[求助]：extrude与extrudeAlongPath的差别。（附程序）

黄玮

已知一条直线可以得到他的距离，一个以这根直线的一个端点为圆心的圆，用extrude可以拉生得到圆柱，为什么用extrudeAlongPath来生成就会出现：未处理的异常？ 单步运行的时候就是在//OSolid->extrudeAlongPath(oRegion,line);这一句时问题就出现了。不知道这是怎么回事？
程序如下：
AcDbBlockTable *pThisBlockTable;
acdbHostApplicationServices()->workingDatabase()->getSymbolTable(pThisBlockTable,AcDb::kForWrite);
AcDbBlockTableRecord *pOtherBtr;
pThisBlockTable->getAt(ACDB_MODEL_SPACE,pOtherBtr,AcDb::kForWrite);
pThisBlockTable->close();

AcDbCircle *OCircle = new AcDbCircle(AcGePoint3(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;

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();

luk1114

我以前也遇到这个问题
改成这样应该就可以了
AcDbVoidPtrArray OArr,OgnArr;
OArr.append(OCircle);
OgnArr.setPhysicalLength(1);
Acad::ErrorStatus eError = AcDbRegion::createFromCurves(circ,regions);
AcDbRegion *oRegion=AcDbRegion::cast((AcRxObject*)OgnArr[0]);

黄玮

luk1114 :      Acad::ErrorStatus eError = AcDbRegion::createFromCurves(circ,regions);   中的circ,regions是不是就是OArr,OgnArr？但是我这样改了，还是出现那样的错误啊。

luk1114

AcDbCircle *OCircle = new AcDbCircle(AcGePoint3d(0,0,0),AcGeVector3d(1,0,0),80);       

        AcDbVoidPtrArray OArr,OgnArr;
        OArr.append(OCircle);        
        OgnArr.setPhysicalLength(1);
        Acad::ErrorStatus eError = AcDbRegion::createFromCurves(OArr,OgnArr);
        AcDbRegion *oRegion=AcDbRegion::cast((AcRxObject*)OgnArr[0]);

        AcDbLine *line = new AcDbLine(AcGePoint3d(0,0,0),AcGePoint3d(100,0,0));
        AcDbObjectId id_line;
        postToDatabase1(line,id_line);

        AcDb3dSolid *OSolid = new AcDb3dSolid();
        AcDbObjectId OSolidId;
        eError=OSolid->extrudeAlongPath(oRegion,line);
        postToDatabase1(OSolid,OSolidId);

        AcDbEntity* pEntity = NULL;
        Acad::ErrorStatus err = acdbOpenObject(pEntity, id_line, AcDb::kForWrite);
        pEntity->erase();
        pEntity->close();
       
       
        delete OCircle;



Acad::ErrorStatus
postToDatabase1(/*[in]*/AcDbEntity* pEnt,/*[out]*/AcDbObjectId& idObj)
//Purpose:
//  Adds an entity to the MODEL_SPACE of the CURRENT database.
//Note:
//  It could be generalized to add it to any block table record of
//  any database, but why complicate it...
//
{
        Acad::ErrorStatus          es;
        AcDbBlockTable*                pBlockTable;
        AcDbBlockTableRecord*  pSpaceRecord;
        if (acdbHostApplicationServices()->workingDatabase()==NULL)
                return Acad::eNoDatabase;
        //Get a pointer to the current drawing
        //and get the drawing's block table.  Open it for read.
        if ((es = acdbHostApplicationServices()->workingDatabase()->getBlockTable(pBlockTable, AcDb::kForRead))==Acad::eOk){
                //Get the Model Space record and open it for write.  This will be the owner of the new line.
                if ((es = pBlockTable->getAt(ACDB_MODEL_SPACE, pSpaceRecord, AcDb::kForWrite))==Acad::eOk){
                        //Append pEnt to Model Space, then close it and the Model Space record.
                        if ((es = pSpaceRecord->appendAcDbEntity(idObj, pEnt))==Acad::eOk)
                                pEnt->close();
                        pSpaceRecord->close();
                }
                pBlockTable->close();
        }
        //it is good programming practice to return an error status
        return es;
}

黄玮

现在可以了，谢谢luk1114