Module functions 

Auto-generated module

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Functions

add3

Add two 3-D vectors.

ambient_occlusion

Compute ambient occlusion by casting rays in the hemisphere.

atrous_denoise

A-trous wavelet denoising pass for progressive path traced images.

box_filter

Box filter denoising pass (simple spatial blur).

clamp_color

Clamp each component of a color to [0,1].

cosine_sample_hemisphere

Simple hemisphere sampler using cosine-weighted distribution.

cross3

Cross product of two 3-D vectors.

distribution_ggx

GGX normal distribution function.

dot3

Dot product of two 3-D vectors.

fresnel_schlick

Schlick Fresnel approximation.

gamma_correct

Apply sRGB gamma to a color.

geometry_smith

Smith’s geometry function (GGX).

length3

Length of a 3-D vector.

linear_to_srgb

Linear to sRGB gamma correction.

mul_color

Component-wise multiply two RGB colors.

normalize3

Normalize a 3-D vector (returns zero vector if near zero).

path_trace_step

Trace a single path and accumulate radiance.

pbr_shading

Cook-Torrance PBR BRDF shading.

phong_shading

Phong shading model.

reflect3

Reflect direction d about normal n (both normalized).

refract

Compute refraction direction using Snell’s law.

render_direct

Ray trace a simple scene (direct illumination only) on the CPU.

scale3

Scale a 3-D vector by a scalar.

schlick_reflectance

Schlick approximation for reflectance at a dielectric interface.

soft_shadow_factor

Compute soft shadow factor (0=fully shadowed, 1=fully lit) by sampling an area light with num_samples jittered samples.

sub3

Subtract two 3-D vectors.

temporal_accumulate

Temporal accumulation (exponential moving average) denoising.

tonemap_aces

ACES filmic tone mapping.

tonemap_filmic

Filmic tone mapping (Hejl and Burgess-Dawson approximation).

tonemap_reinhard

Reinhard tone mapping operator.

uniform_sample_hemisphere

Uniform hemisphere sampler.