[ARX函数]：关于AcGeCurveCurveInt2d类的使用

namehql

哪位老大用过这个类?看帮助将可以用于计算两条曲线的交点,我试了以下,但老是出错,提示对只读要素进行了操作,不知什么原因?

ymd

AcGeVoidPointerArray geCurves1,geCurves2;
        AcGeCurve3d *pGeCurve1,*pGeCurve2;
        int i;
        AcGeCompositeCurve2d *pComp1 = new AcGeCompositeCurve2d();
        AcGeCompositeCurve2d *pComp2 = new AcGeCompositeCurve2d();

        xytoGeCurve(x1,y1,n1,pGeCurve1);//将数据或AcDb曲线转换为AcGeCurve3d曲线
        xytoGeCurve(x2,y2,n2,pGeCurve2);//将数据或AcDb曲线转换为AcGeCurve3d曲线
        geCurves1.append(pGeCurve1);
        geCurves2.append(pGeCurve2);
        pComp1->setCurveList(geCurves1);
        pComp2->setCurveList(geCurves2);
        AcGeCurveCurveInt2d cci(*pComp1,*pComp2);
        AcGeInterval ival;
        double low1, upper1;
        double low2, upper2;
        AcGePoint2d p1,p2;
        cci.curve1()->getInterval(ival);
        ival.getBounds(low1, upper1);
        cci.curve2()->getInterval(ival);
        ival.getBounds(low2, upper2);
        int nCross = cci.overlapCount();//重迭段
        AcGeTol  tol;

        int j=0,n=cci.numIntPoints();//交点数
       ......
       .......

namehql

楼上的老大,能帮忙看看这段程序有什么问题吗?
ads_name ent;
        ads_point pt;
        AcGePoint2dArray ptarray1,ptarray2;       
        AcGeCurveCurveInt2d curint;
        AcGePoint2d jdd;
        AcGeTol tol;
        tol.setEqualPoint(1);
       
//        AcGePolyline2d pl2d;
        if(acedEntSel("\n选择实体：",ent,pt)!=RTNORM)
                return;
        GetPtA(ent,ptarray1);
        //AcGePolyline2d pl2d(ptarray1);
        AcGePolyline2d pl2d(ptarray1);
//        int tt=pl2d.numFitPoints();
        curint.set(pl2d,pl2d,tol);
        AcGeInterval ival;
        double low1, upper1;
        double low2, upper2;
        AcGePoint2d p1,p2;
        curint.curve1()->getInterval(ival);
        ival.getBounds(low1, upper1);
        curint.curve2()->getInterval(ival);
        ival.getBounds(low2, upper2);
        int nCross = curint.overlapCount();//重迭段
//        AcGeTol tol;
       
        int j=0,n=curint.numIntPoints();//交点数