Ruby + OpenGL = infinite abilities
summary
Uses the ruby-opengl gem and the jlfwe library to open a window, handle keyboard input and send vertex arrays to the GPU, builds a rotating scene rendered from triangles, and implements a pyramid primitive from four vertices. Controls map to rotation, translation and a spawn key that adds objects; the demo runs smoothly with about 3,000 pyramids but slows toward 10,000. Code is a single Ruby loop manipulating matrices, colors and per-vertex transforms and it works as shown.
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chapters (10)
- 0:00Intro
- 1:20Background
- 2:15Code
- 3:55OpenGL API
- 5:33Graphic programming
- 13:10Pyramid programming
- 14:42Drawing pyramid
- 17:45Rotating scene
- 23:05Adding more objects
- 25:55Adding 3000 objects
