Hi all, Indeed, rather than supporting only 'unsigned char' for direct color mapping - using color mode VTK_COLOR_MODE_DEFAULT, all integer and floating point types can be used for direct color mapping using the color mode VTK_COLOR_MODE_DIRECT_SCALARS. Integer type colors should be between 0-255 and floating point colors should be between 0-1.
Dan On Mon, May 8, 2017 at 10:16 PM, Cory Quammen <[email protected]> wrote: > > I tried it your way in ParaView 5.3.0, and it did not work correctly. Are > > you sure this is implemented in 5.3 and not a new feature in the upcoming > > 5.4? > > Ken, > > This was implemented some time ago. In 5.3.0, I could do the following: > > * Add Sphere Source > * Add Programmable Filter with the Script set to > > A = inputs[0].PointData['Normals'][:,0] > B = inputs[0].PointData['Normals'][:,1] > C = inputs[0].PointData['Normals'][:,2] > colors = numpy.empty((len(A),3), dtype='float') > colors[:,0] = A > colors[:,1] = B > colors[:,2] = C > output.PointData.append(colors, 'colors') > > * Turn off Map Scalars > > You could also skip this silly use of the Programmable Filter > altogether and color the Sphere source by 'Normals', then turn Map > Scalars off. > > I believe the capability to treat floating-point arrays of 3-tuples > was added to VTK in commit > > commit 00de9a942ff74e797fbe4cd8c67307c8065cdade > Author: Dan Lipsa <[email protected]> > Date: Thu Nov 20 13:35:35 2014 -0500 > > Add VTK_COLOR_MODE_DIRECT_SCALARS. See vtkScalarsToColors::MapScalars. > > - Cory > > > From: Shawn Waldon [mailto:[email protected]] > > Sent: Monday, May 8, 2017 12:11 PM > > To: Moreland, Kenneth <[email protected]> > > Cc: Thomas Oliveira <[email protected]>; ParaView > > <[email protected]> > > Subject: [EXTERNAL] Re: [Paraview] Visualization ternary saturation > > > > > > > > Ken beat me to answering this one... I'll just add that if the data is > > floating point in the range [0, 1], you don't need to convert it to > uint8 or > > multiply by 255. Just creating a floating point vector will give the > same > > result. This is a more recent extension of the functionality: I know it > > works in 5.3 and master but I'm not sure how many versions back support > it. > > > > A = inputs[0].CellData['A'] > > > > B = inputs[0].CellData['B'] > > > > C = inputs[0].CellData['C'] > > > > colors = numpy.empty((len(A),3), dtype='float') > > > > colors[:,0] = A > > > > colors[:,1] = B > > > > colors[:,2] = C > > > > output.CellData.append(colors, 'colors') > > > > > > HTH, > > > > Shawn > > > > > > > > On Mon, May 8, 2017 at 1:56 PM, Moreland, Kenneth <[email protected]> > wrote: > > > > ParaView does not directly support ternary color maps, but if you create > a > > field of colors (represented by three unsigned chars), then you can > render > > those colors directly by turning off the Map Scalars option. You can > create > > these colors with a Programmable Filter with a script like the following: > > > > > > > > A = inputs[0].CellData['A'] > > > > B = inputs[0].CellData['B'] > > > > C = inputs[0].CellData['C'] > > > > colors = numpy.empty((len(A),3), dtype='uint8') > > > > colors[:,0] = A*255 > > > > colors[:,1] = B*255 > > > > colors[:,2] = C*255 > > > > output.CellData.append(colors, 'colors') > > > > > > > > Once you apply that script, color by the new “colors” array and uncheck > the > > box marked “Map Scalars” (it is an advanced option in the properties > panel). > > > > > > > > -Ken > > > > > > > > From: ParaView [mailto:[email protected]] On Behalf Of > Thomas > > Oliveira > > Sent: Saturday, May 6, 2017 7:24 AM > > To: ParaView <[email protected]> > > Subject: [EXTERNAL] [Paraview] Visualization ternary saturation > > > > > > > > Dear all, > > > > Given three cell arrays (A,B,C) representation saturations (A+B+C = 1 for > > every cell) is it possible to generate a ternary saturation image like > the > > one attached (obtained in > > http://www.esss.com.br/Kraken/wp-content/uploads/2014/07/ > Ternary-Saturation.png)? > > > > In the figure, A, B, C are saturations of water, oil and gas. > > > > Best regards, > > > > Thomas Oliveira > > > > > > _______________________________________________ > > 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 > > > > > > -- > 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
