[vtkusers] 3D .raw data density values

[Michael Knopke]

Hi Tony,

I'm not sure if this is alright, so use with care :-)

 

If your dataset is vtkImageData (I guess so) then you can use:

 

vtkImageData->FindPoint(double x[3]); //where x is in worldspace coordinates

 

But this will only find the closest point belonging to your original
dataset. So if you select a point in worldspace that has no direct
association to a point in imagedata, the value is not correct.

Data in between needs to be interpolated. A way to get the interpolated
point at a certain position is to use the vtkProbeFilter with your
imagedata. But the output depends on what interpolation type you choose
(linear/cubic..).

 

Please correct me If I'm wrong.

 

Regards

Michael

 

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