* TODO describe effect of incident triangles
*/
public List<TriangleXZ> getVoronoiCellSectors(VectorXYZ point,
Collection<DelaunayTriangle> incidentTriangles) {
final VectorXZ pointXZ = point.xz();
/* build sorted list of triangles
* by starting at any incidentTriangle and going left and right
* around the point, appending neighbors. */