public Edge CreateEdge()
{
Edge e = OwnerMesh.CreateEdge();
AddEdge(e);
return(e);
}
public Edge Split(double split_param)
{
//calculate position of new vertex
Point3D p0 = Vertices[0].Pos;
Point3D p1 = Vertices[1].Pos;
Point3D splitp = p0 + (p1 - p0) * split_param;
//create the new vertex and set it up
Vertex first_vertex = Vertices[0];
Vertex last_vertex = Vertices[1];
Vertex new_vertex = OwnerMesh.CreateVertex();
new_vertex.Pos = splitp; //it's at the split point
//create new edge
Edge new_edge = OwnerMesh.CreateEdge();
//link new vert/edge into owning faces
foreach (Face f in OwnerFaces)
{
f.AddVertex(new_vertex);
f.InsertEdge(new_edge, this);
}
//fix up the new edges
SetVertex(0, first_vertex);
SetVertex(1, new_vertex);
new_edge.SetVertex(0, new_vertex);
new_edge.SetVertex(1, last_vertex);
return(new_edge);
}
public void TransferFaceTo(Face f, Mesh mesh)
{
if (mesh.Shape != Shape)
{
throw new System.ApplicationException("Can not transfer faces between shapes");
}
//transfer the face
Faces.Remove(f);
mesh.Faces.Add(f);
f.OwnerMesh = mesh;
//go over each edge in the face and copy it over
for (int edgeidx = 0; edgeidx < f.Edges.Count; edgeidx++)
{
//get the edge and remove the face from it
Edge e = f.Edges[edgeidx];
e.OwnerFaces.Remove(f);
//create a new edge and replace it
Edge newedge = mesh.CreateEdge();
newedge.OwnerFaces.Add(f);
f.Edges[edgeidx] = newedge;
//set the 2 vertex references
newedge.SetVertex(0, e.Vertices[0]);
newedge.SetVertex(1, e.Vertices[1]);
}
}
public void TransferFaceTo(Face f, Mesh mesh)
{
if (mesh.Shape != Shape)
throw new System.ApplicationException("Can not transfer faces between shapes");
//transfer the face
Faces.Remove(f);
mesh.Faces.Add(f);
f.OwnerMesh = mesh;
//go over each edge in the face and copy it over
for(int edgeidx = 0; edgeidx < f.Edges.Count; edgeidx++)
{
//get the edge and remove the face from it
Edge e = f.Edges[edgeidx];
e.OwnerFaces.Remove(f);
//create a new edge and replace it
Edge newedge = mesh.CreateEdge();
newedge.OwnerFaces.Add(f);
f.Edges[edgeidx] = newedge;
//set the 2 vertex references
newedge.SetVertex(0, e.Vertices[0]);
newedge.SetVertex(1, e.Vertices[1]);
}
}
public Shape Copy()
{
//create a new shape and copy the vertices
Shape shape = new Shape();
foreach (Vertex v in Vertices)
{
Vertex copy = shape.CreateVertex();
copy.Pos = v.Pos;
}
//put new vertices in a quick look up table
Vertex[] newverts = shape.Vertices.ToArray();
//go over each convex
foreach (Mesh c in Convexes)
{
//create a new convex in the new shape
Mesh convexcopy = shape.CreateConvex();
//copy edges
foreach (Edge e in c.Edges)
{
//create the edge and use look up table to build new vertex list
Edge edgecopy = convexcopy.CreateEdge();
edgecopy.Vertices = e.Vertices.Select(a => newverts[a.Idx]).ToArray();
//add this edge to each of the vertices it uses
foreach (Vertex v in edgecopy.Vertices)
{
v.OwnerEdges.Add(edgecopy);
}
}
//build look up table for the edges
Edge[] newedges = convexcopy.Edges.ToArray();
//copy faces
foreach (Face f in c.Faces)
{
//create the face and use look up tables to build new vertex/edge list
Face facecopy = convexcopy.CreateFace();
facecopy.Vertices = f.Vertices.Select(a => newverts[a.Idx]).ToList();
facecopy.Edges = f.Edges.Select(a => newedges[a.Idx]).ToList();
//add this face to each of the vertices it uses
foreach (Vertex v in facecopy.Vertices)
{
v.OwnerFaces.Add(facecopy);
}
//add this face to each of the edges it uses
foreach (Edge e in facecopy.Edges)
{
e.OwnerFaces.Add(facecopy);
}
}
}
return(shape);
}
