NewAmbient returns a pointer to a new ambient color with the specified color and intensity.

NewDirectional creates and returns a pointer of a new directional light the specified color and intensity.

NewPoint creates and returns a point light with the specified color and intensity.

NewSpot creates and returns a spot light with the specified color and intensity.

Ambient represents an ambient light.

Directional represents a directional, positionless light.

Point is an omnidirectional light source.

Spot represents a spotlight.

ILight is the interface that must be implemented for all light types.