关于extrude与extrudeAlongPath的问题（附程序）

黄玮

我想把一个圆沿一跟直线拉生成圆柱，用extrude可以实现，但是用extrudeAlongPath这个函数却出现问题？这是怎么回事？大家帮忙看看，先谢谢大家。

AcDbBlockTable *pThisBlockTable;
 acdbHostApplicationServices()->workingDatabase()->getSymbolTable(pThisBlockTable,
  AcDb::kForWrite);
 AcDbBlockTableRecord *pOtherBtr;
 pThisBlockTable->getAt(ACDB_MODEL_SPACE,pOtherBtr,AcDb::kForWrite);
 pThisBlockTable->close();

    AcDbCircle *OCircle = new AcDbCircle(AcGePoint3d(0,0,0),AcGeVector3d(1,0,0),80);
 AcDbLine *line = new AcDbLine(AcGePoint3d(0,0,0),AcGePoint3d(100,0,0));
 AcDb3dSolid *OSolid = new AcDb3dSolid();
 AcDbObjectId OSolidId,liId;

 pOtherBtr->appendAcDbEntity(liId,line);
 AcDbVoidPtrArray OArr,OgnArr;
 OArr.append(OCircle);
 OCircle->close();

 int i;
 if (AcDbRegion::createFromCurves(OArr,OgnArr)!=Acad::eOk)  
 {
  for (i=0;i<OgnArr.length();i++) 
   delete OgnArr;
  return;
 }
 AcDbRegion *oRegion;
 oRegion=AcDbRegion::cast((AcRxObject*)OgnArr[0]);

 OSolid->extrudeAlongPath(oRegion,line);
// OSolid->extrude(oRegion,100,0);
    pOtherBtr->appendAcDbEntity(OSolidId,OSolid);
 line->close();
 OSolid->close();
 pOtherBtr->close();