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#include "m_pd.h"
#include "math.h"
static t_class *tSeg2D_class;
typedef struct _tSeg2D {
t_object x_obj;
t_float X1, X2, Y1, Y2, P, P_old;
t_outlet *force_new, *profondeur, *vitesse;// outlet
} t_tSeg2D;
void tSeg2D_position2D(t_tSeg2D *x, t_float X, t_float Y)
{
t_float a1, b1, c1, a2, b2, c2, a3, b3, c3, profondeur, tmp;
b1 = x->X2 - x->X1;
a1 = -x->Y2 + x->Y1;
if (!((a1==0) & (b1==0)))
{
tmp = sqrt((a1*a1)+(b1*b1)); // = longueur du vecteur pour renormalisation
a1 = a1/tmp;
b1 = b1/tmp;
c1 = a1*x->X1+b1*x->Y1;
profondeur = ( (a1 * X) + (b1 * Y) ) - c1;
tmp = profondeur - x->P_old;
x->P_old = profondeur;
a2 = b1;
b2 = -a1;
c2 = a2*x->X1+b2*x->Y1;
a3 = a2;
b3 = b2;
c3 = a3*x->X2+b3*x->Y2;
outlet_float(x->vitesse, tmp);
outlet_float(x->profondeur, profondeur);
if ( ( profondeur < 0) & (profondeur > - x->P) & (( (a2 * X) + (b2 * Y) ) > c2) & ( ((a3 * X) + (b3 * Y) ) < c3) )
{
outlet_float(x->force_new, 1);
}
else
{
outlet_float(x->force_new, 0);
}
}
else
{
outlet_float(x->force_new, 0);
}
}
void tSeg2D_Xmin(t_tSeg2D *x, t_float X)
{
x->X1= X;
}
void tSeg2D_Xmax(t_tSeg2D *x, t_float X)
{
x->X2= X;
}
void tSeg2D_Ymin(t_tSeg2D *x, t_float X)
{
x->Y1= X;
}
void tSeg2D_Ymax(t_tSeg2D *x, t_float X)
{
x->Y2= X;
}
void tSeg2D_P(t_tSeg2D *x, t_float X)
{
x->P= X;
}
void *tSeg2D_new(t_symbol *s, int argc, t_atom *argv)
{
t_tSeg2D *x = (t_tSeg2D *)pd_new(tSeg2D_class);
x->force_new = outlet_new(&x->x_obj, 0);
x->profondeur =outlet_new(&x->x_obj, 0);
x->vitesse = outlet_new(&x->x_obj, 0);
x->P_old = 0;
if (argc>=5)
x->P = atom_getfloatarg(4, argc, argv);
else
x->P = 1;
if (argc>=4)
x->Y2 = atom_getfloatarg(3, argc, argv);
else
x->Y2 = 0;
if (argc>=3)
x->X2 = atom_getfloatarg(2, argc, argv);
else
x->X2 = 1;
if (argc>=2)
x->Y1 = atom_getfloatarg(1, argc, argv);
else
x->Y1 = 0;
if (argc>=1)
x->X1 = atom_getfloatarg(0, argc, argv);
else
x->X1 = -1;
return (x);
}
void tSeg2D_setup(void)
{
tSeg2D_class = class_new(gensym("tSeg2D"),
(t_newmethod)tSeg2D_new,
0, sizeof(t_tSeg2D),
CLASS_DEFAULT, A_GIMME, 0);
class_addcreator((t_newmethod)tSeg2D_new, gensym("pmpd.tSeg2D"), A_GIMME, 0);
class_addmethod(tSeg2D_class, (t_method)tSeg2D_position2D, gensym("position2D"), A_DEFFLOAT, A_DEFFLOAT, 0);
class_addmethod(tSeg2D_class, (t_method)tSeg2D_Xmin, gensym("setX1"), A_DEFFLOAT, 0);
class_addmethod(tSeg2D_class, (t_method)tSeg2D_Ymin, gensym("setY1"), A_DEFFLOAT, 0);
class_addmethod(tSeg2D_class, (t_method)tSeg2D_Xmax, gensym("setX2"), A_DEFFLOAT, 0);
class_addmethod(tSeg2D_class, (t_method)tSeg2D_Ymax, gensym("setY2"), A_DEFFLOAT, 0);
class_addmethod(tSeg2D_class, (t_method)tSeg2D_P, gensym("setPmax"), A_DEFFLOAT, 0);
}
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