public T SeperatePolygonGroup <T>(STGenericMesh mesh, int index)
where T : STGenericMesh, new()
{
T newMesh = new T();
newMesh.Name = index == 0 ? mesh.Name : $"{mesh.Name}_{index}";
Dictionary <STVertex, int> verticesNew = new Dictionary <STVertex, int>();
STPolygonGroup group = new STPolygonGroup();
group.Material = this.Material;
group.MaterialIndex = this.MaterialIndex;
newMesh.PolygonGroups.Add(group);
for (int i = 0; i < Faces.Count; i++)
{
if (!verticesNew.ContainsKey(mesh.Vertices[(int)Faces[i]]))
{
verticesNew.Add(mesh.Vertices[(int)Faces[i]], verticesNew.Count);
}
group.Faces.Add(Faces[i]);
}
newMesh.Vertices = verticesNew.Keys.ToList();
return(newMesh);
}
/// <summary>
/// Optmizes the indices by regenerating them from the given polygon group.
/// </summary>
/// <param name="group"></param>
public void Optmize(STPolygonGroup group)
{
Dictionary <STVertex, int> verticesNew = new Dictionary <STVertex, int>();
group.Faces.Clear();
foreach (var v in Vertices)
{
if (!verticesNew.ContainsKey(v))
{
verticesNew.Add(v, verticesNew.Count);
}
if (verticesNew.ContainsKey(v))
{
group.Faces.Add((uint)verticesNew[v]);
}
}
Vertices.Clear();
Vertices.AddRange(verticesNew.Keys);
}