private static ModelVisual3D Planar(IFeature basePath)
{
TongJi.Geometry.Polyline curve = new TongJi.Geometry.Polyline(basePath.GeoData);
if (curve.AlgebraicArea < 0)
{
curve = curve.ReversePoints();
}
var points = curve.Points.ToList();
if (points.Last() == points.First())
{
points.RemoveAt(points.Count - 1);
}
var triangles = DelaunayOfPolygon(points);
MeshBuilder mb = new MeshBuilder();
foreach (var tri in triangles)
{
var a = new Point3D(tri.A.x, tri.A.y, 0);
var b = new Point3D(tri.B.x, tri.B.y, 0);
var c = new Point3D(tri.C.x, tri.C.y, 0);
mb.AddTriangle(a, b, c);
}
ModelVisual3D visual = new ModelVisual3D();
visual.Content = new GeometryModel3D(mb.ToMesh(), MaterialHelper.CreateMaterial(Colors.Blue));
return(visual);
}
public static MeshBuilder Planar(TongJi.Geometry.Polyline curve)
{
if (curve.AlgebraicArea < 0)
{
curve = curve.ReversePoints();
}
var points = curve.Points.ToList();
if (points.Last() == points.First())
{
points.RemoveAt(points.Count - 1);
}
var triangles = DelaunayOfPointSet(points);
//var vertices = new FarseerPhysics.Common.Vertices(curve.Points.Select(p => new Microsoft.Xna.Framework.Vector2((float)p.x, (float)p.y)).ToArray());
//var triangles = FarseerPhysics.Common.Decomposition.EarclipDecomposer.TriangulatePolygon(vertices);
//var vertices = new TongJi.Geometry.Computational.Vertices(curve.Points.Select(p => new TongJi.Geometry.Computational.Vector2((float)p.x, (float)p.y)));
//var decomp = new TongJi.Geometry.Computational.Decompose();
//var triangles = decomp.Run(vertices);
//int index0 = 0;
//var points = curve.Points.Select(p => new Point3D((float)p.x, (float)p.y, 0)).ToList();
//int pointCount = curve.Count;
MeshBuilder mb = new MeshBuilder();
//points.ForEach(p => mb.Vertices.Add(p));
//Vector3D normal = Vector3D.Zero;
//if (pointCount > 2)
//{
// normal = (points[1] - points[0]).Cross(points[2] - points[0]).Normalize();
//}
//points.ForEach(p => mb.Normals.Add(normal));
//mb.MakePlanarFaces(index0, pointCount);
foreach (var tri in triangles)
{
var a = tri.A.ToPoint3D();
var b = tri.B.ToPoint3D();
var c = tri.C.ToPoint3D();
mb.AddTriangle(a, b, c);
//if ((b - a).Cross(c - a).z > 0)
//{
// mb.AddTriangle(a, b, c);
//}
//else
//{
// mb.AddTriangle(a, c, b);
//}
}
return(mb);
}
