public static int AddPolygon(Mesh mesh, Poly2Tri.Polygon polygon, Vector3 offset = new Vector3())
{
int indexFirst = mesh.Vertices.Count;
if (polygon == null)
{
return indexFirst;
}
int vertCountPrev = mesh.Vertices.Count;
Vertex[] verts = new Vertex[polygon.Points.Count];
List<int> indices = new List<int>();
for (int i = 0; i < polygon.Points.Count; i++)
{
TriangulationPoint p = polygon.Points[i];
Vector3 v = new Vector3((float)p.X, (float)p.Y, 0) + offset;
float tx = (float)((p.X - polygon.MinX) / (polygon.MaxX - polygon.MinX));
float ty = (float)((p.Y - polygon.MinY) / (polygon.MaxY - polygon.MinY));
Vector2 tc = new Vector2(tx, ty);
//verts[i] = new Vertex(v, tc);
mesh.Vertices.Add(new Vertex(v, tc));
}
foreach (Poly2Tri.DelaunayTriangle t in polygon.Triangles)
{
int index0, index1, index2;
index0 = polygon.IndexOf(t.Points._0);
index1 = polygon.IndexOf(t.Points._1);
index2 = polygon.IndexOf(t.Points._2);
//Sometimes the index is -1 and I don't know why. Ignore those points.
if (index0 < 0 || index1 < 0 || index2 < 0)
{
continue;
}
mesh.AddTriangle(index0 + vertCountPrev, index1 + vertCountPrev, index2 + vertCountPrev);
}
return indexFirst;
}
public static Model CreatePolygon(Poly2Tri.Polygon polygon, Vector3 offset = new Vector3())
{
Mesh mesh = new Mesh();
AddPolygon(mesh, polygon, offset);
Model model = new Model(mesh);
return model;
}
private static PolygonSet FromP2T(Poly2Tri.PolygonSet pset)
{
var result = new PolygonSet();
foreach (var poly in pset.Polygons)
{
foreach (var tri in poly.Triangles)
{
var rtri = new Polygon();
rtri.Add(new PolygonPoint { X = tri.Points[0].Xf, Y = tri.Points[0].Yf });
rtri.Add(new PolygonPoint { X = tri.Points[1].Xf, Y = tri.Points[1].Yf });
rtri.Add(new PolygonPoint { X = tri.Points[2].Xf, Y = tri.Points[2].Yf });
result.Add(rtri);
}
}
return result;
}
