/**
* Report triangles surrounding site in order (cw or ccw).
* @param site we want the surrounding triangles for this site
* @param triangle a "starting" triangle that has site as a vertex
* @return all triangles surrounding site in order (cw or ccw)
* @throws ArgumentException if site is not in triangle
*/
public List<Triangle> surroundingTriangles(Pnt site, Triangle triangle)
{
if (!triangle.Contains(site))
throw new ArgumentException("Site not in triangle");
List<Triangle> list = new List<Triangle>();
Triangle start = triangle;
Pnt guide = triangle.getVertexButNot(site); // Affects cw or ccw
while (true) {
list.AddIfNotContains(triangle);
Triangle previous = triangle;
triangle = neighborOpposite(guide, triangle); // Next triangle
guide = previous.getVertexButNot(site, guide); // Update guide
if (triangle == start) break;
}
return list;
}