[vtkusers] How to visualise 3d array of data

[hammett]

Thanks for the starting point. It would make more sense to load from a file
from my point of view too. What format should the file be in? Can I simply
have a list of the x,y and z points I wish to generate voxels from? Like
this:

1 5 6
1 6 6
1 7 6
etc..

Also, I couldn't see the vtkThresholdFilter class is the class list.

Thanks so far!

Jeff Baumes wrote:
> 
> Take a look at the documentation for vtkImageData for how to set the 3D
> extents and fill the scalar data with a 0/1 array. You will have to put
> your
> values in a vtkIntArray one by one since there is no way to pass a java
> array pointer directly to an array. It would be more efficient to load
> your
> data directly from disk using a VTK reader so you don't have to do lots of
> looping with Java-wrapped VTK.
> Then look at vtkThresholdFilter for how to threshold this, then you can
> send
> that through vtkGeometryFilter, then vtkPolyDataMapper/vtkActor and into a
> vtkRenderWindow. You could also I suppose use volume rendering on the
> whole
> dataset using an appropriate transfer function, but I'm not an expert in
> that.
> 
> Jeff
> 
> On Thu, Jun 25, 2009 at 10:35 AM, hammett <notlee at gmail.com> wrote:
> 
>>
>> Hi. I have a three-dimensional array, the values of which are either 0 or
>> 1.
>> How can I create a 3D visualisation which shows just the elements in the
>> array which are set to 1 in Java? What I'm trying to do is create voxels
>> from the 3D array. I have looked through the mailing list archive and on
>> the
>> Internet and VTK is quite a lot of information to take in so I haven't
>> managed to work out how to do this.
>>
>> Thanks for any help.
>> --
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