Example #1
0
void gravity_update_async()
{
	int result;
	if(ngrav_enable)
	{
		pthread_mutex_lock(&gravmutex);
		result = grav_ready;
		if(result) //Did the gravity thread finish?
		{
			if (!sys_pause||framerender){ //Only update if not paused
				//Switch the full size gravmaps, we don't really need the two above any more
				float *tmpf;

				if (gravity_cleared)
				{
					memset(th_gravx, 0, (XRES/CELL)*(YRES/CELL)*sizeof(float));
					memset(th_gravy, 0, (XRES/CELL)*(YRES/CELL)*sizeof(float));
					memset(th_gravp, 0, (XRES/CELL)*(YRES/CELL)*sizeof(float));
					memset(th_ogravmap, 0, (XRES/CELL)*(YRES/CELL)*sizeof(float));
					gravity_cleared = 0;
				}

				if(th_gravchanged)
				{
				#if !defined(GRAVFFT) && defined(GRAV_DIFF)
					memcpy(gravy, th_gravy, (XRES/CELL)*(YRES/CELL)*sizeof(float));
					memcpy(gravx, th_gravx, (XRES/CELL)*(YRES/CELL)*sizeof(float));
					memcpy(gravp, th_gravp, (XRES/CELL)*(YRES/CELL)*sizeof(float));
				#else
					tmpf = gravy;
					gravy = th_gravy;
					th_gravy = tmpf;
	
					tmpf = gravx;
					gravx = th_gravx;
					th_gravx = tmpf;
	
					tmpf = gravp;
					gravp = th_gravp;
					th_gravp = tmpf;
				#endif
				}

				tmpf = gravmap;
				gravmap = th_gravmap;
				th_gravmap = tmpf;

				grav_ready = 0; //Tell the other thread that we're ready for it to continue
				pthread_cond_signal(&gravcv);
			}
		}
		pthread_mutex_unlock(&gravmutex);
		//Apply the gravity mask
		membwand(gravy, gravmask, (XRES/CELL)*(YRES/CELL)*sizeof(float), (XRES/CELL)*(YRES/CELL)*sizeof(unsigned));
		membwand(gravx, gravmask, (XRES/CELL)*(YRES/CELL)*sizeof(float), (XRES/CELL)*(YRES/CELL)*sizeof(unsigned));
		memset(gravmap, 0, (XRES/CELL)*(YRES/CELL)*sizeof(float));
	}
}
Example #2
0
void Gravity::gravity_update_async()
{
	int result;
	if (ngrav_enable)
	{
		bool signal_grav = false;

		{
			std::unique_lock<std::mutex> l(gravmutex, std::defer_lock);
			if (l.try_lock())
			{
				result = grav_ready;
				if (result) //Did the gravity thread finish?
				{
					float *tmpf;

					if (th_gravchanged && !ignoreNextResult)
					{
					#if !defined(GRAVFFT) && defined(GRAV_DIFF)
						memcpy(gravy, th_gravy, (XRES/CELL)*(YRES/CELL)*sizeof(float));
						memcpy(gravx, th_gravx, (XRES/CELL)*(YRES/CELL)*sizeof(float));
						memcpy(gravp, th_gravp, (XRES/CELL)*(YRES/CELL)*sizeof(float));
					#else
						tmpf = gravy;
						gravy = th_gravy;
						th_gravy = tmpf;

						tmpf = gravx;
						gravx = th_gravx;
						th_gravx = tmpf;

						tmpf = gravp;
						gravp = th_gravp;
						th_gravp = tmpf;
					#endif
					}
					ignoreNextResult = false;

					tmpf = gravmap;
					gravmap = th_gravmap;
					th_gravmap = tmpf;

					grav_ready = 0; //Tell the other thread that we're ready for it to continue
					signal_grav = true;
				}
			}
		}

		if (signal_grav)
		{
			gravcv.notify_one();
		}
		//Apply the gravity mask
		membwand(gravy, gravmask, (XRES/CELL)*(YRES/CELL)*sizeof(float), (XRES/CELL)*(YRES/CELL)*sizeof(unsigned));
		membwand(gravx, gravmask, (XRES/CELL)*(YRES/CELL)*sizeof(float), (XRES/CELL)*(YRES/CELL)*sizeof(unsigned));
		memset(gravmap, 0, (XRES/CELL)*(YRES/CELL)*sizeof(float));
	}
}
Example #3
0
void Gravity::update_grav(void)
{
	int x, y, i, j, changed = 0;
	float val, distance;
	th_gravchanged = 0;
#ifndef GRAV_DIFF
	//Find any changed cells
	for (i=0; i<YRES/CELL; i++)
	{
		if(changed)
			break;
		for (j=0; j<XRES/CELL; j++)
		{
			if(th_ogravmap[i*(XRES/CELL)+j]!=th_gravmap[i*(XRES/CELL)+j]){
				changed = 1;
				break;
			}
		}
	}
	if(!changed)
		goto fin;
	memset(th_gravy, 0, (XRES/CELL)*(YRES/CELL)*sizeof(float));
	memset(th_gravx, 0, (XRES/CELL)*(YRES/CELL)*sizeof(float));
#endif
	th_gravchanged = 1;
	membwand(th_gravmap, gravmask, (XRES/CELL)*(YRES/CELL)*sizeof(float), (XRES/CELL)*(YRES/CELL)*sizeof(unsigned));
	for (i = 0; i < YRES / CELL; i++) {
		for (j = 0; j < XRES / CELL; j++) {
#ifdef GRAV_DIFF
			if (th_ogravmap[i*(XRES/CELL)+j] != th_gravmap[i*(XRES/CELL)+j])
			{
#else
			if (th_gravmap[i*(XRES/CELL)+j] > 0.0001f || th_gravmap[i*(XRES/CELL)+j]<-0.0001f) //Only calculate with populated or changed cells.
			{
#endif
				for (y = 0; y < YRES / CELL; y++) {
					for (x = 0; x < XRES / CELL; x++) {
						if (x == j && y == i)//Ensure it doesn't calculate with itself
							continue;
						distance = sqrt(pow(j - x, 2.0f) + pow(i - y, 2.0f));
#ifdef GRAV_DIFF
						val = th_gravmap[i*(XRES/CELL)+j] - th_ogravmap[i*(XRES/CELL)+j];
#else
						val = th_gravmap[i*(XRES/CELL)+j];
#endif
						th_gravx[y*(XRES/CELL)+x] += M_GRAV * val * (j - x) / pow(distance, 3.0f);
						th_gravy[y*(XRES/CELL)+x] += M_GRAV * val * (i - y) / pow(distance, 3.0f);
						th_gravp[y*(XRES/CELL)+x] += M_GRAV * val / pow(distance, 2.0f);
					}
				}
			}
		}
	}
fin:
	memcpy(th_ogravmap, th_gravmap, (XRES/CELL)*(YRES/CELL)*sizeof(float));
	memcpy(obmap, bmap, (XRES/CELL)*(YRES/CELL)*sizeof(unsigned char));
}
#endif



void Gravity::grav_mask_r(int x, int y, char checkmap[YRES/CELL][XRES/CELL], char shape[YRES/CELL][XRES/CELL], char *shapeout)
{
	if(x < 0 || x >= XRES/CELL || y < 0 || y >= YRES/CELL)
		return;
	if(x == 0 || y ==0 || y == (YRES/CELL)-1 || x == (XRES/CELL)-1)
		*shapeout = 1;

	int x1 = x, x2 = x;
	while (x1 >= 1)
	{
		if(checkmap[y][x1-1] || bmap[y][x1-1]==WL_GRAV)
			break;
		x1--;
	}
	while (x2 < (XRES/CELL)-1)
	{
		if(checkmap[y][x2+1] || bmap[y][x2+1]==WL_GRAV)
			break;
		x2++;
	}

	// fill span
	for (x = x1; x <= x2; x++)
		checkmap[y][x] = shape[y][x] = 1;

	if(y >= 1)
		for(x = x1; x <= x2; x++)
			if(!checkmap[y-1][x] && bmap[y-1][x]!=WL_GRAV)
				grav_mask_r(x, y-1, checkmap, shape, shapeout);
	if(y < (YRES/CELL)-1)
		for(x = x1; x <= x2; x++)
			if(!checkmap[y+1][x] && bmap[y+1][x]!=WL_GRAV)
				grav_mask_r(x, y+1, checkmap, shape, shapeout);
	return;
}
void Gravity::mask_free(mask_el *c_mask_el){
	if(c_mask_el==NULL)
		return;
	if(c_mask_el->next!=NULL)
		mask_free((mask_el*)c_mask_el->next);
	free(c_mask_el->shape);
	free(c_mask_el);
}
void Gravity::gravity_mask()
{
	char checkmap[YRES/CELL][XRES/CELL];
	int x = 0, y = 0;
	unsigned maskvalue;
	mask_el *t_mask_el = NULL;
	mask_el *c_mask_el = NULL;
	if(!gravmask)
		return;
	memset(checkmap, 0, sizeof(checkmap));
	for(x = 0; x < XRES/CELL; x++)
	{
		for(y = 0; y < YRES/CELL; y++)
		{
			if(bmap[y][x]!=WL_GRAV && checkmap[y][x] == 0)
			{
				//Create a new shape
				if(t_mask_el==NULL){
					t_mask_el = (mask_el *)malloc(sizeof(mask_el));
					t_mask_el->shape = (char *)malloc((XRES/CELL)*(YRES/CELL));
					memset(t_mask_el->shape, 0, (XRES/CELL)*(YRES/CELL));
					t_mask_el->shapeout = 0;
					t_mask_el->next = NULL;
					c_mask_el = t_mask_el;
				} else {
					c_mask_el->next = (mask_el *)malloc(sizeof(mask_el));
					c_mask_el = (mask_el *)c_mask_el->next;
					c_mask_el->shape = (char *)malloc((XRES/CELL)*(YRES/CELL));
					memset(c_mask_el->shape, 0, (XRES/CELL)*(YRES/CELL));
					c_mask_el->shapeout = 0;
					c_mask_el->next = NULL;
				}
				//Fill the shape
				grav_mask_r(x, y, (char (*)[XRES/CELL])checkmap, (char (*)[XRES/CELL])c_mask_el->shape, (char*)&c_mask_el->shapeout);
			}
		}
	}
	c_mask_el = t_mask_el;
	memset(gravmask, 0, (XRES/CELL)*(YRES/CELL)*sizeof(unsigned));
	while(c_mask_el!=NULL)
	{
		char *cshape = c_mask_el->shape;
		for(x = 0; x < XRES/CELL; x++)
		{
			for(y = 0; y < YRES/CELL; y++)
			{
				if(cshape[y*(XRES/CELL)+x]){
					if(c_mask_el->shapeout)
						maskvalue = 0xFFFFFFFF;
					else
						maskvalue = 0x00000000;
					gravmask[y*(XRES/CELL)+x] = maskvalue;
				}
			}
		}
		c_mask_el = (mask_el*)c_mask_el->next;
	}
	mask_free(t_mask_el);
}
Example #4
0
void Gravity::update_grav()
{
	int x, y, changed = 0;
	int xblock2 = XRES/CELL*2, yblock2 = YRES/CELL*2;
	int i, fft_tsize = (xblock2/2+1)*yblock2;
	float mr, mc, pr, pc, gr, gc;
	for (y=0; y<YRES/CELL; y++)
	{
		if(changed)
			break;
		for (x=0; x<XRES/CELL; x++)
		{
			if(th_ogravmap[y*(XRES/CELL)+x] != th_gravmap[y*(XRES/CELL)+x] || bmap[y][x] != obmap[y][x]){
				changed = 1;
				break;
			}
		}
	}
	if(changed)
	{
		th_gravchanged = 1;

		membwand(th_gravmap, gravmask, (XRES/CELL)*(YRES/CELL)*sizeof(float), (XRES/CELL)*(YRES/CELL)*sizeof(unsigned));
		//copy gravmap into padded gravmap array
		for (y=0; y<YRES/CELL; y++)
		{
			for (x=0; x<XRES/CELL; x++)
			{
				th_gravmapbig[(y+YRES/CELL)*xblock2+XRES/CELL+x] = th_gravmap[y*(XRES/CELL)+x];
			}
		}
		//transform gravmap
		fftwf_execute(plan_gravmap);
		//do convolution (multiply the complex numbers)
		for (i=0; i<fft_tsize; i++)
		{
			mr = th_gravmapbigt[i][0];
			mc = th_gravmapbigt[i][1];
			pr = th_ptgravxt[i][0];
			pc = th_ptgravxt[i][1];
			gr = mr*pr-mc*pc;
			gc = mr*pc+mc*pr;
			th_gravxbigt[i][0] = gr;
			th_gravxbigt[i][1] = gc;
			pr = th_ptgravyt[i][0];
			pc = th_ptgravyt[i][1];
			gr = mr*pr-mc*pc;
			gc = mr*pc+mc*pr;
			th_gravybigt[i][0] = gr;
			th_gravybigt[i][1] = gc;
		}
		//inverse transform, and copy from padded arrays into normal velocity maps
		fftwf_execute(plan_gravx_inverse);
		fftwf_execute(plan_gravy_inverse);
		for (y=0; y<YRES/CELL; y++)
		{
			for (x=0; x<XRES/CELL; x++)
			{
				th_gravx[y*(XRES/CELL)+x] = th_gravxbig[y*xblock2+x];
				th_gravy[y*(XRES/CELL)+x] = th_gravybig[y*xblock2+x];
				th_gravp[y*(XRES/CELL)+x] = sqrtf(pow(th_gravxbig[y*xblock2+x],2)+pow(th_gravybig[y*xblock2+x],2));
			}
		}
	}
	else
	{
		th_gravchanged = 0;
	}
	memcpy(th_ogravmap, th_gravmap, (XRES/CELL)*(YRES/CELL)*sizeof(float));
	memcpy(obmap, bmap, (XRES/CELL)*(YRES/CELL)*sizeof(unsigned char));
}