Re: [Paraview] block merging using Paraview
Andy, Thanks for your help. I have attached two simple files I am trying to merge. But looking at the problem, I am afraid you will tell me that there is no solution. As you will see there is no duplicate points, thus Paraview cannot guess it. What is the best way to make them paraview-compliant? Add duplicate cells? Thanks. Julien 2010/1/27 Andy Bauer andy.ba...@kitware.com To be clear, I meant first use the group data set filter or merge block filter to put all of the cells in the same data set and then use the clean to grid filter to get rid of duplicate points. Points won't get merged if they are not within a certain distance from each other. So again the real problem isn't that all of the cells aren't in the same data set but the fact that the grid connectivity is not correct. If you are doing this in parallel this can also have an affect on appearance due to not having the correct connectivity between cells on different partitions/processors. If you can give me a more detailed description of the problem and send the grid I can take a closer look at it. Andy On Wed, Jan 27, 2010 at 10:04 AM, Julien Bodart julien.bod...@gmail.comwrote: Well, actually I think I tried all the filters, included the clean to grid one. In my case there is actually no duplicate point between files: for example: file-1, z-coord: 0.0,0.1,0.2 file-2, z-coord: 0.3,0.4,0.5 And the grid is structured. Maybe in this case there is no way to make a single dataset? 2010/1/27 Andy Bauer andy.ba...@kitware.com Try using the clean to grid filter. Although all of the cells are in the same data set (probably an unstructured grid), the filter does not realize that there are duplicate points and because of this the grid connectivity is probably not what you're expecting. Andy On Wed, Jan 27, 2010 at 8:03 AM, Julien Bodart julien.bod...@gmail.comwrote: Hi, I am new to Paraview, thanks to the new Netcdf Reader of 3.6 release. (Thank you very much for that) Therefore my problem is probably really trivial but I can't get it resolved... I am reading 2 or more netcdf file describing several part of the grid. The complete domain is a cube(rectilinear grid), sliced in a given number of files. There is no ghost cells so there is no obvious match between files. When I try to merge the different block (using the group dataset filter or merge block), I end up with a split domain, leading to a visual gap between each sub-domain, whether I am plotting contour , vertical plane or whatever. Is there a way to really merge those subdomain to end up with a single domain. Thanks in advance! Julien ___ 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 Follow this link to subscribe/unsubscribe: http://www.paraview.org/mailman/listinfo/paraview test.1.nc Description: Cdf file test.2.nc Description: Cdf file ___ 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 Follow this link to subscribe/unsubscribe: http://www.paraview.org/mailman/listinfo/paraview
Re: [Paraview] block merging using Paraview
Please keep the discussions on the mailing list so that others can contribute and benefit from the information. I think the best solution is to create a custom filter that stitches the two rectilinear grids together in the way you want. Most other solutions will convert your rectilinear grids to unstructured grids and thus use a lot more memory. Usually when you split a grid into multiple grids you'll get visual artifacts. Andy On Thu, Jan 28, 2010 at 12:12 PM, Julien Bodart julien.bod...@gmail.comwrote: I am more working on the first option. Actually those two files share a single uniform grid, so the space between the two blocks is exactly the cell size. (so in this simple case it is quite huge). The reverse question works as well: what happens if I split one single data file (with a rectilinear grid) in two files (with no connections), just two subsets and two subgrids, how to load them and see a single grid. In my case loading the two files gives you all the grid nodes and then all the needed information, but it looks like you have two different blocks. In a finite volume point of view, maybe it means adding one cell between the two blocks, but if the information is on the nodes like here, nothing more is needed. Your first solution works for me. I mean what you get using these simple files is exactly what I want. The problem there is the memory consumption (for example on my pc I can open two regular files using just 22% of the memory, the MergeBlock filters goes to 66% and then every action make paraview crash). It looks the brute force for something I was expecting to be just tricky. (no extra nodes needed) I hope it is more descriptive. 2010/1/28 Andy Bauer andy.ba...@kitware.com I'm still not completely understanding what you want done. Since the two data sets have significant space between them do you want to fill in that space with extra cells or do you want to translate one of the data sets to get rid of the space between? If you want to add in cells then it might be easiest to merge the data sets (GroupDataSet filter and then MergeBlocks filter like below) and then use the vtkDelauney3D filter to create a new grid that keeps the point data. If you want to translate one of the grids to get rid of the space between them you'll need to use something like the CleanToGrid filter to get an unstructured grid from your rectilinear grid. Then you can use the Transform filter to move it to the proper position (in this case -0.100148999 in the z direction for test.2.nc since the vtkCleantoGridFilter is quite finicky). Then use GroupDataSets filter to merge the data sets into a multiblock (right click on the GroupDataSets filter to select one of the test.*.nc files and the the Transform filter). Finally, you'll need to use the vtkCleantoGrid filter again to get the proper connectivity. You'll want to check what it does with the point data at the merged points though. If neither of these is what you want then you'll need to be very descriptive of what you hope to accomplish in order for me to help you any more. Andy On Thu, Jan 28, 2010 at 5:51 AM, Julien Bodart julien.bod...@gmail.comwrote: Andy, Thanks for your help. I have attached two simple files I am trying to merge. But looking at the problem, I am afraid you will tell me that there is no solution. As you will see there is no duplicate points, thus Paraview cannot guess it. What is the best way to make them paraview-compliant? Add duplicate cells? Thanks. Julien 2010/1/27 Andy Bauer andy.ba...@kitware.com To be clear, I meant first use the group data set filter or merge block filter to put all of the cells in the same data set and then use the clean to grid filter to get rid of duplicate points. Points won't get merged if they are not within a certain distance from each other. So again the real problem isn't that all of the cells aren't in the same data set but the fact that the grid connectivity is not correct. If you are doing this in parallel this can also have an affect on appearance due to not having the correct connectivity between cells on different partitions/processors. If you can give me a more detailed description of the problem and send the grid I can take a closer look at it. Andy On Wed, Jan 27, 2010 at 10:04 AM, Julien Bodart julien.bod...@gmail.com wrote: Well, actually I think I tried all the filters, included the clean to grid one. In my case there is actually no duplicate point between files: for example: file-1, z-coord: 0.0,0.1,0.2 file-2, z-coord: 0.3,0.4,0.5 And the grid is structured. Maybe in this case there is no way to make a single dataset? 2010/1/27 Andy Bauer andy.ba...@kitware.com Try using the clean to grid filter. Although all of the cells are in the same data set (probably an unstructured grid), the filter does not realize that there are duplicate points and because of this the
Re: [Paraview] block merging using Paraview
Thanks for your help and sorry for the mailing list. I will investigate the custom filters to get rid of the visual artefact. I still have your solution. I was just afraid to miss an obvious way to do it. Thanks again for your time. Julien 2010/1/28, Andy Bauer andy.ba...@kitware.com: Please keep the discussions on the mailing list so that others can contribute and benefit from the information. I think the best solution is to create a custom filter that stitches the two rectilinear grids together in the way you want. Most other solutions will convert your rectilinear grids to unstructured grids and thus use a lot more memory. Usually when you split a grid into multiple grids you'll get visual artifacts. Andy On Thu, Jan 28, 2010 at 12:12 PM, Julien Bodart julien.bod...@gmail.comwrote: I am more working on the first option. Actually those two files share a single uniform grid, so the space between the two blocks is exactly the cell size. (so in this simple case it is quite huge). The reverse question works as well: what happens if I split one single data file (with a rectilinear grid) in two files (with no connections), just two subsets and two subgrids, how to load them and see a single grid. In my case loading the two files gives you all the grid nodes and then all the needed information, but it looks like you have two different blocks. In a finite volume point of view, maybe it means adding one cell between the two blocks, but if the information is on the nodes like here, nothing more is needed. Your first solution works for me. I mean what you get using these simple files is exactly what I want. The problem there is the memory consumption (for example on my pc I can open two regular files using just 22% of the memory, the MergeBlock filters goes to 66% and then every action make paraview crash). It looks the brute force for something I was expecting to be just tricky. (no extra nodes needed) I hope it is more descriptive. 2010/1/28 Andy Bauer andy.ba...@kitware.com I'm still not completely understanding what you want done. Since the two data sets have significant space between them do you want to fill in that space with extra cells or do you want to translate one of the data sets to get rid of the space between? If you want to add in cells then it might be easiest to merge the data sets (GroupDataSet filter and then MergeBlocks filter like below) and then use the vtkDelauney3D filter to create a new grid that keeps the point data. If you want to translate one of the grids to get rid of the space between them you'll need to use something like the CleanToGrid filter to get an unstructured grid from your rectilinear grid. Then you can use the Transform filter to move it to the proper position (in this case -0.100148999 in the z direction for test.2.nc since the vtkCleantoGridFilter is quite finicky). Then use GroupDataSets filter to merge the data sets into a multiblock (right click on the GroupDataSets filter to select one of the test.*.nc files and the the Transform filter). Finally, you'll need to use the vtkCleantoGrid filter again to get the proper connectivity. You'll want to check what it does with the point data at the merged points though. If neither of these is what you want then you'll need to be very descriptive of what you hope to accomplish in order for me to help you any more. Andy On Thu, Jan 28, 2010 at 5:51 AM, Julien Bodart julien.bod...@gmail.comwrote: Andy, Thanks for your help. I have attached two simple files I am trying to merge. But looking at the problem, I am afraid you will tell me that there is no solution. As you will see there is no duplicate points, thus Paraview cannot guess it. What is the best way to make them paraview-compliant? Add duplicate cells? Thanks. Julien 2010/1/27 Andy Bauer andy.ba...@kitware.com To be clear, I meant first use the group data set filter or merge block filter to put all of the cells in the same data set and then use the clean to grid filter to get rid of duplicate points. Points won't get merged if they are not within a certain distance from each other. So again the real problem isn't that all of the cells aren't in the same data set but the fact that the grid connectivity is not correct. If you are doing this in parallel this can also have an affect on appearance due to not having the correct connectivity between cells on different partitions/processors. If you can give me a more detailed description of the problem and send the grid I can take a closer look at it. Andy On Wed, Jan 27, 2010 at 10:04 AM, Julien Bodart julien.bod...@gmail.com wrote: Well, actually I think I tried all the filters, included the clean to grid one. In my case there is actually no duplicate point between files: for example: file-1, z-coord: 0.0,0.1,0.2 file-2, z-coord: 0.3,0.4,0.5 And the grid is structured. Maybe
[Paraview] block merging using Paraview
Hi, I am new to Paraview, thanks to the new Netcdf Reader of 3.6 release. (Thank you very much for that) Therefore my problem is probably really trivial but I can't get it resolved... I am reading 2 or more netcdf file describing several part of the grid. The complete domain is a cube(rectilinear grid), sliced in a given number of files. There is no ghost cells so there is no obvious match between files. When I try to merge the different block (using the group dataset filter or merge block), I end up with a split domain, leading to a visual gap between each sub-domain, whether I am plotting contour , vertical plane or whatever. Is there a way to really merge those subdomain to end up with a single domain. Thanks in advance! Julien ___ 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 Follow this link to subscribe/unsubscribe: http://www.paraview.org/mailman/listinfo/paraview
Re: [Paraview] block merging using Paraview
Well, actually I think I tried all the filters, included the clean to grid one. In my case there is actually no duplicate point between files: for example: file-1, z-coord: 0.0,0.1,0.2 file-2, z-coord: 0.3,0.4,0.5 And the grid is structured. Maybe in this case there is no way to make a single dataset? 2010/1/27 Andy Bauer andy.ba...@kitware.com Try using the clean to grid filter. Although all of the cells are in the same data set (probably an unstructured grid), the filter does not realize that there are duplicate points and because of this the grid connectivity is probably not what you're expecting. Andy On Wed, Jan 27, 2010 at 8:03 AM, Julien Bodart julien.bod...@gmail.comwrote: Hi, I am new to Paraview, thanks to the new Netcdf Reader of 3.6 release. (Thank you very much for that) Therefore my problem is probably really trivial but I can't get it resolved... I am reading 2 or more netcdf file describing several part of the grid. The complete domain is a cube(rectilinear grid), sliced in a given number of files. There is no ghost cells so there is no obvious match between files. When I try to merge the different block (using the group dataset filter or merge block), I end up with a split domain, leading to a visual gap between each sub-domain, whether I am plotting contour , vertical plane or whatever. Is there a way to really merge those subdomain to end up with a single domain. Thanks in advance! Julien ___ 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 Follow this link to subscribe/unsubscribe: http://www.paraview.org/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 Follow this link to subscribe/unsubscribe: http://www.paraview.org/mailman/listinfo/paraview
Re: [Paraview] block merging using Paraview
To be clear, I meant first use the group data set filter or merge block filter to put all of the cells in the same data set and then use the clean to grid filter to get rid of duplicate points. Points won't get merged if they are not within a certain distance from each other. So again the real problem isn't that all of the cells aren't in the same data set but the fact that the grid connectivity is not correct. If you are doing this in parallel this can also have an affect on appearance due to not having the correct connectivity between cells on different partitions/processors. If you can give me a more detailed description of the problem and send the grid I can take a closer look at it. Andy On Wed, Jan 27, 2010 at 10:04 AM, Julien Bodart julien.bod...@gmail.comwrote: Well, actually I think I tried all the filters, included the clean to grid one. In my case there is actually no duplicate point between files: for example: file-1, z-coord: 0.0,0.1,0.2 file-2, z-coord: 0.3,0.4,0.5 And the grid is structured. Maybe in this case there is no way to make a single dataset? 2010/1/27 Andy Bauer andy.ba...@kitware.com Try using the clean to grid filter. Although all of the cells are in the same data set (probably an unstructured grid), the filter does not realize that there are duplicate points and because of this the grid connectivity is probably not what you're expecting. Andy On Wed, Jan 27, 2010 at 8:03 AM, Julien Bodart julien.bod...@gmail.comwrote: Hi, I am new to Paraview, thanks to the new Netcdf Reader of 3.6 release. (Thank you very much for that) Therefore my problem is probably really trivial but I can't get it resolved... I am reading 2 or more netcdf file describing several part of the grid. The complete domain is a cube(rectilinear grid), sliced in a given number of files. There is no ghost cells so there is no obvious match between files. When I try to merge the different block (using the group dataset filter or merge block), I end up with a split domain, leading to a visual gap between each sub-domain, whether I am plotting contour , vertical plane or whatever. Is there a way to really merge those subdomain to end up with a single domain. Thanks in advance! Julien ___ 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 Follow this link to subscribe/unsubscribe: http://www.paraview.org/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 Follow this link to subscribe/unsubscribe: http://www.paraview.org/mailman/listinfo/paraview
