We talked about 4x4 matrices, and our convention for storing them in column major order. For example, the GLSL constructor: mat4(0.,1.,2.,3., 4.,5.,6.,7., 8.,9.,10.,11., 12.,13.,14.,15.) represents:   0.   4.   8.   12.   1.   5.   9.   13.   2.   6.   10.   14.   3.   7.   11.   15. We talked about 4x4 matrix transformations, and the six most useful basic matrix primitives:   identity()       Set to:   1   0   0   0   0   1   0   0   0   0   1   0   0   0   0   1   translate(tx,ty,tz)       Transform by:   1   0   0   tx   0   1   0   ty   0   0   1   tz   0   0   0   1   rotateX(θ)       Transform by:   1   0   0   0   0   cos θ   -sin θ   0   0   sin θ   cos θ   0   0   0   0   1   rotateY(θ)       Transform by:   cos θ   0   sin θ   0   0   1   0   0   -sin θ   0   cos θ   0   0   0   0   1   rotateZ(θ)       Transform by:   cos θ   -sin θ   0   0   sin θ   cos θ   0   0   0   0   1   0   0   0   0   1   scale(sx,sy,sz)       Transform by:   sx   0   0   0   0   sy   0   0   0   0   sz   0   0   0   0   1 At the end of Tuesday's lecture we watched WORLD BUILDER by Bruce Branit The code for everything we did in class this week is at: hw4.zip Homework -- due before start of class on Thursday March 5 For homework, you need to implement a Matrix object and apply it to animate that triangle strip we created in class. I got you started by creating a Javascript class for Matrix objects. You can see it near the bottom of index.html, in the section that looks like: function Matrix() { ... } let matrix = new Matrix(); Your job is to finish implementing the Matrix class, and then apply it to creating an animation. Also, if you are feeling ambitious, feel free to modify the vertex[] array in lib3.js to create a different shape. As usual, be creative. Use your imagination. Impress me. :-)