[vtkusers] Using GetBounds() for 2-D vtkPolyData

[Wei Woo]

Dear friend,
                  Thank u very much for your reply.I have got the following function in my code.

  /*******************************************************************************************************
  static void sliceStartPoint(vtkPolyData *pData,double sBoundary[3])
  {
  double bounds[6] = {0.0,-1.0,0.0,-1.0,0.0,-1.0};
  double stPoints[3] = {-1.0,-1.0,-1.0};
  pData->GetBounds(bounds);
  stPoints[0] = bounds[1];   
  stPoints[1] = (bounds[2]+bounds[3])/2;
  stPoints[2] = (bounds[4]+bounds[5])/2;
  .
  .
  .
  }
  ********************************************************************************************************/
  Compilation in Microsoft Visual C++ is ok.But while running the program I see the following error:
   
    vtkDataObject : Error: expression cannot be evaluated
    CellData:Expression cannot be evaluated
    PointData:Expression cannot be evaluated
   
  My polydata is of zero thickness along y direction and along x-z direction.I cannot solve the problem.It would be great if someone give me any idea.
   
  regards,
  Wei.
  
Dominik Szczerba <domi at vision.ee.ethz.ch> wrote:
    You didnt tell us what the problem is. If you force me to gues
  s I say you need 
to check the bounds, and, if equal in some dimension, separate them by a 
small delta.
Dominik

On Saturday 21 April 2007 09:51, Wei Woo wrote:

> Dear friends,
> After slicing, my poly data has become aligned with x-z
> axes.It is just a slice i,e, it does not have any thickness in
> y-direction.When I am using GetBounds() method on that 2-D data I am always
> getting problem in running the program whereas compilation is Ok.Could any
> one suggest how to solve the problem? regards, Wei.
>
>
> ---------------------------------
> Ahhh...imagining that irresistible "new car" smell?
> Check outnew cars at Yahoo! Autos.

-- 
Dominik Szczerba, PhD
Computer Vision Lab CH-8092 Zurich
http://www.vision.ee.ethz.ch/~domi
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---------------------------------
Ahhh...imagining that irresistible "new car" smell?
 Check outnew cars at Yahoo! Autos.
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