Builds a left-handed view matrix from a eye position, a point to look at and an up vector.

Return Dword = DX11 BUILD LOOKAT LHMATRIX(eyePos, lookAtPos, upVector, [resultMatrix])

eyePos

Dword
A vector3 that contains the eye position ("position of the camera").

lookAtPos

Dword
A vector3 that contains the look-at position of the view matrix to be created (the focal point).

upVector

Dword
A vector3 that describes the up vector of the matrix to be created. With default settings, the up vector is (0, 1, 0), that is the up direction is along the positive Y axis.

[Optional] resultMatrix

Dword
The matrix to write the created view matrix to. Can be omitted, in which case a temporary matrix holding the generated view matrix will be returned.

The resultMatrix, if one was provided, or a newly created temporary matrix holding the resulting matrix otherwise.

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