Implement render method
- Method signature: render(shader_path, uniforms=None, update_screen=True)
- Compute frame and return RGB array.
- Update Scene.screen if update_screen=True.
Support basic mesh objects
- Cube and Sphere classes.
- Optional: simple OBJ loader.
Screen buffer attribute
- Implement screen attribute to store last rendered frame.
Implement render method
Support basic mesh objects
Screen buffer attribute