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faceforward.md

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faceforward

faceforward orients a vector to point away from a surface as defined by its normal.

If (dot(Nref, I) < 0) faceforward returns N, otherwise it returns -N.

faceforward(float,float,float)

Parameters

N Type: float

I Type: float

Nref Type: float

Return Value

Type: float

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faceforward(vec2,vec2,vec2)

Parameters

N Type: vec2

I Type: vec2

Nref Type: vec2

Return Value

Type: vec2

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faceforward(vec3,vec3,vec3)

Parameters

N Type: vec3

I Type: vec3

Nref Type: vec3

Return Value

Type: vec3

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faceforward(vec4,vec4,vec4)

Parameters

N Type: vec4

I Type: vec4

Nref Type: vec4

Return Value

Type: vec4

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