[MS Connect Edition C++] mdlClip_element() crashes with non persistant element

Herve,

Did you ever come up with a solution to this problem. I am having the same problem.

Christine Joy said:

I am having the same problem

In which version of MicroStation?

Herve Cuzon said:

DgnPlatform::EditElementHandle ehh(DynAccroElmDscrP, false,true);

I find the bools in the ElementHandle constructor hard to remember, and prefer to document them like this...

const bool Owner = true;
const bool IsUnmodified = true;
DgnPlatform::EditElementHandle ehh(DynAccroElmDscrP, !Owner, IsUnmodified);

Herve Cuzon said:

ehh.GetElementDescrP()

A comment in the MicroStationAPI tells us: This call should only be used where necessary, and should be avoided in readonly. Use PeekElementDescrCP to see whether this ElementHandle already has an MSElementDescr.

mdlClip_element(InsideElmDynDscrPP, OutElmDynDscrPP,
    ehh.PeekElementDescrCP(), ACTIVEMODEL, clipP.get(), view);

Without seeing your code it's hard to comment further.

MicroStation V10.14.0.109 This is legacy v8i code that we are just trying to get to work in V10. mdlClip_isElemInside works perfectly when the element is a persistent element. It only crashes on elements that have not yet been added to the design file. I will try using EditElementHandle, but I thought Herve said that crashed too.

Christine Joy said:

mdlClip_isElemInside works perfectly when the element is a persistent element. It only crashes on elements that have not yet been added to the design file

As Brien Bastings commented, a persistent element has a DGN model associated with it.  A newly-created element in memory does not have a DGN model assigned. 

One reason for suggesting use of an ElementHandle is that the DGN model can be specified in its constructor, or assigned later.  An ElementHandle with a DGN model reference should behave in the same way as one obtained from a persistent element.

If you're using a raw MSElementDescr then you can assign a DGN model reference to its dgnModelRef member...

MSElementDescrP inputElement = ...
inputElement->h.dgnModelRef = ACTIVEMODEL;

Please post your code for further analysis.

Christine Joy said:

mdlClip_isElemInside works perfectly when the element is a persistent element. It only crashes on elements that have not yet been added to the design file

As Brien Bastings commented, a persistent element has a DGN model associated with it.  A newly-created element in memory does not have a DGN model assigned. 

One reason for suggesting use of an ElementHandle is that the DGN model can be specified in its constructor, or assigned later.  An ElementHandle with a DGN model reference should behave in the same way as one obtained from a persistent element.

If you're using a raw MSElementDescr then you can assign a DGN model reference to its dgnModelRef member...

MSElementDescrP inputElement = ...
inputElement->h.dgnModelRef = ACTIVEMODEL;

Please post your code for further analysis.

Thank you Jon!

inputElement->h.dgnModelRef = ACTIVEMODEL; Fixed my problem