public override void Undo(CadObjectDB db)
{
CadLayer layer = db.GetLayer(LayerID);
CadFigure fig = db.GetFigure(FigureID);
if (fig == null)
{
return;
}
int idx = PointIndex;
int i = 0;
if (mPointList == null)
{
mPointList = new VertexList();
}
mPointList.Clear();
for (; i < InsertNum; i++)
{
mPointList.Add(fig.GetPointAt(idx + i));
}
fig.RemovePointsRange(idx, InsertNum);
}