Graphics System Changes (ObjectARX)

Changes have been made to the graphics system (GS) which affect drawing objects in a viewport.

Supported platform: Windows only

Supported release(s): AutoCAD 2017 and later

The GS must now be referenced from the GS manager or by getting a message from an event handler, and no longer from the database or the drawable graphics interface. The following methods are obsolete and code statements using them most be updated:

• AcDbDatabase::gsModel()/setGsModel()
• AcGiDrawable::gsNode()/setGsNode()

If your program previously used AcDbDatabase::gsModel(), update your code to use the GS manager. The following code sample gets the GS model using the GS manager:

AcDbHostApplicationServices * pHAS = ::acdbHostApplicationServices();
AcadInternalServices *pAIS = pHAS->acadInternalServices();
AcGsManager* pMgr = pAIS ? pAIS->getAcGsManager() : nullptr;
AcGsModel* pModel = pMgr ? pMgr->gsModel(db) : nullptr;

The hasGsModel of the GS manager returns a Boolean based on if the GS model is not null.

AcGsManager::hasGsModel()

If your program previously used the AcGiDrawable::gsNode() method to update an object, you must now utilize the callback system. The callback system consists of two different message handlers: AcGiDrawableReactor::modified() and AcGiDrawableReactor::erased(). You register or unregister to receive messages about graphics handling with the AcGiDrawableEvent::addReactor and AcGiDrawableEvent::removeReactor() methods.

Note: The AcGiDrawable::gsNode()/setGsNode() methods were originally deprecated in AutoCAD 2015, but the methods have now been completely removed from the API.