outlet, gensym("massesForcesL"),2*x->nb_mass , pos_list);
}

void pmpd2d_massesSpeedsL(t_pmpd2d *x)
{
    int i;
    t_atom pos_list[2*x->nb_mass];

    for (i=0; i< x->nb_mass; i++)
    {
        SETFLOAT(&(pos_list[2*i]  ),x->mass[i].speedX);
        SETFLOAT(&(pos_list[2*i+1]),x->mass[i].speedY);
    }
    outlet_anything(x->main_outlet, gensym("massesSpeedsL"),2*x->nb_mass , pos_list);
}

void pmpd2d_massesPosT(t_pmpd2d *x, t_symbol *s, int argc, t_atom *argv)
{
    int i, j, vecsize;
    t_garray *a;
    t_word *vec;
    
    if ( (argc==1) && (argv[0].a_type == A_SYMBOL) )
    {
        t_symbol *tab_name = atom_getsymbolarg(0, argc, argv);
        if (!(a = (t_garray *)pd_findbyclass(tab_name, garray_class)))
            pd_error(x, "%s: no such array", tab_name->s_name);
        else if (!garray_getfloatwords(a, &vecsize, &vec))
            pd_error(x, "%s: bad template for tabwrite", tab_name->s_name);
        else
        {
            int taille_max = x->nb_mass;
            taille_max = min(taille_max, (vecsize-1)/2);
            for (i=0; i < taille_max ; i++)
            {
                vec[2*i  ].w_float = x->mass[i].posX;
                vec[2*i+1].w_float = x->mass[i].posY;
            }
            garray_redraw(a);
        }
    }
    else 
    if ( (argc==2) && (argv[0].a_type == A_SYMBOL) && (argv[1].a_type == A_SYMBOL) )
    {
        t_symbol *tab_name = atom_getsymbolarg(0, argc, argv);
        if (!(a = (t_garray *)pd_findbyclass(tab_name, garray_class)))
            pd_error(x, "%s: no such array", tab_name->s_name);
        else if (!garray_getfloatwords(a, &vecsize, &vec))
            pd_error(x, "%s: bad template for tabwrite", tab_name->s_name);
        else
        {    
            i = 0;
            j = 0;
            while ((i < vecsize-1) && (j < x->nb_mass))
            {
                if (atom_getsymbolarg(1,argc,argv) == x->mass[j].Id)
                {
                    vec[i].w_float = x->mass[j].posX;
                    i++;
                    vec[i].w_float = x->mass[j].posY;
                    i++;
                }
                j++;
            }
            garray_redraw(a);
        }
    }
}

void pmpd2d_massesSpeedsT(t_pmpd2d *x, t_symbol *s, int argc, t_atom *argv)
{
    int i, j, vecsize;
    t_garray *a;
    t_word *vec;
    
    if ( (argc==1) && (argv[0].a_type == A_SYMBOL) )
    {
        t_symbol *tab_name = atom_getsymbolarg(0, argc, argv);
        if (!(a = (t_garray *)pd_findbyclass(tab_name, garray_class)))
            pd_error(x, "%s: no such array", tab_name->s_name);
        else if (!garray_getfloatwords(a, &vecsize, &vec))
            pd_error(x, "%s: bad template for tabwrite", tab_name->s_name);
        else
        {
            int taille_max = x->nb_mass;
            taille_max = min(taille_max, (vecsize-1)/2);
            for (i=0; i < taille_max ; i++)
            {
                vec[2*i  ].w_float = x->mass[i].speedX;
                vec[2*i+1].w_float = x->mass[i].speedY;
            }
            garray_redraw(a);
        }
    }
    else 
    if ( (argc==2) && (argv[0].a_type == A_SYMBOL) && (argv[1].a_type == A_SYMBOL) )
    {
        t_symbol *tab_name = atom_getsymbolarg(0, argc, argv);
        if (!(a = (t_garray *)pd_findbyclass(tab_name, garray_class)))
            pd_error(x, "%s: no such array", tab_name->s_name);
        else if (!garray_getfloatwords(a, &vecsize, &vec))
            pd_error(x, "%s: bad template for tabwrite", tab_name->s_name);
        else
        {    
            i = 0;
            j = 0;
            while ((i < vecsize-1) && (j < x->nb_mass))
            {
                if (atom_getsymbolarg(1,argc,argv) == x->mass[j].Id)
                {
                    vec[i].w_float = x->mass[j].speedX;
                    i++;
                    vec[i].w_float = x->mass[j].speedY;
                    i++;
                }
                j++;
            }
            garray_redraw(a);
        }
    }
}

void pmpd2d_massesForcesT(t_pmpd2d *x, t_symbol *s, int argc, t_atom *argv)
{
    int i, j, vecsize;
    t_garray *a;
    t_word *vec;
    
    if ( (argc==1) && (argv[0].a_type == A_SYMBOL) )
    {
        t_symbol *tab_name = atom_getsymbolarg(0, argc, argv);
        if (!(a = (t_garray *)pd_findbyclass(tab_name, garray_class)))
            pd_error(x, "%s: no such array", tab_name->s_name);
        else if (!garray_getfloatwords(a, &vecsize, &vec))
            pd_error(x, "%s: bad template for tabwrite", tab_name->s_name);
        else
        {
            int taille_max = x->nb_mass;
            taille_max = min(taille_max, (vecsize-1)/2);
            for (i=0; i < taille_max ; i++)
            {
                vec[2*i  ].w_float = x->mass[i].forceX;
                vec[2*i+1].w_float = x->mass[i].forceY;
            }
            garray_redraw(a);
        }
    }
    else 
    if ( (argc==2) && (argv[0].a_type == A_SYMBOL) && (argv[1].a_type == A_SYMBOL) )
    {
        t_symbol *tab_name = atom_getsymbolarg(0, argc, argv);
        if (!(a = (t_garray *)pd_findbyclass(tab_name, garray_class)))
            pd_error(x, "%s: no such array", tab_name->s_name);
        else if (!garray_getfloatwords(a, &vecsize, &vec))
            pd_error(x, "%s: bad template for tabwrite", tab_name->s_name);
        else
        {    
            i = 0;
            j = 0;
            while ((i < vecsize-1) && (j < x->nb_mass))
            {
                if (atom_getsymbolarg(1,argc,argv) == x->mass[j].Id)
                {
                    vec[i].w_float = x->mass[j].forceX;
                    i++;
                    vec[i].w_float = x->mass[j].forceY;
                    i++;
                }
                j++;
            }
            garray_redraw(a);
        }
    }
}

void pmpd2d_massesPosNormL(t_pmpd2d *x)
{
    int i;
    t_atom pos_list[x->nb_mass];

    for (i=0; i < x->nb_mass; i++)
    {
        SETFLOAT(&(pos_list[i]),sqrt(sqr(x->mass[i].posX)+sqr(x->mass[i].posY)));
    }
    outlet_anything(x->main_outlet, gensym("massesPosNormL"),x->nb_mass , pos_list);
}

void pmpd2d_massesForcesNormL(t_pmpd2d *x)
{
    int i;
    t_atom pos_list[x->nb_mass];

    for (i=0; i< x->nb_mass; i++)
    {
        SETFLOAT(&(pos_list[i]),sqrt(sqr(x->mass[i].forceX)+sqr(x->mass[i].forceY)));
    }
    outlet_anything(x->main_outlet, gensym("massesForcesNormL"),x->nb_mass , pos_list);
}

void pmpd2d_massesSpeedsNormL(t_pmpd2d *x)
{
    int i;
    t_atom pos_list[x->nb_mass];

    for (i=0; i< x->nb_mass; i++)
    {
        SETFLOAT(&(pos_list[i]),sqrt(sqr(x->mass[i].speedX)+sqr(x->mass[i].speedY)));
    }
    outlet_anything(x->main_outlet, gensym("massesSpeedsNormL"),x->nb_mass , pos_list);
}

void pmpd2d_massesPosNormT(t_pmpd2d *x, t_symbol *s, int argc, t_atom *argv)
{
    int i, j, vecsize;
    t_garray *a;
    t_word *vec;
    
    if ( (argc==1) && (argv[0].a_type == A_SYMBOL) )
    {
        t_symbol *tab_name = atom_getsymbolarg(0, argc, argv);
        if (!(a = (t_garray *)pd_findbyclass(tab_name, garray_class)))
            pd_error(x, "%s: no such array", tab_name->s_name);
        else if (!garray_getfloatwords(a, &vecsize, &vec))
            pd_error(x, "%s: bad template for tabwrite", tab_name->s_name);
        else
        {
            int taille_max = x->nb_mass;
            taille_max = min(taille_max, vecsize);
            for (i=0; i < taille_max ; i++)
            {
                vec[i].w_float = sqrt(sqr(x->mass[i].posX)+sqr(x->mass[i].posY));
            }
            garray_redraw(a);
        }
    }
    else 
    if ( (argc==2) && (argv[0].a_type == A_SYMBOL) && (argv[1].a_type == A_SYMBOL) )
    {
        t_symbol *tab_name = atom_getsymbolarg(0, argc, argv);
        if (!(a = (t_garray *)pd_findbyclass(tab_name, garray_class)))
            pd_error(x, "%s: no such array", tab_name->s_name);
        else if (!garray_getfloatwords(a, &vecsize, &vec))
            pd_error(x, "%s: bad template for tabwrite", tab_name->s_name);
        else
        {    
            i = 0;
            j = 0;
            while ((i < vecsize) && (j < x->nb_mass))
            {
                if (atom_getsymbolarg(1,argc,argv) == x->mass[j].Id)
                {
                    vec[i].w_float = sqrt(sqr(x->mass[j].posX)+sqr(x->mass[j].posY));
                    i++;
                }
                j++;
            }
            garray_redraw(a);
        }
    }
}

void pmpd2d_massesSpeedsNormT(t_pmpd2d *x, t_symbol *s, int argc, t_atom *argv)
{

    int i, j, vecsize;
    t_garray *a;
    t_word *vec;
    
    if ( (argc==1) && (argv[0].a_type == A_SYMBOL) )
    {
        t_symbol *tab_name = atom_getsymbolarg(0, argc, argv);
        if (!(a = (t_garray *)pd_findbyclass(tab_name, garray_class)))
            pd_error(x, "%s: no such array", tab_name->s_name);
        else if (!garray_getfloatwords(a, &vecsize, &vec))
            pd_error(x, "%s: bad template for tabwrite", tab_name->s_name);
        else
        {
            int taille_max = x->nb_mass;
            taille_max = min(taille_max, vecsize);
            for (i=0; i < taille_max ; i++)
            {
                vec[i].w_float = sqrt(sqr(x->mass[i].speedX)+sqr(x->mass[i].speedY));
            }
            garray_redraw(a);
        }
    }
    else 
    if ( (argc==2) && (argv[0].a_type == A_SYMBOL) && (argv[1].a_type == A_SYMBOL) )
    {
        t_symbol *tab_name = atom_getsymbolarg(0, argc, argv);
        if (!(a = (t_garray *)pd_findbyclass(tab_name, garray_class)))
            pd_error(x, "%s: no such array", tab_name->s_name);
        else if (!garray_getfloatwords(a, &vecsize, &vec))
            pd_error(x, "%s: bad template for tabwrite", tab_name->s_name);
        else
        {    
            i = 0;
            j = 0;
            while ((i < vecsize) && (j < x->nb_mass))
            {
                if (atom_getsymbolarg(1,argc,argv) == x->mass[j].Id)
                {
                    vec[i].w_float = sqrt(sqr(x->mass[j].speedX)+sqr(x->mass[j].speedY));
                    i++;
                }
                j++;
            }
            garray_redraw(a);
        }
    }
}

void pmpd2d_massesForcesNormT(t_pmpd2d *x, t_symbol *s, int argc, t_atom *argv)
{
    int i, j, vecsize;
    t_garray *a;
    t_word *vec;
    
    if ( (argc==1) && (argv[0].a_type == A_SYMBOL) )
    {
        t_symbol *tab_name = atom_getsymbolarg(0, argc, argv);
        if (!(a = (t_garray *)pd_findbyclass(tab_name, garray_class)))
            pd_error(x, "%s: no such array", tab_name->s_name);
        else if (!garray_getfloatwords(a, &vecsize, &vec))
            pd_error(x, "%s: bad template for tabwrite", tab_name->s_name);
        else
        {
            int taille_max = x->nb_mass;
            taille_max = min(taille_max, vecsize);
            for (i=0; i < taille_max ; i++)
            {
                vec[i].w_float = sqrt(sqr(x->mass[i].forceX)+sqr(x->mass[i].forceY));
            }
            garray_redraw(a);
        }
    }
    else 
    if ( (argc==2) && (argv[0].a_type == A_SYMBOL) && (argv[1].a_type == A_SYMBOL) )
    {
        t_symbol *tab_name = atom_getsymbolarg(0, argc, argv);
        if (!(a = (t_garray *)pd_findbyclass(tab_name, garray_class)))
            pd_error(x, "%s: no such array", tab_name->s_name);
        else if (!garray_getfloatwords(a, &vecsize, &vec))
            pd_error(x, "%s: bad template for tabwrite", tab_name->s_name);
        else
        {    
            i = 0;
            j = 0;
            while ((i < vecsize) && (j < x->nb_mass))
            {
                if (atom_getsymbolarg(1,argc,argv) == x->mass[j].Id)
                {
                    vec[i].w_float = sqrt(sqr(x->mass[j].forceX)+sqr(x->mass[j].forceY));
                    i++;
                }
                j++;
            }
            garray_redraw(a);
        }
    }
}

void pmpd2d_massesPosMean(t_pmpd2d *x, t_symbol *s, int argc, t_atom *argv)
{
    t_float sommeX, sommeY, somme;
    t_int i,j;
    t_atom mean[3];

    sommeX = 0;
    sommeY = 0;
    somme = 0;
    j = 0;
    
    if ( (argc >= 1) && (argv[0].a_type == A_SYMBOL) ) 
    {
        for (i=0; i< x->nb_mass; i++)
        {
            if (atom_getsymbolarg(0,argc,argv) == x->mass[i].Id)
            { 
                sommeX += x->mass[i].posX;
                sommeY += x->mass[i].posY;
                somme +=  sqrt(sqr(x->mass[i].posX) + sqr(x->mass[i].posY)); // distance au centre
                j++;
            }
        }
    }
    else
    {
        for (i=0; i< x->nb_mass; i++)
        {
                sommeX += x->mass[i].posX;
                sommeY += x->mass[i].posY;
                somme +=  sqrt(sqr(x->mass[i].posX) + sqr(x->mass[i].posY)); // distance au centre
                j++;
        }
    }    
    
    sommeX /= j;
    sommeY /= j;
    somme  /= j;    
    
    SETFLOAT(&(mean[0]),sommeX);
    SETFLOAT(&(mean[1]),sommeY);
    SETFLOAT(&(mean[2]),somme);
    
    outlet_anything(x->main_outlet, gensym("massesPosMean"),3 , mean);
}

void pmpd2d_massesPosStd(t_pmpd2d *x, t_symbol *s, int argc, t_atom *argv)
{
    t_float sommeX, sommeY, somme;
    t_int i,j;
    t_float stdX, stdY,std;
    t_atom std_out[3];

    sommeX = 0;
    sommeY = 0;
    somme  = 0;
    stdX = 0;
    stdY = 0;
    std  = 0;
    j = 0;
    
    if ( (argc >= 1) && (argv[0].a_type == A_SYMBOL) ) 
    {
        for (i=0; i< x->nb_mass; i++)
        {
            if (atom_getsymbolarg(0,argc,argv) == x->mass[i].Id)
            { 
                sommeX += x->mass[i].posX;
                sommeY += x->mass[i].posY;
                somme +=  sqrt(sqr(x->mass[i].posX) + sqr(x->mass[i].posY)); // distance au centre
                j++;
            }
        }
        sommeX /= j;
        sommeY /= j;
        somme /= j;
        for (i=0; i< x->nb_mass; i++)
        {
            if (atom_getsymbolarg(0,argc,argv) == x->mass[i].Id)
            { 
                stdX += sqr(x->mass[i].posX-sommeX);
                stdY += sqr(x->mass[i].posY-sommeY);
                std  +=  sqr(sqrt(sqr(x->mass[i].posX) + sqr(x->mass[i].posY))-somme);
            }
        }        
    }
    else
    {
        for (i=0; i< x->nb_mass; i++)
        {
            sommeX += x->mass[i].posX;
            sommeY += x->mass[i].posY;
            somme +=  sqrt(sqr(x->mass[i].posX) + sqr(x->mass[i].posY)); // distance au centre
            j++;
        }
        sommeX /= j;
        sommeY /= j;
        somme /= j;
        for (i=0; i< x->nb_mass; i++)
        {
            stdX += sqr(x->mass[i].posX-sommeX);
            stdY += sqr(x->mass[i].posY-sommeY);
            std  += sqr(sqrt(sqr(x->mass[i].posX) + sqr(x->mass[i].posY))-somme);
        }
    }    
    
    stdX = sqrt(stdX/j);
    stdY = sqrt(stdY/j);
    std  = sqrt(std /j);    

    SETFLOAT(&(std_out[0]),stdX);
    SETFLOAT(&(std_out[1]),stdY);
    SETFLOAT(&(std_out[2]),std);
    
    outlet_anything(x->main_outlet, gensym("massesPosStd"),3 , std_out);
}

void pmpd2d_massesForcesMean(t_pmpd2d *x, t_symbol *s, int argc, t_atom *argv)
{
    t_float sommeX, sommeY, somme;
    t_int i,j;
    t_atom mean[3];

    sommeX = 0;
    sommeY = 0;
    somme = 0;
    j = 0;
    
    if ( (argc >= 1) && (argv[0].a_type == A_SYMBOL) ) 
    {
        for (i=0; i< x->nb_mass; i++)
        {
            if (atom_getsymbolarg(0,argc,argv) == x->mass[i].Id)
            { 
                sommeX += x->mass[i].forceX;
                sommeY += x->mass[i].forceY;
                somme +=  sqrt(sqr(x->mass[i].forceX) + sqr(x->mass[i].forceY)); // distance au centre
                j++;
            }
        }
    }
    else
    {
        for (i=0; i< x->nb_mass; i++)
        {
                sommeX += x->mass[i].forceX;
                sommeY += x->mass[i].forceY;
                somme +=  sqrt(sqr(x->mass[i].forceX) + sqr(x->mass[i].forceY)); // distance au centre
                j++;
        }
    }    
    
    sommeX /= j;
    sommeY /= j;
    somme  /= j;    
    
    SETFLOAT(&(mean[0]),sommeX);
    SETFLOAT(&(mean[1]),sommeY);
    SETFLOAT(&(mean[2]),somme);
    
    outlet_anything(x->main_outlet, gensym("massesForcesMean"),3 , mean);
}

void pmpd2d_massesForcesStd(t_pmpd2d *x, t_symbol *s, int argc, t_atom *argv)
{
    t_float sommeX, sommeY, somme;
    t_int i,j;
    t_float stdX, stdY,std;
    t_atom std_out[3];

    sommeX = 0;
    sommeY = 0;
    somme  = 0;
    stdX = 0;
    stdY = 0;
    std  = 0;
    j = 0;
    
    if ( (argc >= 1) && (argv[0].a_type == A_SYMBOL) ) 
    {
        for (i=0; i< x->nb_mass; i++)
        {
            if (atom_getsymbolarg(0,argc,argv) == x->mass[i].Id)
            { 
                sommeX += x->mass[i].forceX;
                sommeY += x->mass[i].forceY;
                somme +=  sqrt(sqr(x->mass[i].forceX) + sqr(x->mass[i].forceY)); // distance au centre
                j++;
            }
        }
        sommeX /= j;
        sommeY /= j;
        somme /= j;
        for (i=0; i< x->nb_mass; i++)
        {
            if (atom_getsymbolarg(0,argc,argv) == x->mass[i].Id)
            { 
                stdX += sqr(x->mass[i].forceX-sommeX);
                stdY += sqr(x->mass[i].forceY-sommeY);
                std  +=  sqr(sqrt(sqr(x->mass[i].forceX) + sqr(x->mass[i].forceY))-somme);
            }
        }        
    }
    else
    {
        for (i=0; i< x->nb_mass; i++)
        {
            sommeX += x->mass[i].forceX;
            sommeY += x->mass[i].forceY;
            somme +=  sqrt(sqr(x->mass[i].forceX) + sqr(x->mass[i].forceY)); // distance au centre
            j++;
        }
        sommeX /= j;
        sommeY /= j;
        somme /= j;
        for (i=0; i< x->nb_mass; i++)
        {
            stdX += sqr(x->mass[i].forceX-sommeX);
            stdY += sqr(x->mass[i].forceY-sommeY);
            std  += sqr(sqrt(sqr(x->mass[i].forceX) + sqr(x->mass[i].forceY))-somme);
        }
    }    
    
    stdX = sqrt(stdX/j);
    stdY = sqrt(stdY/j);
    std  = sqrt(std /j);    

    SETFLOAT(&(std_out[0]),stdX);
    SETFLOAT(&(std_out[1]),stdY);
    SETFLOAT(&(std_out[2]),std);
    
    outlet_anything(x->main_outlet, gensym("massesForcesStd"),3 , std_out);
}

void pmpd2d_massesSpeedsMean(t_pmpd2d *x, t_symbol *s, int argc, t_atom *argv)
{
    t_float sommeX, sommeY, somme;
    t_int i,j;
    t_atom mean[3];

    sommeX = 0;
    sommeY = 0;
    somme = 0;
    j = 0;
    
    if ( (argc >= 1) && (argv[0].a_type == A_SYMBOL) ) 
    {
        for (i=0; i< x->nb_mass; i++)
        {
            if (atom_getsymbolarg(0,argc,argv) == x->mass[i].Id)
            { 
                sommeX += x->mass[i].speedX;
                sommeY += x->mass[i].speedY;
                somme +=  sqrt(sqr(x->mass[i].speedX) + sqr(x->mass[i].speedY)); // distance au centre
                j++;
            }
        }
    }
    else
    {
        for (i=0; i< x->nb_mass; i++)
        {
                sommeX += x->mass[i].speedX;
                sommeY += x->mass[i].speedY;
                somme +=  sqrt(sqr(x->mass[i].speedX) + sqr(x->mass[i].speedY)); // distance au centre
                j++;
        }
    }    
    
    sommeX /= j;
    sommeY /= j;
    somme  /= j;    
    
    SETFLOAT(&(mean[0]),sommeX);
    SETFLOAT(&(mean[1]),sommeY);
    SETFLOAT(&(mean[2]),somme);
    
    outlet_anything(x->main_outlet, gensym("massesSpeedsMean"),3 , mean);
}

void pmpd2d_massesSpeedsStd(t_pmpd2d *x, t_symbol *s, int argc, t_atom *argv)
{
    t_float sommeX, sommeY, somme;
    t_int i,j;
    t_float stdX, stdY,std;
    t_atom std_out[3];

    sommeX = 0;
    sommeY = 0;
    somme  = 0;
    stdX = 0;
    stdY = 0;
    std  = 0;
    j = 0;
    
    if ( (argc >= 1) && (argv[0].a_type == A_SYMBOL) ) 
    {
        for (i=0; i< x->nb_mass; i++)
        {
            if (atom_getsymbolarg(0,argc,argv) == x->mass[i].Id)
            { 
                sommeX += x->mass[i].speedX;
                sommeY += x->mass[i].speedY;
                somme +=  sqrt(sqr(x->mass[i].speedX) + sqr(x->mass[i].speedY)); // distance au centre
                j++;
            }
        }
        sommeX /= j;
        sommeY /= j;
        somme /= j;
        for (i=0; i< x->nb_mass; i++)
        {
            if (atom_getsymbolarg(0,argc,argv) == x->mass[i].Id)
            { 
                stdX += sqr(x->mass[i].speedX-sommeX);
                stdY += sqr(x->mass[i].speedY-sommeY);
                std  +=  sqr(sqrt(sqr(x->mass[i].speedX) + sqr(x->mass[i].speedY))-somme);
            }
        }        
    }
    else
    {
        for (i=0; i< x->nb_mass; i++)
        {
            sommeX += x->mass[i].speedX;
            sommeY += x->mass[i].speedY;
            somme +=  sqrt(sqr(x->mass[i].speedX) + sqr(x->mass[i].speedY)); // distance au centre
            j++;
        }
        sommeX /= j;
        sommeY /= j;
        somme /= j;
        for (i=0; i< x->nb_mass; i++)
        {
            stdX += sqr(x->mass[i].speedX-sommeX);
            stdY += sqr(x->mass[i].speedY-sommeY);
            std  += sqr(sqrt(sqr(x->mass[i].speedX) + sqr(x->mass[i].speedY))-somme);
        }
    }    
    
    stdX = sqrt(stdX/j);
    stdY = sqrt(stdY/j);
    std  = sqrt(std /j);    

    SETFLOAT(&(std_out[0]),stdX);
    SETFLOAT(&(std_out[1]),stdY);
    SETFLOAT(&(std_out[2]),std);
    
    outlet_anything(x->main_outlet, gensym("massesSpeedsStd"),3 , std_out);
}

// --------------------------------------------

void pmpd2d_linksPosXL(t_pmpd2d *x)
{
    int i;
    t_atom pos_list[x->nb_link];

    for (i=0; i < x->nb_link; i++)
    {
        SETFLOAT(&(pos_list[i]),(x->link[i].mass1->posX + x->link[i].mass2->posX)/2);
    }
    outlet_anything(x->main_outlet, gensym("linksPosXL"),x->nb_link , pos_list);
}

void pmpd2d_linksLengthXL(t_pmpd2d *x)
{
    int i;
    t_atom pos_list[x->nb_link];

    for (i=0; i < x->nb_link; i++)
    {
        SETFLOAT(&(pos_list[i]),x->link[i].mass2->posX - x->link[i].mass1->posX);
    }
    outlet_anything(x->main_outlet, gensym("linksLengthXL"),x->nb_link , pos_list);
}

void pmpd2d_linksPosSpeedXL(t_pmpd2d *x)
{
    int i;
    t_atom pos_list[x->nb_link];

    for (i=0; i < x->nb_link; i++)
    {
        SETFLOAT(&(pos_list[i]),(x->link[i].mass1->speedX + x->link[i].mass2->speedX)/2);
    }
    outlet_anything(x->main_outlet, gensym("linksPosSpeedXL"),x->nb_link , pos_list);
}

void pmpd2d_linksLengthSpeedXL(t_pmpd2d *x)
{
    int i;
    t_atom pos_list[x->nb_link];

    for (i=0; i < x->nb_link; i++)
    {
        SETFLOAT(&(pos_list[i]),x->link[i].mass2->speedX - x->link[i].mass1->speedX);
    }
    outlet_anything(x->main_outlet, gensym("linksLengthSpeedXL"),x->nb_link , pos_list);
}

void pmpd2d_linksPosXT(t_pmpd2d *x, t_symbol *s, int argc, t_atom *argv)
{
    int i, j, vecsize;
    t_garray *a;
    t_word *vec;
    
    if ( (argc==1) && (argv[0].a_type == A_SYMBOL) )
    {
        t_symbol *tab_name = atom_getsymbolarg(0, argc, argv);
        if (!(a = (t_garray *)pd_findbyclass(tab_name, garray_class)))
            pd_error(x, "%s: no such array", tab_name->s_name);
        else if (!garray_getfloatwords(a, &vecsize, &vec))
            pd_error(x, "%s: bad template for tabwrite", tab_name->s_name);
        else
        {
            int taille_max = x->nb_link;
            taille_max = min(taille_max, vecsize);
            for (i=0; i < taille_max ; i++)
            {
                vec[i].w_float = (x->link[i].mass1->posX + x->link[i].mass2->posX)/2;
            }
            garray_redraw(a);
        }
    }
    else 
    if ( (argc==2) && (argv[0].a_type == A_SYMBOL) && (argv[1].a_type == A_SYMBOL) )
    {
        t_symbol *tab_name = atom_getsymbolarg(0, argc, argv);
        if (!(a = (t_garray *)pd_findbyclass(tab_name, garray_class)))
            pd_error(x, "%s: no such array", tab_name->s_name);
        else if (!garray_getfloatwords(a, &vecsize, &vec))
            pd_error(x, "%s: bad template for tabwrite", tab_name->s_name);
        else
        {    
            i = 0;
            j = 0;
            while ((i < vecsize) && (j < x->nb_link))
            {
                if (atom_getsymbolarg(1,argc,argv) == x->link[j].Id)
                {
                    vec[i].w_float = (x->link[j].mass1->posX + x->link[j].mass2->posX)/2;
                    i++;
                }
                j++;
            }
            garray_redraw(a);
        }
    }
}

void pmpd2d_linksLengthXT(t_pmpd2d *x, t_symbol *s, int argc, t_atom *argv)
{
    int i, j, vecsize;
    t_garray *a;
    t_word *vec;
    
    if ( (argc==1) && (argv[0].a_type == A_SYMBOL) )
    {
        t_symbol *tab_name = atom_getsymbolarg(0, argc, argv);
        if (!(a = (t_garray *)pd_findbyclass(tab_name, garray_class)))
            pd_error(x, "%s: no such array", tab_name->s_name);
        else if (!garray_getfloatwords(a, &vecsize, &vec))
            pd_error(x, "%s: bad template for tabwrite", tab_name->s_name);
        else
        {
            int taille_max = x->nb_link;
            taille_max = min(taille_max, vecsize);
            for (i=0; i < taille_max ; i++)
            {
                vec[i].w_float = x->link[i].mass2->posX - x->link[i].mass1->posX;
            }
            garray_redraw(a);
        }
    }
    else 
    if ( (argc==2) && (argv[0].a_type == A_SYMBOL) && (argv[1].a_type == A_SYMBOL) )
    {
        t_symbol *tab_name = atom_getsymbolarg(0, argc, argv);
        if (!(a = (t_garray *)pd_findbyclass(tab_name, garray_class)))
            pd_error(x, "%s: no such array", tab_name->s_name);
        else if (!garray_getfloatwords(a, &vecsize, &vec))
            pd_error(x, "%s: bad template for tabwrite", tab_name->s_name);
        else
        {    
            i = 0;
            j = 0;
            while ((i < vecsize) && (j < x->nb_link))
            {
                if (atom_getsymbolarg(1,argc,argv) == x->link[j].Id)
                {
                    vec[i].w_float = x->link[j].mass2->posX - x->link[j].mass1->posX;
                    i++;
                }
                j++;
            }
            garray_redraw(a);
        }
    }
}

void pmpd2d_linksPosSpeedXT(t_pmpd2d *x, t_symbol *s, int argc, t_atom *argv)
{
    int i, j, vecsize;
    t_garray *a;
    t_word *vec;
    
    if ( (argc==1) && (argv[0].a_type == A_SYMBOL) )
    {
        t_symbol *tab_name = atom_getsymbolarg(0, argc, argv);
        if (!(a = (t_garray *)pd_findbyclass(tab_name, garray_class)))
            pd_error(x, "%s: no such array", tab_name->s_name);
        else if (!garray_getfloatwords(a, &vecsize, &vec))
            pd_error(x, "%s: bad template for tabwrite", tab_name->s_name);
        else
        {
            int taille_max = x->nb_link;
            taille_max = min(taille_max, vecsize);
            for (i=0; i < taille_max ; i++)
            {
                vec[i].w_float = (x->link[i].mass1->speedX + x->link[i].mass2->speedX)/2;
            }
            garray_redraw(a);
        }
    }
    else 
    if ( (argc==2) && (argv[0].a_type == A_SYMBOL) && (argv[1].a_type == A_SYMBOL) )
    {
        t_symbol *tab_name = atom_getsymbolarg(0, argc, argv);
        if (!(a = (t_garray *)pd_findbyclass(tab_name, garray_class)))
            pd_error(x, "%s: no such array", tab_name->s_name);
        else if (!garray_getfloatwords(a, &vecsize, &vec))
            pd_error(x, "%s: bad template for tabwrite", tab_name->s_name);
        else
        {    
            i = 0;
            j = 0;
            while ((i < vecsize) && (j < x->nb_link))
            {
                if (atom_getsymbolarg(1,argc,argv) == x->link[j].Id)
                {
                    vec[i].w_float = (x->link[j].mass1->speedX + x->link[j].mass2->speedX)/2;
                    i++;
                }
                j++;
            }
            garray_redraw(a);
        }
    }
}

void pmpd2d_linksLengthSpeedXT(t_pmpd2d *x, t_symbol *s, int argc, t_atom *argv)
{
    int i, j, vecsize;
    t_garray *a;
    t_word *vec;
    
    if ( (argc==1) && (argv[0].a_type == A_SYMBOL) )
    {
        t_symbol *tab_name = atom_getsymbolarg(0, argc, argv);
        if (!(a = (t_garray *)pd_findbyclass(tab_name, garray_class)))
            pd_error(x, "%s: no such array", tab_name->s_name);
        else if (!garray_getfloatwords(a, &vecsize, &vec))
            pd_error(x, "%s: bad template for tabwrite", tab_name->s_name);
        else
        {
            int taille_max = x->nb_link;
            taille_max = min(taille_max, vecsize);
            for (i=0; i < taille_max ; i++)
            {
                vec[i].w_float = x->link[i].mass2->speedX - x->link[i].mass1->speedX;
            }
            garray_redraw(a);
        }
    }
    else 
    if ( (argc==2) && (argv[0].a_type == A_SYMBOL) && (argv[1].a_type == A_SYMBOL) )
    {
        t_symbol *tab_name = atom_getsymbolarg(0, argc, argv);
        if (!(a = (t_garray *)pd_findbyclass(tab_name, garray_class)))
            pd_error(x, "%s: no such array", tab_name->s_name);
        else if (!garray_getfloatwords(a, &vecsize, &vec))
            pd_error(x, "%s: bad template for tabwrite", tab_name->s_name);
        else
        {    
            i = 0;
            j = 0;
            while ((i < vecsize) && (j < x->nb_link))
            {
                if (atom_getsymbolarg(1,argc,argv) == x->link[j].Id)
                {
                    vec[i].w_float = x->link[j].mass2->speedX - x->link[j].mass1->speedX;
                    i++;
                }
                j++;
            }
            garray_redraw(a);
        }
    }
}

void pmpd2d_linksPosYL(t_pmpd2d *x)
{
    int i;
    t_atom pos_list[x->nb_link];

    for (i=0; i < x->nb_link; i++)
    {
        SETFLOAT(&(pos_list[i]),(x->link[i].mass1->posY + x->link[i].mass2->posY)/2);
    }
    outlet_anything(x->main_outlet, gensym("linksPosYL"),x->nb_link , pos_list);
}

void pmpd2d_linksLengthYL(t_pmpd2d *x)
{
    int i;
    t_atom pos_list[x->nb_link];

    for (i=0; i < x->nb_link; i++)
    {
        SETFLOAT(&(pos_list[i]),x->link[i].mass2->posY - x->link[i].mass1->posY);
    }
    outlet_anything(x->main_outlet, gensym("linksLengthYL"),x->nb_link , pos_list);
}

void pmpd2d_linksPosSpeedYL(t_pmpd2d *x)
{
    int i;
    t_atom pos_list[x->nb_link];

    for (i=0; i < x->nb_link; i++)
    {
        SETFLOAT(&(pos_list[i]),(x->link[i].mass1->speedY + x->link[i].mass2->speedY)/2);
    }
    outlet_anything(x->main_outlet, gensym("linksPosSpeedYL"),x->nb_link , pos_list);
}

void pmpd2d_linksLengthSpeedYL(t_pmpd2d *x)
{
    int i;
    t_atom pos_list[x->nb_link];

    for (i=0; i < x->nb_link; i++)
    {
        SETFLOAT(&(pos_list[i]),x->link[i].mass2->speedY - x->link[i].mass1->speedY);
    }
    outlet_anything(x->main_outlet, gensym("linksLengthSpeedYL"),x->nb_link , pos_list);
}

void pmpd2d_linksPosYT(t_pmpd2d *x, t_symbol *s, int argc, t_atom *argv)
{
    int i, j, vecsize;
    t_garray *a;
    t_word *vec;
    
    if ( (argc==1) && (argv[0].a_type == A_SYMBOL) )
    {
        t_symbol *tab_name = atom_getsymbolarg(0, argc, argv);
        if (!(a = (t_garray *)pd_findbyclass(tab_name, garray_class)))
            pd_error(x, "%s: no such array", tab_name->s_name);
        else if (!garray_getfloatwords(a, &vecsize, &vec))
            pd_error(x, "%s: bad template for tabwrite", tab_name->s_name);
        else
        {
            int taille_max = x->nb_link;
            taille_max = min(taille_max, vecsize);
            for (i=0; i < taille_max ; i++)
            {
                vec[i].w_float = (x->link[i].mass1->posY + x->link[i].mass2->posY)/2;
            }
            garray_redraw(a);
        }
    }
    else 
    if ( (argc==2) && (argv[0].a_type == A_SYMBOL) && (argv[1].a_type == A_SYMBOL) )
    {
        t_symbol *tab_name = atom_getsymbolarg(0, argc, argv);
        if (!(a = (t_garray *)pd_findbyclass(tab_name, garray_class)))
            pd_error(x, "%s: no such array", tab_name->s_name);
        else if (!garray_getfloatwords(a, &vecsize, &vec))
            pd_error(x, "%s: bad template for tabwrite", tab_name->s_name);
        else
        {    
            i = 0;
            j = 0;
            while ((i < vecsize) && (j < x->nb_link))
            {
                if (atom_getsymbolarg(1,argc,argv) == x->link[j].Id)
                {
                    vec[i].w_float = (x->link[j].mass1->posY + x->link[j].mass2->posY)/2;
                    i++;
                }
                j++;
            }
            garray_redraw(a);
        }
    }
}

void pmpd2d_linksLengthYT(t_pmpd2d *x, t_symbol *s, int argc, t_atom *argv)
{
    int i, j, vecsize;
    t_garray *a;
    t_word *vec;
    
    if ( (argc==1) && (argv[0].a_type == A_SYMBOL) )
    {
        t_symbol *tab_name = atom_getsymbolarg(0, argc, argv);
        if (!(a = (t_garray *)pd_findbyclass(tab_name, garray_class)))
            pd_error(x, "%s: no such array", tab_name->s_name);
        else if (!garray_getfloatwords(a, &vecsize, &vec))
            pd_error(x, "%s: bad template for tabwrite", tab_name->s_name);
        else
        {
            int taille_max = x->nb_link;
            taille_max = min(taille_max, vecsize);
            for (i=0; i < taille_max ; i++)
            {
                vec[i].w_float = x->link[i].mass2->posY - x->link[i].mass1->posY;
            }
            garray_redraw(a);
        }
    }
    else 
    if ( (argc==2) && (argv[0].a_type == A_SYMBOL) && (argv[1].a_type == A_SYMBOL) )
    {
        t_symbol *tab_name = atom_getsymbolarg(0, argc, argv);
        if (!(a = (t_garray *)pd_findbyclass(tab_name, garray_class)))
            pd_error(x, "%s: no such array", tab_name->s_name);
        else if (!garray_getfloatwords(a, &vecsize, &vec))
            pd_error(x, "%s: bad template for tabwrite", tab_name->s_name);
        else
        {    
            i = 0;
            j = 0;
            while ((i < vecsize) && (j < x->nb_link))
            {
                if (atom_getsymbolarg(1,argc,argv) == x->link[j].Id)
                {
                    vec[i].w_float = x->link[j].mass2->posY - x->link[j].mass1->posY;
                    i++;
                }
                j++;
            }
            garray_redraw(a);
        }
    }
}

void pmpd2d_linksPosSpeedYT(t_pmpd2d *x, t_symbol *s, int argc, t_atom *argv)
{
    int i, j, vecsize;
    t_garray *a;
    t_word *vec;
    
    if ( (argc==1) && (argv[0].a_type == A_SYMBOL) )
    {
        t_symbol *tab_name = atom_getsymbolarg(0, argc, argv);
        if (!(a = (t_garray *)pd_findbyclass(tab_name, garray_class)))
            pd_error(x, "%s: no such array", tab_name->s_name);
        else if (!garray_getfloatwords(a, &vecsize, &vec))
            pd_error(x, "%s: bad template for tabwrite", tab_name->s_name);
        else
        {
            int taille_max = x->nb_link;
            taille_max = min(taille_max, vecsize);
            for (i=0; i < taille_max ; i++)
            {
                vec[i].w_float = (x->link[i].mass1->speedY + x->link[i].mass2->speedY)/2;
            }
            garray_redraw(a);
        }
    }
    else 
    if ( (argc==2) && (argv[0].a_type == A_SYMBOL) && (argv[1].a_type == A_SYMBOL) )
    {
        t_symbol *tab_name = atom_getsymbolarg(0, argc, argv);
        if (!(a = (t_garray *)pd_findbyclass(tab_name, garray_class)))
            pd_error(x, "%s: no such array", tab_name->s_name);
        else if (!garray_getfloatwords(a, &vecsize, &vec))
            pd_error(x, "%s: bad template for tabwrite", tab_name->s_name);
        else
        {    
            i = 0;
            j = 0;
            while ((i < vecsize) && (j < x->nb_link))
            {
                if (atom_getsymbolarg(1,argc,argv) == x->link[j].Id)
                {
                    vec[i].w_float = (x->link[j].mass1->speedY + x->link[j].mass2->speedY)/2;
                    i++;
                }
                j++;
            }
            garray_redraw(a);
        }
    }
}

void pmpd2d_linksLengthSpeedYT(t_pmpd2d *x, t_symbol *s, int argc, t_atom *argv)
{
    int i, j, vecsize;
    t_garray *a;
    t_word *vec;
    
    if ( (argc==1) && (argv[0].a_type == A_SYMBOL) )
    {
        t_symbol *tab_name = atom_getsymbolarg(0, argc, argv);
        if (!(a = (t_garray *)pd_findbyclass(tab_name, garray_class)))
            pd_error(x, "%s: no such array", tab_name->s_name);
        else if (!garray_getfloatwords(a, &vecsize, &vec))
            pd_error(x, "%s: bad template for tabwrite", tab_name->s_name);
        else
        {
            int taille_max = x->nb_link;
            taille_max = min(taille_max, vecsize);
            for (i=0; i < taille_max ; i++)
            {
                vec[i].w_float = x->link[i].mass2->speedY - x->link[i].mass1->speedY;
            }
            garray_redraw(a);
        }
    }
    else 
    if ( (argc==2) && (argv[0].a_type == A_SYMBOL) && (argv[1].a_type == A_SYMBOL) )
    {
        t_symbol *tab_name = atom_getsymbolarg(0, argc, argv);
        if (!(a = (t_garray *)pd_findbyclass(tab_name, garray_class)))
            pd_error(x, "%s: no such array", tab_name->s_name);
        else if (!garray_getfloatwords(a, &vecsize, &vec))
            pd_error(x, "%s: bad template for tabwrite", tab_name->s_name);
        else
        {    
            i = 0;
            j = 0;
            while ((i < vecsize) && (j < x->nb_link))
            {
                if (atom_getsymbolarg(1,argc,argv) == x->link[j].Id)
                {
                    vec[i].w_float = x->link[j].mass2->speedY - x->link[j].mass1->speedY;
                    i++;
                }
                j++;
            }
            garray_redraw(a);
        }
    }
}

void pmpd2d_linksPosL(t_pmpd2d *x)
{
    int i;
    t_atom pos_list[2*x->nb_link];

    for (i=0; i < x->nb_link; i++)
    {
        SETFLOAT(&(pos_list[2*i]  ),(x->link[i].mass2->posX + x->link[i].mass1->posX)/2);
        SETFLOAT(&(pos_list[2*i+1]),(x->link[i].mass2->posY + x->link[i].mass1->posY)/2);
    }
    outlet_anything(x->main_outlet, gensym("linksPosL"),2*x->nb_link , pos_list);
}

void pmpd2d_linksLengthL(t_pmpd2d *x)
{
    int i;
    t_atom pos_list[2*x->nb_link];

    for (i=0; i < x->nb_link; i++)
    {
        SETFLOAT(&(pos_list[2*i]  ),x->link[i].mass2->posX - x->link[i].mass1->posX);
        SETFLOAT(&(pos_list[2*i+1]),x->link[i].mass2->posY - x->link[i].mass1->posY);
    }
    outlet_anything(x->main_outlet, gensym("linksLengthL"),2*x->nb_link , pos_list);
}

void pmpd2d_linksPosSpeedL(t_pmpd2d *x)
{
    int i;
    t_atom pos_list[2*x->nb_link];

    for (i=0; i < x->nb_link; i++)
    {
        SETFLOAT(&(pos_list[2*i]  ),(x->link[i].mass2->speedX + x->link[i].mass1->speedX)/2);
        SETFLOAT(&(pos_list[2*i+1]),(x->link[i].mass2->speedY + x->link[i].mass1->speedY)/2);
    }
    outlet_anything(x->main_outlet, gensym("linksPosSpeedL"),3*x->nb_link , pos_list);
}

void pmpd2d_linksLengthSpeedL(t_pmpd2d *x)
{
    int i;
    t_atom pos_list[2*x->nb_link];

    for (i=0; i < x->nb_link; i++)
    {
        SETFLOAT(&(pos_list[2*i]  ),x->link[i].mass2->speedX - x->link[i].mass1->speedX);
        SETFLOAT(&(pos_list[2*i+1]),x->link[i].mass2->speedY - x->link[i].mass1->speedY);
    }
    outlet_anything(x->main_outlet, gensym("linksLengthSpeedL"),2*x->nb_link , pos_list);
}

void pmpd2d_linksPosT(t_pmpd2d *x, t_symbol *s, int argc, t_atom *argv)
{
    int i, j, vecsize;
    t_garray *a;
    t_word *vec;
    
    if ( (argc==1) && (argv[0].a_type == A_SYMBOL) )
    {
        t_symbol *tab_name = atom_getsymbolarg(0, argc, argv);
        if (!(a = (t_garray *)pd_findbyclass(tab_name, garray_class)))
            pd_error(x, "%s: no such array", tab_name->s_name);
        else if (!garray_getfloatwords(a, &vecsize, &vec))
            pd_error(x, "%s: bad template for tabwrite", tab_name->s_name);
        else
        {
            int taille_max = x->nb_link;
            taille_max = min(taille_max, (vecsize-2)/2);
            for (i=0; i < taille_max ; i++)
            {
                vec[2*i  ].w_float = (x->link[i].mass2->posX + x->link[i].mass1->posX)/2;
                vec[2*i+1].w_float = (x->link[i].mass2->posY + x->link[i].mass1->posY)/2;
            }
            garray_redraw(a);
        }
    }
    else 
    if ( (argc==2) && (argv[0].a_type == A_SYMBOL) && (argv[1].a_type == A_SYMBOL) )
    {
        t_symbol *tab_name = atom_getsymbolarg(0, argc, argv);
        if (!(a = (t_garray *)pd_findbyclass(tab_name, garray_class)))
            pd_error(x, "%s: no such array", tab_name->s_name);
        else if (!garray_getfloatwords(a, &vecsize, &vec))
            pd_error(x, "%s: bad template for tabwrite", tab_name->s_name);
        else
        {    
            i = 0;
            j = 0;
            while ((i < vecsize-2) && (j < x->nb_link))
            {
                if (atom_getsymbolarg(1,argc,argv) == x->link[j].Id)
                {
                    vec[i].w_float = (x->link[j].mass2->posX + x->link[j].mass1->posX)/2;
                    i++;
                    vec[i].w_float = (x->link[j].mass2->posY + x->link[j].mass1->posY)/2;
                    i++;
                }
                j++;
            }
            garray_redraw(a);
        }
    }
}

void pmpd2d_linksLengthT(t_pmpd2d *x, t_symbol *s, int argc, t_atom *argv)
{
    int i, j, vecsize;
    t_garray *a;
    t_word *vec;
    
    if ( (argc==1) && (argv[0].a_type == A_SYMBOL) )
    {
        t_symbol *tab_name = atom_getsymbolarg(0, argc, argv);
        if (!(a = (t_garray *)pd_findbyclass(tab_name, garray_class)))
            pd_error(x, "%s: no such array", tab_name->s_name);
        else if (!garray_getfloatwords(a, &vecsize, &vec))
            pd_error(x, "%s: bad template for tabwrite", tab_name->s_name);
        else
        {
            int taille_max = x->nb_link;
            taille_max = min(taille_max, (vecsize-2)/2);
            for (i=0; i < taille_max ; i++)
            {
                vec[2*i  ].w_float = x->link[i].mass2->posX - x->link[i].mass1->posX;
                vec[2*i+1].w_float = x->link[i].mass2->posY - x->link[i].mass1->posY;
            }
            garray_redraw(a);
        }
    }
    else 
    if ( (argc==2) && (argv[0].a_type == A_SYMBOL) && (argv[1].a_type == A_SYMBOL) )
    {
        t_symbol *tab_name = atom_getsymbolarg(0, argc, argv);
        if (!(a = (t_garray *)pd_findbyclass(tab_name, garray_class)))
            pd_error(x, "%s: no such array", tab_name->s_name);
        else if (!garray_getfloatwords(a, &vecsize, &vec))
            pd_error(x, "%s: bad template for tabwrite", tab_name->s_name);
        else
        {    
            i = 0;
            j = 0;
            while ((i < vecsize-2) && (j < x->nb_link))
            {
                if (atom_getsymbolarg(1,argc,argv) == x->link[j].Id)
                {
                    vec[i].w_float = x->link[j].mass2->posX + x->link[j].mass1->posX;
                    i++;
                    vec[i].w_float = x->link[j].mass2->posY + x->link[j].mass1->posY;
                    i++;
                }
                j++;
            }
            garray_redraw(a);
        }
    }
}

void pmpd2d_linksPosSpeedT(t_pmpd2d *x, t_symbol *s, int argc, t_atom *argv)
{
    int i, j, vecsize;
    t_garray *a;
    t_word *vec;
    
    if ( (argc==1) && (argv[0].a_type == A_SYMBOL) )
    {
        t_symbol *tab_name = atom_getsymbolarg(0, argc, argv);
        if (!(a = (t_garray *)pd_findbyclass(tab_name, garray_class)))
            pd_error(x, "%s: no such array", tab_name->s_name);
        else if (!garray_getfloatwords(a, &vecsize, &vec))
            pd_error(x, "%s: bad template for tabwrite", tab_name->s_name);
        else
        {
            int taille_max = x->nb_link;
            taille_max = min(taille_max, (vecsize-2)/2);
            for (i=0; i < taille_max ; i++)
            {
                vec[2*i  ].w_float = (x->link[i].mass2->speedX + x->link[i].mass1->speedX)/2;
                vec[2*i+1].w_float = (x->link[i].mass2->speedY + x->link[i].mass1->speedY)/2;
            }
            garray_redraw(a);
        }
    }
    else 
    if ( (argc==2) && (argv[0].a_type == A_SYMBOL) && (argv[1].a_type == A_SYMBOL) )
    {
        t_symbol *tab_name = atom_getsymbolarg(0, argc, argv);
        if (!(a = (t_garray *)pd_findbyclass(tab_name, garray_class)))
            pd_error(x, "%s: no such array", tab_name->s_name);
        else if (!garray_getfloatwords(a, &vecsize, &vec))
            pd_error(x, "%s: bad template for tabwrite", tab_name->s_name);
        else
        {    
            i = 0;
            j = 0;
            while ((i < vecsize-2) && (j < x->nb_link))
            {
                if (atom_getsymbolarg(1,argc,argv) == x->link[j].Id)
                {
                    vec[i].w_float = (x->link[j].mass2->speedX + x->link[j].mass1->speedX)/2;
                    i++;
                    vec[i].w_float = (x->link[j].mass2->speedY + x->link[j].mass1->speedY)/2;
                    i++;
                }
                j++;
            }
            garray_redraw(a);
        }
    }
}

void pmpd2d_linksLengthSpeedT(t_pmpd2d *x, t_symbol *s, int argc, t_atom *argv)
{
    int i, j, vecsize;
    t_garray *a;
    t_word *vec;
    
    if ( (argc==1) && (argv[0].a_type == A_SYMBOL) )
    {
        t_symbol *tab_name = atom_getsymbolarg(0, argc, argv);
        if (!(a = (t_garray *)pd_findbyclass(tab_name, garray_class)))
            pd_error(x, "%s: no such array", tab_name->s_name);
        else if (!garray_getfloatwords(a, &vecsize, &vec))
            pd_error(x, "%s: bad template for tabwrite", tab_name->s_name);
        else
        {
            int taille_max = x->nb_link;
            taille_max = min(taille_max, (vecsize-2)/2);
            for (i=0; i < taille_max ; i++)
            {
                vec[2*i  ].w_float = x->link[i].mass2->speedX - x->link[i].mass1->speedX;
                vec[2*i+1].w_float = x->link[i].mass2->speedY - x->link[i].mass1->speedY;
            }
            garray_redraw(a);
        }
    }
    else 
    if ( (argc==2) && (argv[0].a_type == A_SYMBOL) && (argv[1].a_type == A_SYMBOL) )
    {
        t_symbol *tab_name = atom_getsymbolarg(0, argc, argv);
        if (!(a = (t_garray *)pd_findbyclass(tab_name, garray_class)))
            pd_error(x, "%s: no such array", tab_name->s_name);
        else if (!garray_getfloatwords(a, &vecsize, &vec))
            pd_error(x, "%s: bad template for tabwrite", tab_name->s_name);
        else
        {    
            i = 0;
            j = 0;
            while ((i < vecsize-2) && (j < x->nb_link))
            {
                if (atom_getsymbolarg(1,argc,argv) == x->link[j].Id)
                {
                    vec[i].w_float = x->link[j].mass2->speedX + x->link[j].mass1->speedX;
                    i++;
                    vec[i].w_float = x->link[j].mass2->speedY + x->link[j].mass1->speedY;
                    i++;
                }
                j++;
            }
            garray_redraw(a);
        }
    }
}

void pmpd2d_linksPosNormL(t_pmpd2d *x)
{
    int i;
    t_atom pos_list[x->nb_link];

    for (i=0; i < x->nb_link; i++)
    {
        SETFLOAT(&(pos_list[i]),sqrt( \
                            sqr((x->link[i].mass1->posX + x->link[i].mass2->posX)/2) + \
                            sqr((x->link[i].mass1->posY + x->link[i].mass2->posY)/2) ));
    }
    outlet_anything(x->main_outlet, gensym("linksPosNormL"),x->nb_link , pos_list);
}

void pmpd2d_linksLengthNormL(t_pmpd2d *x)
{
    int i;
    t_atom pos_list[x->nb_link];

    for (i=0; i < x->nb_link; i++)
    {
        SETFLOAT(&(pos_list[i]),sqrt( \
                            sqr(x->link[i].mass2->posX - x->link[i].mass1->posX) + \
                            sqr(x->link[i].mass2->posY - x->link[i].mass1->posY)  ));
    }
    outlet_anything(x->main_outlet, gensym("linksLengthNormL"),x->nb_link , pos_list);
}

void pmpd2d_linksPosSpeedNormL(t_pmpd2d *x)
{
    int i;
    t_atom pos_list[x->nb_link];

    for (i=0; i < x->nb_link; i++)
    {
        SETFLOAT(&(pos_list[i]),sqrt( \
                            sqr((x->link[i].mass1->speedX + x->link[i].mass2->speedX)/2) + \
                            sqr((x->link[i].mass1->speedY + x->link[i].mass2->speedY)/2)  ));
    }
    outlet_anything(x->main_outlet, gensym("linksPosSpeedNormL"),x->nb_link , pos_list);
}

void pmpd2d_linksLengthSpeedNormL(t_pmpd2d *x)
{
    int i;
    t_atom pos_list[x->nb_link];

    for (i=0; i < x->nb_link; i++)
    {
        SETFLOAT(&(pos_list[i]),sqrt( \
                            sqr(x->link[i].mass2->speedX - x->link[i].mass1->speedX) + \
                            sqr(x->link[i].mass2->speedY - x->link[i].mass1->speedY) ));
    }
    outlet_anything(x->main_outlet, gensym("linksLengthSpeedNormL"),x->nb_link , pos_list);
}

void pmpd2d_linksPosNormT(t_pmpd2d *x, t_symbol *s, int argc, t_atom *argv)
{
    int i, j, vecsize;
    t_garray *a;
    t_word *vec;
    
    if ( (argc==1) && (argv[0].a_type == A_SYMBOL) )
    {
        t_symbol *tab_name = atom_getsymbolarg(0, argc, argv);
        if (!(a = (t_garray *)pd_findbyclass(tab_name, garray_class)))
            pd_error(x, "%s: no such array", tab_name->s_name);
        else if (!garray_getfloatwords(a, &vecsize, &vec))
            pd_error(x, "%s: bad template for tabwrite", tab_name->s_name);
        else
        {
            int taille_max = x->nb_link;
            taille_max = min(taille_max, vecsize);
            for (i=0; i < taille_max ; i++)
            {
                vec[i].w_float = sqrt( \
                            sqr((x->link[i].mass1->posX + x->link[i].mass2->posX)/2) + \
                            sqr((x->link[i].mass1->posY + x->link[i].mass2->posY)/2) );
            }
            garray_redraw(a);
        }
    }
    else 
    if ( (argc==2) && (argv[0].a_type == A_SYMBOL) && (argv[1].a_type == A_SYMBOL) )
    {
        t_symbol *tab_name = atom_getsymbolarg(0, argc, argv);
        if (!(a = (t_garray *)pd_findbyclass(tab_name, garray_class)))
            pd_error(x, "%s: no such array", tab_name->s_name);
        else if (!garray_getfloatwords(a, &vecsize, &vec))
            pd_error(x, "%s: bad template for tabwrite", tab_name->s_name);
        else
        {    
            i = 0;
            j = 0;
            while ((i < vecsize) && (j < x->nb_link))
            {
                if (atom_getsymbolarg(1,argc,argv) == x->link[j].Id)
                {
                    vec[j].w_float = sqrt( \
                            sqr((x->link[j].mass1->posX + x->link[j].mass2->posX)/2) + \
                            sqr((x->link[j].mass1->posY + x->link[j].mass2->posY)/2) );
                    i++;
                }
                j++;
            }
            garray_redraw(a);
        }
    }
}

void pmpd2d_linksLengthNormT(t_pmpd2d *x, t_symbol *s, int argc, t_atom *argv)
{
    int i, j, vecsize;
    t_garray *a;
    t_word *vec;
    
    if ( (argc==1) && (argv[0].a_type == A_SYMBOL) )
    {
        t_symbol *tab_name = atom_getsymbolarg(0, argc, argv);
        if (!(a = (t_garray *)pd_findbyclass(tab_name, garray_class)))
            pd_error(x, "%s: no such array", tab_name->s_name);
        else if (!garray_getfloatwords(a, &vecsize, &vec))
            pd_error(x, "%s: bad template for tabwrite", tab_name->s_name);
        else
        {
            int taille_max = x->nb_link;
            taille_max = min(taille_max, vecsize);
            for (i=0; i < taille_max ; i++)
            {
                vec[i].w_float = sqrt( \
                            sqr(x->link[i].mass2->posX - x->link[i].mass1->posX) + \
                            sqr(x->link[i].mass2->posY - x->link[i].mass1->posY) );
            }
            garray_redraw(a);
        }
    }
    else 
    if ( (argc==2) && (argv[0].a_type == A_SYMBOL) && (argv[1].a_type == A_SYMBOL) )
    {
        t_symbol *tab_name = atom_getsymbolarg(0, argc, argv);
        if (!(a = (t_garray *)pd_findbyclass(tab_name, garray_class)))
            pd_error(x, "%s: no such array", tab_name->s_name);
        else if (!garray_getfloatwords(a, &vecsize, &vec))
            pd_error(x, "%s: bad template for tabwrite", tab_name->s_name);
        else
        {    
            i = 0;
            j = 0;
            while ((i < vecsize) && (j < x->nb_link))
            {
                if (atom_getsymbolarg(1,argc,argv) == x->link[j].Id)
                {
                    vec[i].w_float = sqrt( \
                            sqr(x->link[j].mass2->posX - x->link[j].mass1->posX) + \
                            sqr(x->link[j].mass2->posY - x->link[j].mass1->posY) );
                    i++;
                }
                j++;
            }
            garray_redraw(a);
        }
    }
}

void pmpd2d_linksPosSpeedNormT(t_pmpd2d *x, t_symbol *s, int argc, t_atom *argv)
{
    int i, j, vecsize;
    t_garray *a;
    t_word *vec;
    
    if ( (argc==1) && (argv[0].a_type == A_SYMBOL) )
    {
        t_symbol *tab_name = atom_getsymbolarg(0, argc, argv);
        if (!(a = (t_garray *)pd_findbyclass(tab_name, garray_class)))
            pd_error(x, "%s: no such array", tab_name->s_name);
        else if (!garray_getfloatwords(a, &vecsize, &vec))
            pd_error(x, "%s: bad template for tabwrite", tab_name->s_name);
        else
        {
            int taille_max = x->nb_link;
            taille_max = min(taille_max, vecsize);
            for (i=0; i < taille_max ; i++)
            {
                vec[i].w_float = sqrt( \
                            sqr((x->link[i].mass1->speedX + x->link[i].mass2->speedX)/2) + \
                            sqr((x->link[i].mass1->speedY + x->link[i].mass2->speedY)/2) );
            }
            garray_redraw(a);
        }
    }
    else 
    if ( (argc==2) && (argv[0].a_type == A_SYMBOL) && (argv[1].a_type == A_SYMBOL) )
    {
        t_symbol *tab_name = atom_getsymbolarg(0, argc, argv);
        if (!(a = (t_garray *)pd_findbyclass(tab_name, garray_class)))
            pd_error(x, "%s: no such array", tab_name->s_name);
        else if (!garray_getfloatwords(a, &vecsize, &vec))
            pd_error(x, "%s: bad template for tabwrite", tab_name->s_name);
        else
        {    
            i = 0;
            j = 0;
            while ((i < vecsize) && (j < x->nb_link))
            {
                if (atom_getsymbolarg(1,argc,argv) == x->link[j].Id)
                {
                    vec[i].w_float = sqrt( \
                            sqr((x->link[j].mass1->speedX + x->link[j].mass2->speedX)/2) + \
                            sqr((x->link[j].mass1->speedY + x->link[j].mass2->speedY)/2) );
                    i++;
                }
                j++;
            }
            garray_redraw(a);
        }
    }
}

void pmpd2d_linksLengthSpeedNormT(t_pmpd2d *x, t_symbol *s, int argc, t_atom *argv)
{
    int i, j, vecsize;
    t_garray *a;
    t_word *vec;
    
    if ( (argc==1) && (argv[0].a_type == A_SYMBOL) )
    {
        t_symbol *tab_name = atom_getsymbolarg(0, argc, argv);
        if (!(a = (t_garray *)pd_findbyclass(tab_name, garray_class)))
            pd_error(x, "%s: no such array", tab_name->s_name);
        else if (!garray_getfloatwords(a, &vecsize, &vec))
            pd_error(x, "%s: bad template for tabwrite", tab_name->s_name);
        else
        {
            int taille_max = x->nb_link;
            taille_max = min(taille_max, vecsize);
            for (i=0; i < taille_max ; i++)
            {
                vec[i].w_float = sqrt( \
                            sqr(x->link[i].mass2->speedX - x->link[i].mass1->speedX) + \
                            sqr(x->link[i].mass2->speedY - x->link[i].mass1->speedY) );
            }
            garray_redraw(a);
        }
    }
    else 
    if ( (argc==2) && (argv[0].a_type == A_SYMBOL) && (argv[1].a_type == A_SYMBOL) )
    {
        t_symbol *tab_name = atom_getsymbolarg(0, argc, argv);
        if (!(a = (t_garray *)pd_findbyclass(tab_name, garray_class)))
            pd_error(x, "%s: no such array", tab_name->s_name);
        else if (!garray_getfloatwords(a, &vecsize, &vec))
            pd_error(x, "%s: bad template for tabwrite", tab_name->s_name);
        else
        {    
            i = 0;
            j = 0;
            while ((i < vecsize) && (j < x->nb_link))
            {
                if (atom_getsymbolarg(1,argc,argv) == x->link[j].Id)
                {
                    vec[i].w_float = sqrt( \
                            sqr(x->link[j].mass2->speedX - x->link[j].mass1->speedX) + \
                            sqr(x->link[j].mass2->speedY - x->link[j].mass1->speedY) );
                    i++;
                }
                j++;
            }
            garray_redraw(a);
        }
    }
}


void pmpd2d_linksEndT(t_pmpd2d *x, t_symbol *s, int argc, t_atom *argv)
{
    int i, j, vecsize;
    t_garray *a;
    t_word *vec;
    
    if ( (argc==1) && (argv[0].a_type == A_SYMBOL) )
    {
        t_symbol *tab_name = atom_getsymbolarg(0, argc, argv);
        if (!(a = (t_garray *)pd_findbyclass(tab_name, garray_class)))
            pd_error(x, "%s: no such array", tab_name->s_name);
        else if (!garray_getfloatwords(a, &vecsize, &vec))
            pd_error(x, "%s: bad template for tabwrite", tab_name->s_name);
        else
        {
            int taille_max = x->nb_link;
            taille_max = min(taille_max, (vecsize-3)/4);
            for (i=0; i < taille_max ; i++)
            {
                vec[4*i  ].w_float = x->link[i].mass1->posX;
                vec[4*i+1].w_float = x->link[i].mass1->posY;
                vec[4*i+2].w_float = x->link[i].mass2->posX;
                vec[4*i+3].w_float = x->link[i].mass2->posY;
            }
            garray_redraw(a);
        }
    }
    else 
    if ( (argc==2) && (argv[0].a_type == A_SYMBOL) && (argv[1].a_type == A_SYMBOL) )
    {
        t_symbol *tab_name = atom_getsymbolarg(0, argc, argv);
        if (!(a = (t_garray *)pd_findbyclass(tab_name, garray_class)))
            pd_error(x, "%s: no such array", tab_name->s_name);
        else if (!garray_getfloatwords(a, &vecsize, &vec))
            pd_error(x, "%s: bad template for tabwrite", tab_name->s_name);
        else
        {    
            i = 0;
            j = 0;
            while ((i < vecsize-3) && (j < x->nb_link))
            {
                if (atom_getsymbolarg(1,argc,argv) == x->link[j].Id)
                {
                    vec[i].w_float = x->link[j].mass1->posX;
                    i++;
                    vec[i].w_float = x->link[j].mass1->posY;
                    i++;
                    vec[i].w_float = x->link[j].mass2->posX;
                    i++;
                    vec[i].w_float = x->link[j].mass2->posY;
                    i++;
                }
                j++;
            }
            garray_redraw(a);
        }
    }
}

//----------------------------------------------

void pmpd2d_grabMass(t_pmpd2d *x, t_float posX, t_float posY, t_float grab)
{
    t_float dist, tmp;
    t_int i;
    
    if (grab == 0)
        x->grab=0;
    if ((x->grab == 0)&(grab == 1)&(x->nb_mass > 0))
    {
        x->grab=1;
        x->grab_nb= 0;
        dist = sqr(x->mass[0].posX - posX) + sqr(x->mass[0].posY - posY);
        for (i=1; i<x->nb_mass; i++)
        {
            tmp = sqr(x->mass[i].posX - posX) + sqr(x->mass[i].posY - posY);
            if (tmp < dist)
            {
                dist = tmp;
                x->grab_nb= i;
            }
        }
    }
    if (x->grab == 1)
    {
        x->mass[x->grab_nb].posX = posX;
        x->mass[x->grab_nb].posY = posY;        
    }
}

void pmpd2d_closestMass(t_pmpd2d *x, t_symbol *s, int argc, t_atom *argv)// t_float posX, t_float posY)
{
    t_float dist, tmp;
    t_int i;
    t_atom std_out[3];
    
    t_float posX, posY;
    posX = atom_getfloatarg(0, argc, argv);
    posY = atom_getfloatarg(1, argc, argv);    
    if ( (argc == 3)  && (argv[2].a_type == A_SYMBOL) )
    {
        //t_symbol *mass_name = atom_getsymbolarg(2, argc, argv);
        if ((x->nb_mass > 0))
        {
            dist = 1000000000;//sqr(x->mass[0].posX - posX) + sqr(x->mass[0].posY - posY);
            for (i=0; i<x->nb_mass; i++)
            {
                if (atom_getsymbolarg(2,argc,argv) == x->mass[i].Id)
                {
                    tmp = sqr(x->mass[i].posX - posX) + sqr(x->mass[i].posY - posY);
                    if (tmp < dist)
                    {
                        dist = tmp;
                        x->grab_nb= i;
                    }
                }
            }
        }
    }
    else {
        if ((x->nb_mass > 0))
        {
            dist = sqr(x->mass[0].posX - posX) + sqr(x->mass[0].posY - posY);
            for (i=1; i<x->nb_mass; i++)
            {
                tmp = sqr(x->mass[i].posX - posX) + sqr(x->mass[i].posY - posY);
                if (tmp < dist)
                {
                    dist = tmp;
                    x->grab_nb= i;
                }
            }
        }
    }
    
        
    SETFLOAT(&(std_out[0]),x->grab_nb);
    SETFLOAT(&(std_out[1]), x->mass[x->grab_nb].posX);
    SETFLOAT(&(std_out[2]), x->mass[x->grab_nb].posY);
    outlet_anything(x->main_outlet, gensym("closestMass"),3,std_out);

}

void *pmpd2d_new()
{
    t_pmpd2d *x = (t_pmpd2d *)pd_new(pmpd2d_class);

    pmpd2d_reset(x);
    
    x->main_outlet=outlet_new(&x->x_obj, 0);
    // x->info_outlet=outlet_new(&x->x_obj, 0); // TODO

    return (void *)x;
}

void pmpd2d_setup(void) 
{
 pmpd2d_class = class_new(gensym("pmpd2d"),
        (t_newmethod)pmpd2d_new,
        0, sizeof(t_pmpd2d),CLASS_DEFAULT, 0);

    class_addbang(pmpd2d_class, pmpd2d_bang);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_reset,           gensym("reset"), 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_infosL,          gensym("infosL"), 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_infosL,          gensym("print"), 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_mass,            gensym("mass"), A_DEFSYMBOL, A_DEFFLOAT, A_DEFFLOAT, A_DEFFLOAT, A_DEFFLOAT, 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_link,            gensym("link"), A_GIMME, 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_tabLink,         gensym("tabLink"), A_GIMME, 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_tLink,           gensym("tLink"), A_GIMME, 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_setK,            gensym("setK"), A_GIMME, 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_setD,            gensym("setD"), A_GIMME, 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_setL,            gensym("setL"), A_GIMME, 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_setLKTab,        gensym("setLKTab"), A_GIMME, 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_setLDTab,        gensym("setLDTab"), A_GIMME, 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_setLinkId,       gensym("setLinkId"), A_GIMME, 0);

    class_addmethod(pmpd2d_class, (t_method)pmpd2d_setMassId,       gensym("setMassId"), A_GIMME, 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_pos,             gensym("pos"), A_GIMME, 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_posX,            gensym("posX"), A_GIMME, 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_posY,            gensym("posY"), A_GIMME, 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_force,           gensym("force"), A_GIMME, 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_forceX,          gensym("forceX"), A_GIMME, 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_forceY,          gensym("forceY"), A_GIMME, 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_minX,            gensym("Xmin"), A_DEFFLOAT, 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_maxX,            gensym("Xmax"), A_DEFFLOAT, 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_minY,            gensym("Ymin"), A_DEFFLOAT, 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_maxY,            gensym("Ymax"), A_DEFFLOAT, 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_min,             gensym("min"), A_DEFFLOAT, A_DEFFLOAT, 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_max,             gensym("max"), A_DEFFLOAT, A_DEFFLOAT, 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_setFixed,        gensym("setFixed"), A_GIMME, 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_setMobile,       gensym("setMobile"), A_GIMME, 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_setD2,           gensym("setDEnv"), A_GIMME, 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_setD2offset,     gensym("setDEnvOffset"), A_GIMME, 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_setSpeed,        gensym("setSpeed"), A_GIMME, 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_setSpeedX,       gensym("setSpeedX"), A_GIMME, 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_setSpeedY,       gensym("setSpeedY"), A_GIMME, 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_setForce,        gensym("setForce"), A_GIMME, 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_setForceX,       gensym("setForceX"), A_GIMME, 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_setForceY,       gensym("setForceY"), A_GIMME, 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_addPos,          gensym("addPos"), A_GIMME, 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_addPosX,         gensym("addPosX"), A_GIMME, 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_addPosY,         gensym("addPosY"), A_GIMME, 0);

    class_addmethod(pmpd2d_class, (t_method)pmpd2d_get,             gensym("get"), A_GIMME, 0);
    
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_massesPosL,      gensym("massesPosL"), 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_massesSpeedsL,   gensym("massesSpeedsL"), 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_massesForcesL,   gensym("massesForcesL"), 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_massesPosT,      gensym("massesPosT"), A_GIMME, 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_massesSpeedsT,   gensym("massesSpeedsT"),A_GIMME, 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_massesForcesT,   gensym("massesForcesT"),A_GIMME, 0);
    
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_massesPosXL,     gensym("massesPosXL"), 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_massesSpeedsXL,  gensym("massesSpeedsXL"), 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_massesForcesXL,  gensym("massesForcesXL"), 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_massesPosXT,     gensym("massesPosXT"), A_GIMME, 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_massesSpeedsXT,  gensym("massesSpeedsXT"),A_GIMME, 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_massesForcesXT,  gensym("massesForcesXT"),A_GIMME, 0);
    
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_massesPosYL,     gensym("massesPosYL"), 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_massesSpeedsYL,  gensym("massesSpeedsYL"), 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_massesForcesYL,  gensym("massesForcesYL"), 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_massesPosYT,     gensym("massesPosYT"), A_GIMME, 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_massesSpeedsYT,  gensym("massesSpeedsYT"),A_GIMME, 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_massesForcesYT,  gensym("massesForcesYT"),A_GIMME, 0);
    
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_massesPosNormL,      gensym("massesPosNormL"), 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_massesSpeedsNormL,   gensym("massesSpeedsNormL"), 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_massesForcesNormL,   gensym("massesForcesNormL"), 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_massesPosNormT,      gensym("massesPosNormT"),  A_GIMME, 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_massesSpeedsNormT,   gensym("massesSpeedsNormT"), A_GIMME, 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_massesForcesNormT,   gensym("massesForcesNormT"), A_GIMME, 0);
    
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_massesPosMean,       gensym("massesPosMean"), A_GIMME, 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_massesPosStd,        gensym("massesPosStd"),A_GIMME, 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_massesForcesMean,    gensym("massesForcesMean"), A_GIMME, 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_massesForcesStd,     gensym("massesForcesStd"),A_GIMME, 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_massesSpeedsMean,    gensym("massesSpeedsMean"), A_GIMME, 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_massesSpeedsStd,     gensym("massesSpeedsStd"),A_GIMME, 0);

    class_addmethod(pmpd2d_class, (t_method)pmpd2d_linksPosXL,               gensym("linksPosXL"), A_GIMME, 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_linksLengthXL,           gensym("linksLengthXL"), A_GIMME, 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_linksPosSpeedXL,        gensym("linksPosSpeedXL"), A_GIMME, 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_linksLengthSpeedXL,    gensym("linksLengthSpeedXL"), A_GIMME, 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_linksPosXT,               gensym("linksPosXT"), A_GIMME, 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_linksLengthXT,           gensym("linksLengthXT"), A_GIMME, 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_linksPosSpeedXT,        gensym("linksPosSpeedXT"), A_GIMME, 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_linksLengthSpeedXT,    gensym("linksLengthSpeedXT"), A_GIMME, 0);
    
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_linksPosYL,               gensym("linksPosYL"), A_GIMME, 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_linksLengthYL,           gensym("linksLengthYL"), A_GIMME, 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_linksPosSpeedYL,        gensym("linksPosSpeedYL"), A_GIMME, 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_linksLengthSpeedYL,    gensym("linksLengthSpeedYL"), A_GIMME, 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_linksPosYT,               gensym("linksPosYT"), A_GIMME, 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_linksLengthYT,           gensym("linksLengthYT"), A_GIMME, 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_linksPosSpeedYT,        gensym("linksPosSpeedYT"), A_GIMME, 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_linksLengthSpeedYT,    gensym("linksLengthSpeedYT"), A_GIMME, 0);

    class_addmethod(pmpd2d_class, (t_method)pmpd2d_linksPosL,               gensym("linksPosL"), A_GIMME, 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_linksLengthL,           gensym("linksLengthL"), A_GIMME, 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_linksPosSpeedL,        gensym("linksPosSpeedL"), A_GIMME, 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_linksLengthSpeedL,    gensym("linksLengthSpeedL"), A_GIMME, 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_linksPosT,               gensym("linksPosT"), A_GIMME, 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_linksLengthT,           gensym("linksLengthT"), A_GIMME, 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_linksPosSpeedT,        gensym("linksPosSpeedT"), A_GIMME, 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_linksLengthSpeedT,    gensym("linksLengthSpeedT"), A_GIMME, 0);

    class_addmethod(pmpd2d_class, (t_method)pmpd2d_linksPosNormL,               gensym("linksPosNormL"), A_GIMME, 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_linksLengthNormL,           gensym("linksLengthNormL"), A_GIMME, 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_linksPosSpeedNormL,        gensym("linksPosSpeedNormL"), A_GIMME, 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_linksLengthSpeedNormL,    gensym("linksLengthSpeedNormL"), A_GIMME, 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_linksPosNormT,               gensym("linksPosNormT"), A_GIMME, 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_linksLengthNormT,           gensym("linksLengthNormT"), A_GIMME, 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_linksPosSpeedNormT,        gensym("linksPosSpeedNormT"), A_GIMME, 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_linksLengthSpeedNormT,    gensym("linksLengthSpeedNormT"), A_GIMME, 0);
    
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_linksEndT,               gensym("linksEndT"),   A_GIMME, 0);
/*    class_addmethod(pmpd2d_class, (t_method)pmpd2d_linksEnd1T,               gensym("linksEnd1T"),  A_GIMME, 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_linksEnd2T,               gensym("linksEnd2T"),  A_GIMME, 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_linksEndXT,               gensym("linksEndXT"),  A_GIMME, 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_linksEnd1XT,               gensym("linksEnd1XT"), A_GIMME, 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_linksEnd2XT,               gensym("linksEnd2XT"), A_GIMME, 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_linksEndYT,               gensym("linksEndYT"),  A_GIMME, 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_linksEnd1YT,               gensym("linksEnd1YT"), A_GIMME, 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_linksEnd2YT,               gensym("linksEnd2YT"), A_GIMME, 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_linksEndZT,               gensym("linksEndZT"),  A_GIMME, 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_linksEnd1ZT,               gensym("linksEnd1ZT"), A_GIMME, 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_linksEnd2ZT,               gensym("linksEnd2ZT"), A_GIMME, 0);
*/

/*    class_addmethod(pmpd2d_class, (t_method)pmpd2d_linksPosMean,               gensym("linksPosMean"), A_GIMME, 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_linksLengthMean,               gensym("linksLengthMean"), A_GIMME, 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_linksPosSpeedMean,        gensym("linksPosSpeedMean"), A_GIMME, 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_linksLengthSpeedMean,    gensym("linksLengthSpeedMean"), A_GIMME, 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_linksPosStd,                   gensym("linksPosStd"), A_GIMME, 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_linksLengthStd,               gensym("linksLengthStd"), A_GIMME, 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_linksPosSpeedStd,        gensym("linksPosSpeedStd"), A_GIMME, 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_linksLengthSpeedStd0,    gensym("linksLengthSpeedStd"), A_GIMME, 0);
*/

    class_addmethod(pmpd2d_class, (t_method)pmpd2d_grabMass,        gensym("grabMass"), A_DEFFLOAT, A_DEFFLOAT, A_DEFFLOAT, 0);
    class_addmethod(pmpd2d_class, (t_method)pmpd2d_closestMass,        gensym("closestMass"), A_GIMME, 0);

}