This is an example project to show how to render a Galaxy in OpenGL on the iPhone. To simulate interstellar dust realistically with unsorted point sprites in OpenGL, I've implemented a GPU based ray tracing algorithm. This Milky Way model is used in the Exoplanet App.
OpenGL Milky Way is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
OpenGL Milky Way is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with OpenGL MilkyWay. If not, see http://www.gnu.org/licenses/.