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Krak

How Do You Multliply 4*4 Matrices By Hand?

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Say I had: |1 2 0 0| |0 1 4 0| |0 0 1 3| |0 0 0 1| and |1 6 0 0| |0 1 2 0| |0 0 1 4| |0 0 0 1| How would I go about multliplying these two without a calculator? This stuff''s apparently really important to know for 3D stuff in OpenGL.

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It depends on the order you want to multiply. ie AB != BA, in general. The process, while easy, is hard to describe without diagrams. In the articles section of this site, there should be some good resources, under "Math".



Wizza Wuzza?

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