Joy of painting with Ruby and OpenGL
summary
Uses Ruby with the opengl-bindings gem and GLFW to open a resizable window, register callbacks, and render GPU-driven geometry. Code builds low-level primitives (points, lines, triangles), a box class from 8 vertices, and an animated umbrella approximated by triangles; animation toggles angle between min/max and shows 8, 16, 116 segments to demonstrate smoothing via triangulation. Demo runs (escape closes window); Ruby adds CPU/memory overhead versus C but rendering runs on the GPU.
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chapters (19)
- 0:00Intro
- 4:00Drawing Linear Geometry
- 7:18Rotating
- 8:57Applying colors
- 12:06Drawing sun umbrella
- 13:33Drawing box
- 16:01Adding rotation
- 16:47Triangles
- 19:45Control
- 20:42Angle
- 24:48Production examples
- 27:13Opengl to Ruby
- 28:18Opengl vs Ruby
- 29:40Game engines in Ruby
- 31:10Can you use OpenGL to make something difficult
- 33:13OpenGL Vulkan API
- 34:01Interactive drawings
- 34:38Dragon Ruby
- 35:33Outro
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