And 3d Math - Matrices, Vectors,

The Building Blocks of the 3rd Dimension: Vectors and Matrices

A vector can represent a specific point in space (where you are) or a displacement (how far you moved and in what direction). Matrices, Vectors, and 3d Math

This tells you how much two vectors "align." It’s used constantly in gaming to calculate lighting—the closer a surface faces a light source, the brighter it is. The Building Blocks of the 3rd Dimension: Vectors