/ Published in: JavaScript
Author: Wm. Randolph Franklin, rewritten for JS
poly {Array}: [{x1,y1},{x2,y2},...]
pt {Object}: {click.x,click.y}
poly {Array}: [{x1,y1},{x2,y2},...]
pt {Object}: {click.x,click.y}
URL: http://www.faqs.org/faqs/graphics/algorithms-faq/