sse2 integer IDCT. not the fastest possible implementation but it produces bit-identical results to the generic C version so it's fully "transparent".

* Overload if you already have the hash grid cell index */

Constructors for the CPU side.

* Returns the normal that was packed in there * * The returned normal is normalized */

* Returns true if the renderer needs the G-buffer of the previous frame. * * The boolean parameter is some additional condition that must be sati