bssrdf.h File Reference

#include "kernel/types.h"
#include "kernel/closure/alloc.h"
#include "kernel/closure/bsdf_diffuse.h"

Go to the source code of this file.

Classes
struct	Bssrdf

Macros
#define	BURLEY_TRUNCATE   16.0f
#define	BURLEY_TRUNCATE_CDF   0.9963790093708328f

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

Macro Definition Documentation

BURLEY_TRUNCATE

#define BURLEY_TRUNCATE   16.0f

Definition at line 99 of file bssrdf.h.

Referenced by bssrdf_burley_eval(), and bssrdf_burley_sample().

BURLEY_TRUNCATE_CDF

#define BURLEY_TRUNCATE_CDF   0.9963790093708328f

Definition at line 100 of file bssrdf.h.

Referenced by bssrdf_burley_pdf(), and bssrdf_burley_sample().

Function Documentation

bssrdf_alloc()

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

Definition at line 270 of file bssrdf.h.

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

Referenced by osl_closure_bssrdf_setup(), osl_closure_subsurface_bssrdf_setup(), and svm_node_closure_bsdf().

bssrdf_burley_compatible_mfp()

ccl_device_inline Spectrum bssrdf_burley_compatible_mfp

(

Spectrum

r

)

Definition at line 110 of file bssrdf.h.

References M_1_PI_F.

Referenced by bssrdf_burley_setup().

bssrdf_burley_eval()

ccl_device float bssrdf_burley_eval	(	const float	d,
		const float	r )

Definition at line 129 of file bssrdf.h.

References BURLEY_TRUNCATE, and expf.

Referenced by bssrdf_burley_pdf().

bssrdf_burley_fitting()

ccl_device_inline float bssrdf_burley_fitting

(

const float

A

)

Definition at line 102 of file bssrdf.h.

References A.

Referenced by bssrdf_burley_setup().

bssrdf_burley_pdf()

ccl_device float bssrdf_burley_pdf	(	const float	d,
		const float	r )

Definition at line 150 of file bssrdf.h.

References bssrdf_burley_eval(), and BURLEY_TRUNCATE_CDF.

Referenced by bssrdf_eval().

bssrdf_burley_root_find()

ccl_device_forceinline float bssrdf_burley_root_find

(

const float

xi

)

Definition at line 163 of file bssrdf.h.

References expf, fabsf, and fmaxf.

Referenced by bssrdf_burley_sample().

bssrdf_burley_sample()

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

Definition at line 197 of file bssrdf.h.

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

Referenced by bssrdf_sample().

bssrdf_burley_setup()

ccl_device void bssrdf_burley_setup

(

ccl_private Bssrdf *

bssrdf

)

Definition at line 115 of file bssrdf.h.

References A, bssrdf(), bssrdf_burley_compatible_mfp(), bssrdf_burley_fitting(), FOREACH_SPECTRUM_CHANNEL, GET_SPECTRUM_CHANNEL, and l.

bssrdf_dipole_compute_alpha_prime()

ccl_device float bssrdf_dipole_compute_alpha_prime	(	const float	rd,
		const float	fourthirdA )

Definition at line 36 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	(	const float	alpha_prime,
		const float	fourthirdA )

Definition at line 30 of file bssrdf.h.

References expf, and sqrtf.

Referenced by bssrdf_dipole_compute_alpha_prime().

bssrdf_eval()

ccl_device_forceinline Spectrum bssrdf_eval	(	const Spectrum	radius,
		const float	r )

Definition at line 253 of file bssrdf.h.

References bssrdf_burley_pdf(), FOREACH_SPECTRUM_CHANNEL, GET_SPECTRUM_CHANNEL, and result.

Referenced by bssrdf_pdf().

bssrdf_num_channels()

ccl_device float bssrdf_num_channels

(

const Spectrum

radius

)

Definition at line 211 of file bssrdf.h.

References FOREACH_SPECTRUM_CHANNEL, and GET_SPECTRUM_CHANNEL.

Referenced by bssrdf_pdf(), and bssrdf_sample().

bssrdf_pdf()

ccl_device_forceinline float bssrdf_pdf	(	const Spectrum	radius,
		const float	r )

Definition at line 262 of file bssrdf.h.

References bssrdf_eval(), bssrdf_num_channels(), and reduce_add().

bssrdf_sample()

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

Definition at line 222 of file bssrdf.h.

References bssrdf_burley_sample(), bssrdf_num_channels(), FOREACH_SPECTRUM_CHANNEL, GET_SPECTRUM_CHANNEL, and sum().

bssrdf_setup()

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

Definition at line 288 of file bssrdf.h.

References Bssrdf::anisotropy, average(), bsdf_alloc(), bsdf_diffuse_setup(), bssrdf(), BSSRDF_MIN_RADIUS, bssrdf_setup_radius(), ccl_private, clamp(), CLOSURE_BSSRDF_RANDOM_WALK_SKIN_ID, CLOSURE_NONE_ID, fabsf, flag, FOREACH_SPECTRUM_CHANNEL, GET_SPECTRUM_CHANNEL, PATH_RAY_DIFFUSE_ANCESTOR, SD_BSSRDF, SPECTRUM_CHANNELS, and zero_spectrum.

Referenced by osl_closure_bssrdf_setup(), osl_closure_subsurface_bssrdf_setup(), and svm_node_closure_bsdf().

bssrdf_setup_radius()

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

Definition at line 66 of file bssrdf.h.

References bssrdf(), bssrdf_dipole_compute_alpha_prime(), CLOSURE_BSSRDF_BURLEY_ID, CLOSURE_BSSRDF_RANDOM_WALK_ID, FOREACH_SPECTRUM_CHANNEL, GET_SPECTRUM_CHANNEL, M_1_PI_F, one_spectrum, and sqrt.

Referenced by bssrdf_setup().