public static EditResult CutSegment(CadObjectDB db, MarkSegment seg, Vector3d p)
{
EditResult result = new EditResult();
if (seg.Figure.Type != CadFigure.Types.POLY_LINES)
{
return(result);
}
CrossInfo ci = CadMath.PerpendicularCrossSeg(seg.pA.vector, seg.pB.vector, p);
if (!ci.IsCross)
{
return(result);
}
CadFigure org = db.GetFigure(seg.FigureID);
int a = Math.Min(seg.PtIndexA, seg.PtIndexB);
int b = Math.Max(seg.PtIndexA, seg.PtIndexB);
CadFigure fa = db.NewFigure(CadFigure.Types.POLY_LINES);
CadFigure fb = db.NewFigure(CadFigure.Types.POLY_LINES);
fa.AddPoints(org.PointList, 0, a + 1);
fa.AddPoint(new CadVertex(ci.CrossPoint));
fb.AddPoint(new CadVertex(ci.CrossPoint));
fb.AddPoints(org.PointList, b);
if (org.IsLoop)
{
fb.AddPoint(fa.GetPointAt(0));
}
result.AddList.Add(new EditResult.Item(seg.LayerID, fa));
result.AddList.Add(new EditResult.Item(seg.LayerID, fb));
result.RemoveList.Add(new EditResult.Item(org.LayerID, org));
return(result);
}