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Angle between two objects (3d)

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O-----Z | | |--|a | X How, in 3D, would you calculate angle 'a' between X and Z?

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Take the scalar product of the two vectors, divide by the lengths of both vectors, take the arccosine.

Actually, this is pretty much a definition of angle.

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Quote:
Original post by alvaro
Take the scalar product of the two vectors, divide by the lengths of both vectors, take the arccosine.

Actually, this is pretty much a definition of angle.


ie the Dot Product

angle = acos((U.V)/(Magnitude(U)*Magnitude(V)))

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