fix cmake version and source
fix cmake version and source

stiXits/demo_lod,stiXits/demo_ter,stephde/CG2Uebung,stephde/CG2Uebung,stiXits/demo_ter,stiXits/demo_ray,stiXits/demo_lod,stiXits/demo_ter,stiXits/demo_ray,stiXits/demo_lod,stephde/CG2Uebung,stiXits/demo_ray