public List <OpenGL.Vector3> Vertices()
{
List <OpenGL.Vector3> vertices = new List <OpenGL.Vector3>();
foreach (Face f in Faces)
{
foreach (PointD p in f.GetPoints())
{
var vec = new OpenGL.Vector3((float)p.X, (float)p.Y, (float)p.Z);
if (!vertices.Contains(vec))
{
vertices.Add(vec);
}
}
}
return(vertices);
}