Differential D16655 Diff 58191 intern/cycles/kernel/light/distribution.h

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intern/cycles/kernel/light/distribution.h

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	template<bool in_volume_segment>			template<bool in_volume_segment>
	ccl_device_noinline bool light_distribution_sample(KernelGlobals kg,			ccl_device_noinline bool light_distribution_sample(KernelGlobals kg,
	float randu,			float randu,
	const float randv,			const float randv,
	const float time,			const float time,
	const float3 P,			const float3 P,
	const int bounce,			const int bounce,
	const uint32_t path_flag,			const uint32_t path_flag,
	ccl_private LightSample *ls)			ccl_private int *emitter_object,
				ccl_private int *emitter_prim,
				ccl_private int *emitter_shader_flag,
				ccl_private float *emitter_pdf_selection)
	{			{
	/* Sample light index from distribution. */			/* Sample light index from distribution. */
	const int index = light_distribution_sample(kg, &randu);			const int index = light_distribution_sample(kg, &randu);
	ccl_global const KernelLightDistribution *kdistribution = &kernel_data_fetch(light_distribution,			ccl_global const KernelLightDistribution *kdistribution = &kernel_data_fetch(light_distribution,
	index);			index);
	const int prim = kdistribution->prim;

	if (prim >= 0) {			*emitter_prim = kdistribution->prim;
	/* Mesh light. */			*emitter_object = kdistribution->mesh_light.object_id;
	const int object = kdistribution->mesh_light.object_id;			*emitter_shader_flag = kdistribution->mesh_light.shader_flag;
				*emitter_pdf_selection = kernel_data.integrator.distribution_pdf_lights;
	/* Exclude synthetic meshes from shadow catcher pass. */
	if ((path_flag & PATH_RAY_SHADOW_CATCHER_PASS) &&
	!(kernel_data_fetch(object_flag, object) & SD_OBJECT_SHADOW_CATCHER)) {
	return false;
	}

	const int shader_flag = kdistribution->mesh_light.shader_flag;
	triangle_light_sample<in_volume_segment>(kg, prim, object, randu, randv, time, ls, P);
	ls->shader \|= shader_flag;
	return (ls->pdf > 0.0f);
	}

	const int lamp = -prim - 1;

	if (UNLIKELY(light_select_reached_max_bounces(kg, lamp, bounce))) {
	return false;
	}

	if (!light_sample<in_volume_segment>(kg, lamp, randu, randv, P, path_flag, ls)) {
	return false;
	}

	ls->pdf_selection = kernel_data.integrator.distribution_pdf_lights;
	ls->pdf *= ls->pdf_selection;

	return true;			return true;
	}			}

	ccl_device_inline float light_distribution_pdf_lamp(KernelGlobals kg)			ccl_device_inline float light_distribution_pdf_lamp(KernelGlobals kg)
	{			{
	return kernel_data.integrator.distribution_pdf_lights;			return kernel_data.integrator.distribution_pdf_lights;
	}			}

	CCL_NAMESPACE_END			CCL_NAMESPACE_END