Differential D13093 Diff 44329 intern/cycles/kernel/integrator/intersect_closest.h

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intern/cycles/kernel/integrator/intersect_closest.h

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#include "kernel/util/differential.h"		#include "kernel/util/differential.h"

#include "kernel/geom/geom.h"		#include "kernel/geom/geom.h"

#include "kernel/bvh/bvh.h"		#include "kernel/bvh/bvh.h"

CCL_NAMESPACE_BEGIN		CCL_NAMESPACE_BEGIN

template<uint32_t current_kernel>
ccl_device_forceinline bool integrator_intersect_terminate(KernelGlobals kg,		ccl_device_forceinline bool integrator_intersect_terminate(KernelGlobals kg,
IntegratorState state,		IntegratorState state,
const int shader_flags)		const int shader_flags)
{		{

/* Optional AO bounce termination.		/* Optional AO bounce termination.
* We continue evaluating emissive/transparent surfaces and volumes, similar		* We continue evaluating emissive/transparent surfaces and volumes, similar
* to direct lighting. Only if we know there are none can we terminate the		* to direct lighting. Only if we know there are none can we terminate the
Show All 37 Lines	if (probability == 0.0f \|\| terminate >= probability) {
return true;		return true;
}		}
}		}
}		}

return false;		return false;
}		}

/* Note that current_kernel is a template value since making this a variable		/* Schedule next kernel to be executed after intersect closest.
		*
		* Returns true if shadow catcher is possible after this.
		*
		* Note that current_kernel is a template value since making this a variable
* leads to poor performance with CUDA atomics. */		* leads to poor performance with CUDA atomics. */
template<uint32_t current_kernel>		template<uint32_t current_kernel>
ccl_device_forceinline void integrator_intersect_shader_next_kernel(		ccl_device_forceinline bool integrator_intersect_next_kernel(
KernelGlobals kg,		KernelGlobals kg,
IntegratorState state,		IntegratorState state,
ccl_private const Intersection *ccl_restrict isect,		ccl_private const Intersection *ccl_restrict isect,
const int shader,		const bool hit)
const int shader_flags)
{		{
/* Note on scheduling.		/* Continue with volume kernel if we are inside a volume, regardless if we hit anything. */
*		#ifdef __VOLUME__
* When there is no shadow catcher split the scheduling is simple: schedule surface shading with		if (!integrator_state_volume_stack_is_empty(kg, state)) {
* or without raytrace support, depending on the shader used.		const bool hit_surface = hit && !(isect->type & PRIMITIVE_LAMP);
*		const int shader = (hit_surface) ? intersection_get_shader(kg, isect) : SHADER_NONE;
* When there is a shadow catcher split the general idea is to have the following configuration:		const int flags = (hit_surface) ? kernel_tex_fetch(__shaders, shader).flags : 0;
*
* - Schedule surface shading kernel (with corresponding raytrace support) for the ray which		if (!integrator_intersect_terminate(kg, state, flags)) {
* will trace shadow catcher object.		INTEGRATOR_PATH_NEXT(current_kernel, DEVICE_KERNEL_INTEGRATOR_SHADE_VOLUME);
*		return hit_surface;
* - When no alpha-over of approximate shadow catcher is needed, schedule surface shading for		}
* the matte ray.		else {
*		INTEGRATOR_PATH_TERMINATE(current_kernel);
* - Otherwise schedule background shading kernel, so that we have a background to alpha-over		return false;
* on. The background kernel will then schedule surface shading for the matte ray.		}
*		}
* Note that the splitting leaves kernel and sorting counters as-is, so use INIT semantic for		#endif
* the matte path. */

const bool use_raytrace_kernel = (shader_flags & SD_HAS_RAYTRACE);		if (hit) {
		/* Hit a surface, continue with light or surface kernel. */
		if (isect->type & PRIMITIVE_LAMP) {
		INTEGRATOR_PATH_NEXT(current_kernel, DEVICE_KERNEL_INTEGRATOR_SHADE_LIGHT);
		return false;
		}
		else {
		/* Hit a surface, continue with surface kernel unless terminated. */
		const int shader = intersection_get_shader(kg, isect);
		const int flags = kernel_tex_fetch(__shaders, shader).flags;

		if (!integrator_intersect_terminate(kg, state, flags)) {
		const bool use_raytrace_kernel = (flags & SD_HAS_RAYTRACE);
if (use_raytrace_kernel) {		if (use_raytrace_kernel) {
INTEGRATOR_PATH_NEXT_SORTED(		INTEGRATOR_PATH_NEXT_SORTED(
current_kernel, DEVICE_KERNEL_INTEGRATOR_SHADE_SURFACE_RAYTRACE, shader);		current_kernel, DEVICE_KERNEL_INTEGRATOR_SHADE_SURFACE_RAYTRACE, shader);
}		}
else {		else {
INTEGRATOR_PATH_NEXT_SORTED(current_kernel, DEVICE_KERNEL_INTEGRATOR_SHADE_SURFACE, shader);		INTEGRATOR_PATH_NEXT_SORTED(
		current_kernel, DEVICE_KERNEL_INTEGRATOR_SHADE_SURFACE, shader);
		}
		return true;
		}
		else {
		INTEGRATOR_PATH_TERMINATE(current_kernel);
		return false;
		}
		}
		}
		else {
		/* Nothing hit, continue with background kernel. */
		INTEGRATOR_PATH_NEXT(current_kernel, DEVICE_KERNEL_INTEGRATOR_SHADE_BACKGROUND);
		return false;
		}
		}

		/* Schedule next kernel to be executed after shade volume.
		*
		* The logic here matches integrator_intersect_next_kernel, except that
		* volume shading and termination testing have already been done. */
		template<uint32_t current_kernel>
		ccl_device_forceinline void integrator_intersect_next_kernel_after_volume(
		KernelGlobals kg, IntegratorState state, ccl_private const Intersection *ccl_restrict isect)
		{
		if (isect->prim != PRIM_NONE) {
		/* Hit a surface, continue with light or surface kernel. */
		if (isect->type & PRIMITIVE_LAMP) {
		INTEGRATOR_PATH_NEXT(current_kernel, DEVICE_KERNEL_INTEGRATOR_SHADE_LIGHT);
		return;
		}
		else {
		/* Hit a surface, continue with surface kernel unless terminated. */
		const int shader = intersection_get_shader(kg, isect);
		const int flags = kernel_tex_fetch(__shaders, shader).flags;
		const bool use_raytrace_kernel = (flags & SD_HAS_RAYTRACE);

		if (use_raytrace_kernel) {
		INTEGRATOR_PATH_NEXT_SORTED(
		current_kernel, DEVICE_KERNEL_INTEGRATOR_SHADE_SURFACE_RAYTRACE, shader);
		}
		else {
		INTEGRATOR_PATH_NEXT_SORTED(
		current_kernel, DEVICE_KERNEL_INTEGRATOR_SHADE_SURFACE, shader);
		}
		return;
		}
		}
		else {
		/* Nothing hit, continue with background kernel. */
		INTEGRATOR_PATH_NEXT(current_kernel, DEVICE_KERNEL_INTEGRATOR_SHADE_BACKGROUND);
		return;
		}
}		}

#ifdef __SHADOW_CATCHER__		#ifdef __SHADOW_CATCHER__
		/* Split path if a shadow catcher was hit. */
		ccl_device_forceinline void integrator_split_shadow_catcher(
		KernelGlobals kg, IntegratorState state, ccl_private const Intersection *ccl_restrict isect)
		{
		/* Test if we hit a shadow catcher object, and potentially split the path to continue tracing two
		* paths from here. */
const int object_flags = intersection_get_object_flags(kg, isect);		const int object_flags = intersection_get_object_flags(kg, isect);
if (kernel_shadow_catcher_split(kg, state, object_flags)) {		if (!kernel_shadow_catcher_split(kg, state, object_flags)) {
		return;
		}

		/* If we did split, the other path will continue as usual. For this path, we will ignore any
		* intersections with non-shadow catcher objects.
		*
		* Note that the splitting leaves kernel and sorting counters as-is, so use INIT semantic for
		* the matte path. */
if (kernel_data.film.pass_background != PASS_UNUSED && !kernel_data.background.transparent) {		if (kernel_data.film.pass_background != PASS_UNUSED && !kernel_data.background.transparent) {
		/* If using background pass, schedule background shading kernel so that we have a background
		* to alpha-over on. The background kernel will then continue the path afterwards. */
INTEGRATOR_STATE_WRITE(state, path, flag) \|= PATH_RAY_SHADOW_CATCHER_BACKGROUND;		INTEGRATOR_STATE_WRITE(state, path, flag) \|= PATH_RAY_SHADOW_CATCHER_BACKGROUND;

INTEGRATOR_PATH_INIT(DEVICE_KERNEL_INTEGRATOR_SHADE_BACKGROUND);		INTEGRATOR_PATH_INIT(DEVICE_KERNEL_INTEGRATOR_SHADE_BACKGROUND);
		return;
		}

		if (!integrator_state_volume_stack_is_empty(kg, state)) {
		/* Volume stack is not empty. Re-init the volume stack to exclude any non-shadow catcher
		* objects from it, and then continue shading volume and shadow catcher surface after. */
		INTEGRATOR_PATH_INIT(DEVICE_KERNEL_INTEGRATOR_INTERSECT_VOLUME_STACK);
		return;
}		}
else if (use_raytrace_kernel) {
		/* Continue with shading shadow catcher surface. */
		const int shader = intersection_get_shader(kg, isect);
		const int flags = kernel_tex_fetch(__shaders, shader).flags;
		const bool use_raytrace_kernel = (flags & SD_HAS_RAYTRACE);

		if (use_raytrace_kernel) {
INTEGRATOR_PATH_INIT_SORTED(DEVICE_KERNEL_INTEGRATOR_SHADE_SURFACE_RAYTRACE, shader);		INTEGRATOR_PATH_INIT_SORTED(DEVICE_KERNEL_INTEGRATOR_SHADE_SURFACE_RAYTRACE, shader);
}		}
else {		else {
INTEGRATOR_PATH_INIT_SORTED(DEVICE_KERNEL_INTEGRATOR_SHADE_SURFACE, shader);		INTEGRATOR_PATH_INIT_SORTED(DEVICE_KERNEL_INTEGRATOR_SHADE_SURFACE, shader);
}		}
}		}
#endif
		/* Schedule next kernel to be executed after updating volume stack for shadow catcher. */
		template<uint32_t current_kernel>
		ccl_device_forceinline void integrator_intersect_next_kernel_after_shadow_catcher_volume(
		KernelGlobals kg, IntegratorState state)
		{
		/* Continue with shading shadow catcher surface. Same as integrator_split_shadow_catcher, but
		* using NEXT instead of INIT. */
		Intersection isect ccl_optional_struct_init;
		integrator_state_read_isect(kg, state, &isect);

		const int shader = intersection_get_shader(kg, &isect);
		const int flags = kernel_tex_fetch(__shaders, shader).flags;
		const bool use_raytrace_kernel = (flags & SD_HAS_RAYTRACE);

		if (use_raytrace_kernel) {
		INTEGRATOR_PATH_NEXT_SORTED(
		current_kernel, DEVICE_KERNEL_INTEGRATOR_SHADE_SURFACE_RAYTRACE, shader);
		}
		else {
		INTEGRATOR_PATH_NEXT_SORTED(current_kernel, DEVICE_KERNEL_INTEGRATOR_SHADE_SURFACE, shader);
		}
		}

		/* Schedule next kernel to be executed after executing background shader for shadow catcher. */
		template<uint32_t current_kernel>
		ccl_device_forceinline void integrator_intersect_next_kernel_after_shadow_catcher_background(
		KernelGlobals kg, IntegratorState state)
		{
		/* Same logic as integrator_split_shadow_catcher, but using NEXT instead of INIT. */
		if (!integrator_state_volume_stack_is_empty(kg, state)) {
		/* Volume stack is not empty. Re-init the volume stack to exclude any non-shadow catcher
		* objects from it, and then continue shading volume and shadow catcher surface after. */
		INTEGRATOR_PATH_NEXT(current_kernel, DEVICE_KERNEL_INTEGRATOR_INTERSECT_VOLUME_STACK);
		return;
}		}

		/* Continue with shading shadow catcher surface. */
		integrator_intersect_next_kernel_after_shadow_catcher_volume<current_kernel>(kg, state);
		}
		#endif

ccl_device void integrator_intersect_closest(KernelGlobals kg, IntegratorState state)		ccl_device void integrator_intersect_closest(KernelGlobals kg, IntegratorState state)
{		{
PROFILING_INIT(kg, PROFILING_INTERSECT_CLOSEST);		PROFILING_INIT(kg, PROFILING_INTERSECT_CLOSEST);

/* Read ray from integrator state into local memory. */		/* Read ray from integrator state into local memory. */
Ray ray ccl_optional_struct_init;		Ray ray ccl_optional_struct_init;
integrator_state_read_ray(kg, state, &ray);		integrator_state_read_ray(kg, state, &ray);
kernel_assert(ray.t != 0.0f);		kernel_assert(ray.t != 0.0f);
Show All 33 Lines	if (kernel_data.integrator.use_lamp_mis) {
hit = lights_intersect(		hit = lights_intersect(
kg, &ray, &isect, last_isect_prim, last_isect_object, last_type, path_flag) \|\|		kg, &ray, &isect, last_isect_prim, last_isect_object, last_type, path_flag) \|\|
hit;		hit;
}		}

/* Write intersection result into global integrator state memory. */		/* Write intersection result into global integrator state memory. */
integrator_state_write_isect(kg, state, &isect);		integrator_state_write_isect(kg, state, &isect);

#ifdef __VOLUME__		/* Setup up next kernel to be executed. */
if (!integrator_state_volume_stack_is_empty(kg, state)) {		if (integrator_intersect_next_kernel<DEVICE_KERNEL_INTEGRATOR_INTERSECT_CLOSEST>(
const bool hit_surface = hit && !(isect.type & PRIMITIVE_LAMP);		kg, state, &isect, hit)) {
const int shader = (hit_surface) ? intersection_get_shader(kg, &isect) : SHADER_NONE;		#ifdef __SHADOW_CATCHER__
const int flags = (hit_surface) ? kernel_tex_fetch(__shaders, shader).flags : 0;		/* Handle shadow catcher. */
		integrator_split_shadow_catcher(kg, state, &isect);
if (!integrator_intersect_terminate<DEVICE_KERNEL_INTEGRATOR_INTERSECT_CLOSEST>(
kg, state, flags)) {
/* Continue with volume kernel if we are inside a volume, regardless
* if we hit anything. */
INTEGRATOR_PATH_NEXT(DEVICE_KERNEL_INTEGRATOR_INTERSECT_CLOSEST,
DEVICE_KERNEL_INTEGRATOR_SHADE_VOLUME);
}
else {
INTEGRATOR_PATH_TERMINATE(DEVICE_KERNEL_INTEGRATOR_INTERSECT_CLOSEST);
}
return;
}
#endif		#endif

if (hit) {
/* Hit a surface, continue with light or surface kernel. */
if (isect.type & PRIMITIVE_LAMP) {
INTEGRATOR_PATH_NEXT(DEVICE_KERNEL_INTEGRATOR_INTERSECT_CLOSEST,
DEVICE_KERNEL_INTEGRATOR_SHADE_LIGHT);
return;
}
else {
/* Hit a surface, continue with surface kernel unless terminated. */
const int shader = intersection_get_shader(kg, &isect);
const int flags = kernel_tex_fetch(__shaders, shader).flags;

if (!integrator_intersect_terminate<DEVICE_KERNEL_INTEGRATOR_INTERSECT_CLOSEST>(
kg, state, flags)) {
integrator_intersect_shader_next_kernel<DEVICE_KERNEL_INTEGRATOR_INTERSECT_CLOSEST>(
kg, state, &isect, shader, flags);
return;
}
else {
INTEGRATOR_PATH_TERMINATE(DEVICE_KERNEL_INTEGRATOR_INTERSECT_CLOSEST);
return;
}
}
}
else {
/* Nothing hit, continue with background kernel. */
INTEGRATOR_PATH_NEXT(DEVICE_KERNEL_INTEGRATOR_INTERSECT_CLOSEST,
DEVICE_KERNEL_INTEGRATOR_SHADE_BACKGROUND);
return;
}		}
}		}

CCL_NAMESPACE_END		CCL_NAMESPACE_END