#include <fenv.h>
#include "kernel/util/color.h"

Classes
struct	ChiangHairBSDF

Typedefs
typedef CCL_NAMESPACE_BEGIN struct ChiangHairBSDF	ChiangHairBSDF

Functions
ccl_device_inline float	delta_phi (int p, float gamma_o, float gamma_t)

ccl_device_inline float	wrap_angle (float a)

ccl_device_inline float	logistic (float x, float s)

ccl_device_inline float	logistic_cdf (float x, float s)

ccl_device_inline float	bessel_I0 (float x)

ccl_device_inline float	log_bessel_I0 (float x)

ccl_device_inline float	trimmed_logistic (float x, float s)

ccl_device_inline float	sample_trimmed_logistic (float u, float s)

ccl_device_inline float	azimuthal_scattering (float phi, int p, float s, float gamma_o, float gamma_t)

ccl_device_inline float	longitudinal_scattering (float sin_theta_i, float cos_theta_i, float sin_theta_o, float cos_theta_o, float v)

ccl_device_inline void	hair_attenuation (KernelGlobals kg, float f, Spectrum T, ccl_private Spectrum Ap, ccl_private float Ap_energy)

ccl_device_inline void	hair_alpha_angles (float sin_theta_o, float cos_theta_o, float alpha, ccl_private float *angles)

ccl_device Spectrum	bsdf_hair_chiang_eval (KernelGlobals kg, ccl_private const ShaderData sd, ccl_private const ShaderClosure sc, const float3 wo, ccl_private float *pdf)

ccl_device int	bsdf_hair_chiang_sample (KernelGlobals kg, ccl_private const ShaderClosure sc, ccl_private ShaderData sd, float3 rand, ccl_private Spectrum eval, ccl_private float3 wo, ccl_private float pdf, ccl_private float2 sampled_roughness)

ccl_device void	bsdf_hair_chiang_blur (ccl_private ShaderClosure *sc, float roughness)

ccl_device Spectrum	bsdf_hair_chiang_albedo (ccl_private const ShaderData sd, ccl_private const ShaderClosure sc)

Typedef Documentation

◆ ChiangHairBSDF

typedef CCL_NAMESPACE_BEGIN struct ChiangHairBSDF ChiangHairBSDF

Function Documentation

◆ azimuthal_scattering()

ccl_device_inline float azimuthal_scattering	(	float	phi,
		int	p,
		float	s,
		float	gamma_o,
		float	gamma_t )

Definition at line 127 of file bsdf_principled_hair_chiang.h.

References delta_phi(), trimmed_logistic(), and wrap_angle().

Referenced by bsdf_hair_chiang_eval(), and bsdf_hair_chiang_sample().

◆ bessel_I0()

ccl_device_inline float bessel_I0 ( float x )

Definition at line 74 of file bsdf_principled_hair_chiang.h.

References sqr(), and x.

Referenced by log_bessel_I0(), and longitudinal_scattering().

◆ bsdf_hair_chiang_albedo()

ccl_device Spectrum bsdf_hair_chiang_albedo	(	ccl_private const ShaderData *	sd,
		ccl_private const ShaderClosure *	sc )

Definition at line 463 of file bsdf_principled_hair_chiang.h.

References bsdf_principled_hair_albedo_roughness_scale(), ccl_private, cos_from_sin(), dot(), exp(), fresnel_dielectric_cos(), make_spectrum, safe_normalize(), and sqrt().

Referenced by bsdf_albedo().

◆ bsdf_hair_chiang_blur()

ccl_device void bsdf_hair_chiang_blur	(	ccl_private ShaderClosure *	sc,
		float	roughness )

Definition at line 453 of file bsdf_principled_hair_chiang.h.

References ccl_private, fmaxf, and ChiangHairBSDF::v.

Referenced by bsdf_blur().

◆ bsdf_hair_chiang_eval()

ccl_device Spectrum bsdf_hair_chiang_eval	(	KernelGlobals	kg,
		ccl_private const ShaderData *	sd,
		ccl_private const ShaderClosure *	sc,
		const float3	wo,
		ccl_private float *	pdf )

Definition at line 251 of file bsdf_principled_hair_chiang.h.

References atan2f, azimuthal_scattering(), ccl_private, cos_from_sin(), cross(), dot(), exp(), F, fabsf, fresnel_dielectric_cos(), hair_alpha_angles(), hair_attenuation(), isfinite_safe(), kernel_assert, longitudinal_scattering(), make_float3(), safe_asinf(), safe_normalize(), sqr(), sqrtf, X, float3::x, Y, float3::y, float3::z, and zero_spectrum.

Referenced by bsdf_eval().

◆ bsdf_hair_chiang_sample()

ccl_device int bsdf_hair_chiang_sample	(	KernelGlobals	kg,
		ccl_private const ShaderClosure *	sc,
		ccl_private ShaderData *	sd,
		float3	rand,
		ccl_private Spectrum *	eval,
		ccl_private float3 *	wo,
		ccl_private float *	pdf,
		ccl_private float2 *	sampled_roughness )