We showed how to set GLSL uniform variables of various types, including floats, and arrays of vec3, vec4 and mat4, within Javascript. Then we implemented a simple version of reflection. The code for everything we did in class this week is at: hw3.zip Since everything we covered is contained in the code and in the comments on that code, I will keep this short. Homework -- due before start of class on Thursday Feb 27 For homework, create a ray traced scene that uses everything we have covered so far: ray tracing to multiple spheres with multiple lights, phong reflectance, procedural textures, and using reflection to turn objects into mirrors. See if you can use noise-based procedural textures in unusual ways to create cool visual effects. Also, expand on what I did with the slider to create a Graphic User Interface (GUI) that allows visitors to your webpage to control various aspects of the ray traced scene. Try using various types of HTML input elements, which you can learn more about HERE. Be creative. Use your imagination. Impress me.