private static double DrawOffset(int N1, int N2, double dist, bool boo)
{
double rez = 0;
using (Transaction transaction = _db.TransactionManager.StartTransaction())
{
BlockTable blockTable = transaction.GetObject(_db.BlockTableId, OpenMode.ForRead) as BlockTable;
// Open the Block table record Model space for write
BlockTableRecord modelSpace = transaction.GetObject(blockTable[BlockTableRecord.ModelSpace], OpenMode.ForWrite) as BlockTableRecord;
LayerTable layerTable = transaction.GetObject(_db.LayerTableId, OpenMode.ForRead) as LayerTable;
Polyline bpLine = (Polyline)transaction.GetObject(_polylineId, OpenMode.ForWrite);
int off = -1;
Polyline firstPoly = new Polyline();
firstPoly.SetDatabaseDefaults();
#region make poly
ArrayList arrayList = new ArrayList();
for (int j = 1; j <= (bpLine.NumberOfVertices >> 1); j++)
{
if ((N1 + j) > (bpLine.NumberOfVertices - 1))
{
off++;
}
int i = (off < 0) ? (N1 + j) : off;
LineSegment2d seg = bpLine.GetLineSegment2dAt(i);
double bulge;
if ((i - 1) < 0)
{
bulge = bpLine.GetBulgeAt(bpLine.NumberOfVertices - 1);
}
else
{
if ((i - 1) > bpLine.NumberOfVertices - 1)
{
bulge = bpLine.GetBulgeAt(0);
}
else
{
bulge = -bpLine.GetBulgeAt(i - 1);
}
}
firstPoly.AddVertexAt(0, new Point2d(seg.StartPoint.X, seg.StartPoint.Y), bulge, 0, 0);
arrayList.Add(bpLine.GetBulgeAt(i));
}
modelSpace.AppendEntity(firstPoly);
transaction.AddNewlyCreatedDBObject(firstPoly, true);
#endregion
#region coating
if (boo)
{
LineSegment2d seg1 = firstPoly.GetLineSegment2dAt(0);
LineSegment2d seg2 = bpLine.GetLineSegment2dAt(N2);
Complex mid = new Complex((seg2.StartPoint.X + seg2.EndPoint.X) / 2, (seg2.StartPoint.Y + seg2.EndPoint.Y) / 2);
Line2d l = new Line2d(new Complex(seg1.StartPoint.X, seg1.StartPoint.Y), new Complex(seg1.EndPoint.X, seg1.EndPoint.Y));
int k = l.PositionOfТhePointToLineSign(mid);
DBObjectCollection oc = firstPoly.GetOffsetCurves((k < 0) ? dist : -dist);
foreach (Entity acEnt in oc)
{
modelSpace.AppendEntity(acEnt);
transaction.AddNewlyCreatedDBObject(acEnt, true);
acEnt.TransformBy(_ed.CurrentUserCoordinateSystem);
try
{
acEnt.Layer = _sheetDescriptionForm.GetCoatingLayer();
}
catch
{
LayerTableRecord acLyrTblRec = transaction.GetObject(_db.Clayer, OpenMode.ForWrite) as LayerTableRecord;
acEnt.Layer = acLyrTblRec.Name;
}
try
{
System.Drawing.Color color = _sheetDescriptionForm.GetCoatingColor();
if (color.Name == "ByLayer")
{
throw new ArgumentNullException();
}
acEnt.Color = Color.FromColor(color);
}
catch
{
//LayerTableRecord acLyrTblRec = acTrans.GetObject(Db.Clayer, OpenMode.ForWrite) as LayerTableRecord;
LayerTableRecord acLyrTblRec = transaction.GetObject(layerTable[acEnt.Layer], OpenMode.ForWrite) as LayerTableRecord;
acEnt.Color = acLyrTblRec.Color;
}
_entityTemp.Add(acEnt);
}
Polyline acPoly11 = oc[0] as Polyline;
}
#endregion
#region calculate length
for (int j = 0; j < firstPoly.NumberOfVertices - 1; j++)
{
if (Math.Abs(firstPoly.GetBulgeAt(j)) != 0.0)
{
CircularArc2d arc = firstPoly.GetArcSegment2dAt(j);
double rad = arc.Radius;
double ang = Math.Abs(Math.Atan(firstPoly.GetBulgeAt(j)));
rez += (4 * ang * rad);
}
else
{
LineSegment2d seg = firstPoly.GetLineSegment2dAt(j);
Complex s = new Complex(seg.StartPoint.X, seg.StartPoint.Y);
Complex e = new Complex(seg.EndPoint.X, seg.EndPoint.Y);
rez += (s - e).abs();
}
}
#endregion
firstPoly.Erase();
transaction.Commit();
}
_ed.Regen();
return(rez);
}
