I’m very new to openGL and not good at math ( and I blame myself for that also trying to fix this), but here it is:
I have my simple 2d game engine written in java, now I want to rewrite it in c++ with opengl support.
Currently I stuck in the beginning, I’ve read some articles\posts about lack of FPU support in old hand-held devices (like dingoo and similar) and decided to switch from -1,1 coordinate system to something better and with fixed values.
One of solution appeared in my mind is this: (replace X(-1,1), Y(-1,1),Z (-1,1) coordinate system with new one like X(-160,160,Y(-120,120),Z(-100,100) so I will be able to use glVertex3iv