`faceForward`

Function

Returns n if dot(nref, i) is negative, else -n: the normal that faces the incident vector.

The signature and the sentence under each name are the compiler's own text at commit 26de7be8.

Syntax

declare function faceForward<V extends vec2 | vec3 | vec4>(a0: V, a1: V, a2: V): V
declare function faceForward<T extends Numeric>(a0: T, a1: T, a2: T): T

A signature may name a type the ambient file declares for its own use. These are those declarations.

Numeric: type Numeric = number | vec2 | vec3 | vec4 | vec2i | vec3i | vec4i | vec2u | vec3u | vec4u

Parameters

A parameter named by position (a0, a1) carries a name the ambient file generates. A call passes its arguments in order and names none of them.

a0 VT
a1 VT
a2 VT

Return value

VT

Description

faceforward on GLSL.

Evaluated in f64 by the CPU oracle.

Targets

WGSL: faceForward(a, b, c)
GLSL ES 3.00: faceforward(a, b, c)

Examples

bit-bump.shade.ts