代码

多段线带弧形宽度闭合效果

	assertReadEnabled () ;

	AcGePoint2d p1(0,0);
	AcGePoint2d p2(10,0);
	AcGePoint2d p3(10,10);
	AcGePoint2d p4(0,10);
	AcGePoint2d p1x(0,1);
	AcGePoint2d p2x(9,1);
	AcGePoint2d p3x(9,9);
	AcGePoint2d p4x(0,9);
	AcArray <AcGeCurve2d*>edgs;
	AcGeLineSeg2d line1(p1,p2);
	AcGeLineSeg2d line2(p2,p3);
	AcGeLineSeg2d line3(p3,p4);
	AcGeLineSeg2d line4(p1,p1x);
	AcGeCircArc2d cir(p4,p1,1.0,Adesk::kFalse);
	AcGeLineSeg2d line1x(p1x,p2x);
	AcGeLineSeg2d line2x(p2x,p3x);
	AcGeLineSeg2d line3x(p3x,p4x);
	AcGeLineSeg2d line4x(p1x,p1);
	AcGeCircArc2d cirx(p4x,p1x,1.0,Adesk::kFalse);
	edgs.append(&line4x);
	edgs.append(&line1);
	edgs.append(&line2);
	edgs.append(&line3);
	edgs.append(&cir);
	edgs.append(&line4);
	edgs.append(&line1x);
	edgs.append(&line2x);
	edgs.append(&line3x);
	edgs.append(&cirx); 
	mode->geometry().edge(edgs);
	Adesk::Boolean result = Adesk::kFalse; 
	AcArray<AcGeCurve2d*> geCurves;
	double hatchDev = mode->deviation(kAcGiMaxDevForCurve, AcGePoint3d::kOrigin);
	AcGiFill acgiSolidFill;
	acgiSolidFill.setDeviation(hatchDev);
// 	int nSegs = -1;
// 	AcGeLineSeg2d line;
// 	AcGeLineSeg2d *pLine;
// 	nSegs = this->numVerts() ;
// 	for(int i = 0; i < nSegs; i++)
// 	{
// 		if(this->segType(i) == AcDbPolyline::kLine)
// 		{
// 			this->getLineSegAt(i, line);
// 			pLine = new AcGeLineSeg2d(line);
// 			geCurves.append(pLine);
// 
// 		}
// 	}
	mode->subEntityTraits().setColor(1);
	mode->subEntityTraits().setFill(&acgiSolidFill);
	/* geCurves represents boundary of hatch*/
	mode->geometry().edge(edgs);

	return (AcDbEntity::subWorldDraw (mode)) ;

实际效果

左边是线边界框，右边红色是实际效果，模拟闭合（本质上就是假闭合）。