[vtkusers] Placing volumes exactly adjacent to each other

[David Gobbi]

On Sun, Sep 11, 2016 at 8:55 AM, David Gobbi <david.gobbi at gmail.com> wrote:

> On Sun, Sep 11, 2016 at 8:17 AM, Elvis Stansvik <
> elvis.stansvik at orexplore.com> wrote:
>>
>>
>> I thought that with e.g. a 2x2x2 volume with spacing 1.0 1.0 1.0, I would
>> get 2x2x2 area occupied when the volume is mapped into the world.
>>
>
> Let's get straight to the point.  In order to seamlessly display two
> adjacent volumes, the volumes must share a face, e.g. the rightmost face of
> the first volume must have the same data points as the leftmost face of
> second volume.  I.e. the data points on the edge must be duplicated between
> the two volumes.
>
> This isn't specific to VTK, or even to volume rendering.  If one is
> analyzing/visualizing a data set in a manner that requires interpolation,
> and the data set needs to be broken into pieces, then adjacent pieces must
> share data points at the edges.
>

 Actually this isn't specific to interpolation.  Any time the
analysis/visualization of the pieces requires any kind of neighborhood
filtering whatsoever, there must be data values shared between adjacent
pieces.

 - David
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