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With due respect, who is "we" and what are you talking about? The book does not as much as mention a homogeneous coordinate and uses 2-arrays for 2D vectors.
by chengiz 8y ago
With due respect, who is "we" and what are you talking about? The book does not as much as mention a homogeneous coordinate and uses 2-arrays for 2D vectors.
- VikingCoder 8y agoI'm off on a tangent unrelated to the book. "we" is computer programmers who deal with vectors and points. Mostly graphics, physics, games, etc.
- joppy 8y agoTechnically the projective coordinate (3,2,1) should be exactly the same as (6,4,2), and every nonzero multiple thereof. So it’s not really correct to say that (x, y, 0) represents a vector, or that adding these projective coordinates is vector addition. Vector addition is represented by an identity matrix with the x, y coordinates in the rightmost column.