[求助]：求由AcGePoint3dArray数组生成AcDbRegion的实例!

yusongrong

我找一下论坛上的关于AcDbRegion的例子，写代码如下：
//从AcDbObjectId,创建REGION
AcDbObjectId calculate::CreateRegionFromId(AcDbObjectId polylineID)
{
        // 打开POLYLINE.
        AcDbEntity* pPolyline;
        AcDbObjectId regionId;
        acdbOpenAcDbEntity(pPolyline, polylineID, AcDb::kForRead);

        // 用polyline创建REGION
        AcDbVoidPtrArray polylineArray;
        polylineArray.append((void*)pPolyline);
        AcDbVoidPtrArray regions;
        AcDbRegion::createFromCurves(polylineArray, regions);
        AcDbRegion *pRegion = NULL;
        pRegion = AcDbRegion::cast((AcRxObject*)regions[0]);

        pPolyline->close();

        // 添加REGION到数据库
        AcDbBlockTable* pBlockTable;
        acdbHostApplicationServices()->workingDatabase()->getBlockTable(pBlockTable, AcDb::kForRead);

        AcDbBlockTableRecord* pBlockTableRecord;
        pBlockTable->getAt(ACDB_MODEL_SPACE, pBlockTableRecord, AcDb::kForWrite);
        pBlockTable->close();

                      AcDbRegion* regionObj = AcDbRegion::cast((AcRxObject*)regions[0]);
        pBlockTableRecord->appendAcDbEntity(regionId, regionObj);

        pBlockTableRecord->close();
        regionObj->close();

        // 返回REGION的ID
        return regionId;
}
在选闭合polyline线生成AcDbRegion时，老是在AcDbRegion::createFromCurves(polylineArray, regions);出现CAD崩溃，请问高手？最好给一个实例，谢谢!