Many VTK objects have a ShallowCopy method that does what you want. You can
shallow copy the entire datasets (which just copies pointers to data into a
new dataset container), or selectively copy e.g. points.
Datasets can easily share components. For instance, if you have two grids
that have the same points, you can do something like:
and both grids will share the same vtkPoints object and its associated
On Thu, Dec 1, 2016 at 12:47 PM, Straub, Alexander <
> Good day,
> I am currently developping a bunch of plugins (filters) for Paraview in
> the following setup:
> I have input data as a rectilinear grid, including an array of scalar
> values per cell (volume-of-fluid data (vof)). On this data I now want to
> perform some calculations. First, a plugin calculates the gradient. Then,
> another plugin takes the grid with the vof-data and the gradients to
> calculate other vectors. This goes on for a few plugins.
> The problem I get is that every time another filter is applied onto the
> last one, I copy all the data and add another array with the filter's own
> results. Thus, the second filter stores its own calculation and the source
> data, the third filter stores its own calculation, the calculation of the
> previous plugin and the source data.
> You can see, that this results in a huge increase of memory usage.
> Now to my question: Is there a possibility or method which passes along a
> pointer, or a copy pointing to the input of the plugin to which I then only
> need to add another array? Additionally I might add that the grid itself
> always stays the same, only each filter appends another array.
> I hope you can help me, or at least quickly tell me if it is not possible
> at all.
> Kind regards,
> Alexander Straub
> Powered by www.kitware.com
> Visit other Kitware open-source projects at http://www.kitware.com/
> Please keep messages on-topic and check the ParaView Wiki at:
> Search the list archives at: http://markmail.org/search/?q=ParaView
> Follow this link to subscribe/unsubscribe:
Powered by www.kitware.com
Visit other Kitware open-source projects at
Please keep messages on-topic and check the ParaView Wiki at:
Search the list archives at: http://markmail.org/search/?q=ParaView
Follow this link to subscribe/unsubscribe: