Hi Cory, Thanks for the answer and the workaround, will go this way.
Cheers, Sergey On Mon, Jan 30, 2017 at 4:18 PM, Cory Quammen <cory.quam...@kitware.com> wrote: > Hi Sergey, > > I'm not aware of another writer that has the behavior you describe of > saving out specified data arrays. As a result, there isn't any > existing code to select the data arrays to be saved. There are a > number of readers that do support which arrays to load, but it's not > really possible to reuse that infrastructure without some additional > ParaView development work to support selecting arrays to be written. > > A workaround would be to use a Pass Data Arrays filter to select the > data arrays, then save the Pass Data Arrays output to your custom > writer. > > Hope that helps, > Cory > > On Mon, Jan 30, 2017 at 5:00 AM, Sergey Alexandrov > <alexandro...@gmail.com> wrote: > > Hi, > > > > I am trying to implement a sink algorithm (writer) to output point > clouds in > > my custom format. The points may have multiple data > > arrays, and the writer should provide the user with an option to select > > which of these arrays are to be output. > > > > Unfortunately, I am not able to find any wiki pages or articles that > explain > > how to implement such a writer. Also, I do not find any > > existing writers with this functionality. The most similar things I found > > are: > > > > 1) AMR base particles reader. It provides a facility to select which data > > arrays are to be read from a file. Basically, when the user > > sets the filename, the reader loads the meta-information about available > > arrays from the file, and then these are displayed in > > ParaView properties panel. The user can tick the arrays he wants and > press > > "Apply" to read. I can not figure out how to apply this > > in my writer, because the only extension point for writers is the > > WriteData() function. It is called after the user has pressed the > > "Save" button, which is too late. In fact, I want to "inject" some code > > between the moment the user chose the output filename (and > > hence the writer to use), and the moment a dialog window with the > properties > > of the writer is shown. > > > > 2) Wiki page on writing readers. There is an example how make a drop-down > > list to select which input array to process. Perhaps > > I could add this to the writer, however it does seem to support only a > > single array choice, whereas I need multiple. > > > > I would be very grateful for suggestions on how to implement the > > functionality I need. Examples of existing readers would be > > great. Or if there is definitely no "official" clean way to implement > this, > > please also let me know. > > > > Cheers, > > Sergey > > > > _______________________________________________ > > Powered by www.kitware.com > > > > Visit other Kitware open-source projects at > > http://www.kitware.com/opensource/opensource.html > > > > Please keep messages on-topic and check the ParaView Wiki at: > > http://paraview.org/Wiki/ParaView > > > > Search the list archives at: http://markmail.org/search/?q=ParaView > > > > Follow this link to subscribe/unsubscribe: > > http://public.kitware.com/mailman/listinfo/paraview > > > > > > -- > Cory Quammen > Staff R&D Engineer > Kitware, Inc. >
_______________________________________________ Powered by www.kitware.com Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html Please keep messages on-topic and check the ParaView Wiki at: http://paraview.org/Wiki/ParaView Search the list archives at: http://markmail.org/search/?q=ParaView Follow this link to subscribe/unsubscribe: http://public.kitware.com/mailman/listinfo/paraview