Hi everyone,
I'm trying to project a point from a deep image back to 3d space. I'm currently
taking the camera projection matrix, inverting it and multiplying it with a
Vector 4 {pixelX*deep,pixelY*deep,deep,deep}.
However this doesn't give me the exact position.
When projecting from 3d to 2d the 3rd position of the resulting vector is not
equal to the 4th position, the value changes as a function of the distance from
camera to object and the near crop.
To get the exact point in 3d I now need to be able to reconstruct this 3rd
position in the vector.
Does anyone know how it is calculated?
Thanks
Patrick
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