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

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intern/cycles/kernel/light/sample.h

Show First 20 Lines • Show All 325 Lines • ▼ Show 20 Lines	ccl_device_inline bool light_sample_from_volume_segment(KernelGlobals kg,
const float time,		const float time,
const float3 P,		const float3 P,
const float3 D,		const float3 D,
const float t,		const float t,
const int bounce,		const int bounce,
const uint32_t path_flag,		const uint32_t path_flag,
ccl_private LightSample *ls)		ccl_private LightSample *ls)
{		{
		/* Select an emitter. */
		int emitter_object = 0;
		int emitter_prim = 0;
		int emitter_shader_flag = 0;
		float emitter_pdf_selection = 0.0f;

if (kernel_data.integrator.use_light_tree) {		if (kernel_data.integrator.use_light_tree) {
return light_tree_sample<true>(		if (!light_tree_sample<true>(kg,
kg, randu, randv, time, P, D, t, SD_BSDF_HAS_TRANSMISSION, bounce, path_flag, ls);		randu,
		randv,
		time,
		P,
		D,
		t,
		SD_BSDF_HAS_TRANSMISSION,
		bounce,
		path_flag,
		&emitter_object,
		&emitter_prim,
		&emitter_shader_flag,
		&emitter_pdf_selection)) {
		return false;
		}
		}
		else {
		if (!light_distribution_sample<true>(kg,
		randu,
		randv,
		time,
		P,
		bounce,
		path_flag,
		&emitter_object,
		&emitter_prim,
		&emitter_shader_flag,
		&emitter_pdf_selection)) {
		return false;
		}
		}

		/* Sample a point on the chosen emitter. */
		if (emitter_prim >= 0) {
		/* Mesh light. */
		/* Exclude synthetic meshes from shadow catcher pass. */
		if ((path_flag & PATH_RAY_SHADOW_CATCHER_PASS) &&
		!(kernel_data_fetch(object_flag, emitter_object) & SD_OBJECT_SHADOW_CATCHER)) {
		return false;
		}

		if (!triangle_light_sample<true>(
		kg, emitter_prim, emitter_object, randu, randv, time, ls, P)) {
		return false;
		}
}		}
else {		else {
return light_distribution_sample<true>(kg, randu, randv, time, P, bounce, path_flag, ls);		/* Light object. */
		const int lamp = ~emitter_prim;

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

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

		/* Exception for triangle light with flat distribution that already sets pdf_selection. */
		if (kernel_data.integrator.use_light_tree \|\| emitter_prim < 0) {
		ls->pdf_selection = emitter_pdf_selection;
		}
		ls->pdf *= ls->pdf_selection;
		ls->shader \|= emitter_shader_flag;

		return (ls->pdf > 0);
}		}

ccl_device bool light_sample_from_position(KernelGlobals kg,		ccl_device bool light_sample_from_position(KernelGlobals kg,
ccl_private const RNGState *rng_state,		ccl_private const RNGState *rng_state,
const float randu,		const float randu,
const float randv,		const float randv,
const float time,		const float time,
const float3 P,		const float3 P,
const float3 N,		const float3 N,
const int shader_flags,		const int shader_flags,
const int bounce,		const int bounce,
const uint32_t path_flag,		const uint32_t path_flag,
ccl_private LightSample *ls)		ccl_private LightSample *ls)
{		{
		/* Select an emitter. */
		int emitter_object = 0;
		int emitter_prim = 0;
		int emitter_shader_flag = 0;
		float emitter_pdf_selection = 0.0f;

if (kernel_data.integrator.use_light_tree) {		if (kernel_data.integrator.use_light_tree) {
return light_tree_sample<false>(		if (!light_tree_sample<false>(kg,
kg, randu, randv, time, P, N, 0, shader_flags, bounce, path_flag, ls);		randu,
		randv,
		time,
		P,
		N,
		0,
		shader_flags,
		bounce,
		path_flag,
		&emitter_object,
		&emitter_prim,
		&emitter_shader_flag,
		&emitter_pdf_selection)) {
		return false;
		}
		}
		else {
		if (!light_distribution_sample<false>(kg,
		randu,
		randv,
		time,
		P,
		bounce,
		path_flag,
		&emitter_object,
		&emitter_prim,
		&emitter_shader_flag,
		&emitter_pdf_selection)) {
		return false;
		}
		}

		/* Sample a point on the chosen emitter.
		* TODO: deduplicate code with light_sample_from_volume_segment? */
		if (emitter_prim >= 0) {
		/* Mesh light. */
		/* Exclude synthetic meshes from shadow catcher pass. */
		if ((path_flag & PATH_RAY_SHADOW_CATCHER_PASS) &&
		!(kernel_data_fetch(object_flag, emitter_object) & SD_OBJECT_SHADOW_CATCHER)) {
		return false;
		}

		if (!triangle_light_sample<false>(
		kg, emitter_prim, emitter_object, randu, randv, time, ls, P)) {
		return false;
		}
}		}
else {		else {
return light_distribution_sample<false>(kg, randu, randv, time, P, bounce, path_flag, ls);		/* Light object. */
		const int lamp = ~emitter_prim;

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

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

		/* Exception for triangle light with flat distribution that already sets pdf_selection. */
		if (kernel_data.integrator.use_light_tree \|\| emitter_prim < 0) {
		ls->pdf_selection = emitter_pdf_selection;
		}
		ls->pdf *= ls->pdf_selection;
		ls->shader \|= emitter_shader_flag;

		return (ls->pdf > 0);
}		}

ccl_device_inline bool light_sample_new_position(KernelGlobals kg,		ccl_device_inline bool light_sample_new_position(KernelGlobals kg,
const float randu,		const float randu,
const float randv,		const float randv,
const float time,		const float time,
const float3 P,		const float3 P,
ccl_private LightSample *ls)		ccl_private LightSample *ls)
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