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Vectors: the eye watches the fly

ForfatterBerteh
Emne:Subtraktion, Vektorer
Vector subtraction to compute the angle between 2 points. This can be used, for instance, in 2D animation to have an object (eye) always point at another (fly) when they both move... tutorial at http://wiki.synfig.org/wiki/Doc:Point_to_one_object

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