void enforceConstraints() {
// Perfect vertical reflection.
if (fBall.pos.fY < kBounds.fTop || fBall.pos.fY >= kBounds.fBottom) {
fBall.spd.fY = -fBall.spd.fY;
fBall.pos.fY = box_reflect(fBall.pos.fY, kBounds.fTop, kBounds.fBottom);
}
// Horizontal bounce - introduces a speed fuzz.
if (fBall.pos.fX < kBounds.fLeft || fBall.pos.fX >= kBounds.fRight) {
fBall.spd.fX = this->fuzzBallSpeed(-fBall.spd.fX);
fBall.spd.fY = this->fuzzBallSpeed(fBall.spd.fY);
fBall.pos.fX = box_reflect(fBall.pos.fX, kBounds.fLeft, kBounds.fRight);
this->updatePaddleStrategy();
}
}
int main(int argc, char** argv)
{
//printf("%f\n",GRID_NUM);
struct timespec diff(struct timespec start, struct timespec end);
struct timespec time1, time2;
struct timespec time_stamp;
int npart,i,j,Num;
params param;
mols mol;
adjacent adj;
param.npart = N_BODY_NUM;
param.dt = DT;
param.eps_lj = EPS;
param.sig_lj = SIG;
mol.x = malloc(2*param.npart * sizeof(float));
mol.v = malloc(2*param.npart * sizeof(float));
mol.a = malloc(2*param.npart * sizeof(float));
mol.F = malloc(2*param.npart * sizeof(float));
#if (NEAREST)
double Blength = BLOCK_LENGTH(GRID_NUM,BOX_SIZE);
printf("Blength: %lf\n",Blength);
Num = EST_NUM(GRID_NUM,N_BODY_NUM);
Num = 4*Num;
if(!Num)
{
Num = 4;
}
if(N_BODY_NUM < Num)
{
Num = N_BODY_NUM;
}
adj.n = malloc(sizeof(int) * GRID_NUM * GRID_NUM * Num);
memset(adj.n,-1,sizeof(int) * GRID_NUM * GRID_NUM * Num);
printf("Num: %d\n",Num);
#endif
npart = init_particles(param.npart, mol.x , mol.v, ¶m);
if(npart < param.npart)
{
fprintf(stderr, "Could not generate %d particles, Trying %d particles instead\n",param.npart,npart);
param.npart = npart;
}
else
{
fprintf(stdout,"Generated %d particles\n",param.npart);
}
init_particles_va( param.npart, mol.v,mol.a, ¶m);
#if(NEAREST)
printf("Before gridSort\n");
gridSort(npart, GRID_NUM, Num, adj.n, mol.x);
printf("After gridSort\n");
#endif
/*for(i=0;i<npart;i++)
printf("myBlockNum: %d\n",getMyBlock(param.npart,2*i, adj.n, Num/2));
for(i=0; i < param.npart; i++)
{
printf("nBody-Num: %d Posx: %f Velx: %f Accx: %f Forcex: %f\n",i,
mol.x[2*i],mol.v[2*i],mol.a[2*i],mol.F[2*i]);
printf("nBody-Num: %d Posy: %f Vely: %f Accy: %f Forcey: %f\n",i,
mol.x[2*i+1],mol.v[2*i+1],mol.a[2*i+1],mol.F[2*i+1]);
}
*/
#if(LINUX)
clock_gettime(CLOCK_REALTIME, &time1);
#endif
#if(NEAREST)
compute_forces_nearby(param.npart, adj.n, mol.x, mol.F, GRID_NUM, Num);
#elif(OPT)
compute_forces(param.npart,mol.x,mol.F);
#else
compute_forces_naive(param.npart,mol.x,mol.F);
#endif
printf("After First ComputeForces\n");
for(i=0;i<ITERS;i++)
{
#if(NEAREST)
gridSort(npart, GRID_NUM, Num, adj.n, mol.x); // Added in the gridSort function for each iteration
#endif
verletInt1(param.npart,param.dt , mol.x, mol.v,mol.a);
box_reflect(param.npart,mol.x,mol.v,mol.a );
#if(NEAREST)
compute_forces_nearby(param.npart, adj.n, mol.x, mol.F, GRID_NUM, Num);
#elif(OPT)
compute_forces(param.npart,mol.x,mol.F);
#else
compute_forces_naive(param.npart,mol.x,mol.F);
#endif
verletInt2(param.npart,param.dt, mol.x, mol.v, mol.a);
memset(mol.F, 0 , 2*param.npart * sizeof(float));
}
#if(LINUX)
clock_gettime(CLOCK_REALTIME, &time2);
#endif
/*
for(i=0; i < param.npart; i++)
{
printf("nBody-Num: %d Posx: %f Velx: %f Accx: %f Forcex: %f\n",i,
mol.x[2*i],mol.v[2*i],mol.a[2*i],mol.F[2*i]);
printf("nBody-Num: %d Posy: %f Vely: %f Accy: %f Forcey: %f\n",i,
mol.x[2*i+1],mol.v[2*i+1],mol.a[2*i+1],mol.F[2*i+1]);
}
*/
#if(LINUX)
double blength = BLOCK_LENGTH(GRID_NUM,BOX_SIZE);
printf("Boxsize: %lf,Blocksize: %lf,MaxBodiesPerBlock: %d\n",BOX_SIZE,blength, maxNumPartPerBlock(blength,SIG));
time_stamp = diff(time1,time2);
printf("Execution time: %lf\n",(double)((time_stamp.tv_sec + (time_stamp.tv_nsec/1.0e9))));
#else
printf("Boxsize: %lf,BlockNum: %lf,MaxBodiesPerBlock: %d\n",BOX_SIZE,GRID_NUM, maxNumPartPerBlock(GRID_NUM,SIG));
#endif
/* // test statements for the grid allocation
int count =0;
for(i=0;i<GRID_NUM*GRID_NUM*Num/2;i++)
{
if(adj.n[i]!=-1)
{
count++;
}
}
printf("%d\n",count);
*/
#if(NEAREST)
free(adj.n);
#endif
free(mol.x);
free(mol.v);
free(mol.a);
free(mol.F);
printf("Done\n");
return 0;
}