Ok, I’ve got a dumb question which probably means I don’t understand OpenGL that well. When I use the 2D glVertex function I always have to put coordinates in that run from -1 to 1.
For the X-axis -1 is the left most part of the display and 1 is the right most part.
For Y it is what you would expect, -1 for the lowest, and 1 for the highest. How can I change the scaling so that I can use larger values, like 0 to 255 or some other scale?