bssrdf.h File Reference

Go to the source code of this file.

Classes
struct	Bssrdf

Macros
#define	BURLEY_TRUNCATE   16.0f
#define	BURLEY_TRUNCATE_CDF   0.9963790093708328f

Typedefs
typedef CCL_NAMESPACE_BEGIN struct Bssrdf	Bssrdf

Functions
ccl_device float	bssrdf_dipole_compute_Rd (float alpha_prime, float fourthirdA)
ccl_device float	bssrdf_dipole_compute_alpha_prime (float rd, float fourthirdA)
ccl_device void	bssrdf_setup_radius (ccl_private Bssrdf *bssrdf, const ClosureType type, const float eta)
ccl_device_inline float	bssrdf_burley_fitting (float A)
ccl_device_inline float3	bssrdf_burley_compatible_mfp (float3 r)
ccl_device void	bssrdf_burley_setup (ccl_private Bssrdf *bssrdf)
ccl_device float	bssrdf_burley_eval (const float d, float r)
ccl_device float	bssrdf_burley_pdf (const float d, float r)
ccl_device_forceinline float	bssrdf_burley_root_find (float xi)
ccl_device void	bssrdf_burley_sample (const float d, float xi, ccl_private float *r, ccl_private float *h)
ccl_device float	bssrdf_num_channels (const float3 radius)
ccl_device void	bssrdf_sample (const float3 radius, float xi, ccl_private float *r, ccl_private float *h)
ccl_device_forceinline float3	bssrdf_eval (const float3 radius, float r)
ccl_device_forceinline float	bssrdf_pdf (const float3 radius, float r)
ccl_device_inline ccl_private Bssrdf *	bssrdf_alloc (ccl_private ShaderData *sd, float3 weight)
ccl_device int	bssrdf_setup (ccl_private ShaderData *sd, ccl_private Bssrdf *bssrdf, ClosureType type, const float ior)

Macro Definition Documentation

BURLEY_TRUNCATE

#define BURLEY_TRUNCATE   16.0f

Definition at line 90 of file bssrdf.h.

BURLEY_TRUNCATE_CDF

#define BURLEY_TRUNCATE_CDF   0.9963790093708328f

Definition at line 91 of file bssrdf.h.

Typedef Documentation

Bssrdf

typedef CCL_NAMESPACE_BEGIN struct Bssrdf Bssrdf

Function Documentation

bssrdf_alloc()

ccl_device_inline ccl_private Bssrdf* bssrdf_alloc	(	ccl_private ShaderData *	sd,
		float3	weight
	)

Definition at line 259 of file bssrdf.h.

References average(), bssrdf(), ccl_private, closure_alloc(), CLOSURE_NONE_ID, CLOSURE_WEIGHT_CUTOFF, fabsf, and NULL.

Referenced by CBSSRDFClosure::alloc(), and svm_node_closure_bsdf().

bssrdf_burley_compatible_mfp()

ccl_device_inline float3 bssrdf_burley_compatible_mfp

(

float3

r

)

Definition at line 101 of file bssrdf.h.

References M_1_PI_F, and r.

Referenced by bssrdf_burley_setup().

bssrdf_burley_eval()

ccl_device float bssrdf_burley_eval	(	const float	d,
		float	r
	)

Definition at line 118 of file bssrdf.h.

References BURLEY_TRUNCATE, expf, and r.

Referenced by bssrdf_burley_pdf().

bssrdf_burley_fitting()

ccl_device_inline float bssrdf_burley_fitting

(

float

A

)

Definition at line 93 of file bssrdf.h.

References A.

Referenced by bssrdf_burley_setup().

bssrdf_burley_pdf()

ccl_device float bssrdf_burley_pdf	(	const float	d,
		float	r
	)

Definition at line 138 of file bssrdf.h.

References bssrdf_burley_eval(), BURLEY_TRUNCATE_CDF, and r.

Referenced by bssrdf_eval().

bssrdf_burley_root_find()

ccl_device_forceinline float bssrdf_burley_root_find

(

float

xi

)

Definition at line 151 of file bssrdf.h.

References expf, fabsf, and r.

Referenced by bssrdf_burley_sample().

bssrdf_burley_sample()

ccl_device void bssrdf_burley_sample	(	const float	d,
		float	xi,
		ccl_private float *	r,
		ccl_private float *	h
	)

Definition at line 187 of file bssrdf.h.

References bssrdf_burley_root_find(), BURLEY_TRUNCATE, BURLEY_TRUNCATE_CDF, r, and safe_sqrtf().

Referenced by bssrdf_sample().

bssrdf_burley_setup()

ccl_device void bssrdf_burley_setup

(

ccl_private Bssrdf *

bssrdf

)

Definition at line 106 of file bssrdf.h.

References A, bssrdf(), bssrdf_burley_compatible_mfp(), bssrdf_burley_fitting(), l, and make_float3.

bssrdf_dipole_compute_alpha_prime()

ccl_device float bssrdf_dipole_compute_alpha_prime	(	float	rd,
		float	fourthirdA
	)

Definition at line 27 of file bssrdf.h.

References bssrdf_dipole_compute_Rd().

Referenced by bssrdf_setup_radius().

bssrdf_dipole_compute_Rd()

ccl_device float bssrdf_dipole_compute_Rd	(	float	alpha_prime,
		float	fourthirdA
	)

Definition at line 21 of file bssrdf.h.

References expf, and sqrtf.

Referenced by bssrdf_dipole_compute_alpha_prime().

bssrdf_eval()

ccl_device_forceinline float3 bssrdf_eval	(	const float3	radius,
		float	r
	)

Definition at line 244 of file bssrdf.h.

References bssrdf_burley_pdf(), make_float3, r, float3::x, float3::y, and float3::z.

Referenced by bssrdf_pdf(), and subsurface_disk_eval().

bssrdf_num_channels()

ccl_device float bssrdf_num_channels

(

const float3

radius

)

Definition at line 201 of file bssrdf.h.

References channels(), float3::x, float3::y, and float3::z.

Referenced by bssrdf_pdf(), and bssrdf_sample().

bssrdf_pdf()

ccl_device_forceinline float bssrdf_pdf	(	const float3	radius,
		float	r
	)

Definition at line 251 of file bssrdf.h.

References bssrdf_eval(), bssrdf_num_channels(), r, float3::x, float3::y, and float3::z.

Referenced by subsurface_disk_eval().

bssrdf_sample()

ccl_device void bssrdf_sample	(	const float3	radius,
		float	xi,
		ccl_private float *	r,
		ccl_private float *	h
	)

Definition at line 216 of file bssrdf.h.

References bssrdf_burley_sample(), bssrdf_num_channels(), r, float3::x, float3::y, and float3::z.

Referenced by subsurface_disk().

bssrdf_setup()

ccl_device int bssrdf_setup	(	ccl_private ShaderData *	sd,
		ccl_private Bssrdf *	bssrdf,
		ClosureType	type,
		const float	ior
	)

Definition at line 273 of file bssrdf.h.

References average(), bsdf_alloc(), bsdf_diffuse_setup(), bsdf_principled_diffuse_retro_reflection_sample_weight(), bsdf_principled_diffuse_setup(), bssrdf(), BSSRDF_MIN_RADIUS, bssrdf_setup_radius(), ccl_private, fabsf, usdtokens::ior(), make_float3, PRINCIPLED_DIFFUSE_LAMBERT, PRINCIPLED_DIFFUSE_RETRO_REFLECTION, SD_BSSRDF, type, float3::x, float3::y, and float3::z.

Referenced by CBSSRDFClosure::alloc(), and svm_node_closure_bsdf().

bssrdf_setup_radius()

ccl_device void bssrdf_setup_radius	(	ccl_private Bssrdf *	bssrdf,
		const ClosureType	type,
		const float	eta
	)

Definition at line 56 of file bssrdf.h.

References bssrdf(), bssrdf_dipole_compute_alpha_prime(), CLOSURE_BSSRDF_BURLEY_ID, CLOSURE_BSSRDF_RANDOM_WALK_FIXED_RADIUS_ID, M_1_PI_F, make_float3, one_float3(), sqrt(), and type.

Referenced by bssrdf_setup().