public static EditResult Cut(CadObjectDB db, CadFigure fig, int sp)
{
EditResult result = new EditResult();
if (fig.Type != CadFigure.Types.POLY_LINES)
{
return(result);
}
if (fig.IsLoop)
{
return(result);
}
int pcnt = fig.PointCount;
int headNum = sp + 1;
int tailNum = pcnt - sp;
CadFigure headFig = null;
CadFigure tailFig = null;
if (headNum <= 1 || tailNum <= 1)
{
return(result);
}
if (headNum >= 2)
{
headFig = db.NewFigure(CadFigure.Types.POLY_LINES);
headFig.AddPoints(fig.PointList, 0, headNum);
}
if (tailNum >= 2)
{
tailFig = db.NewFigure(CadFigure.Types.POLY_LINES);
tailFig.AddPoints(fig.PointList, sp, tailNum);
}
if (headFig != null)
{
result.AddList.Add(new EditResult.Item(fig.LayerID, headFig));
}
if (tailFig != null)
{
result.AddList.Add(new EditResult.Item(fig.LayerID, tailFig));
}
result.RemoveList.Add(new EditResult.Item(fig.LayerID, fig));
return(result);
}
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);
}