Re: [Paraview] Quadrature in Paraview
One quick question though. Interpolate to quadrature points and generate quadrature points seems to be used for interpolating the nodal values and coloring the quadrature points appropriately. Is there anyway to have quadrature point data and then interpolate to the cell and color it appropriately. not currently, someone would have to add a filter for this. Adding a filter is too not a difficult a task ;-) Also FYI, Paraview still crashes when making the quadrature dictionary for hexahedral elements. It's probably not a big deal, I can make my own. I suspect that you are trying to use the example dictionary generator that's built into PV. However, this generator doesn't provide a definition for hexahedral cells. Its primary purpose is to serve as an example of how one write a dictionary generator. it was never intended to be a comprehensive source of quadrature scheme definitions. The idea with the dictionary generators is that practitioners would provide them for their specific use cases. If my suspicion is incorrect, please give some more detail about the crash? and any output in the terminal? I also want to warn about using ascii format for large models, because it's slow. The appended format is far better, although it may be slightly more challenging to write your data that way if you're not using vtk writers. Glad you've had some success! The patches were merged over the weekend, so you could use the nightly binaries now. Burlen On 03/31/2013 01:10 PM, afad sfgsfdgsfd wrote: Andy Bauer, Thank you for informing me about the nightly builds. I will keep that in mind from now on. Burlin Loring, So I implemented the patch and got everything compiled. I am now able to use all the quadrature filters and do the examples. Took me awhile because I was trying to compile for 64 bit when the qt libraries I downloaded were only 32 bit. One quick question though. Interpolate to quadrature points and generate quadrature points seems to be used for interpolating the nodal values and coloring the quadrature points appropriately. Is there anyway to have quadrature point data and then interpolate to the cell and color it appropriately. For example if I am using a linear element, stress would be constant in the cell, thus VTK would color each cell with constant stress. If I used quadratic elements, stress would be linear in each cell, thus VTK would color each cell linearly. Also FYI, Paraview still crashes when making the quadrature dictionary for hexahedral elements. It's probably not a big deal, I can make my own. But, Paraview does crash when attempting to do this. Thank you both so much for helping me, I really appreciate it. Date: Fri, 29 Mar 2013 10:01:20 -0700 From: blor...@lbl.gov To: deutchl...@hotmail.com CC: paraview@paraview.org Subject: Re: [Paraview] Quadrature in Paraview Hi afad sfgsfdgsfd, Your example(quadratic tera) actually works with a very slight modification: move the cell offset data to the top of the element. That's clearly a bug in the reader(when reading inline data, the regression tests only check that the appended mode works, so that's why this bug slipped through.) . I attached the modified file so you see exactly what I meant. Burlen On 03/29/2013 09:43 AM, Burlen Loring wrote: Hi afad sfgsfdgsfd, Fixes for bugs introduced by changes in VTK's xml file format are in the pipeline, so you'll have to checkout the latest git HEAD and build ParaView from source to get the bug fixes. If that's something you're willing to do, here are first steps # get sources $ git clone --recursive git://www.paraview.org/ParaView.git # apply the patch # patch is attached and I just now submitted to PV, will show up in PV after the next review. $ cd ParaView $ git am -3 0001-QuadraturePoints-any-integer-type-for-offsets.patch # build pv That will get you the bug fixes. Build it, use default build opts is fine. Then if you like you can get the test data, and open the file ParaViewData/Data/blow.vtk, construct the pipeline showed in the post (http://markmail.org/message/6qz3ebszvny4vwxp#query:+page:1+mid:6qz3ebszvny4vwxp+state:results). That shows how it's supposed to work. $ git clone www.paraview.org/ParaViewData.git http://www.paraview.org/ParaViewData.git Now onto your data, the xml you gave is incorrect , it's missing the offset array. let me see if I can get your example working, I'll post a follow up, hopefully in a few minutes. Burlen On 03/28/2013 12:43 AM, afad sfgsfdgsfd wrote: I am trying to understand quadrature in paraview. I am running finite element simulations in which I have displacements at the nodes of the element, and stress/strain at the quadrature points. I have linear and quadratic
Re: [Paraview] Quadrature in Paraview
Andy Bauer, Thank you for informing me about the nightly builds. I will keep that in mind from now on. Burlin Loring, So I implemented the patch and got everything compiled. I am now able to use all the quadrature filters and do the examples. Took me awhile because I was trying to compile for 64 bit when the qt libraries I downloaded were only 32 bit. One quick question though. Interpolate to quadrature points and generate quadrature points seems to be used for interpolating the nodal values and coloring the quadrature points appropriately. Is there anyway to have quadrature point data and then interpolate to the cell and color it appropriately. For example if I am using a linear element, stress would be constant in the cell, thus VTK would color each cell with constant stress. If I used quadratic elements, stress would be linear in each cell, thus VTK would color each cell linearly. Also FYI, Paraview still crashes when making the quadrature dictionary for hexahedral elements. It's probably not a big deal, I can make my own. But, Paraview does crash when attempting to do this. Thank you both so much for helping me, I really appreciate it. Date: Fri, 29 Mar 2013 10:01:20 -0700 From: blor...@lbl.gov To: deutchl...@hotmail.com CC: paraview@paraview.org Subject: Re: [Paraview] Quadrature in Paraview Hi afad sfgsfdgsfd, Your example(quadratic tera) actually works with a very slight modification: move the cell offset data to the top of the element. That's clearly a bug in the reader(when reading inline data, the regression tests only check that the appended mode works, so that's why this bug slipped through.) . I attached the modified file so you see exactly what I meant. Burlen On 03/29/2013 09:43 AM, Burlen Loring wrote: Hi afad sfgsfdgsfd, Fixes for bugs introduced by changes in VTK's xml file format are in the pipeline, so you'll have to checkout the latest git HEAD and build ParaView from source to get the bug fixes. If that's something you're willing to do, here are first steps # get sources $ git clone --recursive git://www.paraview.org/ParaView.git # apply the patch # patch is attached and I just now submitted to PV, will show up in PV after the next review. $ cd ParaView $ git am -3 0001-QuadraturePoints-any-integer-type-for-offsets.patch # build pv That will get you the bug fixes. Build it, use default build opts is fine. Then if you like you can get the test data, and open the file ParaViewData/Data/blow.vtk, construct the pipeline showed in the post (http://markmail.org/message/6qz3ebszvny4vwxp#query:+page:1+mid:6qz3ebszvny4vwxp+state:results). That shows how it's supposed to work. $ git clone www.paraview.org/ParaViewData.git Now onto your data, the xml you gave is incorrect , it's missing the offset array. let me see if I can get your example working, I'll post a follow up, hopefully in a few minutes. Burlen On 03/28/2013 12:43 AM, afad sfgsfdgsfd wrote: I am trying to understand quadrature in paraview. I am running finite element simulations in which I have displacements at the nodes of the element, and stress/strain at the quadrature points. I have linear and quadratic hexahedral or tetrahedral elements. I have been spending days trying to figure out how to implement data on the quadrature points. I have downloaded just about every document I can find. First: I downloaded CylinderQuadratic.vtk as shown in VTK-Quadrature-Point-Design-Doc. I was able to generate the quadrature scheme dictioanary and generate quadrature points. But, when I tried to use the Interpolate to Quadrature Points filter I could not select QuadratureOffset in the Select Source Array drop down menu. I was able to do this when using the Generate Quadrature Points filter. Second: Considering I couldn't figure out how to interpolate quadrature points using CylinderQuadratic.vtk, I decided to investigate just using a single element. I took quadraticTetra01.vtu and modified it to only have on quadratic tetrahedron. Then I used paraview to generate the quadrature scheme dictionary. I saved this into a VTU file in order to see how to implement the dictionary on my own. When I tried to reopen this new VTU file, paraview was unable to open
Re: [Paraview] Quadrature in Paraview
Hi afad sfgsfdgsfd, Fixes for bugs introduced by changes in VTK's xml file format are in the pipeline, so you'll have to checkout the latest git HEAD and build ParaView from source to get the bug fixes. If that's something you're willing to do, here are first steps # get sources $ git clone --recursive git://www.paraview.org/ParaView.git # apply the patch # patch is attached and I just now submitted to PV, will show up in PV after the next review. $ cd ParaView $ git am -3 0001-QuadraturePoints-any-integer-type-for-offsets.patch # build pv That will get you the bug fixes. Build it, use default build opts is fine. Then if you like you can get the test data, and open the file ParaViewData/Data/blow.vtk, construct the pipeline showed in the post (http://markmail.org/message/6qz3ebszvny4vwxp#query:+page:1+mid:6qz3ebszvny4vwxp+state:results). That shows how it's supposed to work. $ git clone www.paraview.org/ParaViewData.git Now onto your data, the xml you gave is incorrect , it's missing the offset array. let me see if I can get your example working, I'll post a follow up, hopefully in a few minutes. Burlen On 03/28/2013 12:43 AM, afad sfgsfdgsfd wrote: I am trying to understand quadrature in paraview. I am running finite element simulations in which I have displacements at the nodes of the element, and stress/strain at the quadrature points. I have linear and quadratic hexahedral or tetrahedral elements. I have been spending days trying to figure out how to implement data on the quadrature points. I have downloaded just about every document I can find. First: I downloaded CylinderQuadratic.vtk as shown in VTK-Quadrature-Point-Design-Doc. I was able to generate the quadrature scheme dictioanary and generate quadrature points. But, when I tried to use the Interpolate to Quadrature Points filter I could not select QuadratureOffset in the Select Source Array drop down menu. I was able to do this when using the Generate Quadrature Points filter. Second: Considering I couldn't figure out how to interpolate quadrature points using CylinderQuadratic.vtk, I decided to investigate just using a single element. I took quadraticTetra01.vtu and modified it to only have on quadratic tetrahedron. Then I used paraview to generate the quadrature scheme dictionary. I saved this into a VTU file in order to see how to implement the dictionary on my own. When I tried to reopen this new VTU file, paraview was unable to open the file. Specifically, it choked on the QuadratureOffset data array. This is the file that paraview cannot open VTKFile type=UnstructuredGrid version=0.1 byte_order=LittleEndian UnstructuredGrid Piece NumberOfPoints=10 NumberOfCells=1 PointData Scalars=scalars DataArray type=Float32 Name=scalars format=ascii RangeMin=0 RangeMax=1 1 1 1 1 0 0 0 0 0 0 /DataArray /PointData CellData DataArray type=Int64 Name=QuadratureOffset format=ascii RangeMin=0 RangeMax=0 InformationKey name=DICTIONARY location=vtkQuadratureSchemeDefinition vtkQuadratureSchemeDefinition CellType value=24 /CellType NumberOfNodes value=10 /NumberOfNodes NumberOfQuadraturePoints value=4 /NumberOfQuadraturePoints ShapeFunctionWeights 1.5625e-001 -9.3750e-002 -9.3750e-002 -9.3750e-002 3.1250e-001 6.2500e-002 3.1250e-001 3.1250e-001 6.2500e-002 6.2500e-002 -9.3750e-002 7.03125000e-002 -1.17187500e-001 -9.3750e-002 2.8125e-001 4.21875000e-001 9.3750e-002 6.2500e-002 2.8125e-001 9.3750e-002 -9.3750e-002 -1.17187500e-001 7.03125000e-002 -9.3750e-002 9.3750e-002 4.21875000e-001 2.8125e-001 6.2500e-002 9.3750e-002 2.8125e-001 -9.3750e-002 -5.46875000e-002 -5.46875000e-002 3.7500e-001 3.1250e-002 1.5625e-002 3.1250e-002 3.7500e-001 1.8750e-001 1.8750e-001 /ShapeFunctionWeights QuadratureWeights 2.1219962781139991e-314 2.1219957914593380e-314 1.1013158155129526e-311 1.1501217187461613e-311 /QuadratureWeights /vtkQuadratureSchemeDefinition /InformationKey 0 /DataArray /CellData Points DataArray type=Float32 Name=Points NumberOfComponents=3 format=ascii RangeMin=0 RangeMax=1.1874342107 0 0 0 1 0 0 0.5
Re: [Paraview] Quadrature in Paraview
Hi, FYI: We now generate installers for ParaView nightly for git HEAD. They're available at http://www.paraview.org/paraview/resources/software.php and by choosing Nightly for Version of ParaView. Andy On Fri, Mar 29, 2013 at 12:43 PM, Burlen Loring blor...@lbl.gov wrote: Hi afad sfgsfdgsfd, Fixes for bugs introduced by changes in VTK's xml file format are in the pipeline, so you'll have to checkout the latest git HEAD and build ParaView from source to get the bug fixes. If that's something you're willing to do, here are first steps # get sources $ git clone --recursive git://www.paraview.org/ParaView.git # apply the patch # patch is attached and I just now submitted to PV, will show up in PV after the next review. $ cd ParaView $ git am -3 0001-QuadraturePoints-any-integer-type-for-offsets.patch # build pv That will get you the bug fixes. Build it, use default build opts is fine. Then if you like you can get the test data, and open the file ParaViewData/Data/blow.vtk, construct the pipeline showed in the post ( http://markmail.org/message/6qz3ebszvny4vwxp#query:+page:1+mid:6qz3ebszvny4vwxp+state:results). That shows how it's supposed to work. $ git clone www.paraview.org/ParaViewData.git Now onto your data, the xml you gave is incorrect , it's missing the offset array. let me see if I can get your example working, I'll post a follow up, hopefully in a few minutes. Burlen On 03/28/2013 12:43 AM, afad sfgsfdgsfd wrote: I am trying to understand quadrature in paraview. I am running finite element simulations in which I have displacements at the nodes of the element, and stress/strain at the quadrature points. I have linear and quadratic hexahedral or tetrahedral elements. I have been spending days trying to figure out how to implement data on the quadrature points. I have downloaded just about every document I can find. First: I downloaded CylinderQuadratic.vtk as shown in VTK-Quadrature-Point-Design-Doc. I was able to generate the quadrature scheme dictioanary and generate quadrature points. But, when I tried to use the Interpolate to Quadrature Points filter I could not select QuadratureOffset in the Select Source Array drop down menu. I was able to do this when using the Generate Quadrature Points filter. Second: Considering I couldn't figure out how to interpolate quadrature points using CylinderQuadratic.vtk, I decided to investigate just using a single element. I took quadraticTetra01.vtu and modified it to only have on quadratic tetrahedron. Then I used paraview to generate the quadrature scheme dictionary. I saved this into a VTU file in order to see how to implement the dictionary on my own. When I tried to reopen this new VTU file, paraview was unable to open the file. Specifically, it choked on the QuadratureOffset data array. This is the file that paraview cannot open VTKFile type=UnstructuredGrid version=0.1 byte_order=LittleEndian UnstructuredGrid Piece NumberOfPoints=10 NumberOfCells=1 PointData Scalars=scalars DataArray type=Float32 Name=scalars format=ascii RangeMin=0 RangeMax=1 1 1 1 1 0 0 0 0 0 0 /DataArray /PointData CellData DataArray type=Int64 Name=QuadratureOffset format=ascii RangeMin=0 RangeMax=0 InformationKey name=DICTIONARY location=vtkQuadratureSchemeDefinition vtkQuadratureSchemeDefinition CellType value=24 /CellType NumberOfNodes value=10 /NumberOfNodes NumberOfQuadraturePoints value=4 /NumberOfQuadraturePoints ShapeFunctionWeights 1.5625e-001 -9.3750e-002 -9.3750e-002 -9.3750e-002 3.1250e-001 6.2500e-002 3.1250e-001 3.1250e-001 6.2500e-002 6.2500e-002 -9.3750e-002 7.03125000e-002 -1.17187500e-001 -9.3750e-002 2.8125e-001 4.21875000e-001 9.3750e-002 6.2500e-002 2.8125e-001 9.3750e-002 -9.3750e-002 -1.17187500e-001 7.03125000e-002 -9.3750e-002 9.3750e-002 4.21875000e-001 2.8125e-001 6.2500e-002 9.3750e-002 2.8125e-001 -9.3750e-002 -5.46875000e-002 -5.46875000e-002 3.7500e-001 3.1250e-002 1.5625e-002 3.1250e-002 3.7500e-001 1.8750e-001 1.8750e-001 /ShapeFunctionWeights QuadratureWeights 2.1219962781139991e-314 2.1219957914593380e-314 1.1013158155129526e-311
Re: [Paraview] Quadrature in Paraview
That's good to know, however, you should follow my instructions for now since you have to apply the patch I sent. On 03/29/2013 09:49 AM, Andy Bauer wrote: Hi, FYI: We now generate installers for ParaView nightly for git HEAD. They're available at http://www.paraview.org/paraview/resources/software.php and by choosing Nightly for Version of ParaView. Andy On Fri, Mar 29, 2013 at 12:43 PM, Burlen Loring blor...@lbl.gov mailto:blor...@lbl.gov wrote: Hi afad sfgsfdgsfd, Fixes for bugs introduced by changes in VTK's xml file format are in the pipeline, so you'll have to checkout the latest git HEAD and build ParaView from source to get the bug fixes. If that's something you're willing to do, here are first steps # get sources $ git clone --recursive git://www.paraview.org/ParaView.git http://www.paraview.org/ParaView.git # apply the patch # patch is attached and I just now submitted to PV, will show up in PV after the next review. $ cd ParaView $ git am -3 0001-QuadraturePoints-any-integer-type-for-offsets.patch # build pv That will get you the bug fixes. Build it, use default build opts is fine. Then if you like you can get the test data, and open the file ParaViewData/Data/blow.vtk, construct the pipeline showed in the post (http://markmail.org/message/6qz3ebszvny4vwxp#query:+page:1+mid:6qz3ebszvny4vwxp+state:results). That shows how it's supposed to work. $ git clone www.paraview.org/ParaViewData.git http://www.paraview.org/ParaViewData.git Now onto your data, the xml you gave is incorrect , it's missing the offset array. let me see if I can get your example working, I'll post a follow up, hopefully in a few minutes. Burlen On 03/28/2013 12:43 AM, afad sfgsfdgsfd wrote: I am trying to understand quadrature in paraview. I am running finite element simulations in which I have displacements at the nodes of the element, and stress/strain at the quadrature points. I have linear and quadratic hexahedral or tetrahedral elements. I have been spending days trying to figure out how to implement data on the quadrature points. I have downloaded just about every document I can find. First: I downloaded CylinderQuadratic.vtk as shown in VTK-Quadrature-Point-Design-Doc. I was able to generate the quadrature scheme dictioanary and generate quadrature points. But, when I tried to use the Interpolate to Quadrature Points filter I could not select QuadratureOffset in the Select Source Array drop down menu. I was able to do this when using the Generate Quadrature Points filter. Second: Considering I couldn't figure out how to interpolate quadrature points using CylinderQuadratic.vtk, I decided to investigate just using a single element. I took quadraticTetra01.vtu and modified it to only have on quadratic tetrahedron. Then I used paraview to generate the quadrature scheme dictionary. I saved this into a VTU file in order to see how to implement the dictionary on my own. When I tried to reopen this new VTU file, paraview was unable to open the file. Specifically, it choked on the QuadratureOffset data array. This is the file that paraview cannot open VTKFile type=UnstructuredGrid version=0.1 byte_order=LittleEndian UnstructuredGrid Piece NumberOfPoints=10 NumberOfCells=1 PointData Scalars=scalars DataArray type=Float32 Name=scalars format=ascii RangeMin=0 RangeMax=1 1 1 1 1 0 0 0 0 0 0 /DataArray /PointData CellData DataArray type=Int64 Name=QuadratureOffset format=ascii RangeMin=0 RangeMax=0 InformationKey name=DICTIONARY location=vtkQuadratureSchemeDefinition vtkQuadratureSchemeDefinition CellType value=24 /CellType NumberOfNodes value=10 /NumberOfNodes NumberOfQuadraturePoints value=4 /NumberOfQuadraturePoints ShapeFunctionWeights 1.5625e-001 -9.3750e-002 -9.3750e-002 -9.3750e-002 3.1250e-001 6.2500e-002 3.1250e-001 3.1250e-001 6.2500e-002 6.2500e-002 -9.3750e-002 7.03125000e-002 -1.17187500e-001 -9.3750e-002 2.8125e-001 4.21875000e-001 9.3750e-002 6.2500e-002 2.8125e-001 9.3750e-002 -9.3750e-002 -1.17187500e-001 7.03125000e-002 -9.3750e-002 9.3750e-002 4.21875000e-001
[Paraview] Quadrature in Paraview
I am trying to understand quadrature in paraview. I am running finite element simulations in which I have displacements at the nodes of the element, and stress/strain at the quadrature points. I have linear and quadratic hexahedral or tetrahedral elements. I have been spending days trying to figure out how to implement data on the quadrature points. I have downloaded just about every document I can find. First: I downloaded CylinderQuadratic.vtk as shown in VTK-Quadrature-Point-Design-Doc. I was able to generate the quadrature scheme dictioanary and generate quadrature points. But, when I tried to use the Interpolate to Quadrature Points filter I could not select QuadratureOffset in the Select Source Array drop down menu. I was able to do this when using the Generate Quadrature Points filter. Second: Considering I couldn't figure out how to interpolate quadrature points using CylinderQuadratic.vtk, I decided to investigate just using a single element. I took quadraticTetra01.vtu and modified it to only have on quadratic tetrahedron. Then I used paraview to generate the quadrature scheme dictionary. I saved this into a VTU file in order to see how to implement the dictionary on my own. When I tried to reopen this new VTU file, paraview was unable to open the file. Specifically, it choked on the QuadratureOffset data array.This is the file that paraview cannot open VTKFile type=UnstructuredGrid version=0.1 byte_order=LittleEndian UnstructuredGridPiece NumberOfPoints=10 NumberOfCells=1 PointData Scalars=scalarsDataArray type=Float32 Name=scalars format=ascii RangeMin=0 RangeMax=1 1 1 1 1 0 0 0 0 0 0 /DataArray /PointData CellDataDataArray type=Int64 Name=QuadratureOffset format=ascii RangeMin=0 RangeMax=0 InformationKey name=DICTIONARY location=vtkQuadratureSchemeDefinition vtkQuadratureSchemeDefinitionCellType value=24 /CellTypeNumberOfNodes value=10 /NumberOfNodesNumberOfQuadraturePoints value=4 /NumberOfQuadraturePointsShapeFunctionWeights 1.5625e-001 -9.3750e-002 -9.3750e-002 -9.3750e-002 3.1250e-001 6.2500e-002 3.1250e-001 3.1250e-001 6.2500e-002 6.2500e-002 -9.3750e-002 7.03125000e-002 -1.17187500e-001 -9.3750e-002 2.8125e-001 4.21875000e-001 9.3750e-002 6.2500e-002 2.8125e-001 9.3750e-002 -9.3750e-002 -1.17187500e-001 7.03125000e-002 -9.3750e-002 9.3750e-002 4.21875000e-001 2.8125e-001 6.2500e-002 9.3750e-002 2.8125e-001 -9.3750e-002 -5.46875000e-002 -5.46875000e-002 3.7500e-001 3.1250e-002 1.5625e-002 3.1250e-002 3.7500e-001 1.8750e-001 1.8750e-001/ShapeFunctionWeights QuadratureWeights 2.1219962781139991e-314 2.1219957914593380e-314 1.1013158155129526e-311 1.1501217187461613e-311 /QuadratureWeights /vtkQuadratureSchemeDefinition /InformationKey 0/DataArray /CellData PointsDataArray type=Float32 Name=Points NumberOfComponents=3 format=ascii RangeMin=0 RangeMax=1.1874342107 0 0 0 1 0 0 0.5 0.8001192 0 0.5 0.4000596 1 0.5 0 -0.2000298 0.6002384 0.6002384 0 0.3001192 0.4000596 0 0.4000596 0.2000298 0.5 0.8502384 0.3001192 0.5 0.5 0.6002384 0.4498808/DataArray /Points CellsDataArray type=Int64 Name=connectivity format=ascii RangeMin=0 RangeMax=9 0 1 2 3 4 5 6 7 8 9 /DataArrayDataArray type=Int64 Name=offsets format=ascii RangeMin=10 RangeMax=10 10/DataArray DataArray type=UInt8 Name=types format=ascii RangeMin=24 RangeMax=24 24/DataArray /Cells/Piece /UnstructuredGrid/VTKFile Third: I investigated quadrature for hexahedron. I made a similar file to quadraticTetra01.vtu and tried to generate a quadrature dictionary. Upon hitting apply for this, paraview crashes. It crashes for both linear and quadratic hexahedron. This is the file it crashes on, ?xml version=1.0?VTKFile type=UnstructuredGrid version=0.1 byte_order=LittleEndian compressor=vtkZLibDataCompressor UnstructuredGridPiece NumberOfPoints=12 NumberOfCells=2
