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build world matrix from vectors

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hi every body, its been a long time. I am trying to build a world matrix from XYZ direction vectors and a pos vector, (I am not concerned about scaling). so here is what I do: [cpp] D3DXVECTOR3 X, Y, Z, Pos ; //Fill the vectors with Info D3DXMATRIX mat ; D3DXMatrixIdentity(&mat) ; mat._11 = X.x ; mat._12 = Y.x ; mat._13 = Z.x ; mat._21 = X.y ; mat._22 = Y.y ; mat._23 = Z.y ; mat._31 = X.z ; mat._32 = Y.z ; mat._33 = Z.z ; mat._41 = Pos.x ; mat._42 = Pos.y ; mat._43 = Pos.z ; [\cpp] even though this way seems to be logical, it doesn't work, for instance when my 3d object is supposed to point toward the left (z = (-1, 0, 0)), the 3d objects points toward the right, but when my object points toward the bottom (z = (0, 0, -1)), the object renders with correct orientation. do you have any ideas?

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Assuming this is supposed to be an object rather than a view matrix, your basis vectors are transposed from what they should be. Try transposing the upper-left 3x3 submatrix and see if that doesn't fix the problem.

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