Normal
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- A normal is a float value between 0 and 1 that often represents a percentage.
- A normalised vector is one with a length of 1.
- A
vertex normal defines the "front" of that vertex, determining among other things how much lighting it receives from a given angle. - A surface normal is like a vertex normal, but for a triangle instead of a vertex. Determined via vertex winding order, and used to determine which side of the face should be drawn.
- Normal mapping is a technique in which vertex normals are modified per-texel by a special texture, creating the impression of extra depth.