Understanding ofLight

@cuinjune wrote:

Hi, I'm trying to understand how ofLight works.

Based on the documentation, it says there are 4 main lighting types that are
- Spot light
- Point light
- Directional light
- Ambient light.

So there are corresponding setter methods that are

• setSpotlight();
• setPointLight();
• setDirectional();
• ?

But I couldn't find any method called "setAmbientLight()".
I could find there is "setAreaLight()" instead. Is this the right one for setting the ambient light?

Also, what does it mean by "only programmable renderer" in ofLight.h

enum ofLightType {
	OF_LIGHT_POINT=0,
	OF_LIGHT_DIRECTIONAL=1,
	OF_LIGHT_SPOT=2,
	OF_LIGHT_AREA=3 // Only programmable renderer
};

And there are methods such as "setAmbientColor()", "setDifuseColor()" and "setSpecularColor()" which I can find these in ofMaterial class as well.
I would like to know how they are different from ofMaterial's methods when applied to ofLight;

And lastly, I wonder what "setSpotlightCutOff()" and "setAttenuation()" do in ofLight.
I tried to find the detailed information about ofLight but this documentation was all I could find.
http://openframeworks.cc/documentation/gl/ofLight/

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