[IGSTK-Users] Segmentation Fault when Adding and Removing objects

[Sandnes Torleif]

Hi Vincent. I got this reply from Matt Turek. After making the changes he proposed, the adding/removing problem went away.

Torleif

-----Original Message-----
From: Matt Turek [mailto:matt.turek at kitware.com]
Sent: Thu 11/29/2007 9:44 PM
To: Sandnes Torleif
Cc: Andinet Enquobahrie
Subject: Re: [IGSTK-Developers] Problem adding and removing MeshObjectRepresentation to ViewNew3D
 

Torleif,

Would you try changing the following lines in igstkObjectRepresentation

from:

/** Add an actor to the actors list */
void ObjectRepresentation::AddActor( vtkProp * actor )
{
  // Initialize objects as invisible until we learn from their Transform 
time stamp.
  actor->VisibilityOff();
  m_Actors.push_back( actor );
}

to:

/** Add an actor to the actors list */
void ObjectRepresentation::AddActor( vtkProp * actor )
{
  // Initialize objects as invisible until we learn from their Transform 
time stamp.
  actor->VisibilityOn(); // <-- HERE
  m_Actors.push_back( actor );
}

This change will help us understand if there's an issue related to the 
visibility state machine in the object representation.

Thanks,
Matt


Torleif Sandnes wrote:
> Hi.
>
> I have tried to use igstk::MeshObjectRepresentation in my application, 
> but I have encountered some problems using it:
>
> 1. I first load the meshobject and set up the representation. In a 
> separate operation initiated by the user, I add the representation to 
> the view. It seems I have to do the add operation twice to show the 
> loaded mesh.
>
> 2. When I remove the meshobject from the view, I cannot add it back to 
> the view no matter how many times I perform RequestAddObject on the View.
>
> Can anybody explain why this happens?
> Am I doing something wrong, or does the problem lie in the mesh 
> representation object?
>
> I have attached a minimal example that shows the behaviour I describe.
> Note that this example is built against a slightly old version of the 
> sandbox.
>
> Regards
>
> Torleif Sandnes
>
> ------------------------------------------------------------------------
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