[vtkusers] tracing the execution of vtkContourFilter

[Sebastien MARAUX]

Do you really put a breakpoint in a .h file ?
Shouldn't you put it in the cxx file instead ?

You could set debug on for contour filter
and export output of vtk to a file (see
archive of messages, I posted a question
about that 1 month ago), then browse
the output.

The problem is that you probably use a dll,
and you cannot trace through this dll, as you
don't have its source.

If you really want to go deap inside code,
add vtkContourFilter.cxx to your code,
suppress the export statement and
rename the class to another name
(myContourFilter ?) in the .h and .cxx (change class::,
constructor and destructor) to avoid conflicts,
and compile it with your code, use myContourFilter,
put breakpoints in it, to see what it does.

There is probably some cleverer things to do,
but I am not really what one would call a C++
expert at this time.

Good luck

Seb
----- Original Message -----
From: "vtk replies" <vtk_replies at yahoo.com>
To: <vtkusers at public.kitware.com>
Sent: Thursday, January 16, 2003 1:56 AM
Subject: [vtkusers] tracing the execution of vtkContourFilter


> Hello,
> I am interested in finding out how vtkContourFilter
> works. I want to trace and step into every call that
> is made to methods from other classes during the
> execution of this filter.
>
> This is what I tried doing:
>
>  I used the example Vol.cxx (in graphics/examplesCxx
> directory of vtk). It is a simple program with the
> following steps
>
> --create renderer, renderwindow & other things
> necessary to render a scene
> --create contour filter
> --set input of contour filter to some structured
> points data file
> --call the Render() method of renderwindow to render
> scene.
>
> ============
> PROBLEMS
> ============
> (1) When I set a break point at the Execute() method
> in vtkContourFilter.H , the method did not seem to get
> called at all during execution.
> (2) when I set a break point in the Render() method in
> the main program file (Vol.cxx), the path of execution
> is not tracable either.
>
> what am I doing wrong/ stupid ?
>
> ===============
> HELP !!!!
> ===============
> Will anyone who knows a solution to my problem please
> guide me ?
>
> what exactly should I do to see the step by step
> execution of vtkContourFilter, including being able to
> step into the methods that it calls from other classes
> ?
>
> Thanks in advance for any help.
>
> Regards,
> Subha.
>
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