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void pmpd2d_iCircle_i(t_pmpd2d *x, int i, t_float a, t_float b, t_float r, t_float K, t_float power, t_float Rmin, t_float Rmax)
{
t_float distance, X, Y, rayon, tmp;
X = x->mass[i].posX - a;
Y = x->mass[i].posY - b;
rayon = sqrt ( sqr(X) + sqr(Y) );
distance = rayon - r;
if (rayon != 0)
{
X /= rayon; // normalisation
Y /= rayon;
}
else
{
X = 0; // normalisation
Y = 0;
}
// X, Y : vecteur unitaire normal au cercle
// rayon : distance au centre.
if ( (distance>Rmin) && (distance<=Rmax) )
{
tmp = -pow_ch(K * distance, power);
x->mass[i].forceX += X * tmp;
x->mass[i].forceY += Y * tmp;
}
}
void pmpd2d_iCircle(t_pmpd2d *x, t_symbol *s, int argc, t_atom *argv)
{
// Argument :
// 0 : mass to apply this interactor
// 1,2 : XY : center of the Circle
// 3 : Circle radius
// 4 : K
// [5] : power of the force
// [6] : min radium of the interactor
// [7] : max radium of the interactor
t_float a, b, R, K, power, Rmin, Rmax;
t_int i;
if (!((argc>=5) && (argv[1].a_type == A_FLOAT)&& (argv[2].a_type == A_FLOAT)&& (argv[3].a_type == A_FLOAT) ))
{
post("bad argument for iCircle");
return;
}
a = atom_getfloatarg(1, argc, argv);
b = atom_getfloatarg(2, argc, argv);
R = atom_getfloatarg(3, argc, argv);
K = atom_getfloatarg(4, argc, argv);
power = atom_getfloatarg(5, argc, argv);
if (power == 0) power = 1;
Rmin = 0;
if ((argc>=7) && (argv[6].a_type == A_FLOAT)) { Rmin = (atom_getfloatarg(6,argc,argv));}
Rmax = 1000000;
if ((argc>=8) && (argv[7].a_type == A_FLOAT)) { Rmax = (atom_getfloatarg(7,argc,argv));}
if ((argc>0) && (argv[0].a_type == A_FLOAT) && (atom_getfloatarg(0,argc,argv) == -1)) // all
{
for (i=0; i < x->nb_mass; i++)
{
pmpd2d_iCircle_i(x, i, a, b, R, K, power, Rmin, Rmax);
}
}
else if (((argc>0) && argv[0].a_type == A_FLOAT))
{
pmpd2d_iCircle_i(x, atom_getfloatarg(0,argc,argv), a, b, R, K, power, Rmin, Rmax);
}
else if ((argc>0) && (argv[0].a_type == A_SYMBOL))
{
for (i=0; i < x->nb_mass; i++)
{
if (atom_getsymbolarg(0,argc,argv) == x->mass[i].Id)
{
pmpd2d_iCircle_i(x, i, a, b, R, K, power, Rmin, Rmax);
}
}
}
}
// --------------------------------------------------------
void pmpd2d_iLine_i(t_pmpd2d *x, int i, t_float a, t_float b, t_float c, t_float K, t_float power, t_float Rmin, t_float Rmax)
{
t_float distance, force;
distance = ( (a * x->mass[i].posX) + (b * x->mass[i].posY) ) - c;
if ( (distance>Rmin) && (distance<=Rmax) )
{
force = -pow_ch(K * distance, power);
x->mass[i].forceX += a * force;
x->mass[i].forceY += b * force;
}
}
void pmpd2d_iLine(t_pmpd2d *x, t_symbol *s, int argc, t_atom *argv)
{
// Argument :
// 0 : mass to apply this interactor
// 1, 2 : X1 Y1 : 1st point of the line
// 3, 4 : X2 Y2 : 2nd point of the line
// 5 : K
// [6] : power of the force
// [7] : min radium of the interactor
// [8] : max radium of the interactor
t_float a, b, c, X1, X2, Y1, Y2, K, power, tmp, Rmin, Rmax;
t_int i;
if (!((argc>=6) && (argv[1].a_type == A_FLOAT) && (argv[2].a_type == A_FLOAT) && (argv[3].a_type == A_FLOAT) && (argv[4].a_type == A_FLOAT) && (argv[5].a_type == A_FLOAT) ))
{
post("bad argument for iLine");
return;
}
X1 = atom_getfloatarg(1, argc, argv);
Y1 = atom_getfloatarg(2, argc, argv);
X2 = atom_getfloatarg(3, argc, argv);
Y2 = atom_getfloatarg(4, argc, argv);
a = Y2 - Y1;
b = X1 - X2;
tmp = sqrt(a*a + b*b);
if (tmp == 0)
{
a = 1;
b = 0;
tmp = 1;
}
a /= tmp;
b /= tmp;
c = - (a * X1 + b * Y1);
// line equation : aX + bY + c = 0
K = atom_getfloatarg(5, argc, argv);
power = atom_getfloatarg(6, argc, argv);
if (power == 0) power = 1;
Rmin = -1000000;
if ((argc>=8) && (argv[7].a_type == A_FLOAT)) { Rmin = (atom_getfloatarg(7,argc,argv));}
Rmax = 1000000;
if ((argc>=9) && (argv[8].a_type == A_FLOAT)) { Rmax = (atom_getfloatarg(8,argc,argv));}
if ((argc>0) && (argv[0].a_type == A_FLOAT) && (atom_getfloatarg(0,argc,argv) == -1)) // all
{
for (i=0; i < x->nb_mass; i++)
{
pmpd2d_iLine_i(x, i, a, b, c, K, power, Rmin, Rmax);
}
}
else if (((argc>0) && argv[0].a_type == A_FLOAT))
{
pmpd2d_iLine_i(x, atom_getfloatarg(0,argc,argv), a, b, c, K, power, Rmin, Rmax);
}
else if ((argc>0) && (argv[0].a_type == A_SYMBOL))
{
for (i=0; i < x->nb_mass; i++)
{
if (atom_getsymbolarg(0,argc,argv) == x->mass[i].Id)
{
pmpd2d_iLine_i(x, i, a, b, c, K, power, Rmin, Rmax);
}
}
}
}
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