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main.c
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/*
* This code tries to implement a particle-based fluid simulation
* based on the paper "Particle-Based Fluid Simulation for Interactive Applications"
* form M. Muller, D. Charypar and M. Gross (SIGGRAPH'05 Symposium on Computer Animation (SCA 2005)).
* There is no interaction or graphic interface implemented. The program generate a .par file
* containing the evolution of the particles through the simulation. (a .par file is supposed to
* be open with the Basic Particle Viewer program (bpv))
* */
#include "particles.h"
#include <time.h>
void tmpAddWalls_1(System *sys);
void tmpAddWalls_2(System *sys);
void tmpAddWalls_3(System *sys);
//void printGrid(System *sys);
int main(int argc, char *argv[]){
int nbParts=20000;
float minMax[3][2]={{-1,1},{-1,1},{-1,1}};
float cellSize=2*0.02*1.001;// 2*particle radius + 0.1%
float dt=0.002,simTime=5;
float dtFrame=0.02; //0.04 <=> 25 frames per seconds
int nbDtPerFrame,i;
char filename[]="toto.par";
float mass;
System *sys;
clock_t time;
/*
FILE *file;
float r[3];
file=fopen("filter.plt","w");
fprintf(file,"VARIABLES = x w\n");
r[1]=r[2]=0;
for(i=0;i<=100;i++){
r[0]=i/100.;
fprintf(file,"%e\t%e\n",i/100.,kernelPoly6(r,1));
}
fclose(file);
return 0;*/
nbDtPerFrame=dtFrame/dt;
sys=createSystem(nbParts,minMax);
tmpAddWalls_1(sys);
setGrid(sys, cellSize);
//printGrid(sys); //test nico
//return 0;
mass=1000*(minMax[0][1]-minMax[0][0])*(minMax[1][1]-minMax[1][0])*(minMax[2][1]-minMax[2][0])/nbParts;
setParticles(sys,0,nbParts-1,mass/4); //for water, ro0=1000kg/m3, so 1000 parts/Liter => mi=1e-3kg
setForces(sys);
generateParFile(sys,filename,CREATE);
i=0;
time=clock();
while(sys->time<=simTime){
printf("time = %e (i=%d)\n",sys->time,i);fflush(stdout);
updateSys(sys,dt);
if((++i)%nbDtPerFrame==0)
generateParFile(sys,filename,UPDATE);
}
time=clock()-time;
generateParFile(sys,filename,CLOSE);
deleteSystem(sys);
updateSys(NULL,0);
#ifdef USE_MULTI_THREADING
cleanThreads();
#endif
printf("done in %f sec!\n", (double)(time)/CLOCKS_PER_SEC);
return 0;
}
/******************************************************************************************
* ****************************************************************************************
* ****************************************************************************************/
void tmpAddWalls_1(System *sys){
float v1[3],v2[3],v3[3],v4[3];
v1[0]=-0.5; v1[1]=1; v1[2]=-0.5;
v2[0]=-0.5; v2[1]=-1; v2[2]=-0.5;
v3[0]=1; v3[1]=-1; v3[2]=0.5;
v4[0]=1; v4[1]=1; v4[2]=0.5;
addWall(sys,createWall(v1,v2,v3));
addWall(sys,createWall(v1,v3,v4));
v1[0]=-0.5; v1[1]=1; v1[2]=-0.51;
v2[0]=-0.5; v2[1]=-1; v2[2]=-0.51;
v3[0]=1; v3[1]=-1; v3[2]=0.49;
v4[0]=1; v4[1]=1; v4[2]=0.49;
addWall(sys,createWall(v1,v3,v2));
addWall(sys,createWall(v1,v4,v3));
}
void tmpAddWalls_2(System *sys){
float minx,maxx;
float miny,maxy;
float minz,maxz;
float v1[3],v2[3],v3[3],v4[3];
float v5[3],v6[3],v7[3],v8[3];
float v9[3];
minx=-1;
maxx=1;
miny=-1;
maxy=1;
minz=-1;
maxz=0;
v1[0]=(minx+maxx)/2; v1[1]=miny; v1[2]=(minz+maxz)/2;
v2[0]=maxx; v2[1]=(miny+maxy)/2; v2[2]=(minz+maxz)/2;
v3[0]=(minx+maxx)/2; v3[1]=maxy; v3[2]=(minz+maxz)/2;
v4[0]=minx; v4[1]=(miny+maxy)/2; v4[2]=(minz+maxz)/2;
v5[0]=minx; v5[1]=miny; v5[2]=maxz;
v6[0]=maxx; v6[1]=miny; v6[2]=maxz;
v7[0]=maxx; v7[1]=maxy; v7[2]=maxz;
v8[0]=minx; v8[1]=maxy; v8[2]=maxz;
v9[0]=(minx+maxx)/2; v9[1]=(miny+maxy)/2; v9[2]=minz;
addWall(sys,createWall(v1,v2,v9));
addWall(sys,createWall(v1,v6,v2));
addWall(sys,createWall(v2,v3,v9));
addWall(sys,createWall(v2,v7,v3));
addWall(sys,createWall(v3,v4,v9));
addWall(sys,createWall(v3,v8,v4));
addWall(sys,createWall(v4,v1,v9));
addWall(sys,createWall(v4,v5,v1));
}
void tmpAddWalls_3(System *sys){
float xmin,xmax;
float ymin,ymax;
float zmin,zmax; //position of wall
float holeDim; //hole centered on (xmax+xmin)/2 and (ymin+ymax)/2
float xmin2,xmax2;
float ymin2,ymax2;
float v[24][3];
xmin=-1;
xmax=1;
ymin=-1;
ymax=1;
zmin=-0.3;
zmax=0.3;
holeDim=0.2;
xmin2=(xmin+xmax)/2-holeDim/2;
xmax2=(xmin+xmax)/2+holeDim/2;
ymin2=(ymin+ymax)/2-holeDim/2;
ymax2=(ymin+ymax)/2+holeDim/2;
v[0][0]=xmin; v[0][1]=ymin; v[0][2]=zmin;
v[1][0]=xmin; v[1][1]=ymax; v[1][2]=zmin;
v[2][0]=xmax; v[2][1]=ymax; v[2][2]=zmin;
v[3][0]=xmax; v[3][1]=ymin; v[3][2]=zmin;
v[4][0]=xmin2; v[4][1]=ymin2; v[4][2]=zmin;
v[5][0]=xmin2; v[5][1]=ymax2; v[5][2]=zmin;
v[6][0]=xmax2; v[6][1]=ymax2; v[6][2]=zmin;
v[7][0]=xmax2; v[7][1]=ymin2; v[7][2]=zmin;
v[8][0]=xmin2; v[8][1]=ymin; v[8][2]=zmin;
v[9][0]=xmin2; v[9][1]=ymax; v[9][2]=zmin;
v[10][0]=xmax2; v[10][1]=ymax; v[10][2]=zmin;
v[11][0]=xmax2; v[11][1]=ymin; v[11][2]=zmin;
v[12][0]=xmin; v[12][1]=ymin; v[12][2]=zmax;
v[13][0]=xmin; v[13][1]=ymax; v[13][2]=zmax;
v[14][0]=xmax; v[14][1]=ymax; v[14][2]=zmax;
v[15][0]=xmax; v[15][1]=ymin; v[15][2]=zmax;
v[16][0]=xmin2; v[16][1]=ymin2; v[16][2]=zmax;
v[17][0]=xmin2; v[17][1]=ymax2; v[17][2]=zmax;
v[18][0]=xmax2; v[18][1]=ymax2; v[18][2]=zmax;
v[19][0]=xmax2; v[19][1]=ymin2; v[19][2]=zmax;
v[20][0]=xmin2; v[20][1]=ymin; v[20][2]=zmax;
v[21][0]=xmin2; v[21][1]=ymax; v[21][2]=zmax;
v[22][0]=xmax2; v[22][1]=ymax; v[22][2]=zmax;
v[23][0]=xmax2; v[23][1]=ymin; v[23][2]=zmax;
addWall(sys,createWall(v[0],v[1],v[9]));
addWall(sys,createWall(v[0],v[9],v[8]));
addWall(sys,createWall(v[5],v[9],v[10]));
addWall(sys,createWall(v[5],v[10],v[6]));
addWall(sys,createWall(v[8],v[4],v[7]));
addWall(sys,createWall(v[8],v[7],v[11]));
addWall(sys,createWall(v[11],v[10],v[2]));
addWall(sys,createWall(v[11],v[2],v[3]));
addWall(sys,createWall(v[12],v[21],v[13]));
addWall(sys,createWall(v[12],v[20],v[21]));
addWall(sys,createWall(v[17],v[22],v[21]));
addWall(sys,createWall(v[17],v[18],v[22]));
addWall(sys,createWall(v[20],v[19],v[16]));
addWall(sys,createWall(v[20],v[23],v[19]));
addWall(sys,createWall(v[23],v[14],v[22]));
addWall(sys,createWall(v[23],v[15],v[14]));
addWall(sys,createWall(v[4],v[16],v[19]));
addWall(sys,createWall(v[4],v[19],v[7]));
addWall(sys,createWall(v[5],v[18],v[17]));
addWall(sys,createWall(v[5],v[6],v[18]));
addWall(sys,createWall(v[5],v[17],v[16]));
addWall(sys,createWall(v[5],v[16],v[4]));
addWall(sys,createWall(v[6],v[19],v[18]));
addWall(sys,createWall(v[6],v[7],v[19]));
}
//void printGrid(System *sys){
// char filename[]="grid.par";
// System sysGrid;
// int i;
//
// sysGrid.time=0;
// sysGrid.nbParts=sys->grid->ncells;
// sysGrid.parts=(Particle*)calloc(sysGrid.nbParts, sizeof(Particle));
// for(i=0; i<sysGrid.nbParts; i++){
// sysGrid.parts[i].pos[0]=sys->grid->cells[i].pos[0];
// sysGrid.parts[i].pos[1]=sys->grid->cells[i].pos[1];
// sysGrid.parts[i].pos[2]=sys->grid->cells[i].pos[2];
// sysGrid.parts[i].ro=sys->grid->cells[i].kernelCoef;
// }
// generateParFile(&sysGrid,filename,CREATE);
// generateParFile(&sysGrid,filename,CLOSE);
// free(sysGrid.parts);
// printf("generated %s\n",filename);
// fflush(stdout);
//}