more at: http://stackoverflow.com/a/6084814/1250044
more at: http://codepen.io/danilo-teixeira/pen/hAmxz
more at: http://cssdeck.com/labs/foorbnwt
more at: http://codepen.io/soulwire/pen/DoIuf
more at: http://codepen.io/soulwire/pen/zfwnG
pointInPoly: http://www.isogenicengine.com/2010/10/13/spotlight-detecting-polygon-collision-in-javascript/ http://codyseibert.com/blog/?p=293
more at: http://jonobr1.github.io/Physics/
more at: http://www.somethinghitme.com/2013/01/09/creating-a-canvas-platformer-tutorial-part-one/
more at: http://codepen.io/jackrugile/pen/fpADK
more at: http://codepen.io/jackrugile/pen/yfJBK
more at: http://codepen.io/gschier/pen/zxFGs
more at: http://stackoverflow.com/a/8636471/1250044
more at: http://homepage.ntlworld.com/infinnerty/differences/fireworks/index.html
more at: http://homepage.ntlworld.com/infinnerty/differences/mini-sketch/mini-sketch.html
more at: http://seb.ly/2009/09/simple-3d-in-html5-canvas/
more at: http://madebyevan.com/gamedevclass/
more at: http://codepen.io/jordanranson/pen/ckIso
http://fearhat.bplaced.net/phscs/
more at: http://radokirov.com/experiments/text.html