public void edgesIntersectTest()
{
Ngon n = new Ngon(new double[][] { new double[] { 0, 1 }, new double[] { 0, -1 } });
//intersect
Edge e1 = new Edge(new Vertex(0, 0), new Vertex(1, 1));
Edge e2 = new Edge(new Vertex(1, 0), new Vertex(0, 1));
Assert.IsTrue(n.edgesIntersect(e1, e2));
//parallel
e1 = new Edge(new Vertex(0, 1), new Vertex(3, 1));
e2 = new Edge(new Vertex(0, 0), new Vertex(10, 0));
Assert.IsFalse(n.edgesIntersect(e1, e2));
//nonparallel, not intersect
e1 = new Edge(new Vertex(10, 0), new Vertex(8, 1));
e2 = new Edge(new Vertex(0, 0), new Vertex(3, 20));
Assert.IsFalse(n.edgesIntersect(e1, e2));
}
