Axiom Metal Migration Ref

If you're porting graphics code from OpenGL or DirectX to Metal, this is the reference you keep open in a side tab. It covers the essentials: GLSL and HLSL to Metal Shading Language conversions, type mappings, API equivalents, and pipeline setup for MTKView and CAMetalLayer. The 948 stars suggest it's already helping a lot of people through the migration pain. It's comprehensive enough to be useful whether you're doing a full engine port or just need to remember what the Metal equivalent of a specific GL call is. Straightforward documentation that does exactly what it says.