spot.h File Reference

#include "kernel/light/common.h"

Go to the source code of this file.

Functions
CCL_NAMESPACE_BEGIN ccl_device float3	spot_light_to_local (const ccl_global KernelLight *klight, const float3 ray)
ccl_device float	spot_light_attenuation (const ccl_global KernelSpotLight *spot, const float3 ray)
ccl_device void	spot_light_uv (const float3 ray, const float half_cot_half_spot_angle, ccl_private float *u, ccl_private float *v)
template<bool in_volume_segment>
ccl_device_inline bool	spot_light_sample (const ccl_global KernelLight *klight, const float2 rand, const float3 P, const float3 N, const int shader_flags, ccl_private LightSample *ls)
ccl_device_forceinline float	spot_light_pdf (const ccl_global KernelSpotLight *spot, const float d_sq, const float r_sq, const float3 N, const float3 D, const uint32_t path_flag)
ccl_device_forceinline void	spot_light_mnee_sample_update (const ccl_global KernelLight *klight, ccl_private LightSample *ls, const float3 P, const float3 N, const uint32_t path_flag)
ccl_device_inline bool	spot_light_intersect (const ccl_global KernelLight *klight, const ccl_private Ray *ccl_restrict ray, ccl_private float *t)
ccl_device_inline bool	spot_light_sample_from_intersection (const ccl_global KernelLight *klight, const float3 ray_P, const float3 ray_D, const float3 N, const uint32_t path_flag, ccl_private LightSample *ccl_restrict ls)
ccl_device_inline bool	spot_light_valid_ray_segment (const ccl_global KernelLight *klight, const float3 P, const float3 D, ccl_private float2 *t_range)
template<bool in_volume_segment>
ccl_device_forceinline bool	spot_light_tree_parameters (const ccl_global KernelLight *klight, const float3 centroid, const float3 P, const ccl_private BoundingCone &bcone, ccl_private float &cos_theta_u, ccl_private float2 &distance, ccl_private float3 &point_to_centroid, ccl_private float &energy)

Function Documentation

spot_light_attenuation()

ccl_device float spot_light_attenuation	(	const ccl_global KernelSpotLight *	spot,
		const float3	ray )

Definition at line 22 of file spot.h.

References smoothstepf().

Referenced by spot_light_mnee_sample_update(), spot_light_sample(), and spot_light_sample_from_intersection().

spot_light_intersect()

ccl_device_inline bool spot_light_intersect	(	const ccl_global KernelLight *	klight,
		const ccl_private Ray *ccl_restrict	ray,
		ccl_private float *	t )

Definition at line 211 of file spot.h.

References dot(), and point_light_intersect().

Referenced by lights_intersect_impl().

spot_light_mnee_sample_update()

ccl_device_forceinline void spot_light_mnee_sample_update	(	const ccl_global KernelLight *	klight,
		ccl_private LightSample *	ls,
		const float3	P,
		const float3	N,
		const uint32_t	path_flag )

Definition at line 166 of file spot.h.

References fabsf, len_squared(), M_PI_F, N, normalize(), normalize_len(), P, spot_light_attenuation(), spot_light_pdf(), spot_light_to_local(), spot_light_uv(), and sqr().

Referenced by light_sample_update().

spot_light_pdf()

ccl_device_forceinline float spot_light_pdf	(	const ccl_global KernelSpotLight *	spot,
		const float	d_sq,
		const float	r_sq,
		const float3	N,
		const float3	D,
		const uint32_t	path_flag )

Definition at line 150 of file spot.h.

References min, N, PATH_RAY_MIS_HAD_TRANSMISSION, pdf_cos_hemisphere(), and sin_sqr_to_one_minus_cos().

Referenced by spot_light_mnee_sample_update(), and spot_light_sample_from_intersection().

spot_light_sample()

template<bool in_volume_segment>

ccl_device_inline bool spot_light_sample	(	const ccl_global KernelLight *	klight,
		const float2	rand,
		const float3	P,
		const float3	N,
		const int	shader_flags,
		ccl_private LightSample *	ls )

Definition at line 41 of file spot.h.

References copysignf, cos_theta(), disk_light_sample(), dot(), FLT_MAX, len_squared(), light_pdf_area_to_solid_angle(), M_PI_F, N, normalize(), normalize_len(), P, ray_sphere_intersect(), safe_sqrtf(), sample_cos_hemisphere(), sample_uniform_cone(), sample_uniform_sphere(), SD_BSDF_HAS_TRANSMISSION, sin_sqr_to_one_minus_cos(), spot_light_attenuation(), spot_light_to_local(), spot_light_uv(), sqr(), and sqrtf.

Referenced by light_sample().

spot_light_sample_from_intersection()

ccl_device_inline bool spot_light_sample_from_intersection	(	const ccl_global KernelLight *	klight,
		const float3	ray_P,
		const float3	ray_D,
		const float3	N,
		const uint32_t	path_flag,
		ccl_private LightSample *ccl_restrict	ls )

Definition at line 223 of file spot.h.

References FLT_MAX, len_squared(), light_pdf_area_to_solid_angle(), M_PI_F, N, normalize(), spot_light_attenuation(), spot_light_pdf(), spot_light_to_local(), spot_light_uv(), and sqr().

Referenced by light_sample_from_intersection().

spot_light_to_local()

CCL_NAMESPACE_BEGIN ccl_device float3 spot_light_to_local	(	const ccl_global KernelLight *	klight,
		const float3	ray )

Definition at line 12 of file spot.h.

References safe_normalize(), transform_direction(), and float3::z.

Referenced by spot_light_mnee_sample_update(), spot_light_sample(), and spot_light_sample_from_intersection().

spot_light_tree_parameters()

template<bool in_volume_segment>

ccl_device_forceinline bool spot_light_tree_parameters	(	const ccl_global KernelLight *	klight,
		const float3	centroid,
		const float3	P,
		const ccl_private BoundingCone &	bcone,
		ccl_private float &	cos_theta_u,
		ccl_private float2 &	distance,
		ccl_private float3 &	point_to_centroid,
		ccl_private float &	energy )

Definition at line 286 of file spot.h.

References cos_from_sin(), cosf, dot(), fast_acosf(), fmaxf, make_float2(), one_float2(), P, safe_normalize_len(), smoothstepf(), sqr(), and sqrtf.

Referenced by light_tree_emitter_importance().

spot_light_uv()

ccl_device void spot_light_uv	(	const float3	ray,
		const float	half_cot_half_spot_angle,
		ccl_private float *	u,
		ccl_private float *	v )

Definition at line 27 of file spot.h.

References v.

Referenced by spot_light_mnee_sample_update(), spot_light_sample(), and spot_light_sample_from_intersection().

spot_light_valid_ray_segment()

ccl_device_inline bool spot_light_valid_ray_segment	(	const ccl_global KernelLight *	klight,
		const float3	P,
		const float3	D,
		ccl_private float2 *	t_range )

Definition at line 268 of file spot.h.

References make_float3(), P, ray_cone_intersect(), sqr(), transform_direction(), and transform_point().