Visualization with ParaView

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1 Visualization with ParaView

2 Before we begin Make sure you have ParaView installed so you can follow along in the lab section

3 Background Open-source, multi-platform parallel data analysis and visualization application Mature, feature-rich interface Good for general-purpose, rapid visualization Built upon the Visualization ToolKit (VTK) library Primary contributors: Kitware, Inc. Sandia National Laboratory Los Alamos National Laboratory Army Research Laboratory

Mature, feature-rich interface Good for general-purpose, rapid visualization Built upon

Data Types Supports a wide variety of data types Structured grids uniform rectilinear, non-uniform rectilinear, and curvilinear Unstructured grids Polygonal data Images Multi-block AMR Time series

4 Data Types Supports a wide variety of data types Structured grids uniform rectilinear, non-uniform rectilinear, and curvilinear Unstructured grids Polygonal data Images Multi-block AMR Time series support * * 1.3. MORE INFORMATION U ns Uns poin and poly repr whic In addition to these basic data block data. A basic multi-block are grouped together or whenever a ParaView also has some special da A daptive M esh Refinement (A Oct ree, Tablular, and Graph typ

5 Visualization Algorithms Supports a wide variety of visualization algorithms -> Filters Isosurfaces Cutting planes Streamlines Glyphs Volume rendering Clipping Height maps

6 Special Features Supports derived variables New scalar / vector variables that are functions of existing variables in your data set Scriptable via Python Saves animations Can run in parallel / distributed mode for large data visualization

in your data set Scriptable via Python Saves animations Can

7 Data Formats Supports a wide variety of data formats VTK ( EnSight Plot3D Various polygonal formats Users can write data readers to extend support to other formats Conversion to the VTK format is straightforward

pdf) EnSight Plot3D Various polygonal formats Users can write

8 Data Formats VTK Simple Legacy Format ASCII or binary Supports all VTK grid types Easiest for data conversion Note: use VTK XML format for parallel I/O VTK simple legacy format (

Note: use VTK XML format for parallel I/O VTK simple

9 Data Formatting Example Data set: 4x4x4 rectilinear grid with one scalar variable

10 Visualization Pipeline All processing operations (filters) produce data sets Can further process the result of every operation to build complex visualizations e.g. can extract a cutting plane, and apply glyphs (i.e. vector arrows) to the result Gives a plane of glyphs through your 3D volume

11 Demonstration WRF weather forecast data set Rectilinear grid Multiple scalar and vector variables Time series Can show: Clouds Wind Temperature

13 Test-Drive

14 Getting Started Download example data file disk_out_ref.ex2 Right-click, Save link as Open ParaView

15 (well, this is a Mac) ParaView Menu Bar Toolbars Pipeline Browser Object Inspector 3D View

16 Undo/Redo Camera Controls View Controls (undo/redo) VCR Controls Common Controls Active Variable Controls

17 Today we will: Create isosurfaces for a scalar variable Clip and slice the surfaces Use glyphs to display a vector field Use streamlines to show flow through a vector field Edit color maps Add slices to show variable values over a plane Add color legends Create volume rendering Create a plot over a line

through a vector field Edit color maps Add slices to show variable values

18 Open the file disk_out_ref.ex2 Click File -> Open Select disk_out_ref.ex2 Click OK Select ALL variables Click blue Apply Cylinder outline of dataset extent displayed

19 Open the file disk_out_ref.ex2 Click File -> Open Select disk_out_ref.ex2 and click OK

20 Open the file disk_out_ref.ex2 Click File -> Open Select disk_out_ref.ex2 and click OK Select ALL variables

21 Open the file disk_out_ref.ex2 Click File -> Open Select disk_out_ref.ex2 Click OK Select ALL variables Click blue Apply

22 Open the file disk_out_ref.ex2 Click File -> Open Select disk_out_ref.ex2 Click OK Select ALL variables Click blue Apply Cylinder outline of dataset extent displayed

23 Manipulate Representation and color Use the Active Variable Controls to change color Solid Color -> Pres

24 Manipulate Representation and color Use the Active Variable Controls to change color Solid Color -> Pres

25 Manipulate Representation and color Use the Active Variable Controls to change color Solid Color -> Pres Use Representation toolbar to change representation Surface -> Surface With Edges

26 Manipulate Representation and color Use the Active Variable Controls to change color Solid Color -> Pres Use Representation toolbar to change representation Surface -> Surface With Edges

27 Manipulate Representation and color Use the Active Variable Controls to change color Solid Color -> Pres Use Representation toolbar to change representation Surface -> Surface With Edges Show Colorbar annotation

28 Manipulate Representation and color Use the Active Variable Controls to change color Solid Color -> Pres Use Representation toolbar to change representation Surface -> Surface With Edges Show Colorbar annotation

29 Explore dataset with mouse Click +Z view button

30 Explore dataset with mouse Click +Z view button Huh?

31 Explore dataset with mouse Click +Z view button Huh? Move it around

32 Explore dataset with mouse Click +Z view button Huh? Move it around Change Representation

33 Filters Click Filters on menu bar and find Contour Alphabetical Common (Or on toolbar)

34 Filters Click Filters on menu bar and find Contour Alphabetical Common (Or on toolbar) Contour by AsH3

35 Filters Click Filters on menu bar and find Contour Alphabetical Common (Or on toolbar) Contour by AsH3 Hit Apply

36 Filters With Contour1 selected, use Active Variable Control to color by CH4 And drag one of the colorbars elsewhere

37 Filters With Contour1 selected, use Active Variable Control to color by CH4 And drag one of the colorbars elsewhere

38 Filters (2) Click Filters on menu bar and find Clip Alphabetical Common (Or on toolbar)

39 Filters (2) Choose orientation axes

40 Filters (2) Hit Apply Note: all three objects are visible Wireframe of dataset Contour surface Surface of clipped dataset

41 Color Mapping Select Clip1

42 Color Mapping Select Edit Color Map

43 Color Mapping Select Edit Color Map

44 Color Mapping Select Choose Preset

45 Color Mapping Select Choose Preset

46 Color Mapping Select Black-Body R and Update

47 Color Mapping Select Black-Body R and Close

48 Color Mapping Close Colormap window

49 Filters (3) Select original dataset Click Filters on menu bar and find Stream Tracer Alphabetical Common (Or on toolbar)

50 Filters (3) Scroll down on Properties pane until you see seeds sub-pane

51 Filters (3) Change Point Source to High Resolution Line Source Update

52 Filters (3) You can manipulate the rake interactively You can change the number of seed points You can change the interpolation method yadda yadda

53 Filters (3) With StreamTracer1 selected, Click Filters on menu bar and find Tube Alphabetical? Update

54 Filters (3) ParaView

55 Filters (3) Turn on Wire Frame of original dataset Hide Tube d Stream lines

56 Glyphs With original dataset selected Click Filters on menu bar and find Glyph Alphabetical Common (Or on toolbar) Apply

57 Glyphs A bunch of points are selected, sampled from the dataset and an Arrow glyph is applied Note V vectors and Arrow glyph type; Scalars option is not enabled

58 Glyphs Scroll down in properties window and change Scale Mode to scalar Scroll back Set Glyph Type to sphere Choose any variable and Apply

59 Glyphs Spheres radii are proportional to value or magnitude

60 Glyphs With the Glyphs selected Edit->Change Input

61 Glyphs Select the Stream Trace, Apply

62 Glyphs Note dependency tree With the Glyph selected, change Scale Mode to Vector, Glyph Type to Arrow, and choose variable v Apply

63 Glyphs Glyphs are now tangential arrows

64 Volume Rendering Delete everything except original dataset Set Representation to Volume

65 Volume Rendering Open Colormap Editor Fiddle Opacity Transfer Function

66 Volume Rendering to look like this Close Colormap Editor

67 Volume Rendering And we can then add a new contour, streamlines, yadda yadda

68 Volume Rendering Notice smallwrf directory Enter it

69 Animation Notice wrf_small-.vtr Expand it and see that it consists of a number of sequentially ordered files Select it and Apply

70 Animation Notice wrf_small-.vtr Expand it and see that it consists of a number of sequentially ordered files Select it and Apply

71 Animation Select Contour Contour By: QRAIN Set Value Range Apply Hit Play

72 Saving Animation File->Save Animation Set output resolution Hit Save Animation

73 Saving Animation Create Directory e.g. movie1 Enter that directory

74 Saving Animation Set File Name e.g. frame Set Files to Type I use avi OK

75 Questions? More tutorials available:

Visualization with ParaView. Greg Johnson

Visualization with ParaView. Greg Johnson Visualization with Greg Johnson Before we begin Make sure you have 3.8.0 installed so you can follow along in the lab section http://paraview.org/paraview/resources/software.html http://www.paraview.org/