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How can I create stream lines in Voxler via automation?

This article contains a sample script for loading a test lattice, adding a streamlines module to it, and then changing all the properties of the streamlines module.

To run this script:

  1. Copy the script below, or click here to download the BAS file: StreamlinesModule.bas.
  2. In a Windows Explorer window, navigate to C:\Program Files\Golden Software\Voxler 4\Scripter.
  3. Double click on Scripter.exe to launch Scripter.
  4. Press Ctrl+A to select all of the existing lines then press Delete.
  5. If you copied this script, press Ctrl+V to paste it into Scripter. If you downloaded it, click File | Open, select the BAS file from your downloads directory, and click Open.
  6. Click Script | Run to run the script.
     

*********

'********************************************************************************************
' StreamlinesModule.bas
' This script loads a test lattice and adds a streamlines module to it.
' It then changes all the properties of the streamlines module.
'********************************************************************************************

' If Voxler is running, retrieve the current instance of Voxler.  Otherwise,
' create a new instance of Voxler.
Function VoxlerApplication()
   On Error Resume Next
   Set VoxlerApplication = GetObject(, "Voxler.Application")
   If Err.Number <> 0 Then
      Set VoxlerApplication = CreateObject("Voxler.Application")
   End If
   On Error GoTo 0
End Function

Sub Main
 'Retrieve running instance of Voxler or create a new instance of Voxler
  Dim VoxlerApp As Object
  Set VoxlerApp = VoxlerApplication()

 'Make Voxler visible
  VoxlerApp.Visible = True

 'Access CommandApi
  Set CommandApi = VoxlerApp.CommandApi

 'Create a new Voxler document
  CommandApi.Construct ("New")
  CommandApi.DoOnce()

 'Load the test lattice
  CommandApi.Construct("CreateModule")
  CommandApi.Option ("Type", "TestLattice")
  CommandApi.Do()

 'Add a streamlines module
  CommandApi.Construct("CreateModule")
  CommandApi.Option ("AutoConnect", "True")
  CommandApi.Option ("SourceModule", "TestLattice")
  CommandApi.Option ("Type", "StreamLines")
  CommandApi.Do()

 'Change the StreamLinesStreamMethod
 '0, 1, or 2 for Points, Spheres, or Lines
  CommandApi.Construct("ModifyModule")
  CommandApi.Option ("Module", "StreamLines")
  CommandApi.Option ("StreamLinesStreamMethod", "0")
  CommandApi.Do()

 'Turn on or off the AutoCalc Step Interval feature
  CommandApi.Option ("StreamLinesAutoStep", "True")
  CommandApi.Do()

 'Change the Step Interval
  CommandApi.Option ("StreamLinesStepSize", "0.3")
  CommandApi.Do()

 'Change the Number of Steps
  CommandApi.Option ("StreamLinesNumSteps", "50")
  CommandApi.Do()

 'Change the Point Size
 'This option is only available when StreamLinesStreamMethod is set to 0
 'Varies between 0 and 48
  CommandApi.Option ("StreamLinesPointSize", "2")
  CommandApi.Do()

 'Change the Sphere Size
 'This option is only available when StreamLinesStreamMethod is set to 1
 'Varies from 0 to 1
  CommandApi.Option ("StreamLinesSphereSize", "0.1")
  CommandApi.Do()

 'Change the Sphere Quality
 'This option is only available when StreamLineStreamMethod is set to 1
 'Varies from 0 to 1, 1 is high quality
  CommandApi.Option ("StreamLinesSphereQuality", "0.8")
  CommandApi.Do()

 'Change the line width
 'This option is only available when StreamLineStreamMethod is set to 2
 'Varies between 0 and 4
  CommandApi.Option ("StreamLinesLineWidth", "2.1")
  CommandApi.Do()

 'Change the direction streamlines are traced from the seed point
 'Options are 0, 1, or 2 - Forward, Backward, or Both
  CommandApi.Option ("StreamLinesDirection", "1")
  CommandApi.Do()

 'Change the Minimum velocity
  CommandApi.Option ("StreamLinesMinVelocity", "0.2")
  CommandApi.Do()

 'Change the Color Method to Fixed
  CommandApi.Option ("StreamLinesColorMethod","0")
  CommandApi.Do()

 'Change the Fixed color to Desert Blue
  CommandApi.Option ("StreamLinesColor", "Desert Blue")
  CommandApi.Do()

 Wait (2)

 'Change the Color Method to Fixed
  CommandApi.Option ("StreamLinesColorMethod","1")
  CommandApi.Do()

 'Change the color map
  CommandApi.Option ("StreamLinesColormap", "Rainbow")
  CommandApi.Do()

 'Change the line seed method
 'Value is 0, 1, 2, 3 for Line, Ring, Square, or Point Set
 'If PointSet, must have another input containing the points
  CommandApi.Option ("StreamLinesSeedMethod","2")
  CommandApi.Do()

 'Change the number of seeds
  CommandApi.Option ("StreamLinesNumSeeds", "54")
  CommandApi.Do()

 'Change the X component of the normal
  CommandApi.Option ("StreamLinesXNormal", "30")
  CommandApi.Do()

 'Change the Y component of the normal
  CommandApi.Option ("StreamLinesYNormal", "30")
  CommandApi.Do()

 'Change the Z component of the normal
  CommandApi.Option ("StreamLinesZNormal", "45")
  CommandApi.Do()

 'Change the X position of the seed point center
  CommandApi.Option ("StreamLinesXPos", "0.7")
  CommandApi.Do()

 'Change the Y position of the seed point center
  CommandApi.Option ("StreamLinesYPos", "0.2")
  CommandApi.Do()

 'Change the Z position of the seed point center
  CommandApi.Option ("StreamLinesZPos", "0.6")
  CommandApi.Do()

 'Change the X Scale factor of the seed plane
  CommandApi.Option ("StreamLinesXScale", "7")
  CommandApi.Do()

 'Change the Y Scale factor of the seed plane
  CommandApi.Option ("StreamLinesYScale", "2")
  CommandApi.Do()

 'Show or hide the seed plane dragger
  CommandApi.Option ("StreamLinesShowDragger", "True")
  CommandApi.Do()

Wait (2)

 'Reset the seed plane to the default
  CommandApi.Option ("StreamLinesResetDragger", "True")
  CommandApi.Do()

 'Display the StreamLines legend
  CommandApi.Option ("StreamLinesLegendEnable", "True")
  CommandApi.Do()

 'Change the legend orientation
 '0 is for horizontal, 1 is for vertical
  CommandApi.Option ("StreamLinesLegendOrientation", "0")
  CommandApi.Do()

 'Change the legend X position
 'Ranges from 0-1
  CommandApi.Option ("StreamLinesLegendXPos", "0.3")
  CommandApi.Do()

 'Change the legend Y position
 'Ranges from 0-1
  CommandApi.Option ("StreamLinesLegendYPos", "0.9")
  CommandApi.Do()

 'Change the legend width
 'Ranges from 0-200
  CommandApi.Option ("StreamLinesLegendWidth", "20")
  CommandApi.Do()

 'Change the legend length
 'Ranges from 0-1024
  CommandApi.Option ("StreamLinesLegendLength", "400")
  CommandApi.Do()

 'Change the legend title
  CommandApi.Option ("StreamLinesLegendTitle", "Legend Title")
  CommandApi.Do()

 'Change the legend title font size
 'Ranges from 4-72
  CommandApi.Option ("StreamLinesLegendTitleHeight", "20")
  CommandApi.Do()

 'Change the number of labels displayed in a legend
  CommandApi.Option ("StreamLinesLegendNumLabels", "3")
  CommandApi.Do()

 'Change the legend to use custom labels
  CommandApi.Option ("StreamLinesLegendUseCustomLabels", "True")
  CommandApi.Do()

 'Set the custom labels for the legend
  CommandApi.Option ("StreamLinesLegendCustomLabels", "1.7:low, 2.1:medium, 2.9:intermediate, 3.2:elevated, 3.7:high")
  CommandApi.Do()

 'Set the height for the legend labels
  CommandApi.Option ("StreamLinesLegendLabelHeight", "8")
  CommandApi.Do()

 'Set the label format type for the legend
  CommandApi.Option ("StreamLinesLabelFormatType", "0")
  CommandApi.Do()

 'Set the number of digits to display on the labels
  CommandApi.Option ("StreamLinesLabelFormatNumDigits", "2")
  CommandApi.Do()

 'Set the legend label prefix
  CommandApi.Option ("StreamLinesLabelFormatPrefix", "pre-")
  CommandApi.Do()

 'Set the legend label postfix
  CommandApi.Option ("StreamLinesLabelFormatPostfix", "-post")
  CommandApi.Do()

 'Set the legend font
  CommandApi.Option ("StreamLinesLegendFont", "Arial")
  CommandApi.Do()

 'Turn on or off antialiasing for the legend
  CommandApi.Option ("StreamLinesLegendAntialias", "True")
  CommandApi.Do()

 'Set the line and text color for the legend
  CommandApi.Option ("StreamLinesLegendFGColor", "Blue")
  CommandApi.Do()

 'Set the background color for the legend
  CommandApi.Option ("StreamLinesLegendBGColor", "10% Gray")
  CommandApi.Do()

 'Turn on or off the display of the legend background
  CommandApi.Option ("StreamLinesLegendShowBackground", "True")
  CommandApi.Do()

End Sub

 

Updated November 3, 2016

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