How do I draw a white crosshair in the middle of screen in openGL, it's all well and good knowing how to render objects in 3d space, but I have literally no idea on how to draw something that sticks on the screen no matter what
Would this require a shader? one that does not take into account model view projection matrix? at what point would i draw the cross? after everything to coincide with the painters algorithm? Or do I give it a z value?