[vtk-developers] The ImageStencil Issue

[dean.inglis at camris.ca]

Hi David,

the fix works, thanks!  Looking forward
to more stencil possibilities.

Dean


> I just committed a fix, so please try again when you have a chance.  The 
> whole reason that the trick of calling SetSpacing() and SetOrigin() on 
> the stencil inputs of a vtkImageFilter works is because it bypasses the 
> pipeline, so converting that bit of code to the new pipeline made it 
> completely nonfunctional.  I just had to set two lines of code back to 
> the way they were.
> 
> This fix will have to be considered "good enough" until stencils are 
> made to use the pipeline properly.
> 
>  - David
> 
> 
> dean.inglis at camris.ca wrote:
> > David,
> >
> > have a look at php bug tracker item  #1452.
> > If I run the tcl script as is, the ROI
> > is not updated correctly.  If I modify the
> > script to delay updating the vtkImageAccumulate
> > and vtkTextActor pipeline until after the
> > first render, things work out (see modified
> > tcl script below).  Prior to executives,
> > the submitted bug script would work.  I believe
> > there is still a pipeline issue here.  Sorry I
> > can't be of much help: I still haven't found time
> > to dive into and figure out executives...
> >
> >   
> >>> The vtkImageStencilSource class requires the Spacing and Origin of 
> >>> whichever image eventually uses the stencil to be propagated the wrong 
> >>> way along the pipeline.  Ouch!
> >>>
> >>>