var Tess2 = require('tess2');
// Define input
var ca = [0,0, 10,0, 5,10];
var cb = [0,2, 10,2, 10,6, 0,6];
var contours = [ca,cb];
// Tesselate
var res = Tess2.tesselate({
	contours: contours,
	windingRule: Tess2.WINDING_ODD,
	elementType: Tess2.POLYGONS,
	polySize: 3,
	vertexSize: 2
});
// Use vertices
for (var i = 0; i < res.vertices.length; i += 2) {
	drawVertex(res.vertices[i], res.vertices[i+1]);
}
// Use triangles
for (var i = 0; i < res.elements.length; i += 3) {
	var a = res.elements[i], b = res.elements[i+1], c = res.elements[i+2];
	drawTriangle(res.vertices[a*2], res.vertices[a*2+1],
		res.vertices[b*2], res.vertices[b*2+1],
		res.vertices[c*2], res.vertices[c*2+1]);
}