public bool AppendMesh(IMesh appendMesh, IndexMap mergeMapV, out int[] mapV, int appendGID = -1)
{
mapV = new int[appendMesh.MaxVertexID];
foreach (int vid in appendMesh.VertexIndices())
{
if (mergeMapV.Contains(vid))
{
mapV[vid] = mergeMapV[vid];
}
else
{
NewVertexInfo vinfo = appendMesh.GetVertexAll(vid);
int newvid = Mesh.AppendVertex(vinfo);
mapV[vid] = newvid;
}
}
foreach (int tid in appendMesh.TriangleIndices())
{
Index3i t = appendMesh.GetTriangle(tid);
t.a = mapV[t.a];
t.b = mapV[t.b];
t.c = mapV[t.c];
int gid = appendMesh.GetTriangleGroup(tid);
if (appendGID >= 0)
{
gid = appendGID;
}
Mesh.AppendTriangle(t, gid);
}
return(true);
}
/// <summary>
/// Make a copy of provided triangles, with new vertices. You provide MapV because
/// you know if you are doing a small subset or a full-mesh-copy.
/// </summary>
public List <int> DuplicateTriangles(IEnumerable <int> triangles, ref IndexMap MapV, int group_id = -1)
{
List <int> new_triangles = new List <int>();
foreach (int tid in triangles)
{
Index3i tri = Mesh.GetTriangle(tid);
for (int j = 0; j < 3; ++j)
{
int vid = tri[j];
if (MapV.Contains(vid) == false)
{
int new_vid = Mesh.AppendVertex(Mesh, vid);
MapV[vid] = new_vid;
tri[j] = new_vid;
}
else
{
tri[j] = MapV[vid];
}
}
int new_tid = Mesh.AppendTriangle(tri, group_id);
new_triangles.Add(new_tid);
}
return(new_triangles);
}
