opengl - Given a 4x4 homogeneous matrix, how can i get 3D world coords? -

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so have object getting rotated translated , rotated again. storing matrix of these translations object member. when come object picking need know 3d world coords of object.

currently have been able position of object so

coords[0] = finalmatrix[12];

coords[1] = finalmatrix[13];

coords[2] = finalmatrix[14];

this giving me correct positions of objects want take rotations account well.

any great...

the matrix 4x4 matrix, you've got single dimensional matrix appears elements arranged follows:

[0]  [4]  [8]   [12] [1]  [5]  [9]   [13] [2]  [6]  [10]  [14] [3]  [7]  [11]  [15]

the rotation part top left 3x3 matrix see here, in case elements [0]-[2], [4]-[6] , [8]-[10]


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