Differential D1264 Diff 4081 intern/cycles/kernel/kernel_volume.h

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intern/cycles/kernel/kernel_volume.h

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	Ray *ray,	Ray *ray,
	VolumeStack *stack)	VolumeStack *stack)
	{	{
		#define MAX_VOLUME_HITS (2*VOLUME_STACK_SIZE)
	/* NULL ray happens in the baker, does it need proper initialization of	/* NULL ray happens in the baker, does it need proper initialization of
	* camera in volume?	* camera in volume?
	*/	*/
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	volume_ray.t = FLT_MAX;	volume_ray.t = FLT_MAX;

	int stack_index = 0, enclosed_index = 0;	int stack_index = 0, enclosed_index = 0;
	int enclosed_volumes[VOLUME_STACK_SIZE];	Intersection hits[MAX_VOLUME_HITS];
	int step = 0;	uint num_hits = scene_intersect_volume_all(kg,
		&volume_ray,
	while(stack_index < VOLUME_STACK_SIZE - 1 &&	hits,
	enclosed_index < VOLUME_STACK_SIZE - 1 &&	MAX_VOLUME_HITS);
	step < 2 * VOLUME_STACK_SIZE)	if(num_hits > 0) {
	{	int enclosed_volumes[VOLUME_STACK_SIZE];
	Intersection isect;	Intersection *isect = hits;
	if(!scene_intersect_volume(kg, &volume_ray, &isect)) {
	break;	for(uint hit = 0; hit < num_hits; ++hit, ++isect) {
	}	ShaderData sd;
		shader_setup_from_ray(kg, &sd, isect, &volume_ray, 0, 0);
	ShaderData sd;	if(sd.flag & SD_BACKFACING) {
	shader_setup_from_ray(kg, &sd, &isect, &volume_ray, 0, 0);	/* If ray exited the volume and never entered to that volume
	if(sd.flag & SD_BACKFACING) {	* it means that camera is inside such a volume.
	/* If ray exited the volume and never entered to that volume	*/
	* it means that camera is inside such a volume.	bool is_enclosed = false;
	*/	for(int i = 0; i < enclosed_index; ++i) {
	bool is_enclosed = false;	if(enclosed_volumes[i] == sd.object) {
	for(int i = 0; i < enclosed_index; ++i) {	is_enclosed = true;
	if(enclosed_volumes[i] == sd.object) {	break;
	is_enclosed = true;	}
	break;	}
		if(is_enclosed == false) {
		stack[stack_index].object = sd.object;
		stack[stack_index].shader = sd.shader;
		++stack_index;
	}	}
	}	}
	if(is_enclosed == false) {	else {
	stack[stack_index].object = sd.object;	/* If ray from camera enters the volume, this volume shouldn't
	stack[stack_index].shader = sd.shader;	* be added to the stack on exit.
	++stack_index;	*/
		enclosed_volumes[enclosed_index++] = sd.object;
	}	}
	}	}
	else {
	/* If ray from camera enters the volume, this volume shouldn't
	* be added to the stack on exit.
	*/
	enclosed_volumes[enclosed_index++] = sd.object;
	}

	/* Move ray forward. */
	volume_ray.P = ray_offset(sd.P, -sd.Ng);
	++step;
	}	}
	/* stack_index of 0 means quick checks outside of the kernel gave false	/* stack_index of 0 means quick checks outside of the kernel gave false
	* positive, nothing to worry about, just we've wasted quite a few of	* positive, nothing to worry about, just we've wasted quite a few of
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	else {	else {
	stack[stack_index].shader = SHADER_NONE;	stack[stack_index].shader = SHADER_NONE;
	}	}
		#undef MAX_VOLUME_HITS
	}	}

	ccl_device void kernel_volume_stack_enter_exit(KernelGlobals kg, ShaderData sd, VolumeStack *stack)	ccl_device void kernel_volume_stack_enter_exit(KernelGlobals kg, ShaderData sd, VolumeStack *stack)
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