Is it possible to easily implement attenuating light (you have moving objects or light source, and as they get further from each other, the object becomes darker)?
The way I understand it is, if an object has a face that is facing the light source it will be fully lit no matter distance. Can I change this?
*Disclaimer: I remember very little from the OpenGL deprecated functions
You have to set the attenuation parameter for that light.
So something similar to:
glLightf(GL_LIGHT0, GL_CONSTANT_ATTENUATION, 0.5f);
The default value is 1.0 for attenuation, which means no attenuation. And the min value is 0.
Down near the bottom of this page is a more detailed explanation of the attenuation parameters and how the attenuation is computed.
http://www.khronos.org/opengles/sdk/1.1/docs/man/glLight.xml