public virtual bool Extrude()
{
MeshEditor editor = new MeshEditor(Mesh);
editor.SeparateTriangles(Triangles, true, out EdgePairs);
MeshNormals normals = null;
bool bHaveNormals = Mesh.HasVertexNormals;
if (!bHaveNormals)
{
normals = new MeshNormals(Mesh);
normals.Compute();
}
ExtrudeVertices = new MeshVertexSelection(Mesh);
ExtrudeVertices.SelectTriangleVertices(Triangles);
Vector3d[] NewVertices = new Vector3d[ExtrudeVertices.Count];
int k = 0;
foreach (int vid in ExtrudeVertices)
{
Vector3d v = Mesh.GetVertex(vid);
Vector3f n = (bHaveNormals) ? Mesh.GetVertexNormal(vid) : (Vector3f)normals.Normals[vid];
NewVertices[k++] = ExtrudedPositionF(v, n, vid);
}
k = 0;
foreach (int vid in ExtrudeVertices)
{
Mesh.SetVertex(vid, NewVertices[k++]);
}
SetGroupID = Group.GetGroupID(Mesh);
JoinTriangles = editor.StitchUnorderedEdges(EdgePairs, SetGroupID);
return(true);
}
