pmpd3d_various.c

// --------------------------------------------------------------------------
// This file is part of the pmpd software.
//
//    pmpd software 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 3 of the License, or
//    (at your option) any later version.
//
//    pmpd firmware 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 pmpd software. If not, see <http://www.gnu.org/licenses/>.
// -------------------------------------------------------------------------- 
//
// pmpd = physical modeling for pure data
// ch@chnry.net


void pmpd3d_infosL(t_pmpd3d *x)
{
	t_int i;
    post("list of %d mass", x->nb_mass);
	post("number, Id, mobile, mass, Damping, positionX Y Z, speedX Y Z, forcesX Y Z");
	for(i=0; i < x->nb_mass; i++)
	{
		post("masse %i: %s, %d, %f, %f, %f, %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].posZ, x->mass[i].speedX, x->mass[i].speedY, x->mass[i].speedZ, \
			x->mass[i].forceX, x->mass[i].forceY, x->mass[i].forceZ );
	}

    post("list of %d link", x->nb_link);
	post("number, Id, active, 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, %i, %f, %f, %f, %f, %f, %f", i, x->link[i].Id->s_name, x->link[i].active, \
				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, %i, %f, %f, %f, %f, %f, %f, %f, %f, %f", i, x->link[i].Id->s_name, x->link[i].active, \
				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, x->link[i].VZ);
			break;
		case 2:
			post("tabLink %i: %s, %i, %i, %i, %f, %f, %s, %f, %s, %f", i, x->link[i].Id->s_name, x->link[i].active, \
				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 pmpd3d_force(t_pmpd3d *x, t_symbol *s, int argc, t_atom *argv)
{
// add a force to a specific mass
	t_int tmp, i;
    t_garray *a;
    int npoints, n;
    t_word *vec;
    t_float K;
    
	if ( (argc == 4) && ( argv[0].a_type == A_FLOAT ) && ( argv[1].a_type == A_FLOAT ) && ( argv[2].a_type == A_FLOAT ) && ( argv[3].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);
		x->mass[tmp].forceZ += atom_getfloatarg(3, argc, argv);
	}
	else if ( (argc == 4) && ( argv[0].a_type == A_SYMBOL ) && ( argv[1].a_type == A_FLOAT ) && ( argv[2].a_type == A_FLOAT ) && ( argv[3].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);
				x->mass[i].forceZ += atom_getfloatarg(3, argc, argv);
			}
		}
	}
    else if ( (argc >= 2) && ( argv[0].a_type == A_SYMBOL ) && ( argv[1].a_type == A_SYMBOL ) )
    {
		K=1;
		if ((argc >= 3) && ( argv[2].a_type == A_FLOAT )) K=atom_getfloatarg(2, argc, argv);
		if (!(a = (t_garray *)pd_findbyclass(atom_getsymbolarg(1,argc,argv), garray_class)))
			pd_error(x, "%s: no such array", atom_getsymbolarg(1,argc,argv)->s_name);
		else if (!garray_getfloatwords(a, &npoints, &vec))
			pd_error(x, "%s: bad template for tabLink", atom_getsymbolarg(1,argc,argv)->s_name);
		else
		{
			n=0;
			for (i=0; i < x->nb_mass; i++)
			{
				if ( atom_getsymbolarg(0,argc,argv) == x->mass[i].Id)
				{
					if (n >= npoints-3) break;
					x->mass[i].forceX += K*vec[n].w_float;
					n++;
					x->mass[i].forceY += K*vec[n].w_float;
					n++;
					x->mass[i].forceZ += K*vec[n].w_float;
					n++;
				}
			}
		}
	}
}

void pmpd3d_forceX(t_pmpd3d *x, t_symbol *s, int argc, t_atom *argv)
{
// add a force to a specific mass
	t_int tmp, i;
    t_garray *a;
    int npoints, n;
    t_word *vec;
    t_float K;
    
	if ( (argc == 2) && ( 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);
	}
	else if ( (argc == 2) && ( 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);
			}
		}
	}
    else if ( (argc >= 2) && ( argv[0].a_type == A_SYMBOL ) && ( argv[1].a_type == A_SYMBOL ) )
    {
		K=1;
		if ((argc >= 3) && ( argv[2].a_type == A_FLOAT )) K=atom_getfloatarg(2, argc, argv);
		if (!(a = (t_garray *)pd_findbyclass(atom_getsymbolarg(1,argc,argv), garray_class)))
			pd_error(x, "%s: no such array", atom_getsymbolarg(1,argc,argv)->s_name);
		else if (!garray_getfloatwords(a, &npoints, &vec))
			pd_error(x, "%s: bad template for tabLink", atom_getsymbolarg(1,argc,argv)->s_name);
		else
		{
			n=0;
			for (i=0; i < x->nb_mass; i++)
			{
				if ( atom_getsymbolarg(0,argc,argv) == x->mass[i].Id)
				{
					x->mass[i].forceX += K*vec[n].w_float;
					n++;
					if (n >= npoints) break;
				}
			}
		}
	}
}

void pmpd3d_forceY(t_pmpd3d *x, t_symbol *s, int argc, t_atom *argv)
{
// add a force to a specific mass
	t_int tmp, i;
    t_garray *a;
    int npoints, n;
    t_word *vec;
    t_float K;
    
	if ( (argc == 2) && ( 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);
	}
	else if ( (argc == 2) && ( 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);
			}
		}
	}
    else if ( (argc >= 2) && ( argv[0].a_type == A_SYMBOL ) && ( argv[1].a_type == A_SYMBOL ) )
    {
		K=1;
		if ((argc >= 3) && ( argv[2].a_type == A_FLOAT )) K=atom_getfloatarg(2, argc, argv);
		if (!(a = (t_garray *)pd_findbyclass(atom_getsymbolarg(1,argc,argv), garray_class)))
			pd_error(x, "%s: no such array", atom_getsymbolarg(1,argc,argv)->s_name);
		else if (!garray_getfloatwords(a, &npoints, &vec))
			pd_error(x, "%s: bad template for tabLink", atom_getsymbolarg(1,argc,argv)->s_name);
		else
		{
			n=0;
			for (i=0; i < x->nb_mass; i++)
			{
				if ( atom_getsymbolarg(0,argc,argv) == x->mass[i].Id)
				{
					x->mass[i].forceY += K*vec[n].w_float;
					n++;
					if (n >= npoints) break;
				}
			}
		}
	}
}

void pmpd3d_forceZ(t_pmpd3d *x, t_symbol *s, int argc, t_atom *argv)
{
// add a force to a specific mass
	t_int tmp, i;
    t_garray *a;
    int npoints, n;
    t_word *vec;
    t_float K;
    
	if ( (argc == 2) && ( 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].forceZ += atom_getfloatarg(1, argc, argv);
	}
	else if ( (argc == 2) && ( 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].forceZ += atom_getfloatarg(1, argc, argv);
			}
		}
	}
    else if ( (argc >= 2) && ( argv[0].a_type == A_SYMBOL ) && ( argv[1].a_type == A_SYMBOL ) )
    {
		K=1;
		if ((argc >= 3) && ( argv[2].a_type == A_FLOAT )) K=atom_getfloatarg(2, argc, argv);
		if (!(a = (t_garray *)pd_findbyclass(atom_getsymbolarg(1,argc,argv), garray_class)))
			pd_error(x, "%s: no such array", atom_getsymbolarg(1,argc,argv)->s_name);
		else if (!garray_getfloatwords(a, &npoints, &vec))
			pd_error(x, "%s: bad template for tabLink", atom_getsymbolarg(1,argc,argv)->s_name);
		else
		{
			n=0;
			for (i=0; i < x->nb_mass; i++)
			{
				if ( atom_getsymbolarg(0,argc,argv) == x->mass[i].Id)
				{
					x->mass[i].forceZ += K*vec[n].w_float;
					n++;
					if (n >= npoints) break;
				}
			}
		}
	}
}

void pmpd3d_min(t_pmpd3d *x, t_float minX, t_float minY, t_float minZ)
{
	x->minX = minX;
	x->minY = minY;
	x->minZ = minZ;
}

void pmpd3d_max(t_pmpd3d *x, t_float maxX, t_float maxY, t_float maxZ)
{
	x->maxX = maxX;
	x->maxY = maxY;
	x->maxZ = maxZ;
}

void pmpd3d_minX(t_pmpd3d *x, t_float min)
{
	x->minX = min;
}

void pmpd3d_maxX(t_pmpd3d *x, t_float max)
{
	x->maxX = max;
}

void pmpd3d_minY(t_pmpd3d *x, t_float min)
{
	x->minY = min;
}

void pmpd3d_maxY(t_pmpd3d *x, t_float max)
{
	x->maxY = max;
}

void pmpd3d_minZ(t_pmpd3d *x, t_float min)
{
	x->minZ = min;
}

void pmpd3d_maxZ(t_pmpd3d *x, t_float max)
{
	x->maxZ = max;
}

void pmpd3d_addPos(t_pmpd3d *x, t_symbol *s, int argc, t_atom *argv)
{
	t_int tmp, i;

	if ( (argc == 4) && ( argv[0].a_type == A_FLOAT ) && ( argv[1].a_type == A_FLOAT ) && ( argv[2].a_type == A_FLOAT ) && ( argv[3].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);
		x->mass[tmp].posZ += atom_getfloatarg(3, argc, argv);
	}
	else if ( (argc == 4) && ( argv[0].a_type == A_SYMBOL ) && ( argv[1].a_type == A_FLOAT ) && ( argv[2].a_type == A_FLOAT ) && ( argv[3].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);
				x->mass[i].posZ += atom_getfloatarg(3, argc, argv);
			}
		}
	}
}

void pmpd3d_addPosX(t_pmpd3d *x, t_symbol *s, int argc, t_atom *argv)
{
	t_int tmp, i;

	if ( (argc == 2) && ( 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);
	}
	else if ( (argc == 2) && ( 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 pmpd3d_addPosY(t_pmpd3d *x, t_symbol *s, int argc, t_atom *argv)
{
	t_int tmp, i;

	if ( (argc == 2) && ( 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);
	}
	else if ( (argc == 2) && ( 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 pmpd3d_addPosZ(t_pmpd3d *x, t_symbol *s, int argc, t_atom *argv)
{
	t_int tmp, i;

	if ( (argc == 2) && ( 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].posZ += atom_getfloatarg(1, argc, argv);
	}
	else if ( (argc == 2) && ( 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].posZ += atom_getfloatarg(1, argc, argv);
			}
		}
	}
}

void pmpd3d_grabMass(t_pmpd3d *x, t_float posX, t_float posY, t_float posZ, 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 = pmpd3d_sqr(x->mass[0].posX - posX) + pmpd3d_sqr(x->mass[0].posY - posY) + pmpd3d_sqr(x->mass[0].posZ - posZ);
		for (i=1; i<x->nb_mass; i++)
		{
			tmp = pmpd3d_sqr(x->mass[i].posX - posX) + pmpd3d_sqr(x->mass[i].posY - posY) + pmpd3d_sqr(x->mass[i].posZ - posZ);
			if (tmp < dist)
			{
				dist = tmp;
				x->grab_nb= i;
			}
		}
	}
	else if (x->grab == 1)
	{
		x->mass[x->grab_nb].posX = posX;
		x->mass[x->grab_nb].posY = posY;
		x->mass[x->grab_nb].posZ = posZ;
	}
}

void pmpd3d_closestMass(t_pmpd3d *x, t_symbol *s, int argc, t_atom *argv)
{
	t_float dist, tmp;
	t_int i;
	t_atom std_out[4];

	t_float posX, posY, posZ;
	posX = atom_getfloatarg(0, argc, argv);
	posY = atom_getfloatarg(1, argc, argv);
	posZ = atom_getfloatarg(2, argc, argv);
	if ( (argc == 4)  && (argv[3].a_type == A_SYMBOL) )
	{
		//t_symbol *mass_name = atom_getsymbolarg(2, argc, argv);
		if ((x->nb_mass > 0))
		{
			dist = 1000000000;//pmpd3d_sqr(x->mass[0].posX - posX) + pmpd3d_sqr(x->mass[0].posY - posY);
			for (i=0; i<x->nb_mass; i++)
			{
				if (atom_getsymbolarg(3,argc,argv) == x->mass[i].Id)
				{
					tmp = pmpd3d_sqr(x->mass[i].posX - posX) + pmpd3d_sqr(x->mass[i].posY - posY) + pmpd3d_sqr(x->mass[i].posZ - posZ);
					if (tmp < dist)
					{
						dist = tmp;
						x->grab_nb= i;
					}
				}
			}
		}
	}
	else {
		if ((x->nb_mass > 0))
		{
			x->grab_nb= 0;
			dist = pmpd3d_sqr(x->mass[0].posX - posX) + pmpd3d_sqr(x->mass[0].posY - posY) + pmpd3d_sqr(x->mass[0].posZ - posZ);
			for (i=1; i<x->nb_mass; i++)
			{
				tmp = pmpd3d_sqr(x->mass[i].posX - posX) + pmpd3d_sqr(x->mass[i].posY - posY) + pmpd3d_sqr(x->mass[i].posZ - posZ);
				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);
	SETFLOAT(&(std_out[3]), x->mass[x->grab_nb].posZ);
	outlet_anything(x->main_outlet, gensym("closestMass"),4,std_out);

}

void pmpd3d_massDistances_f_f(t_pmpd3d *x, t_int i, t_int j)
{
	t_float dist,dx,dy,dz;
	t_atom to_out[6];

	dx = x->mass[i].posX - x->mass[j].posX;
	dy = x->mass[i].posY - x->mass[j].posY;
	dz = x->mass[i].posZ - x->mass[j].posZ;
	dist = pmpd3d_sqr(dx) + pmpd3d_sqr(dy) + pmpd3d_sqr(dz);
	dist = sqrt(dist);

	SETFLOAT(&(to_out[0]), i);
	SETFLOAT(&(to_out[1]), j);
	SETFLOAT(&(to_out[2]), dx);
	SETFLOAT(&(to_out[3]), dy);
	SETFLOAT(&(to_out[4]), dz);	
	SETFLOAT(&(to_out[5]), dist);
	outlet_anything(x->main_outlet, gensym("distance"), 6, to_out);
}

void pmpd3d_massDistances(t_pmpd3d *x, t_symbol *s, int argc, t_atom *argv)
{
	t_int i,j;

	if ( (argc == 2) && (argv[0].a_type == A_FLOAT) && (argv[1].a_type == A_FLOAT) )
	{
		pmpd3d_massDistances_f_f(x, atom_getfloatarg(0, argc, argv), atom_getfloatarg(1, argc, argv));
	}
	else if ( (argc == 2) && (argv[0].a_type == A_FLOAT) && (argv[1].a_type == A_SYMBOL) )
	{
		for (i=0; i < x->nb_mass; i++)
		{
			if ( atom_getsymbolarg(1,argc,argv) == x->mass[i].Id)
			{
				pmpd3d_massDistances_f_f(x, atom_getfloatarg(0, argc, argv), i);
			}
		}
	}
	else if ( (argc == 2) && (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) )
			{
				pmpd3d_massDistances_f_f(x, atom_getfloatarg(1, argc, argv), i);
			}
		}
	}
	else if ( (argc == 2) && (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)
			{
				for (j=i+1; j < x->nb_mass; j++)
				{
					if ( atom_getsymbolarg(1,argc,argv) == x->mass[j].Id)
					{
						pmpd3d_massDistances_f_f(x,i, j);
					}
				}
			}
		}
	}
	else if (argc == 0)
	{
		for (i=0; i < x->nb_mass; i++)
		{
			for (j=i+1; j < x->nb_mass; j++)
			{
				pmpd3d_massDistances_f_f(x,i, j);
			}
		}
	}
	else 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)
			{
				for (j=i+1; j < x->nb_mass; j++)
				{
					pmpd3d_massDistances_f_f(x,i, j);
				}
			}
		}
	}
	else if ( (argc == 1) && (argv[0].a_type == A_FLOAT) )
	{
		for (i=0; i < x->nb_mass; i++)
		{
			pmpd3d_massDistances_f_f(x, atom_getfloatarg(0, argc, argv), i);
		}
	}
}

static inline int pmpd3d_bulle_order(t_int *listIndex, t_float *listDistance, t_int index)
{
    t_int tmpI;
    t_float tmpD;
    
    if ( listDistance[index] < listDistance[index+1] )
    {
        tmpD =  listDistance[index];
        tmpI =  listIndex[index];
        listDistance[index] = listDistance[index+1];
        listIndex[index] = listIndex[index+1];
        listDistance[index+1] = tmpD;
        listIndex[index+1]= tmpI;
        return(1);
    }
    return(0);
}

void pmpd3d_closestMassN(t_pmpd3d *x, t_symbol *s, int argc, t_atom *argv)
{
	t_float dist;
	t_int i, j, nbout;
	t_int* list_index = (t_int*)malloc(x->nb_mass * sizeof(t_int));
    t_float* list_distance = (t_float*)malloc(x->nb_mass * sizeof(t_float));
	t_atom* std_out = (t_atom*)malloc(x->nb_mass * 2 * sizeof(t_atom));
	t_float posX, posY, posZ;

	if ( (argc >= 1)  && (argv[0].a_type == A_FLOAT) )
        nbout = atom_getfloatarg(0, argc, argv);
    else
        nbout = 1;
    nbout = max(nbout,0);
    nbout = min(nbout,x->nb_mass);

    if ( (argc >= 2)  && (argv[1].a_type == A_FLOAT) )
        posX = atom_getfloatarg(1, argc, argv);
    else
        posX = 0;

    if ( (argc >= 3)  && (argv[2].a_type == A_FLOAT) )
        posY = atom_getfloatarg(2, argc, argv);
    else
        posY = 0;
        
    if ( (argc >= 4)  && (argv[3].a_type == A_FLOAT) )
        posZ = atom_getfloatarg(3, argc, argv);
    else
        posZ = 0;

    for (i=0; i < nbout; i++) // on remplie avec les premiere données disponible
    {
        list_index[i] = i;
        list_distance[i] = pmpd3d_sqr(x->mass[i].posX - posX) + pmpd3d_sqr(x->mass[i].posY - posY) + pmpd3d_sqr(x->mass[i].posZ - posZ);
    }

    for (i=1; i < nbout; i++) //trie a bulle pour ordoner cela
    {
        for (j=0; j < nbout-i; j++)
        {
            pmpd3d_bulle_order(list_index, list_distance, j);
        } 
    }
  
    for (i = nbout; i< x->nb_mass; i++) // on test le reste des masses
    {
        dist = pmpd3d_sqr(x->mass[i].posX - posX) + pmpd3d_sqr(x->mass[i].posY - posY) + pmpd3d_sqr(x->mass[i].posZ - posZ);
        if (dist < list_distance[0]) // cette mass doit rentrer dans la liste
        {
            list_index[0] = i;
            list_distance[0] = dist;
            j = 0;
            while ( (j<nbout-1) && pmpd3d_bulle_order(list_index, list_distance, j) ) // on reordone la liste
            {
                j++;
            }
        }
    }
  
    for (i=0; i<nbout; i++)
    {
        SETFLOAT(&(std_out[2*i]), list_index[nbout-1-i]);
        SETFLOAT(&(std_out[2*i+1]), sqrt(list_distance[nbout-1-i]));        
    }

	outlet_anything(x->main_outlet, gensym("closestMassN"),2*nbout,std_out);

	free(list_index);
	free(list_distance);
	free(std_out);
}