kernel_volume.h File Reference

Go to the source code of this file.

Classes
struct	VolumeShaderCoefficients

Macros
#define	VOLUME_THROUGHPUT_EPSILON   1e-6f

Typedefs
typedef enum VolumeIntegrateResult	VolumeIntegrateResult
typedef struct VolumeShaderCoefficients	VolumeShaderCoefficients

Enumerations
enum	VolumeIntegrateResult { VOLUME_PATH_SCATTERED = 0 , VOLUME_PATH_ATTENUATED = 1 , VOLUME_PATH_MISSED = 2 }

Functions
ccl_device float3	volume_color_transmittance (float3 sigma, float t)
ccl_device float	kernel_volume_channel_get (float3 value, int channel)
ccl_device float	kernel_volume_equiangular_sample (Ray *ray, float3 light_P, float xi, float *pdf)
ccl_device float	kernel_volume_equiangular_pdf (Ray *ray, float3 light_P, float sample_t)
ccl_device float	kernel_volume_distance_sample (float max_t, float3 sigma_t, int channel, float xi, float3 *transmittance, float3 *pdf)
ccl_device float3	kernel_volume_distance_pdf (float max_t, float3 sigma_t, float sample_t)
ccl_device float3	kernel_volume_emission_integrate (VolumeShaderCoefficients *coeff, int closure_flag, float3 transmittance, float t)
ccl_device int	kernel_volume_sample_channel (float3 albedo, float3 throughput, float rand, float3 *pdf)

Macro Definition Documentation

VOLUME_THROUGHPUT_EPSILON

#define VOLUME_THROUGHPUT_EPSILON   1e-6f

Definition at line 23 of file kernel_volume.h.

Typedef Documentation

VolumeIntegrateResult

typedef enum VolumeIntegrateResult VolumeIntegrateResult

VolumeShaderCoefficients

typedef struct VolumeShaderCoefficients VolumeShaderCoefficients

Enumeration Type Documentation

VolumeIntegrateResult

enum VolumeIntegrateResult

Enumerator
VOLUME_PATH_SCATTERED
VOLUME_PATH_ATTENUATED
VOLUME_PATH_MISSED

Definition at line 27 of file kernel_volume.h.

Function Documentation

kernel_volume_channel_get()

ccl_device float kernel_volume_channel_get	(	float3	value,
		int	channel
	)

Definition at line 107 of file kernel_volume.h.

References float3::x, float3::y, and float3::z.

Referenced by kernel_volume_distance_sample(), and subsurface_random_walk().

kernel_volume_distance_pdf()

ccl_device float3 kernel_volume_distance_pdf	(	float	max_t,
		float3	sigma_t,
		float	sample_t
	)

Definition at line 389 of file kernel_volume.h.

References one_float3(), safe_divide_color(), and volume_color_transmittance().

kernel_volume_distance_sample()

ccl_device float kernel_volume_distance_sample	(	float	max_t,
		float3	sigma_t,
		int	channel,
		float	xi,
		float3 *	transmittance,
		float3 *	pdf
	)

Definition at line 368 of file kernel_volume.h.

References kernel_volume_channel_get(), logf, min, one_float3(), safe_divide_color(), and volume_color_transmittance().

kernel_volume_emission_integrate()

ccl_device float3 kernel_volume_emission_integrate	(	VolumeShaderCoefficients *	coeff,
		int	closure_flag,
		float3	transmittance,
		float	t
	)

Definition at line 399 of file kernel_volume.h.

References VolumeShaderCoefficients::emission, SD_EXTINCTION, VolumeShaderCoefficients::sigma_t, t, float3::x, float3::y, and float3::z.

kernel_volume_equiangular_pdf()

ccl_device float kernel_volume_equiangular_pdf	(	Ray *	ray,
		float3	light_P,
		float	sample_t
	)

Definition at line 344 of file kernel_volume.h.

References atan2f, Ray::D, D(), dot(), len_squared(), Ray::P, safe_sqrtf(), Ray::t, t, and UNLIKELY.

kernel_volume_equiangular_sample()

ccl_device float kernel_volume_equiangular_sample	(	Ray *	ray,
		float3	light_P,
		float	xi,
		float *	pdf
	)

Definition at line 322 of file kernel_volume.h.

References atan2f, Ray::D, D(), dot(), len_squared(), min, Ray::P, safe_sqrtf(), Ray::t, t, tanf, and UNLIKELY.

kernel_volume_sample_channel()

ccl_device int kernel_volume_sample_channel	(	float3	albedo,
		float3	throughput,
		float	rand,
		float3 *	pdf
	)

Definition at line 425 of file kernel_volume.h.

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

Referenced by subsurface_random_walk().

volume_color_transmittance()

ccl_device float3 volume_color_transmittance	(	float3	sigma,
		float	t
	)

Definition at line 102 of file kernel_volume.h.

References exp3(), and t.

Referenced by kernel_volume_distance_pdf(), kernel_volume_distance_sample(), and subsurface_random_walk_pdf().