Nothing new here...

Back at the stereographic projection again. I'm going to stuff the world div with a triangle mesh. The world div instantiates at 520px square, but I will change the size based on the random circumference of my world. The center of the map is the 'north' pole, or the sunward pole of a tidally locked world, and the antipodes, the 'south' pole or nightside lies at the perimeter of the world circle...
I need to have a way of keeping track of my world div perimeter points and updating the world div. The initial triangle is the same, right now, and I'm writing a book here... This stuff needs to be in comments with my code!!!