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Pipo DeClown

why do you need to multiply

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why do you need to multiply matrice(s?) when you can use the same matrix to do translation + rotation and then Transform it to WorldSpacE?

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If you don''t need to multiply matrices, then you don''t. If you do, then you do. It''s like asking "why do you need a car when you can just take public transport?" If public transport offers you everything you need, then don''t buy a car.

As for reasons to use matrix multiplication, here''s one I''m implementing right now - skeletal animation. You have a heirarchy of bones, and the transformations that apply to a particular bone must also be applied to all child bones. So, as your traverse down the "bone tree", you multiply the current matrix with the child''s matrix to get the total transformation.

If I had my way, I''d have all of you shot!

codeka.com - Just click it.

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