OpenGL matrices

• In OpenGL, all vectors (at least internally) have 4 components and all transformations are represented by 4 by 4 matrices
• the transformation matrices are stored as sequences of 16 numbers in the following order:

Note: the indices in the matrix above are not C array indices;

they start with 1. Never use two-dimensional C arrays to represent

OpenGL matrices, use one-dimensional arrays of length 16.

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