Renderer: compile shaders as needed per configuration needed

[Voxar]

As the shader complexity grows with component complexity we don't want the same shader to be applied to every pixel.

Renderer should pick a shader based entity needs, and generate FLAG_ combinations as needed.

Shader selection based on render context. If doing cube map pass etc.

Should cubemap mode be a shader flag instead perhaps?

object reqs affecting shaders

• does it do lighting
• does it do animation
• does it have debug modes?

Shader debug modes driven by component? That visor injects? App that adds a "debug wand" that applies debug options?

• Store shader in renderObject
• Detect when component affecting shader flags change and re-select shader
• Generate flag keys to be able to compare shaders efficiently
• Sort rendering by shader type