[求助]：用例子的getSubentPathsAtGsMarker无法遍历子实体

wowolwj

今天用arx里的例子遍历region的各个边,发现只能找到一个边,为什么呢?
ads_name sset;
    if (acedSSGet("_:S", NULL, NULL, NULL, sset) != RTNORM) {
        return Acad::eInvalidAdsName;
    }

    struct resbuf *pRb;
    acedSSNameX(&pRb, sset, 0);
    acedSSFree(sset);
    struct resbuf *pTemp;
    int i;
    for (i=1, pTemp = pRb;i<3;i++, pTemp = pTemp->rbnext)
        { ; }
    ads_name ename;
    ads_name_set(pTemp->resval.rlname, ename);

    pTemp = pTemp->rbnext;
    marker = pTemp->resval.rint;
    acutRelRb(pRb);

    acdbGetObjectId(objId, ename);

    AcDbEntity *pEnt;
    acdbOpenAcDbEntity(pEnt, objId, AcDb::kForRead);
     
    AcGePoint3d pickpnt;
    AcGeMatrix3d xform;
    int numIds;
    AcDbFullSubentPath *subentIds;

    pEnt->getSubentPathsAtGsMarker(AcDb::kEdgeSubentType,
        marker, pickpnt, xform, numIds, subentIds);
     for( i = 0; i < numIds; i++) {
         pEnt->highlight(subentIds);

           pEnt->unhighlight(subentIds);

         }
    delete []subentIds;
    pEnt->close();
调试的时候发现numIds的值怎么是1呢?为什么只得到一个边?