I've found examples online of how to perform diffusion lighting but I can't seem to find any regarding how things would change when using skeletal matrices.
Does anyone have an example I could look at?
I specifically used this page as an example to learn diffusion lighting: http://learningwebgl.com/blog/?p=684
No matter what kind of transformation you apply to your vertices, the most important thing is to keep consistent; know in what space you are performing your transformations. Assuming object_matrix is the transformation of your object and camera_matrix the view transformation:
vec4 pos = VertexPosition;
// pos is in object space
pos = object_matrix * pos;
// pos is now in world space
pos = camera_matrix * pos;
// view space
Light coordinates are usually in world space, in which case:
pos = object_matrix * pos;
// perform diffuse lighting computations here
pos = camera_matrix * pos;
If by "skeletal matrices" you refer to skeletal animation, they're done in object space.
Hope this helps.
