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VisualShaderNodeFaceForward

Inherits: VisualShaderNodeVectorBase < VisualShaderNode < Resource < RefCounted < Object

返回与可视化着色器图中的参考向量指向相同方向的向量。

Description

在着色器语言中翻译为 faceforward(N, I, Nref)。该函数有三个向量参数。N，定向向量，I，入射向量，以及Nref，参考矢量。如果 I 和 Nref 的点积小于零，返回值为 N。否则，将返回 -N。