mapping.h File Reference

#include "util/math.h"
#include "util/projection.h"

Go to the source code of this file.

Functions
CCL_NAMESPACE_BEGIN ccl_device float2	sample_uniform_disk (const float2 rand)
ccl_device void	make_orthonormals_tangent (const float3 N, const float3 T, ccl_private float3 *a, ccl_private float3 *b)
ccl_device void	make_orthonormals_safe_tangent (const float3 N, const float3 T, ccl_private float3 *a, ccl_private float3 *b)
ccl_device_inline void	sample_cos_hemisphere (const float3 N, const float2 rand_in, ccl_private float3 *wo, ccl_private float *pdf)
ccl_device_inline float	pdf_cos_hemisphere (const float3 N, const float3 D)
ccl_device_inline void	sample_uniform_hemisphere (const float3 N, const float2 rand, ccl_private float3 *wo, ccl_private float *pdf)
ccl_device_inline float	pdf_uniform_cone (const float3 N, const float3 D, const float angle)
ccl_device_inline float3	sample_uniform_cone (const float3 N, const float one_minus_cos_angle, const float2 rand, ccl_private float *cos_theta, ccl_private float *pdf)
ccl_device float3	sample_uniform_sphere (const float2 rand)
ccl_device float2	regular_polygon_sample (const float corners, float rotation, const float2 rand)
ccl_device_inline int	sample_geometric_distribution (const float rand, const float r, ccl_private float &pmf, const int cut_off=INT_MAX)
ccl_device_inline float	sample_exponential_distribution (const float rand, const float lambda)
ccl_device_inline float	sample_exponential_distribution (const float rand, const float lambda, const Interval< float > t)
ccl_device_inline Spectrum	pdf_exponential_distribution (const float x, const Spectrum lambda, const Interval< float > t)

Function Documentation

make_orthonormals_safe_tangent()

ccl_device void make_orthonormals_safe_tangent	(	const float3	N,
		const float3	T,
		ccl_private float3 *	a,
		ccl_private float3 *	b )

Definition at line 51 of file sample/mapping.h.

References b, ccl_device, ccl_private, cross, len_squared(), make_orthonormals(), N, safe_normalize(), and T.

Referenced by bsdf_sheen_setup().

make_orthonormals_tangent()

ccl_device void make_orthonormals_tangent	(	const float3	N,
		const float3	T,
		ccl_private float3 *	a,
		ccl_private float3 *	b )

Definition at line 42 of file sample/mapping.h.

References b, ccl_device, ccl_private, cross, N, normalize, and T.

Referenced by bsdf_ashikhmin_shirley_eval(), bsdf_ashikhmin_shirley_sample(), bsdf_microfacet_eval(), bsdf_microfacet_sample(), and compute_v().

pdf_cos_hemisphere()

ccl_device_inline float pdf_cos_hemisphere	(	const float3	N,
		const float3	D )

Definition at line 82 of file sample/mapping.h.

References ccl_device_inline, cos_theta(), D, dot(), M_1_PI_F, and N.

Referenced by sphere_light_pdf(), and spot_light_pdf().

pdf_exponential_distribution()

ccl_device_inline Spectrum pdf_exponential_distribution	(	const float	x,
		const Spectrum	lambda,
		const Interval< float >	t )

Definition at line 243 of file sample/mapping.h.

References ccl_device_inline, clamp(), exp, Interval< T >::max, Interval< T >::min, safe_divide(), and x.

pdf_uniform_cone()

ccl_device_inline float pdf_uniform_cone	(	const float3	N,
		const float3	D,
		const float	angle )

Definition at line 107 of file sample/mapping.h.

References angle(), ccl_device_inline, D, M_1_2PI_F, N, one_minus_cos(), precise_angle(), and z().

Referenced by background_sun_pdf().

regular_polygon_sample()

ccl_device float2 regular_polygon_sample	(	const float	corners,
		float	rotation,
		const float2	rand )

Definition at line 184 of file sample/mapping.h.

References angle(), ccl_device, cosf, floorf, M_PI_F, make_float2, sinf, sqrtf, v, float2::x, and float2::y.

Referenced by camera_sample_aperture().

sample_cos_hemisphere()

ccl_device_inline void sample_cos_hemisphere	(	const float3	N,
		const float2	rand_in,
		ccl_private float3 *	wo,
		ccl_private float *	pdf )

Definition at line 67 of file sample/mapping.h.

References B, ccl_device_inline, ccl_private, len_squared(), M_1_PI_F, make_orthonormals(), N, safe_sqrtf(), sample_uniform_disk(), T, float2::x, and float2::y.

Referenced by bsdf_diffuse_sample(), bsdf_oren_nayar_sample(), bsdf_translucent_sample(), point_light_sample(), and spot_light_sample().

sample_exponential_distribution() [1/2]

ccl_device_inline float sample_exponential_distribution	(	const float	rand,
		const float	lambda )

Definition at line 226 of file sample/mapping.h.

References ccl_device_inline, and logf.

sample_exponential_distribution() [2/2]

ccl_device_inline float sample_exponential_distribution	(	const float	rand,
		const float	lambda,
		const Interval< float >	t )

Definition at line 235 of file sample/mapping.h.

References ccl_device_inline, clamp(), expf, logf, Interval< T >::max, and Interval< T >::min.

sample_geometric_distribution()

ccl_device_inline int sample_geometric_distribution	(	const float	rand,
		const float	r,
		ccl_private float &	pmf,
		const int	cut_off = INT_MAX )

Definition at line 214 of file sample/mapping.h.

References ccl_device_inline, ccl_private, floorf, logf, min, and powf.

sample_uniform_cone()

ccl_device_inline float3 sample_uniform_cone	(	const float3	N,
		const float	one_minus_cos_angle,
		const float2	rand,
		ccl_private float *	cos_theta,
		ccl_private float *	pdf )

Definition at line 121 of file sample/mapping.h.

References B, ccl_device_inline, ccl_private, cos_theta(), len_squared(), M_1_2PI_F, make_orthonormals(), N, safe_sqrtf(), sample_uniform_disk(), T, and xy.

Referenced by background_sun_sample(), bsdf_diffuse_toon_sample(), bsdf_glossy_toon_sample(), distant_light_sample(), point_light_sample(), and spot_light_sample().

sample_uniform_disk()

CCL_NAMESPACE_BEGIN ccl_device float2 sample_uniform_disk

(

const float2

rand

)

Definition at line 17 of file sample/mapping.h.

References b, ccl_device, M_PI_2_F, M_PI_4_F, polar_to_cartesian(), float2::x, float2::y, and zero_float2().

Referenced by bsdf_sheen_sample(), camera_sample_aperture(), ellipse_sample(), microfacet_ggx_sample_vndf(), sample_cos_hemisphere(), sample_uniform_cone(), and sample_uniform_hemisphere().

sample_uniform_hemisphere()

ccl_device_inline void sample_uniform_hemisphere	(	const float3	N,
		const float2	rand,
		ccl_private float3 *	wo,
		ccl_private float *	pdf )

Definition at line 89 of file sample/mapping.h.

References B, ccl_device_inline, ccl_private, len_squared(), M_1_2PI_F, make_orthonormals(), N, safe_sqrtf(), sample_uniform_disk(), T, xy, and z().

Referenced by bsdf_ashikhmin_velvet_sample().

sample_uniform_sphere()

ccl_device float3 sample_uniform_sphere

(

const float2

rand

)

Definition at line 174 of file sample/mapping.h.

References ccl_device, M_2PI_F, make_float3(), polar_to_cartesian(), sin_from_cos(), float2::x, float2::y, and z().

Referenced by background_light_sample(), point_light_sample(), and spot_light_sample().