19 Apr 2017 linkMouse Picking with Ray Casting - Anton's OpenGL 4 Notesantongerdelan.net/opengl/raycasting.html ↗raycastingopengl
15 Apr 2017 linkIntroductory Democoding with ShaderToybitbucket.org/inclinescene/demosplash-2016 ↗openglshadersraycastingshadertoy
13 Jan 2016 linkLode's Computer Graphics Tutorial - Raycastinglodev.org/cgtutor/raycasting.html ↗tutorialcgfxraycasting