using Autodesk.AutoCAD.ApplicationServices;
using Autodesk.AutoCAD.DatabaseServices;
using Autodesk.AutoCAD.EditorInput;
using Autodesk.AutoCAD.Geometry;
using Autodesk.AutoCAD.Runtime;
using System;
namespace electricalPlugin
{
public class test : IExtensionApplication
{
[CommandMethod("test")]
public void Test()
{
Document doc = Autodesk.AutoCAD.ApplicationServices.Core.Application.DocumentManager.MdiActiveDocument;
if (doc == null) return;
Database db = doc.Database;
Editor ed = doc.Editor;
TypedValue[] tv = new TypedValue[1];
tv.SetValue(new TypedValue((int)DxfCode.Start, "HATCH"), 0);
SelectionFilter sf = new SelectionFilter(tv);
PromptSelectionResult psr = ed.GetSelection(sf);
if (psr.Status != PromptStatus.OK) return;
using (Transaction tr = db.TransactionManager.StartTransaction())
{
foreach (ObjectId id in psr.Value.GetObjectIds())
{
if (id.ObjectClass.IsDerivedFrom(RXObject.GetClass(typeof(Hatch))))
{
Hatch ent = tr.GetObject(id, OpenMode.ForRead) as Hatch;
double area = GetHatchArea(ent);
ed.WriteMessage("\nArea[{0}]={1}",id,area);
}
}
tr.Commit();
}
}
double GetHatchArea(Hatch pHatch)
{
double area = 0;
try
{
area = pHatch.Area;
} catch
{
int nLoop = pHatch.NumberOfLoops;
int loopType;
for (int i = 0; i < nLoop; i++)
{
double looparea = 0;
loopType = (int)pHatch.LoopTypeAt(i);
if ((loopType & (int)HatchLoopTypes.Polyline) > 0)
{
HatchLoop hatchLoop = pHatch.GetLoopAt(i);
BulgeVertexCollection bulgeVertex = hatchLoop.Polyline;
using (Polyline pPoly = new Polyline(bulgeVertex.Count))
{
for (int j = 0; j < bulgeVertex.Count; j++)
{
pPoly.AddVertexAt(j, bulgeVertex[j].Vertex, bulgeVertex[j].Bulge, 0, 0);
}
pPoly.Closed = (loopType & (int)HatchLoopTypes.NotClosed) == 0;
looparea = pPoly.Area;
if ((loopType & (int)HatchLoopTypes.External) > 0)
area += Math.Abs(looparea);
else
area -= Math.Abs(looparea);
}
} else
{
HatchLoop hatchLoop = pHatch.GetLoopAt(i);
Curve2d[] cur2ds = new Curve2d[hatchLoop.Curves.Count];
hatchLoop.Curves.CopyTo(cur2ds, 0);
using (CompositeCurve2d compCurve = new CompositeCurve2d(cur2ds))
{
Interval interval = compCurve.GetInterval();
double dMin = interval.GetBounds()[0], dMax = interval.GetBounds()[1];
if (Math.Abs(dMax - dMin) > 1e-6)
{
try
{
looparea = compCurve.GetArea(dMin, dMax);
if ((loopType & (int)HatchLoopTypes.External) > 0)
area += Math.Abs(looparea);
else
area -= Math.Abs(looparea);
}
catch
{
// Разбиваем кривую на 1000000 точек. Надеюсь, что такой точности
// будет достаточно.
Point2d[] pts = compCurve.GetSamplePoints((int)1e+6);
int np = pts.Length;
for (int j = 0; j < np; j++)
{
looparea += 0.5 * pts[j].X * (pts[(j + 1) % np].Y - pts[(j + np - 1) % np].Y);
}
if ((loopType & (int)HatchLoopTypes.External) > 0)
area += Math.Abs(looparea);
else
area -= Math.Abs(looparea);
}
}
}
}
}
}
return Math.Abs(area);
}
public void Initialize()
{
}
public void Terminate()
{
}
}
}
