[vtkusers] Problem getting correct results with vtkProjectedTerrainPath

[Michael Jackson]

MY guess on this one is that the vtkProjectedTerrainPath is using the  
original (non-scaled) DEM data where as the image data is being warped  
to 10% of the original height, in other words, you are really working  
from 2 different data sets: a scaled and the original.

You need to somehow pass the scaled (warped) data to the  
vtkProjectedTerrainPath filter. If this is not possible you may want  
to consider actually scaling the data yourself to 10% of its value. In  
C++ I would get the pointer to the 0 index, and then multiply the z  
value by 0.10. This probably isn't a "best practice" method but would  
solve the problem.
_________________________________________________________
Mike Jackson                  mike.jackson at bluequartz.net
BlueQuartz Software                    www.bluequartz.net
Principal Software Engineer                  Dayton, Ohio

On Nov 9, 2008, at 4:09 PM, Elvis Dowson wrote:

> Hi,
>         If I set the vtkWrapScalar scale factor to 1, then I see  
> that the projected terrain path closely follows the 3D terrain.  
> However, the image data is greatly exaggerated.
>
> <Problem with vtkProjectedTerrainPath 02.jpg>
>
> How can I get vtkProjectedPath to follow the reconstructed terrain  
> created with a wrap scaler factor of 0.1?
>
> Best regards,
>
> Elvis Dowson