private IEnumerable<Triangle> GetMeshTriangles(TriangleNet.Mesh mesh)
{
List<Vector3> vertices = new List<Vector3>();
foreach (var vertex in mesh.Vertices)
{
vertices.Add(TransformTo3D(new IntPoint((long)vertex.X, (long)vertex.Y)));
}
foreach (var triangle in mesh.Triangles)
{
yield return new Triangle(vertices[triangle.P0], vertices[triangle.P1], vertices[triangle.P2]);
}
}
public static List<Point> GetTriangleAsPoints(ref TriangleNet.Data.Triangle triangle)
{
Vertex v1 = triangle.GetVertex(0);
Vertex v2 = triangle.GetVertex(1);
Vertex v3 = triangle.GetVertex(2);
List<Point> points = new List<Point>();
points.Add(new Point(v1.X, v1.Y, v1.Attributes[0]));
points.Add(new Point(v2.X, v2.Y, v2.Attributes[0]));
points.Add(new Point(v3.X, v3.Y, v3.Attributes[0]));
return points;
}
public static bool Contains(ref TriangleNet.Data.Triangle triangle, double x, double y)
{
Vertex v1 = triangle.GetVertex(0);
Vertex v2 = triangle.GetVertex(1);
Vertex v3 = triangle.GetVertex(2);
Vertex pt = new Vertex(x, y);
bool b1, b2, b3;
b1 = Sign(ref pt, ref v1, ref v2) < 0.0f;
b2 = Sign(ref pt, ref v2, ref v3) < 0.0f;
b3 = Sign(ref pt, ref v3, ref v1) < 0.0f;
return ((b1 == b2) && (b2 == b3));
}
public static Polygon GetPolygon(ref TriangleNet.Data.Triangle triangle)
{
List<Coordinate> coords = new List<Coordinate>();
Vertex v1 = triangle.GetVertex(0);
coords.Add(new Coordinate(v1.X, v1.Y));
v1 = triangle.GetVertex(1);
coords.Add(new Coordinate(v1.X, v1.Y));
v1 = triangle.GetVertex(2);
coords.Add(new Coordinate(v1.X, v1.Y));
return new Polygon(coords);
}
List<Vertex> IndexVertices(TriangleNet.Data.Triangle triangle, Dictionary<int, int> indexDict, ref int highestIndex, out int[] newIndices)
{
var newVertices = new List<Vertex>();
newIndices = new int[3];
if (indexDict.ContainsKey(triangle.P0))
{
newIndices[0] = indexDict[triangle.P0];
}
else
{
TriangleNet.Data.Vertex vertex0 = triangle.GetVertex(0);
newVertices.Add(new Vertex((float)vertex0.X, (float)vertex0.Y));
indexDict.Add(vertex0.ID, highestIndex);
newIndices[0] = highestIndex;
highestIndex++;
}
if (indexDict.ContainsKey(triangle.P1))
{
newIndices[1] = indexDict[triangle.P1];
}
else
{
TriangleNet.Data.Vertex vertex1 = triangle.GetVertex(1);
newVertices.Add(new Vertex((float)vertex1.X, (float)vertex1.Y));
indexDict.Add(vertex1.ID, highestIndex);
newIndices[1] = highestIndex;
highestIndex++;
}
if (indexDict.ContainsKey(triangle.P2))
{
newIndices[2] = indexDict[triangle.P2];
}
else
{
TriangleNet.Data.Vertex vertex2 = triangle.GetVertex(2);
newVertices.Add(new Vertex((float)vertex2.X, (float)vertex2.Y));
indexDict.Add(vertex2.ID, highestIndex);
newIndices[2] = highestIndex;
highestIndex++;
}
return newVertices;
}
