Differential D1996 Diff 6676 intern/cycles/kernel/kernel_shadow.h

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intern/cycles/kernel/kernel_shadow.h

Show First 20 Lines • Show All 53 Lines • ▼ Show 20 Lines	if(kernel_data.integrator.transparent_shadows) {
/* check transparent bounces here, for volume scatter which can do		/* check transparent bounces here, for volume scatter which can do
* lighting before surface path termination is checked */		* lighting before surface path termination is checked */
if(state->transparent_bounce >= kernel_data.integrator.transparent_max_bounce)		if(state->transparent_bounce >= kernel_data.integrator.transparent_max_bounce)
return true;		return true;

/* intersect to find an opaque surface, or record all transparent surface hits */		/* intersect to find an opaque surface, or record all transparent surface hits */
Intersection hits_stack[STACK_MAX_HITS];		Intersection hits_stack[STACK_MAX_HITS];
Intersection *hits = hits_stack;		Intersection *hits = hits_stack;
uint max_hits = kernel_data.integrator.transparent_max_bounce - state->transparent_bounce - 1;		const int transparent_max_bounce = kernel_data.integrator.transparent_max_bounce;
		uint max_hits = transparent_max_bounce - state->transparent_bounce - 1;

/* prefer to use stack but use dynamic allocation if too deep max hits		/* prefer to use stack but use dynamic allocation if too deep max hits
* we need max_hits + 1 storage space due to the logic in		* we need max_hits + 1 storage space due to the logic in
* scene_intersect_shadow_all which will first store and then check if		* scene_intersect_shadow_all which will first store and then check if
* the limit is exceeded */		* the limit is exceeded */
if(max_hits + 1 > STACK_MAX_HITS)		if(max_hits + 1 > STACK_MAX_HITS) {
hits = (Intersection)malloc(sizeof(Intersection)(max_hits + 1));		if(kg->transparent_shadow_intersections == NULL) {
		kg->transparent_shadow_intersections =
		(Intersection)malloc(sizeof(Intersection)(transparent_max_bounce + 1));
		}
		brechtUnsubmitted Not Done Inline Actions We need to reallocate if `max_hits` is larger than the previously allocated `max_hits`? Or maybe just allocate with size `kernel_data.integrator.transparent_max_bounce` immediately. brecht: We need to reallocate if `max_hits` is larger than the previously allocated `max_hits`? Or…
		sergeyAuthorUnsubmitted Not Done Inline Actions Uh, the intention was to allocate `transparent_max_bounce` intersections straight away. Doing re-allocations is more costly that 1024 preallocated hits. That's a good catch :) sergey: Uh, the intention was to allocate `transparent_max_bounce` intersections straight away. Doing…
		hits = kg->transparent_shadow_intersections;
		}

uint num_hits;		uint num_hits;
blocked = scene_intersect_shadow_all(kg, ray, hits, max_hits, &num_hits);		blocked = scene_intersect_shadow_all(kg, ray, hits, max_hits, &num_hits);

/* if no opaque surface found but we did find transparent hits, shade them */		/* if no opaque surface found but we did find transparent hits, shade them */
if(!blocked && num_hits > 0) {		if(!blocked && num_hits > 0) {
float3 throughput = make_float3(1.0f, 1.0f, 1.0f);		float3 throughput = make_float3(1.0f, 1.0f, 1.0f);
float3 Pend = ray->P + ray->D*ray->t;		float3 Pend = ray->P + ray->D*ray->t;
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#ifdef __VOLUME__		#ifdef __VOLUME__
/* attenuation for last line segment towards light */		/* attenuation for last line segment towards light */
if(ps.volume_stack[0].shader != SHADER_NONE)		if(ps.volume_stack[0].shader != SHADER_NONE)
kernel_volume_shadow(kg, &ps, ray, &throughput);		kernel_volume_shadow(kg, &ps, ray, &throughput);
#endif		#endif

*shadow = throughput;		*shadow = throughput;

if(hits != hits_stack)
free(hits);
return is_zero(throughput);		return is_zero(throughput);
}		}

/* free dynamic storage */
if(hits != hits_stack)
free(hits);
}		}
else {		else {
Intersection isect;		Intersection isect;
blocked = scene_intersect(kg, ray, PATH_RAY_SHADOW_OPAQUE, &isect, NULL, 0.0f, 0.0f);		blocked = scene_intersect(kg, ray, PATH_RAY_SHADOW_OPAQUE, &isect, NULL, 0.0f, 0.0f);
}		}

#ifdef __VOLUME__		#ifdef __VOLUME__
if(!blocked && state->volume_stack[0].shader != SHADER_NONE) {		if(!blocked && state->volume_stack[0].shader != SHADER_NONE) {
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