Grid Deformations

Topic:
Functions
Because… reasons. (How my daughter answers questions.) At http://mathhombre.tumblr.com/post/131821215449/grid-deformations-because-reasons-how-my I have several examples. I like odd function visualizations. First couple I show have y-matters on vertical endpoints and x on horizontal, then I played with mixing and breaking symmetry. mathjax.tumblr.com requested the source, so here it is!
More GGB at bit.ly/mh-ggb