Hi I am new to Paraview Can you help
I have data in a CSV spreadsheet. It contains the xyz point coordinates of a 3D shape (20,000+ nodes). The file also contains the triangulation coordinates in 3 separate columns for these nodes (40000 + triangulations). These create the faces of the mesh I can work out how to plot the points, using Filter—Table to points. How do I plot the faces? Do the 3 columns need to be turned into an array? And how do I colour the faces or contour them by another value (called "bi" in the spreadsheet) here is an example of the spreadsheet nn = node number the 3d coordinates of the points are x, y, z and the faces of the mesh are specified by (XYZ) I WISH TO PLOT Points (x, y, x) , draw faces (XYZ) colour by “bi" in matlab it would be trisurf(Tri,X,Y,Z,C) where Tri = array(XYX) X,Y,Z = (x, y, z) c= "bi" nn x y z X Y Z uni bi 0 39.527 28.202 160.219 3435 19658 2764 3.86942 0.74871 1 70.804 -2.966 157.578 3161 17204 9466 6.64361 0.78373 2 48.982 -25.674 109.022 18424 17467 16955 5.02491 1.0451 3 83.514 -9.096 120.988 13600 19721 2669 4.47977 0.9348 4 -16.04 -39.749 188.467 1564 10099 10091 1.90873 0.73286 5 74.526 -3.096 174.347 21598 19018 21205 8.4263 0.70594 6 54.93 -56.347 151.496 21283 11341 18399 7.53334 2.17128 7 56.936 -20.131 186.177 1171 2723 20833 7.16118 1.44875 8 -14.627 -47.1 162.185 51 15729 15865 2.13939 0.70887 9 38.207 -59.201 147.993 9331 5851 9106 5.83457 4.32971 10 50.645 -32.04 110.418 310 3513 9121 5.3741 1.14543 Neil Srinivasan iPhone > On 7 Feb 2016, at 10:15 a.m., Richardson CFD <[email protected]> wrote: > > Kenneth, wonderful - that's done the trick (see attached). > A quick and simple solution! > > Whats the difference between an image file (and the unstructured data file > that I have created)? > > Thanks very much, Giles. > >> On Sun, Feb 7, 2016 at 6:31 AM, Moreland, Kenneth <[email protected]> wrote: >> Giles, >> >> I think I've figured out your problem. The scalars data you sent me is an >> unstructured grid with "voxel"-type cells. One of my least favorite features >> of VTK is that there is a distinction between a box in an unstructured grid >> (called a hexahedra) and a box in a data set with structured grid (called a >> voxel). These two cells are essentially the same shape, but the order of the >> points is different. >> >> The reason why I dislike this feature is that it is technically allowable to >> put voxel cells in an unstructured grid. However, this fouls up lots of >> filters that don't check for this corner case. Apparently the probe filter, >> which is the underlying filter for resample with dataset, is one of the >> filters broken for voxels. (Unless there is something else about this >> dataset that I am missing.) I submitted a bug about this >> (http://www.paraview.org/Bug/view.php?id=15982). >> >> The most expedient way around this problem is to run the tetrahedralize >> filter on the scalars. That will convert the voxels to tetrahedra correctly, >> and the probe filter has no problem on that data type. The interpolation >> will be slightly different but close. Overall a better solution is to save >> your data as image data rather than convert it to an unstructured grid. The >> file will be smaller and the interpolation should happen correctly. >> >> -Ken >> >> From: Richardson CFD <[email protected]> >> Date: Saturday, February 6, 2016 at 5:54 AM >> To: "[email protected]" <[email protected]>, Kenneth Moreland >> <[email protected]> >> Subject: [EXTERNAL] mapping scalars onto surface geometry >> >> Kenneth, >> >> I have made two files here available for download (sphere.stl and >> scalars.vtk). >> >> https://drive.google.com/file/d/0B4bNbYR3XwvQVlBZNlVBX0RXSkU/view?usp=sharing >> >> https://drive.google.com/file/d/0B4bNbYR3XwvQTkJxRDhLb0MxZGc/view?usp=sharing >> >> I hope you can give these a try using "Resample with Dataset" to see what >> the problem is. >> >> Regards Giles. >> This email has been sent from a virus-free computer protected by Avast. >> www.avast.com > > <Capture2.PNG> > _______________________________________________ > 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
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