Dennis,
As you have a pointer to AcDbObject you need to downcast the pointer to have
access to AcDbLine specific functions.
----------------------------------------------------------------------------
--------------
// First you need to cast the pointer.
// Note that as we know that AcDbLine derives from AcDbObject this cast must
work
AcDbLine* pLine = AcDbLine::cast(pObj); // Safe cast. Don't use pLine =
(AcDbLine*)pObj
// Check if cast was successful
if (pLine != NULL) {
pLine->setStartPoint(StartingLine);
pLine->setEndPoint(EndingLine);
}
// Now, as pLine and pObj points to the same thing, you just need to close
one of them, in this case pObj.
// Don't close pLine!
pObj->close();
----------------------------------------------------------------------------
--------------
Also I would recommend you to check if acdbOpenObject() was succeeded
checking its return value:
if (acdbOpenObject(...) == Acad::eOk) {
// Do all the rest inside this statement
}
Regards,
Fernando.
"Dennis Meier" wrote in message
news:E5A8827AE7A4C7412776AE1E5E58DB86@in.WebX.maYIadrTaRb...
> Hello there,
>
> Im an ARX beginner (Charles McAuley : Programming Autocad 2000 / Chapter
3).
> For exercise I translate my old ADS-Applications into ARX.
>
> I have the Problem to get the position Informations (DXF Code 10 and 11)
> of a Line Entitiy without resultbuffers.
> I think the answer is simple but i dont get it.
>
>
> ads_point pt;
> ads_name en;
> acedEntSel("\nSelect an Line Entity: ",en,pt); // ! Snip Error checking
ONLY
> LINES !
>
> AcGePoint3d StartingLine; // for getting the startpoint of the Line
> AcGePoint3d EndingLine; // for getting the endpoint of the Line
>
>
> AcDbObjectId objId; // def Object Id
> acdbGetObjectId(objId,en); // get Objext Id
> AcDbObject *pObj; // Pointer of type AcDbObject
> acdbOpenObject(pObj, objId, AcDb ::kForRead);
>
> ???????? HOW CAN I assign
> the points: StartingLine and Endingline now
> ??????????
>
> pObj->Close
>
> Thank you for helping a newbie
> Dennis
>
>
>
>
>
>
