In this scenario, the frustum is not a perfect cube, right? So when you map it to a normalized cube, how do you deal with this? Or rather, how does one convert it to a normalized cube if the dimensions/shapes don't match?
acb575
The frustum is not a cube but you use a perspective transform to map it to a cube.
This goes into more detail - http://www.scratchapixel.com/lessons/3d-basic-rendering/perspective-and-orthographic-projection-matrix/projection-matrices-what-you-need-to-know-first
In this scenario, the frustum is not a perfect cube, right? So when you map it to a normalized cube, how do you deal with this? Or rather, how does one convert it to a normalized cube if the dimensions/shapes don't match?
The frustum is not a cube but you use a perspective transform to map it to a cube.
This goes into more detail - http://www.scratchapixel.com/lessons/3d-basic-rendering/perspective-and-orthographic-projection-matrix/projection-matrices-what-you-need-to-know-first