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Vector question

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Hi, I would appreciate some help with my 3D programming. I have a D3DXVECTOR3, which is the direction in which my mesh is supposed to face. How do I create a Matrix that I can use as the world matrix for my mesh if I want it to face in the same direction as the vector? Since I know the position of the mesh I can build the translation matrix without problems, but the matrix to do my rotation is still a mystery. Please help. David Hallgren

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