@orillusion/core

---

Class: AnisotropyUtil

Defined in: src/util/AnisotropyUtil.ts:7

CPU mirror of Anisotropy_frag (the anisotropic / isotropic GGX ratio). All vectors are unit length, in the same space; T, B, N form an orthonormal frame with T along the grain direction.

Constructors

Constructor

new AnisotropyUtil(): AnisotropyUtil

Returns

AnisotropyUtil

Methods

alphaT()

static alphaT(roughness, strength): number

Defined in: src/util/AnisotropyUtil.ts:12

Tangent-direction alpha for a roughness and anisotropy strength (glTF: mix(α, 1, strength²)).

Parameters

roughness

number

strength

number

Returns

number

---

specularRatio()

static specularRatio(N, V, L, T, B, roughness, strength): number

Defined in: src/util/AnisotropyUtil.ts:19

(anisotropic D·V) / (isotropic D·V). Exactly 1 for strength 0.

Parameters

N

number[]

V

number[]

L

number[]

T

number[]

B

number[]

roughness

number

strength

number

Returns

number