PbrShader class final

pbr.frag: Cook-Torrance with GGX, height-correlated Smith and Schlick, following the BRDF the glTF specification describes.

Image-based lighting when the scene supplies an environment (frame_params.w carries the cube's level count, zero for none), the flat hemispheric ambient otherwise. Operation for operation with pbr.frag, because golden images compare the two.

Inheritance

• Object
• CpuFragmentShader
• PbrShader

Constructors

PbrShader()

pbr.frag, the engine's own stage: no hooks, not layered. builtinCpuShaders files it under Pbr, PbrOpaque and their twins.

const

PbrShader.hooked(PbrHooks hooks)

pbr.frag with a material's injection points — version 4 of the material language, lighting standard; — filled by hooks.

const

PbrShader.layered()

pbr_layered.frag: the same stage with F3D_LAYERED — M1.

const

Properties

hashCode → int

The hash code for this object.

no setter, inherited

hooks → PbrHooks?

The injection points a material lit by this model fills, or null for the engine's own stage.

final

layered → bool

Whether this is the layered stage, which reads LayerInfo and the coat map. Plain metal-rough takes none of the branches it guards, so the thirty golden images of that stage see what they always saw.

final

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

run(Float32List v, ShaderBindings b, FragmentContext c) → Vector4?

Returns linear RGBA for attachment zero. Null discards the fragment.

override

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited

Static Methods

eonAlbedo(Vector3 rho, double r, double mu) → Vector3

EonAlbedo: eonLobe over the hemisphere of light, at mu to the eye.

eonLobe(Vector3 rho, double r, double muI, double muO, double lDotV) → Vector3

EonLobe: EON for the diffuse colour rho, divided by π.

sheenLobe(double roughness, Surface s, LightSample light) → double

The sheen's lobe in ShadeLight, before its colour: Charlie's distribution at roughness times Neubelt's visibility.

Constants

minGgxRoughness → const double

kMinGgxRoughness: the least perceptual roughness the GGX lobe is evaluated at, which keeps its peak clear of _dGgx's guard. A fraction, nought to one, as roughness is.