Associate existing AcdbHatch and AcdbPolyline

[421232206]

as it is known, when I draw a AcdbHatch using the "Hatch" command, I can choose the "associate" checkbox , and the hatch will change when the border changes(the border maybe AcdbPolyline or AcdbMpolygon).

but in some special cases, I need to associate existing Hatches and their borders(the borders are eactly the same with the Hatch),

can any one give me some code about this?

[Alexander.Rivilis]

From ObjectARX SDK Docs:

    // [...]
    pHatch->setAssociative(Adesk::kTrue); 
    // [...]
    // Attach hatchId to all source boundary objects for notification.
    //
    AcDbEntity *pEnt;
    int numObjs = dbObjIds.length();
    Acad::ErrorStatus es;
    for (i = 0; i < numObjs; i++) {
        es = acdbOpenAcDbEntity(pEnt, dbObjIds[i], AcDb::kForWrite);
        if (es == Acad::eOk) {
            pEnt->addPersistentReactor(hatchId);
            pEnt->close();
        }
    }

 dbObjIds contain all AcDbObjectId's of boundary, hatchId is AcDbObjectId of AcDbHatch.

[421232206]

thank you, I know this example code from SDK, but in the SDK code,  the "dbObjIds" is from

pHatch->getAssocObjIds(dbObjIds);

in my case, the hatch has althread been constructed without association with its boundary ojbects, so I can't get "dbObjIds" from the constructed hatch.  I am quite curious that there is no method like setAssocObjIds().

[Alexander.Rivilis]

---

@cnngtdly wrote:

[...]I am quite curious that there is no method like setAssocObjIds().[...]

---

But there is a method AcDbHatch::insertLoopAt() which set objectid array of boundary entities.

[421232206]

I am afraid you misunderstood my meaning.

The Hatch has already been constructed and closed. It has already had loops the same shape with the boundary polylines.  What I want to know is How to assoicate an existing Hatch(which has alread had loops) with other boundary objects;