LightManager

This method actually makes the lights effective by setting all of the appropriate OpenGL state variables. This should be called on every frame (or just once, but be sure that no other parts of the application change the lighting in that case).

Shows the positions of all the lights present in the world. Positional lights are rendered as spheres, and directional lights are rendered as arrows. This is intended as a debugging aid.

Note that directional lights don't actually have a position (they are infinitely far away). However, this method will approximate the source of the light by rendering it outside of the world.