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Lecture 4: Transforms (54)

(Seed for discussion)

Points end with a 1, and directions end with a 0. This suggests that the first 3 columns of a 4x4 affine matrix are somehow "directions" and the last column is a "point". Why might this be?


The first three columns affect the rotations/scaling, which could be referred to as directional changes, but the last column will translate and move an image, moving its focal point. When the last column has a zero, the translation doesn't occur for any vectors (vectors = "directions"...?)

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