public static MeshGeometry Combine(params MeshGeometry[] geometries)
{
if (geometries.Length == 1)
{
return(geometries[0]);
}
var verts = new List <Vertex>();
var triangles = new List <Triangle>();
foreach (var geom in geometries)
{
verts.AddRange(geom.Vertices);
triangles.AddRange(geom.Triangles);
}
var newGeom = new MeshGeometry();
newGeom.SetVertices(verts);
newGeom.SetTriangles(triangles);
newGeom.BreakReferences();
return(newGeom);
}
public void SeparateDistinctSurfaces()
{
var uniqueEdges = Triangles.SelectMany(t => t.Edges).EqualsDistinct().ToList();
Edge.CompareByPosition = false;
var edgeFaces = new Dictionary <Edge, List <Triangle> >();
foreach (var tri in Triangles)
{
for (int i = 0; i < 3; i++)
{
if (edgeFaces.TryGetValue(tri.Edges[i], out List <Triangle> faces))
{
if (!faces.Contains(tri))
{
faces.Add(tri);
}
}
else
{
edgeFaces.Add(tri.Edges[i], new List <Triangle>()
{
tri
});
}
}
}
var triList = Triangles.ToList();
void AddConnectedFaces(Triangle tria, List <Triangle> remainingFaces, List <Triangle> currentFaces)
{
if (!currentFaces.Any())
{
remainingFaces.Remove(tria);
currentFaces.Add(tria);
}
var connectedFaces = tria.Edges.SelectMany(x => edgeFaces[x]).Where(y => y != tria);
var facesToAdd = connectedFaces.Intersect(remainingFaces).ToList();
foreach (var face in facesToAdd)
{
remainingFaces.Remove(face);
currentFaces.Add(face);
}
foreach (var face in facesToAdd)
{
AddConnectedFaces(face, remainingFaces, currentFaces);
}
}
var geomList = new List <MeshGeometry>();
while (triList.Any())
{
var curTri = triList[0];
var curTriList = new List <Triangle>();
AddConnectedFaces(curTri, triList, curTriList);
var curGeom = new MeshGeometry();
curGeom.SetTriangles(curTriList, true);
curGeom.BreakReferences();
geomList.Add(curGeom);
}
}