Day 21: Specular Lights

Today i finished the refactoring of the shaders, and now they support specular lights...well actually only the point ligths for now, tomorrow i'll extend it to directional.

I worked in the past with shaders in Unity, which are quite the same thing of glsl, and this helped a lot.

I have a major problem though: the specular light apparently exceed the bounding box of the light, which lead to a light "cut off" at a certain distance from the emission point.

I must understand how this will affect the dimension of the box, i'll think on it tomorrow.