public int GetTotalNumVertices()
{
int numverts = 0;
if (Top != null)
{
numverts += Top.GetNumVertices();
}
if (Bottom != null)
{
numverts += Bottom.GetNumVertices();
}
if (Left != null)
{
numverts += Left.GetNumVertices();
}
if (Right != null)
{
numverts += Right.GetNumVertices();
}
if (Front != null)
{
numverts += Front.GetNumVertices();
}
if (Back != null)
{
numverts += Back.GetNumVertices();
}
return(numverts);
}