Immersive Visualization / IQ-Station Wiki
This site hosts information on virtual reality systems that are geared toward scientific visualization, and as such often toward VR on Linux-based systems. Thus, pages here cover various software (and sometimes hardware) technologies that enable virtual reality operation on Linux.
The original IQ-station effort was to create low-cost (for the time) VR systems making use of 3DTV displays to produce CAVE/Fishtank-style VR displays. That effort pre-dated the rise of the consumer HMD VR systems, however, the realm of midrange-cost large-fishtank systems is still important, and has transitioned from 3DTV-based systems to short-throw projectors.
Difference between revisions of "ParaView Tips"
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This page will have a handful of ParaView tricks that I find handy, and will probably want to make use of in the future. | This page will have a handful of ParaView tricks that I find handy, and will probably want to make use of in the future. | ||
= | =Basic Python Shell Interaction w/ Pipeline= | ||
* Load a Wavelet source | |||
* View the Python Shell | |||
* Interact in the shell | |||
For example: | |||
<syntaxhighlight lang="python"> | |||
>>> c = Contour() | |||
>>> w = FindSource("Wavelet1") | |||
>>> w | |||
<paraview.servermanager.Wavelet object at 0x1269c7b50> | |||
>>> w.GetDataInformation() | |||
<paraview.servermanager.DataInformation object at 0x1269c71d0> | |||
>>> # go to the information tab to get some info | |||
>>> w.GetDataInformation().GetNumberOfCells() | |||
8000L | |||
>>> pd = w.GetPointDataInformation() | |||
>>> pd | |||
<paraview.servermanager.FieldDataInformation object at 0x1269c73d0> | |||
>>> pd.keys() | |||
['RTData'] | |||
>>> pd["RTData"].GetName() | |||
'RTData' | |||
>>> pd["RTData"].GetNumberOfComponents() | |||
1 | |||
>>> pd["RTData"].GetComponentRange(0) | |||
(37.353103637695312, 276.82882690429688) | |||
>>> r = pd["RTData"].GetComponentRange(0) | |||
>>> c.Isosurfaces = [(r[0]+r[1])/2] | |||
>>> Show() | |||
<paraview.servermanager.GeometryRepresentation object at 0x125dfe210> | |||
>>> Render() | |||
<paraview.servermanager.RenderView object at 0x125dd3e50> | |||
</syntaxhighlight> | |||
=Manipulate Camera in Python (shell or script)= | |||
Simple commands to affect the camera: | |||
<syntaxhighlight lang="python"> | |||
>>> c = GetActiveCamera() | |||
>>> c.Roll(10) | |||
>>> Render() | |||
<paraview.servermanager.RenderView object at 0x125dd3e50> | |||
>>> c.Roll(10) | |||
>>> c.Azimuth(10) | |||
>>> Render() | |||
<paraview.servermanager.RenderView object at 0x125dd3e50> | |||
</syntaxhighlight> | |||
=Write the rendering to a file (shell or script)= | |||
One-liner to write the current rendering: | |||
<syntaxhighlight lang="python"> | |||
>>> WriteImage("/tmp/foo.png") | |||
</syntaxhighlight> | |||
<!-- = In 2013 I have some camera and Animation examples = (It's where I was figuring out the stereoscopic batch rendering)--> | |||
=Stereoscopic Batch rendering= | |||
I gave a talk on the ins and outs of ParaView stereoscopic batch rendering: | |||
* [https://www.tacc.utexas.edu/documents/10165/1147324/02+Creating+Animations+with+Paraview.pdf/51d89121-5610-4dd0-bbec-eef15df5cd38 SuperComputing 2014 talk on stereo animation batch rendering] | |||
Here's my main example of creating a "pvbatch" to render a stereo pair of images. | Here's my main example of creating a "pvbatch" to render a stereo pair of images. | ||
Line 60: | Line 120: | ||
WriteAnimation("TCollision_02_R/tcollision_02_V3A_R.png") | WriteAnimation("TCollision_02_R/tcollision_02_V3A_R.png") | ||
</syntaxhighlight> | </syntaxhighlight> | ||
=See Also= | |||
Links to other interesting ParaView pages with tips & tutorials: | |||
* [https://cvw.cac.cornell.edu/paraview-adv Cornell Advanced ParaView Tutorial] | |||
* [https://www.youtube.com/watch?v=OeG0XPv3eZw Combine ParaView with MatPlotLib] (Youtube) |
Latest revision as of 20:22, 19 May 2024
This page will have a handful of ParaView tricks that I find handy, and will probably want to make use of in the future.
Basic Python Shell Interaction w/ Pipeline
- Load a Wavelet source
- View the Python Shell
- Interact in the shell
For example:
>>> c = Contour()
>>> w = FindSource("Wavelet1")
>>> w
<paraview.servermanager.Wavelet object at 0x1269c7b50>
>>> w.GetDataInformation()
<paraview.servermanager.DataInformation object at 0x1269c71d0>
>>> # go to the information tab to get some info
>>> w.GetDataInformation().GetNumberOfCells()
8000L
>>> pd = w.GetPointDataInformation()
>>> pd
<paraview.servermanager.FieldDataInformation object at 0x1269c73d0>
>>> pd.keys()
['RTData']
>>> pd["RTData"].GetName()
'RTData'
>>> pd["RTData"].GetNumberOfComponents()
1
>>> pd["RTData"].GetComponentRange(0)
(37.353103637695312, 276.82882690429688)
>>> r = pd["RTData"].GetComponentRange(0)
>>> c.Isosurfaces = [(r[0]+r[1])/2]
>>> Show()
<paraview.servermanager.GeometryRepresentation object at 0x125dfe210>
>>> Render()
<paraview.servermanager.RenderView object at 0x125dd3e50>
Manipulate Camera in Python (shell or script)
Simple commands to affect the camera:
>>> c = GetActiveCamera()
>>> c.Roll(10)
>>> Render()
<paraview.servermanager.RenderView object at 0x125dd3e50>
>>> c.Roll(10)
>>> c.Azimuth(10)
>>> Render()
<paraview.servermanager.RenderView object at 0x125dd3e50>
Write the rendering to a file (shell or script)
One-liner to write the current rendering:
>>> WriteImage("/tmp/foo.png")
Stereoscopic Batch rendering
I gave a talk on the ins and outs of ParaView stereoscopic batch rendering:
Here's my main example of creating a "pvbatch" to render a stereo pair of images.
#! /home/avl/VR/Apps/ParaView/ParaView-v4.0.1-source/Build/bin/pvbatch
from paraview.simple import *
servermanager.LoadState("V3A.pvsm")
SetActiveView(GetRenderView())
view = GetActiveView()
scene = GetAnimationScene()
PythonAnimationCue1 = PythonAnimationCue()
PythonAnimationCue1.Script= """
def start_cue(self):
print 'Animation starting'
print 'NumberOfFrames = ' + str(scene.NumberOfFrames)
print 'FramesPerTimestep = ' + str(scene.FramesPerTimestep)
print 'PlayMode = ' + str(scene.PlayMode)
print 'StartTime = ' + str(scene.StartTime)
print 'EndTime = ' + str(scene.EndTime)
print 'Duration = ' + str(scene.Duration)
def tick(self):
i = scene.TimeKeeper.Time
print "time is " + str(i)
view.ViewTime = i
scene.AnimationTime = i
Render()
def end_cue(self):
print 'Animation ending'
"""
scene.Cues.append(PythonAnimationCue1)
# Make some tweaks to the visualization
#path=FindSource('TemporalParticlesToPathlines5')
#path.MaxTrackLength=55
path2=FindSource('TemporalParticlesToPathlines4')
path2.MaxTrackLength=2000
sphere=FindSource('Glyph4').GlyphType
sphere.PhiResolution=12
sphere.ThetaResolution=12
#tube=FindSource('Tube5')
tube2=FindSource('Tube4')
#tube.NumberofSides=12
#tube.Radius=0.020
tube2.NumberofSides=12
tube2.Radius=0.017
# Setup the rendering parameters
scene.NumberOfFrames=2408
view.ViewSize = [1920,1080]
view.StereoRender = 1
view.StereoType = "Left"
view.UseOffscreenRendering = 1
WriteAnimation("TCollision_02_L/tcollision_02_V3A_L.png")
view.StereoType = "Right"
view.UseOffscreenRendering = 1
WriteAnimation("TCollision_02_R/tcollision_02_V3A_R.png")
See Also
Links to other interesting ParaView pages with tips & tutorials: