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Tutorial / Practice Session

Tutorial / Practice Session. Randy Hudson hudson@mcs.anl.gov Argonne National Laboratory Flash Center, University of Chicago. Tutorial / practice. Sample dataset Tutorial: ParaView 2.4.4. Sample dataset. 3d Rayleigh-Taylor instability Scalar data set Vector data set

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Tutorial / Practice Session

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  1. Tutorial / Practice Session Randy Hudson hudson@mcs.anl.gov Argonne National Laboratory Flash Center, University of Chicago

  2. Tutorial / practice • Sample dataset • Tutorial: ParaView 2.4.4

  3. Sample dataset • 3d Rayleigh-Taylor instability • Scalar data set • Vector data set • Components as scalars

  4. ParaView • For this talk: single, local process • Often in practice: client-server mode • Built upon VTK • VTK is built upon OpenGL

  5. ParaView • About • Using

  6. About ParaView • Free, open-source • Documentation • Features • Architectures • Support

  7. ParaView: documentation • Book • URL: http://www.kitware.com/products/paraviewguide.html • Current version: 2.4 • $76 • Tutorials • How to extend ParaView • User and developer guides • Wiki • http://paraview.org/Wiki/ParaView • Can be helpful

  8. ParaView: features • 2d & 3d • Meshes • Structured & unstructured • Directly: Paramesh-like AMR • Regular grids • Client-server…if you want • Data processing, rendering, UI can all be on different machines • Rendering: parallel-remote or singular-local, as needed or demanded • Also singular and local • Everything local • Rendering done by whatever graphics hardware is available on client

  9. ParaView: architectures • Windows • Linux - x86 • OSX • Or, try building from source

  10. ParaView: support • Mailing list • ParaView users: paraview@paraview.org • URL: http://public.kitware.com/mailman/listinfo/paraview • Archived at http://public.kitware.com/pipermail/paraview/ • Searchable at http://www.kitware.com/search.html

  11. ParaView • Starting ParaView • Settings • Opening files • Reading data • Visualizing data • Colormapping • Quantitative analysis • Writing output • Client-server

  12. Starting ParaView (GUI) • OSX, Linux, Unix • Set PATH to paraview directory • Run paraview (unless client-server) where you want • However • ParaView usually remembers its last directory • ParaView has failed to find init.tcl if I start it just anywhere • Windows • Click on ParaView icon • Non-GUI alternate: Tcl batch scripts

  13. Some settings • General • My recommendations (what works for me) • Annotation • Camera • Application settings • Keyframe animation

  14. General • Menu: View  3D View Properties • Generaltab

  15. General • General panel • I recommend beginning with these settings. • I usually get better performance • Caveat: your experience may vary

  16. Annotation • Menu: View  3D View Properties • Annotatetab

  17. Annotation

  18. Camera • Menu: View  3D View Properties • Cameratab

  19. Camera

  20. Application settings • Menu: View  Application Settings

  21. Keyframe animation • Menu: View  Keyframe Animation

  22. Opening files - with extension • Menu: File  Open file … • In Open ParaView File panel • Choose directory • Double-click file name

  23. Opening files - no extension • Menu: File  Open file … • In Open ParaView File panel • Choose directory • Choose a FLASH file type • Double-click file name

  24. Opening files - no extension • InOpen Error panel • Click OK button • InOpen Data With… panel • Double-click the FLASH file type

  25. Opening files - note • ParaView 2.4.4 does not read FITS files. One might read a FITS file in VisIt, export the database to a format ParaView can read (VTK, e.g.) and read that. • It might be that another “binary + header” format could be used for the data…perhaps the “brick of values” (BOV) format.

  26. Reading data • Select variables • Click on Accept

  27. Filters Transformations applied to data sets Data sets Input files or the output of filters Visualizing data

  28. Visualizing data • Scalar data • Cut Plane • Isosurface • Colored by same variable • Colored by other variable

  29. Scalar data - cut plane • Click cut plane button • Select plane settings • Click Accept

  30. Click Display tab Select variable Check Scalar bar and Cube Axes Scalar data - cut plane

  31. Scalar data - isosurface • Click contour button • Select variable • Select contour settings • Click Accept

  32. Click Display tab Select same variable Check Scalar bar and Cube Axes Isosurface - same variable

  33. Click Display tab Select different variable Check Scalar bar and Cube Axes Isosurface -other variable

  34. Visualizing data • Vector data • (Define vector from input scalars) • Glyphs • Streamlines • As lines • As tubes

  35. Menu: Filter  Calculator Define <vectorvarname> with expression ClickAccept Vector data - define vector

  36. Menu: Filter  Glyph Select glyph settings Click Accept Vector data - glyphs

  37. Vector data - glyphs

  38. Menu: Filter  Stream Tracer Select streamline settings Click Accept Streamlines - as lines

  39. Streamlines - as lines

  40. Streamlines - as tubes • Create streamlines as lines • Menu: Filter  Tube

  41. Colormapping • You can change the mapping of the data to the given color table, but can only change the table in limited ways

  42. Data analysis • Probe filter: interpolate data to world coordinates • Pick filter: nearest data cell or point • Data analyis filter • Samples at points • Probe filter: world point • Pick filter: nearest data set point • Samples in cells • Pick filter: nearest data set cell • Samples along lines • Probe filter: world points

  43. Data analysis - Probe filter • Point • Menu: Filter  Probe • SelectPointin Probe Object panel • Center the point • ClickAccept • Data appears below • (Can also plot point)

  44. Data analysis - Probe filter • Line • Menu: Filter  Probe • SelectLinein Probe Object panel • Place the line • ClickShow X-Y Plot • ClickAccept • Data appears in plot

  45. Data analysis - Pick filter • Cell • Menu: Filter  Pick • Select Cell • SelectWorld Pointin Pick Method panel • Center the sample point • ClickAccept • Data appears below • (Can also plot point)

  46. Data analysis - Pick filter • Point • Menu: Filter  Pick • Select Point • SelectWorld Pointin Pick Method panel • Center the sample point • ClickAccept • Data appears below • (Can also plot point)

  47. Data analysis • Alternate placement of probe • Move mouse pointer over data (the isosurface, here) • Press P key

  48. Data analysis filter • Combines Pick & Probe filters

  49. Mesh analysis • Information panel • Memory use • Number of graphical elements • Data ranges

  50. Mesh analysis • Filters • Curvature • Mesh quality

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