WASD and Arrow keys to move the camera in 3D space. Change the slider to view the progression of the portalizer The state of Gamma Engine from last year from now. It demonstrates a portal generation algorithm (the portalizer) for BSP meshes that I was working on at the time. It remains unfinished and I don't plan to work on this in scratch. I hope this will be helpful to some who may be interested in the concept of the quake engine portalizer and PVS(potentially visible set)
