SubDVertex ideas

subdvertex.cs

struct SubDVertex
{
  SubD m_parent;
  IntPtr m_ptr_vertex; // ON_SubDVertex* vertex
  uint m_parent_sn;
  ComponentIndex m_component_index;
  
  internal SubDVertex(SubD subd, IntPtr ptr_vertex, ComponentIndex ci, Point3d location)
  {
    m_parent = subd;
    m_ptr_vertex = current;
    m_component_index = ci;
    m_parent_sn = m_parent.RuntimeSerialNumber;
    Location = location;
  }
  
  public SubDVertex Next()
  {
    if( m_ptr_next == IntPtr.Zero || m_ptr_vertex == IntPtr.Zero || m_parent==null )
      return SubDVertex.Empty;
    
    if( m_parent_sn != m_parent.RuntimeSerialNumber )
    {
      // fix up vertex pointer based on ComponentIndex
    }
    ComponentIndex next_ci = new ComponentIndex();
    Point3d location = new Point3d();
    IntPtr next = UnsafeNativeMethods.ON_SubDVertex_GetNext(m_ptr_vertex, ref next_ci, ref location);
    if( next == IntPtr.Zero )
      return SubDVertexNode.Empty;
    return new SubDVertex(m_parent, next, next_ci);
  }
  
  public Point3d Location
  {
    get; private set; // note that set is not public
  }
}


class SubDVertexList
{
  SubD m_parent;
  
  public SubDVertex UpdateVertex( SubDVertex vertex, Point3d newLocation )
  {
    // perform some validaton, make m_parent non-const, update location
    // return SubDVertex with new location data
  }
  
}