public void setVertex(int i, int j, ccVertex3F vertex)
{
CCGrid3D g = (CCGrid3D)m_pTarget.Grid;
g.setVertex(i, j, vertex);
}
/// <summary>
/// sets a new vertex to a certain position of the grid
/// </summary>
public void setVertex(ccGridSize pos, ccVertex3F vertex)
{
CCGrid3D g = (CCGrid3D)m_pTarget.Grid;
g.setVertex(pos, vertex);
}