《Unity着色器圣经》1.0.3 | 法线

目录索引

【人工翻译】《Unity着色器圣经》全书目录

38天前

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译文

假设我们面前有一张白纸，现在请一位朋友在白纸的正面画画。如果白纸的两面都完全一样，我们要如何区分白纸的“正面”和“反面”呢？这就是法线（normal）存在的原因。法线对应垂直于多边形表面上的向量，用于确定面或顶点的方向或方位。

在 Maya 中，我们可以通过选择属性 “顶点法线（vertex normal）“来可视化模型的法线。通过这个功能，我们可以看到顶点在空间中的指向，并确定模型不同面之间的硬度级别。

原文对照

Let’s imagine that we have a blank sheet of paper, and we ask a friend to draw on the front face of the sheet. How could we determine which is the front face of a blank sheet if both sides are equal? This is why normals exist. A normal corresponds to a perpendicular vector on the surface of a polygon which is used to determine the direction or orientation of a face or vertex.

In Maya, we can visualize the normals of an object by selecting the property vertex normals. It allows us to see where a vertex points in space and determines the hardness level between the different faces of an object.