Posted by gouessej on Feb 27, 2012; 10:55am
URL: https://forum.jogamp.org/Better-modifying-the-render-or-moving-the-camera-tp3780001p3780306.html

Hi

Modifying the viewport might be enough for your purpose (zoom in and out).

Edit.: maybe it is a bad idea. I'm going to look at how I implement zoom in first person shooters.

Edit.: The OpenGL FAQ advises to modify the projection matrix rather than using glScale or glViewport/glScissor.