I’m having some trouble trying to understand how to manage working with projection matrix, specifically with orthographic one.
For example, using one the X axis, I set my left coord to -11 and my right coord to -1. In this case, I will have -(l + r)/2 => -(-11 - 1) / 2 => 12/6 => 6.
How is it possible if I’ve defined a volume of 10? Is there a rule that the right coord must be positive?