Occasionally FlipNormal fails...

[oransen]

Occasionally a call to FlipNormal fails. I've only just added the debugging to see the COM error, but since it does not happen very often I thought I'd ask here.

Why would FlipNormal fail? The workplane is inside a hole on the side of a tube, but there are no constraints associated with it.

Here's the code, though I doubt it'll help...

HRESULT hRes = pWorkPlane->FlipNormal() ;
if (SUCCEEDED(hRes)) {
    return true;

} else {
    ShowCOMError(hRes,L"CCollettore::FFWPNIR(1)of rango %d plane normal flip failed\n"
                 L"plane name = <%s>",ikCollRangoNum,csPlaneName.GetString());
    return false;
}

[Hochenauer]

I checked the implementation of FlipNormal. We block flippig the normal for

- Grounded

- Origin

- Fixed

workplanes.

Does this explain why you might see a failure there?

Thanks,

Gerald

[oransen]

I don't think those cases are my cases, but it only happens occasionally and the program is a bit complex. Also I'm working remote so I don't have access to the files which fail.

This is where it happens....

...and I've attached an example part. Of course it does not happen in this example! Sod's Law.

Does looking at the COM return value give me a clue?

All the best

Owen

[Hochenauer]

I can certainly check if you provide the value :o).

[oransen]

I've added more detail into the error message, as soon as it happens again I'll be back with more info!

[oransen]

Revealin my ignorance here, I understand in your list origin and grounded workplanes, but what is a "fixed workplane"?

[Hochenauer]

The DefinitionType property temporarily returns kFixedWorkPlane if a Workplane is below the StopNode. Could this be the case when you see the problem?

[Hochenauer]

If a plane is constructed involving adaptive geometry, it could also result in a kFixedWorkplane DefinitionType.

[oransen]

"If a plane is constructed involving adaptive geometry, it could also result in a kFixedWorkplane DefinitionType."

Ok, thanks. I'm not doing that, but must be doing something else odd...