I set up a tool that allows user to adjust the light amount from a light source. Any models’ colors will turn darker or lighter if the light amount is changed. But for a particular model, I want it to be independent from the light source. No matter how dark the environment is, I always want the model to show its full, true colors as if it gains full light. What should I do when rendering this model? Your help is much appreciated.
You might disable lighting (glDisable( GL_LIGHTING))when you draw that model or you can use texture environment (glTexEnv) which does not use vertex color (e.g. GL_REPLACE) when you draw that model.
You might also have the object contain the light-parameters that it “needs”, allowing you to easily keep track of different light settings for different objects.
Another option is to have a list of lights and each object have a pointer into this list (makes it easier if several objects use identical lighting params).