Re: [Paraview] ParaView v5.3: Generating textures from scalars and lookup table
Awesome, glad it worked out! On Sun, May 7, 2017 at 8:32 AM, Nenad Vujicic wrote: > > >> >* Does anyone have idea how to solve generating textures problem? > *> >> >* I continued to decompose the problem and I'm curious, is > interpolation of > *> >* scalars before mapping performed (when OpenGL2 is selected) by shaders > *> >* (on-the-fly, during display) or is an intermediate texture generated? > *> > > > 2xN is a good texture. That is what you should get for both the old and new > > backends (N covers the scalar range, the 2 covers normal versus NaN, it is > > a 2D map because of how normal scalar values should properly interpolate to > > NaN). > > > ... > > Ken, thank you very much for your help. I think I solved my problem of > simulating InterpolateScalarsBeforeMapping (and getting sharp edges) by > re-creating larger colormap (4x1K) from generated one. > > Thanks very much once again to everyone for helping! > > > Nenad. > > > > ___ > 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 > > -- Ken Martin PhD Distinguished Engineer Kitware Inc. 28 Corporate Drive Clifton Park NY 12065 This communication, including all attachments, contains confidential and legally privileged information, and it is intended only for the use of the addressee. Access to this email by anyone else is unauthorized. If you are not the intended recipient, any disclosure, copying, distribution or any action taken in reliance on it is prohibited and may be unlawful. If you received this communication in error please notify us immediately and destroy the original message. Thank you. ___ 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
Re: [Paraview] ParaView v5.3: Generating textures from scalars and lookup table
> >> >* Does anyone have idea how to solve generating textures problem? *> >> >* I continued to decompose the problem and I'm curious, is interpolation of *> >* scalars before mapping performed (when OpenGL2 is selected) by shaders *> >* (on-the-fly, during display) or is an intermediate texture generated? *> > > 2xN is a good texture. That is what you should get for both the old and new > backends (N covers the scalar range, the 2 covers normal versus NaN, it is > a 2D map because of how normal scalar values should properly interpolate to > NaN). > ... Ken, thank you very much for your help. I think I solved my problem of simulating InterpolateScalarsBeforeMapping (and getting sharp edges) by re-creating larger colormap (4x1K) from generated one. Thanks very much once again to everyone for helping! Nenad. ___ 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
Re: [Paraview] ParaView v5.3: Generating textures from scalars and lookup table
> > Does anyone have idea how to solve generating textures problem? > > I continued to decompose the problem and I'm curious, is interpolation of > scalars before mapping performed (when OpenGL2 is selected) by shaders > (on-the-fly, during display) or is an intermediate texture generated? > 2xN is a good texture. That is what you should get for both the old and new backends (N covers the scalar range, the 2 covers normal versus NaN, it is a 2D map because of how normal scalar values should properly interpolate to NaN). When interp before mapping is on we do create a 2xN texture and texture coordinates. The texture coordinate maps the scalar values into the texture map. Interpolation is done in the fragment shader by texture lookup. The process for cell data is a bit different but in that case there is no interpolation. There we use a texture to map cellids to colors I believe. If you have point scalars, and you write out the 2xN texture map along with the color texture coordinates generated for it (not the texture coordinates that might have come from the model or a source), then that should be correct. Also, in OpenGL case, vtkPainter was available. This is missing in OpenGL2. > Where has this functionality moved to or is it missing? > OpenGL2 has a different design that does not use painters. > > Nenad. > > On Tue, Apr 25, 2017 at 11:59 AM, Nenad Vujicic wrote: > >> David, >> >> Thank you very much for your response! I tried what you suggested and it >> worked, but, I'm getting bad texture, i.e. I get texture 2xN, where N is >> number of segments in colormap and the exported texture mapped object looks >> like I turned OFF InterpolateScalarsBeforeMapping flag. I would like to >> simulate InterpolateScalarsBeforeMapping behavior by baking entire >> texture first and exporting it. You can easily see difference if you create >> Wavelet source, turn ON Surface representation, select RTData array for >> coloring and set Number Of Table Values (in Color Map Editor) to e.g. 5. >> >> What I did in background is: I patched vtkCompositePolyDataMapper2Internal >> and vtkCompositePolyDataMapper2, so I'm able to access appropriate block >> mapper and get rid of old colormap texture, coordinates, colors, call >> MapScalars(), dump created ColorMapTexture to .vti file (everything >> performed on block-mapper). >> >> Do you have some idea where I made mistake? >> >> Thanks in advance! >> >> Nenad. >> >> >> On Thu, Apr 13, 2017 at 2:33 PM, David E DeMarle < >> dave.dema...@kitware.com> wrote: >> >>> Hi Nenand, >>> >>> You might try vtkMapper::GetColorMapColors/C >>> olorCoordinates/ColorTextureMap. I'm using this in the OSPRay renderer >>> for example. >>> >>> Out of curiosity is this for the p2f3d exporter plugin? >>> >>> cheers >>> >>> >>> David E DeMarle >>> Kitware, Inc. >>> R&D Engineer >>> 21 Corporate Drive >>> Clifton Park, NY 12065-8662 >>> Phone: 518-881-4909 <(518)%20881-4909> >>> >>> On Tue, Apr 11, 2017 at 6:34 AM, Nenad Vujicic >>> wrote: >>> Hello everyone, I've just started building my ParaView exporter plugin using ParaView v5.3 with OpenGL2 selected for backend rendering (PARAVIEW_RENDERING_BACKEND), however, I'm having troubles with generating textures from scalars used for coloring the meshes. What I'm actually doing here is that I'm generating texture from currently selected array and lookup-table and I export texture mapped object instead of exporting object plus scalars and colormap or colors. Previously (with OpenGL used for backend rendering), I was deriving class from vtkScalarsToColorsPainter class for this purpose, however, now, this class is not used anymore with OpenGL2. Does anyone have idea how to solve this problem? Thanks in advance, Nenad. ___ 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 >>> >> > > ___ > Powered by www.kitware.com > > Visit other Kitware open-source projects at http://www.kitware.com/opensou > rce/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 > > > -- Ken Martin PhD Distinguished Engineer Kitware Inc. 28 Corporate Drive Clifton Park NY 12065 This communication, including all attachments, contains confidential and legally privileged inform
Re: [Paraview] ParaView v5.3: Generating textures from scalars and lookup table
Hello everyone, Does anyone have idea how to solve generating textures problem? I continued to decompose the problem and I'm curious, is interpolation of scalars before mapping performed (when OpenGL2 is selected) by shaders (on-the-fly, during display) or is an intermediate texture generated? Also, in OpenGL case, vtkPainter was available. This is missing in OpenGL2. Where has this functionality moved to or is it missing? Nenad. On Tue, Apr 25, 2017 at 11:59 AM, Nenad Vujicic wrote: > David, > > Thank you very much for your response! I tried what you suggested and it > worked, but, I'm getting bad texture, i.e. I get texture 2xN, where N is > number of segments in colormap and the exported texture mapped object looks > like I turned OFF InterpolateScalarsBeforeMapping flag. I would like to > simulate InterpolateScalarsBeforeMapping behavior by baking entire > texture first and exporting it. You can easily see difference if you create > Wavelet source, turn ON Surface representation, select RTData array for > coloring and set Number Of Table Values (in Color Map Editor) to e.g. 5. > > What I did in background is: I patched vtkCompositePolyDataMapper2Internal > and vtkCompositePolyDataMapper2, so I'm able to access appropriate block > mapper and get rid of old colormap texture, coordinates, colors, call > MapScalars(), dump created ColorMapTexture to .vti file (everything > performed on block-mapper). > > Do you have some idea where I made mistake? > > Thanks in advance! > > Nenad. > > > On Thu, Apr 13, 2017 at 2:33 PM, David E DeMarle > wrote: > >> Hi Nenand, >> >> You might try vtkMapper::GetColorMapColors/C >> olorCoordinates/ColorTextureMap. I'm using this in the OSPRay renderer >> for example. >> >> Out of curiosity is this for the p2f3d exporter plugin? >> >> cheers >> >> >> David E DeMarle >> Kitware, Inc. >> R&D Engineer >> 21 Corporate Drive >> Clifton Park, NY 12065-8662 >> Phone: 518-881-4909 <(518)%20881-4909> >> >> On Tue, Apr 11, 2017 at 6:34 AM, Nenad Vujicic wrote: >> >>> Hello everyone, >>> >>> I've just started building my ParaView exporter plugin using ParaView >>> v5.3 with OpenGL2 selected for backend rendering >>> (PARAVIEW_RENDERING_BACKEND), however, I'm having troubles with generating >>> textures from scalars used for coloring the meshes. What I'm actually doing >>> here is that I'm generating texture from currently selected array and >>> lookup-table and I export texture mapped object instead of exporting object >>> plus scalars and colormap or colors. Previously (with OpenGL used for >>> backend rendering), I was deriving class from vtkScalarsToColorsPainter >>> class for this purpose, however, now, this class is not used anymore with >>> OpenGL2. >>> >>> Does anyone have idea how to solve this problem? >>> >>> Thanks in advance, >>> Nenad. >>> >>> ___ >>> 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 >>> >>> >> > ___ 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
Re: [Paraview] ParaView v5.3: Generating textures from scalars and lookup table
David, Thank you very much for your response! I tried what you suggested and it worked, but, I'm getting bad texture, i.e. I get texture 2xN, where N is number of segments in colormap and the exported texture mapped object looks like I turned OFF InterpolateScalarsBeforeMapping flag. I would like to simulate InterpolateScalarsBeforeMapping behavior by baking entire texture first and exporting it. You can easily see difference if you create Wavelet source, turn ON Surface representation, select RTData array for coloring and set Number Of Table Values (in Color Map Editor) to e.g. 5. What I did in background is: I patched vtkCompositePolyDataMapper2Internal and vtkCompositePolyDataMapper2, so I'm able to access appropriate block mapper and get rid of old colormap texture, coordinates, colors, call MapScalars(), dump created ColorMapTexture to .vti file (everything performed on block-mapper). Do you have some idea where I made mistake? Thanks in advance! Nenad. On Thu, Apr 13, 2017 at 2:33 PM, David E DeMarle wrote: > Hi Nenand, > > You might try vtkMapper::GetColorMapColors/ColorCoordinates/ColorTextureMap. > I'm using this in the OSPRay renderer for example. > > Out of curiosity is this for the p2f3d exporter plugin? > > cheers > > > David E DeMarle > Kitware, Inc. > R&D Engineer > 21 Corporate Drive > Clifton Park, NY 12065-8662 > Phone: 518-881-4909 <(518)%20881-4909> > > On Tue, Apr 11, 2017 at 6:34 AM, Nenad Vujicic wrote: > >> Hello everyone, >> >> I've just started building my ParaView exporter plugin using ParaView >> v5.3 with OpenGL2 selected for backend rendering >> (PARAVIEW_RENDERING_BACKEND), however, I'm having troubles with generating >> textures from scalars used for coloring the meshes. What I'm actually doing >> here is that I'm generating texture from currently selected array and >> lookup-table and I export texture mapped object instead of exporting object >> plus scalars and colormap or colors. Previously (with OpenGL used for >> backend rendering), I was deriving class from vtkScalarsToColorsPainter >> class for this purpose, however, now, this class is not used anymore with >> OpenGL2. >> >> Does anyone have idea how to solve this problem? >> >> Thanks in advance, >> Nenad. >> >> ___ >> 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 >> >> > ___ 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
Re: [Paraview] ParaView v5.3: Generating textures from scalars and lookup table
Hi Nenand, You might try vtkMapper::GetColorMapColors/ColorCoordinates/ColorTextureMap. I'm using this in the OSPRay renderer for example. Out of curiosity is this for the p2f3d exporter plugin? cheers David E DeMarle Kitware, Inc. R&D Engineer 21 Corporate Drive Clifton Park, NY 12065-8662 Phone: 518-881-4909 On Tue, Apr 11, 2017 at 6:34 AM, Nenad Vujicic wrote: > Hello everyone, > > I've just started building my ParaView exporter plugin using ParaView v5.3 > with OpenGL2 selected for backend rendering (PARAVIEW_RENDERING_BACKEND), > however, I'm having troubles with generating textures from scalars used for > coloring the meshes. What I'm actually doing here is that I'm generating > texture from currently selected array and lookup-table and I export texture > mapped object instead of exporting object plus scalars and colormap or > colors. Previously (with OpenGL used for backend rendering), I was deriving > class from vtkScalarsToColorsPainter class for this purpose, however, now, > this class is not used anymore with OpenGL2. > > Does anyone have idea how to solve this problem? > > Thanks in advance, > Nenad. > > ___ > 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 > > ___ 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
[Paraview] ParaView v5.3: Generating textures from scalars and lookup table
Hello everyone, I've just started building my ParaView exporter plugin using ParaView v5.3 with OpenGL2 selected for backend rendering (PARAVIEW_RENDERING_BACKEND), however, I'm having troubles with generating textures from scalars used for coloring the meshes. What I'm actually doing here is that I'm generating texture from currently selected array and lookup-table and I export texture mapped object instead of exporting object plus scalars and colormap or colors. Previously (with OpenGL used for backend rendering), I was deriving class from vtkScalarsToColorsPainter class for this purpose, however, now, this class is not used anymore with OpenGL2. Does anyone have idea how to solve this problem? Thanks in advance, Nenad. ___ 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
