** plOpenGL: SWI-Prolog OpenGL Bindings ** Copyright (C) 2012 Jan Tatham (http://www.sebity.com, jan@sebity.com) plOpenGL is free software; you can redistribute it and/or modify it under the terms of the one of GNU LESSER GENERAL PUBLIC LICENSE version 2.1 (See file LICENSE.LGPL provided in plOpenGL distribution archive for details).