protected void GetPlanarPolys(PlanarRegion r, List <Polygon2d> polys)
{
try {
MeshRegionBoundaryLoops loops = new MeshRegionBoundaryLoops(r.Mesh, r.Triangles);
foreach (var loop in loops)
{
DCurve3 curve = loop.ToCurve();
Polygon2d poly = new Polygon2d();
int NV = curve.VertexCount;
for (int k = 0; k < NV; k++)
{
poly.AppendVertex(curve[k].xy);
}
polys.Add(poly);
}
} catch (Exception) {
// add each triangle as a polygon and let clipper sort it out
Vector3d v0 = Vector3d.Zero, v1 = Vector3d.Zero, v2 = Vector3d.Zero;
foreach (int tid in r.Triangles)
{
r.Mesh.GetTriVertices(tid, ref v0, ref v1, ref v2);
Polygon2d p = new Polygon2d();
p.AppendVertex(v0.xy); p.AppendVertex(v1.xy); p.AppendVertex(v2.xy);
polys.Add(p);
}
}
}
public static void test_region_boundary()
{
List<int> cases = new List<int>() { 0, 1, 2, 3 };
foreach ( int num in cases ) {
string name;
DMesh3 mesh = MakeBoundaryTestMesh(num, out name);
int[][] groups = FaceGroupUtil.FindTriangleSetsByGroup(mesh, 0);
System.Console.WriteLine("case {0}:", name);
for (int k = 0; k < groups.Length; ++k) {
int gid = mesh.GetTriangleGroup(groups[k][0]);
MeshRegionBoundaryLoops loops = new MeshRegionBoundaryLoops(mesh, groups[k]);
System.Console.WriteLine(" gid {0} : found {1} loops", gid, loops.Loops.Count);
}
}
}
