@orillusion/core

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Class: IridescenceUtil

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

CPU mirror of Iridescence_frag (thin-film interference, Belcour & Barla 2017). Keep in sync with the WGSL. Useful for previews, LUT baking and GPU-vs-CPU validation.

Constructors

Constructor

new IridescenceUtil(): IridescenceUtil

Returns

IridescenceUtil

Methods

evalIridescence()

static evalIridescence(outsideIOR, filmIor, cosTheta, thicknessNm, baseF0): [number, number, number]

Defined in: src/util/IridescenceUtil.ts:36

Fresnel reflectance (linear RGB) of a base surface with Schlick F0 baseF0 under a thin film of index filmIor and thickness thicknessNm, seen at cosTheta (N·V).

Parameters

outsideIOR

number

filmIor

number

cosTheta

number

thicknessNm

number

baseF0

[number, number, number]

Returns

[number, number, number]

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filmF0()

static filmF0(baseF0, NoV, factor, filmIor, thicknessNm): [number, number, number]

Defined in: src/util/IridescenceUtil.ts:78

The F0 the PBR shader ends up using: film Fresnel converted back to a Schlick F0 and blended with the base F0 by factor.

Parameters

baseF0

[number, number, number]

NoV

number

factor

number

filmIor

number

thicknessNm

number

Returns

[number, number, number]