[每日一码] AcDbPolyline和AcGeCurve2d互转函数
static void convertPolylineToGeCurve(AcDbPolyline* pPoly, AcGeCurve2d*& out采用pGeCurve){
AcGeVoidPointerArray geCurves;
AcGeVector3d normal = pPoly->normal();
// Is the polyline closed or open
int nSegs = -1;
if (pPoly->isClosed())
nSegs = pPoly->numVerts();
else
nSegs = pPoly->numVerts() - 1;
for (int i = 0; i < nSegs; i++)
{
if (pPoly->segType(i) == AcDbPolyline::kLine)
{
AcGeLineSeg2d line;
pPoly->getLineSegAt(i, line);
AcGeLineSeg2d *pLine = new AcGeLineSeg2d(line);
geCurves.append(pLine);
}
else if (pPoly->segType(i) == AcDbPolyline::kArc)
{
AcGeCircArc2d arc;
pPoly->getArcSegAt(i, arc);
AcGeCircArc2d *pArc = new AcGeCircArc2d(arc);
geCurves.append(pArc);
}
}// for
if (geCurves.length() == 1)
out采用pGeCurve = (AcGeCurve2d*)(geCurves);
else
out采用pGeCurve = new AcGeCompositeCurve2d(geCurves);
} // End of convertPolylineToGeCurve()
//------------------------------------------------------------------------
static void convertGeCurveToPolyline(AcGeCurve2d* pCurve, AcDbPolyline*& pResultPoly)
{
AcGeVoidPointerArray resultCurves;
AcGeCompositeCurve2d* pResultCurve;
if (pCurve->isKindOf(AcGe::kCompositeCrv2d))
{
pResultCurve = (AcGeCompositeCurve2d*)pCurve;
pResultCurve->getCurveList(resultCurves);
}
else
resultCurves.append(pCurve);
int nCurves = resultCurves.length();
pResultPoly = new AcDbPolyline(nCurves);
AcGeCurve2d *pThisCurve = NULL;
int i = 0;
for (i = 0; i < nCurves; i++)
{
pThisCurve = (AcGeCurve2d*)(resultCurves<i>);
if (pThisCurve->isKindOf(AcGe::kCircArc2d))
{
AcGeCircArc2d *pArc = (AcGeCircArc2d*)pThisCurve;
double ang = 0.25 * (pArc->endAng() - pArc->startAng());
double bulge = tan(ang);
if (pArc->isClockWise())
bulge = -bulge;
pResultPoly->addVertexAt(i, pArc->startPoint(), bulge);
}
else if (pThisCurve->isKindOf(AcGe::kLineSeg2d))
{
AcGeLineSeg2d *pLine = (AcGeLineSeg2d*)pThisCurve;
pResultPoly->addVertexAt(i, pLine->startPoint(), 0);
}
}// for
AcGePoint2d endPt;
if (pThisCurve->hasEndPoint(endPt))
pResultPoly->addVertexAt(i, endPt, 0);
} // End of convertGeCurveToPolyline()
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