sample.h File Reference

#include "kernel/integrator/surface_shader.h"
#include "kernel/light/distribution.h"
#include "kernel/light/light.h"
#include "kernel/types.h"
#include "kernel/geom/shader_data.h"
#include "kernel/sample/mis.h"

Go to the source code of this file.

Functions
CCL_NAMESPACE_BEGIN ccl_device_noinline_cpu Spectrum	light_sample_shader_eval (KernelGlobals kg, IntegratorState state, ccl_private ShaderData *ccl_restrict emission_sd, ccl_private LightSample *ccl_restrict ls, const float time)
ccl_device_inline bool	light_sample_terminate (KernelGlobals kg, ccl_private BsdfEval *ccl_restrict eval, const float rand_terminate)
ccl_device_inline float3	shadow_ray_smooth_surface_offset (KernelGlobals kg, const ccl_private ShaderData *ccl_restrict sd, const float3 Ng)
ccl_device_inline float3	shadow_ray_offset (KernelGlobals kg, const ccl_private ShaderData *ccl_restrict sd, const float3 L, ccl_private bool *r_skip_self)
ccl_device_inline void	shadow_ray_setup (const ccl_private ShaderData *ccl_restrict sd, const ccl_private LightSample *ccl_restrict ls, const float3 P, ccl_private Ray *ray, const bool skip_self)
ccl_device_inline void	light_sample_to_surface_shadow_ray (KernelGlobals kg, const ccl_private ShaderData *ccl_restrict sd, const ccl_private LightSample *ccl_restrict ls, ccl_private Ray *ray)
ccl_device_inline void	light_sample_to_volume_shadow_ray (const ccl_private ShaderData *ccl_restrict sd, const ccl_private LightSample *ccl_restrict ls, const float3 P, ccl_private Ray *ray)
ccl_device_inline float	light_sample_mis_weight_forward (KernelGlobals kg, const float forward_pdf, const float nee_pdf)
ccl_device_inline float	light_sample_mis_weight_nee (KernelGlobals kg, const float nee_pdf, const float forward_pdf)
ccl_device_inline bool	light_sample_from_volume_segment (KernelGlobals kg, const float3 rand, const float time, const float3 P, const float3 D, const float t, const int object_receiver, const int bounce, const uint32_t path_flag, ccl_private LightSample *ls)
ccl_device bool	light_sample_from_position (KernelGlobals kg, const float3 rand, const float time, const float3 P, const float3 N, const int object_receiver, const int shader_flags, const int bounce, const uint32_t path_flag, ccl_private LightSample *ls)
ccl_device_forceinline void	light_sample_update (KernelGlobals kg, ccl_private LightSample *ls, const float3 P, const float3 N, const uint32_t path_flag)
ccl_device_inline float	light_sample_mis_weight_forward_surface (KernelGlobals kg, IntegratorState state, const uint32_t path_flag, const ccl_private ShaderData *sd)
ccl_device_inline float	light_sample_mis_weight_forward_lamp (KernelGlobals kg, IntegratorState state, const uint32_t path_flag, const ccl_private LightSample *ls, const float3 P)
ccl_device_inline float	light_sample_mis_weight_forward_distant (KernelGlobals kg, IntegratorState state, const uint32_t path_flag, const ccl_private LightSample *ls)
ccl_device_inline float	light_sample_mis_weight_forward_background (KernelGlobals kg, IntegratorState state, const uint32_t path_flag)

Function Documentation

light_sample_from_position()

ccl_device bool light_sample_from_position	(	KernelGlobals	kg,
		const float3	rand,
		const float	time,
		const float3	P,
		const float3	N,
		const int	object_receiver,
		const int	shader_flags,
		const int	bounce,
		const uint32_t	path_flag,
		ccl_private LightSample *	ls )

Definition at line 357 of file cycles/kernel/light/sample.h.

References ccl_device, ccl_private, kernel_data, light_distribution_sample(), light_sample(), light_tree_sample(), N, P, and float3::z.

Referenced by integrate_surface_direct_light().

light_sample_from_volume_segment()

ccl_device_inline bool light_sample_from_volume_segment	(	KernelGlobals	kg,
		const float3	rand,
		const float	time,
		const float3	P,
		const float3	D,
		const float	t,
		const int	object_receiver,
		const int	bounce,
		const uint32_t	path_flag,
		ccl_private LightSample *	ls )

Definition at line 325 of file cycles/kernel/light/sample.h.

References ccl_device_inline, ccl_private, D, kernel_data, light_distribution_sample(), light_sample(), light_tree_sample(), P, SD_BSDF_HAS_TRANSMISSION, and float3::z.

light_sample_mis_weight_forward()

ccl_device_inline float light_sample_mis_weight_forward	(	KernelGlobals	kg,
		const float	forward_pdf,
		const float	nee_pdf )

Definition at line 281 of file cycles/kernel/light/sample.h.

References ccl_device_inline, DIRECT_LIGHT_SAMPLING_FORWARD, DIRECT_LIGHT_SAMPLING_NEE, kernel_data, and power_heuristic().

Referenced by light_sample_mis_weight_forward_background(), light_sample_mis_weight_forward_lamp(), and light_sample_mis_weight_forward_surface().

light_sample_mis_weight_forward_background()

ccl_device_inline float light_sample_mis_weight_forward_background	(	KernelGlobals	kg,
		IntegratorState	state,
		const uint32_t	path_flag )

Definition at line 512 of file cycles/kernel/light/sample.h.

References background_light_pdf(), ccl_device_inline, D, INTEGRATOR_STATE, kernel_data, kernel_data_fetch, light_distribution_pdf_lamp(), light_link_receiver_forward(), light_sample_mis_weight_forward(), light_tree_pdf(), N, P, PATH_RAY_MIS_SKIP, and state.

Referenced by integrate_background().

light_sample_mis_weight_forward_distant()

ccl_device_inline float light_sample_mis_weight_forward_distant	(	KernelGlobals	kg,
		IntegratorState	state,
		const uint32_t	path_flag,
		const ccl_private LightSample *	ls )

Definition at line 503 of file cycles/kernel/light/sample.h.

References ccl_device_inline, ccl_private, INTEGRATOR_STATE, light_sample_mis_weight_forward_lamp(), P, and state.

Referenced by integrate_distant_lights().

light_sample_mis_weight_forward_lamp()

ccl_device_inline float light_sample_mis_weight_forward_lamp	(	KernelGlobals	kg,
		IntegratorState	state,
		const uint32_t	path_flag,
		const ccl_private LightSample *	ls,
		const float3	P )

Definition at line 467 of file cycles/kernel/light/sample.h.

References ccl_device_inline, ccl_private, INTEGRATOR_STATE, kernel_data, kernel_data_fetch, light_distribution_pdf_lamp(), light_link_receiver_forward(), light_sample_mis_weight_forward(), light_tree_pdf(), N, P, PATH_RAY_MIS_SKIP, and state.

Referenced by integrate_light(), and light_sample_mis_weight_forward_distant().

light_sample_mis_weight_forward_surface()

ccl_device_inline float light_sample_mis_weight_forward_surface	(	KernelGlobals	kg,
		IntegratorState	state,
		const uint32_t	path_flag,
		const ccl_private ShaderData *	sd )

Definition at line 423 of file cycles/kernel/light/sample.h.

References ccl_device_inline, ccl_private, INTEGRATOR_STATE, kernel_data, kernel_data_fetch, light_link_receiver_forward(), light_sample_mis_weight_forward(), light_tree_pdf(), N, P, PATH_RAY_MIS_SKIP, PRIMITIVE_TRIANGLE, SD_BACKFACING, SD_MIS_BACK, SD_MIS_FRONT, state, and triangle_light_pdf().

Referenced by integrate_surface_emission().

light_sample_mis_weight_nee()

ccl_device_inline float light_sample_mis_weight_nee	(	KernelGlobals	kg,
		const float	nee_pdf,
		const float	forward_pdf )

Definition at line 298 of file cycles/kernel/light/sample.h.

References ccl_device_inline, DIRECT_LIGHT_SAMPLING_FORWARD, DIRECT_LIGHT_SAMPLING_NEE, kernel_data, and power_heuristic().

Referenced by integrate_surface_direct_light().

light_sample_shader_eval()

CCL_NAMESPACE_BEGIN ccl_device_noinline_cpu Spectrum light_sample_shader_eval	(	KernelGlobals	kg,
		IntegratorState	state,
		ccl_private ShaderData *ccl_restrict	emission_sd,
		ccl_private LightSample *ccl_restrict	ls,
		const float	time )

Definition at line 25 of file cycles/kernel/light/sample.h.

References ccl_global, ccl_private, ccl_restrict, dot(), kernel_data_fetch, LIGHT_BACKGROUND, LIGHT_TRIANGLE, make_float3(), PATH_RAY_EMISSION, PRIM_NONE, PROFILING_EVENT, PROFILING_INIT_FOR_SHADER, PROFILING_SHADE_LIGHT_EVAL, PROFILING_SHADE_LIGHT_SETUP, PROFILING_SHADER, rgb_to_spectrum(), shader_setup_from_background(), shader_setup_from_sample(), state, surface_shader_background(), surface_shader_constant_emission(), surface_shader_emission(), surface_shader_eval(), and zero_spectrum.

Referenced by integrate_distant_lights(), integrate_light(), integrate_surface_direct_light(), and mnee_path_contribution().

light_sample_terminate()

ccl_device_inline bool light_sample_terminate	(	KernelGlobals	kg,
		ccl_private BsdfEval *ccl_restrict	eval,
		const float	rand_terminate )

Definition at line 94 of file cycles/kernel/light/sample.h.

References bsdf_eval_is_zero(), bsdf_eval_mul(), bsdf_eval_sum(), ccl_device_inline, ccl_private, ccl_restrict, fabs(), kernel_data, and reduce_max().

Referenced by integrate_surface_direct_light().

light_sample_to_surface_shadow_ray()

ccl_device_inline void light_sample_to_surface_shadow_ray	(	KernelGlobals	kg,
		const ccl_private ShaderData *ccl_restrict	sd,
		const ccl_private LightSample *ccl_restrict	ls,
		ccl_private Ray *	ray )

Definition at line 258 of file cycles/kernel/light/sample.h.

References ccl_device_inline, ccl_private, ccl_restrict, P, shadow_ray_offset(), and shadow_ray_setup().

Referenced by integrate_surface_direct_light().

light_sample_to_volume_shadow_ray()

ccl_device_inline void light_sample_to_volume_shadow_ray	(	const ccl_private ShaderData *ccl_restrict	sd,
		const ccl_private LightSample *ccl_restrict	ls,
		const float3	P,
		ccl_private Ray *	ray )

Definition at line 270 of file cycles/kernel/light/sample.h.

References ccl_device_inline, ccl_private, ccl_restrict, P, and shadow_ray_setup().

light_sample_update()

ccl_device_forceinline void light_sample_update	(	KernelGlobals	kg,
		ccl_private LightSample *	ls,
		const float3	P,
		const float3	N,
		const uint32_t	path_flag )

Definition at line 390 of file cycles/kernel/light/sample.h.

References area_light_mnee_sample_update(), ccl_device_forceinline, ccl_global, ccl_private, kernel_data_fetch, LIGHT_AREA, LIGHT_POINT, LIGHT_SPOT, N, P, point_light_mnee_sample_update(), and spot_light_mnee_sample_update().

Referenced by mnee_path_contribution().

shadow_ray_offset()

ccl_device_inline float3 shadow_ray_offset	(	KernelGlobals	kg,
		const ccl_private ShaderData *ccl_restrict	sd,
		const float3	L,
		ccl_private bool *	r_skip_self )

Definition at line 177 of file cycles/kernel/light/sample.h.

References ccl_device_inline, ccl_private, ccl_restrict, clamp(), dot(), kernel_data_fetch, L, NL, P, PRIMITIVE_TRIANGLE, SHADER_SMOOTH_NORMAL, and shadow_ray_smooth_surface_offset().

Referenced by light_sample_to_surface_shadow_ray().

shadow_ray_setup()

ccl_device_inline void shadow_ray_setup	(	const ccl_private ShaderData *ccl_restrict	sd,
		const ccl_private LightSample *ccl_restrict	ls,
		const float3	P,
		ccl_private Ray *	ray,
		const bool	skip_self )

Definition at line 217 of file cycles/kernel/light/sample.h.

References ccl_device_inline, ccl_private, ccl_restrict, differential_make_compact(), differential_zero_compact(), FLT_MAX, OBJECT_NONE, P, PRIM_NONE, safe_normalize_len(), SHADER_CAST_SHADOW, and zero_float3().

Referenced by light_sample_to_surface_shadow_ray(), and light_sample_to_volume_shadow_ray().

shadow_ray_smooth_surface_offset()

ccl_device_inline float3 shadow_ray_smooth_surface_offset	(	KernelGlobals	kg,
		const ccl_private ShaderData *ccl_restrict	sd,
		const float3	Ng )

Definition at line 121 of file cycles/kernel/light/sample.h.

References b, ccl_device_inline, ccl_private, ccl_restrict, dot(), kernel_assert, max, min, motion_triangle_vertices_and_normals(), N, object_dir_transform(), P, PRIMITIVE_MOTION_TRIANGLE, PRIMITIVE_TRIANGLE, SD_OBJECT_TRANSFORM_APPLIED, triangle_vertices_and_normals(), V, v, and w().

Referenced by shadow_ray_offset().