A PlayDate version of my Sphere. Might still be prone to slight changes.

• Sphere data restructured to only contains unique edge data (less data moved around)
• No sorting needed to render the sphere.
• Sphere edge/star thickness based on position
• No UI (yet?)
• 1-bit graphics (because 1-bit screen).

• sphere.c contains the wireframe data for the sphere (vertices + edges)
• mat_math.c contains pure C for OpenGL-ish vec3/vec4/mat3/mat4 types and operations.
  • The matrices are in column order, like OpenGL.
  • The projection is based on a right-hand OpenGL basis (Y+ upwards, Z+ towards the camera).
  • Not everything was tested but given that most of the code has been written as needed, it should work more or less pretty well.
  • Inspiration : OpenGL, GLM.

Thanks to Heiko Behrens for testing the project on a real device and providing me timing info so I could fit the sketch under the targeted 30FPS budget.