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I need to know the easiest trick to do rotations
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I need to know the easiest trick to do rotations

User Allan Veloso
by
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1 Answer

4 votes
90º (-270º): (x,y) ---> (y, -x)
180º (-180º): (x, y) ---> (-x, -y)
270º (-90º): (x,y) ---> (-y, x)
User Enigmativity
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