15 Sept 2007 J. Perl Overview of Geant4 Visualization 1 HepRep/HepRApp DAWN OpenGL Overview of...

15 Sept 2007 J. Perl Overview of Geant4 Visualization 1

HepRep/HepRApp

DAWN

OpenGL

Overview of Geant4 Visualization

Geant4 Mini-TutorialHebden Bridge

15 September 2007

Joseph Perl, SLAC

15 Sept 2007 J. Perl Overview of Geant4 Visualization 2

DAWNHepRep/FRED

OpenInventorRayTracer

Sorry, Vis Talks always need two pages of Cover Graphics

15 Sept 2007 3J. Perl Overview of Geant4 Visualization

ContentsContents

Overview of Visualization Driver Choices

Visualization Commands

Enhanced Trajectory Drawing

Trajectory and Hit Filtering

Smooth and Rich Trajectories

Movies

Volume Rendering

Coming in Next Year: Visualization of Fields

References


Quick Overview ofQuick Overview ofVisualization Driver ChoicesVisualization Driver Choices

Geant4 comes with Seven visualization drivers: OpenGL OpenInventor HepRep DAWN VRML RayTracer ASCIITree

I’ll show you some quick overview slides now. References section will show you other talks with more details on individual drivers and commands.

Different drivers are appropriate for different needs

The set of commands the user sees are consistent regardless of the driver


Quick response with flexible camera control to Quick response with flexible camera control to study geometries, trajectories and hitsstudy geometries, trajectories and hits

OpenGL and OpenInventor

Widely available world standards for fast, photo-realistic rendering.


High-quality Output for PublicationsHigh-quality Output for Publications

DAWNDAWN

Developed specifically for Geant4. Not fast, but the highest quality rendering available anywhere. Excellent for publications.


Interactive Picking to Get More Information on Interactive Picking to Get More Information on Visualized ObjectsVisualized Objects

HepRepHepRep

Reuses interactive HepRep browser applications already developed for other user communities (BaBar and GLAST). Explore hierarchies, pick to show attributes, apply cuts and labels.


Understand Complex Boolean Solids and Understand Complex Boolean Solids and Transparent or Reflective SurfacesTransparent or Reflective Surfaces

RayTracer

Reuses Geant4’s own tracking to shoot photons through the geometry


3D Format Suitable for Web Distribution3D Format Suitable for Web Distribution VRML

Many VRML browsers available, some as web plug-ins


Tools to Understand Geometry HierarchiesTools to Understand Geometry Hierarchies ASCIITree, HepRep/vis/ASCIITree/Verbose 4/vis/ASCIITree/Verbose 4/vis/viewer/flush/vis/viewer/flush"HadCalorimeterPhysical":0 / "HadCalorimeterLogical" / "HadCalorimeterBox"(G4Box), 1.8 m3 , 11.35 g/cm3"HadCalorimeterPhysical":0 / "HadCalorimeterLogical" / "HadCalorimeterBox"(G4Box), 1.8 m3 , 11.35 g/cm3

"HadCalColumnPhysical":-1 (10 replicas) / "HadCalColumnLogical" / "HadCalColumnBox"(G4Box), 180000 cm3, 11.35 g/cm3"HadCalColumnPhysical":-1 (10 replicas) / "HadCalColumnLogical" / "HadCalColumnBox"(G4Box), 180000 cm3, 11.35 g/cm3"HadCalCellPhysical":-1 (2 replicas) / "HadCalCellLogical" / "HadCalCellBox"(G4Box), 90000 cm3, 11.35 g/cm3"HadCalCellPhysical":-1 (2 replicas) / "HadCalCellLogical" / "HadCalCellBox"(G4Box), 90000 cm3, 11.35 g/cm3

"HadCalLayerPhysical":-1 (20 replicas) / "HadCalLayerLogical" / "HadCalLayerBox"(G4Box), 4500 cm3, 11.35 g/cm3"HadCalLayerPhysical":-1 (20 replicas) / "HadCalLayerLogical" / "HadCalLayerBox"(G4Box), 4500 cm3, 11.35 g/cm3"HadCalScintiPhysical":0 / "HadCalScintiLogical" / "HadCalScintiBox"(G4Box), 900 cm3, 1.032 g/cm3"HadCalScintiPhysical":0 / "HadCalScintiLogical" / "HadCalScintiBox"(G4Box), 900 cm3, 1.032 g/cm3


Example Visualization Command SequencesExample Visualization Command Sequences

Visualize a detector in OpenGL:Visualize a detector in OpenGL: /vis/open OGLIX/vis/open OGLIX /vis/drawVolume/vis/drawVolume

Visualize trajectories and hits for 10 events using HepRepVisualize trajectories and hits for 10 events using HepRep /vis/open HepRepFile/vis/open HepRepFile /vis/drawVolume/vis/drawVolume /vis/scene/add/trajectories/vis/scene/add/trajectories /vis/scene/add/hits/vis/scene/add/hits /run/beamOn 10/run/beamOn 10

The step-by-step Geant4 Installation Tutorials tell you enough The step-by-step Geant4 Installation Tutorials tell you enough commands to get you started:commands to get you started: geant4.slac.stanford.edu/installationgeant4.slac.stanford.edu/installation

A more detailed discussion of commands can be found in:A more detailed discussion of commands can be found in: geant4.slac.stanford.edu/Presentations/vis/G4VisCommands.pdfgeant4.slac.stanford.edu/Presentations/vis/G4VisCommands.pdf geant4.slac.stanford.edu/Presentations/vis/G4VisAdvanced.pdfgeant4.slac.stanford.edu/Presentations/vis/G4VisAdvanced.pdf


Controlling Detail Level of Detector GeometryControlling Detail Level of Detector Geometry By default, /vis/drawVolume will draw the entire detector geometry.By default, /vis/drawVolume will draw the entire detector geometry.

This is equivalent to the commands:This is equivalent to the commands: /vis/scene/create/vis/scene/create /vis/scene/add/volume world/vis/scene/add/volume world

You can specify additional arguments to limit the amount of geometry detail shown:You can specify additional arguments to limit the amount of geometry detail shown: /vis/scene/add/volume [<physical-volume-name>] [<copy-no>] [<depth-of-descending>]/vis/scene/add/volume [<physical-volume-name>] [<copy-no>] [<depth-of-descending>]

1st parameter: volume name1st parameter: volume name(default "world").(default "world").

2nd parameter: copy number2nd parameter: copy number(default -1 meaning first occurrence of physical-volume-name is selected.(default -1 meaning first occurrence of physical-volume-name is selected.

3rd parameter: depth of descending geometry hierarchy3rd parameter: depth of descending geometry hierarchy(default G4Scene::UNLIMITED (-1)).(default G4Scene::UNLIMITED (-1)).

Still more arguments can be given to specify a clipping volume.Still more arguments can be given to specify a clipping volume. vis/scene/add/volume world -1 -1 box km 0 1 0 1 0 1vis/scene/add/volume world -1 -1 box km 0 1 0 1 0 1

will draw the world with the positive octant cut away.will draw the world with the positive octant cut away.


Command GuidanceCommand Guidance Complete guidance on all commands is available from the command line:Complete guidance on all commands is available from the command line:

Idle> helpIdle> help Command directory path : /Command directory path : / Sub-directories :Sub-directories : 1) /control/ UI control commands.1) /control/ UI control commands. 2) /units/ Available units.2) /units/ Available units. 3) /geometry/ Geometry control commands.3) /geometry/ Geometry control commands. 4) /tracking/ TrackingManager and SteppingManager control commands.4) /tracking/ TrackingManager and SteppingManager control commands. 5) /event/ EventManager control commands.5) /event/ EventManager control commands. 6) /run/ Run control commands.6) /run/ Run control commands. 7) /random/ Random number status control commands.7) /random/ Random number status control commands. 8) /particle/ Particle control commands.8) /particle/ Particle control commands. 9) /process/ Process Table control commands.9) /process/ Process Table control commands. 10) /vis/ Visualization commands.10) /vis/ Visualization commands. 11) /mydet/ A01 detector setup control commands.11) /mydet/ A01 detector setup control commands. 12) /hits/ Sensitive detectors and Hits12) /hits/ Sensitive detectors and Hits 13) /gun/ Particle Gun control commands.13) /gun/ Particle Gun control commands. Commands :Commands : Type the number ( 0:end, -n:n level back ) :Type the number ( 0:end, -n:n level back ) :


Guidance DetailGuidance Detail Guidance is hierarchical, providing full detail on all commands.Guidance is hierarchical, providing full detail on all commands.

Command /vis/openCommand /vis/open

Creates a scene handler ready for drawing.Creates a scene handler ready for drawing. The scene handler becomes currentThe scene handler becomes current

(the name is auto-generated).(the name is auto-generated).

Parameter : graphics-system-nameParameter : graphics-system-name Parameter type : sParameter type : s Omittable : FalseOmittable : False Candidates : ATree DAWNFILECandidates : ATree DAWNFILE

GAGTree HepRepXML HepRepFileGAGTree HepRepXML HepRepFileRayTracer VRML1FILE VRML2FILERayTracer VRML1FILE VRML2FILEOGLIX OGLSXOGLIX OGLSX

Parameter : window-size-hintParameter : window-size-hint pixelspixels

Parameter type : iParameter type : i Omittable : TrueOmittable : True Default value : 600Default value : 600

Sub-directories : Sub-directories : 1) /vis/ASCIITree/ Commands for ASCIITree control.1) /vis/ASCIITree/ Commands for ASCIITree control. 2) /vis/GAGTree/ Commands for GAGTree control.2) /vis/GAGTree/ Commands for GAGTree control. 3) /vis/heprep/ HepRep commands.3) /vis/heprep/ HepRep commands. 4) /vis/rayTracer/ RayTracer commands.4) /vis/rayTracer/ RayTracer commands. 5) /vis/scene/ Operations on Geant4 scenes.5) /vis/scene/ Operations on Geant4 scenes. 6) /vis/sceneHandler/ Operations on Geant4 scene handlers.6) /vis/sceneHandler/ Operations on Geant4 scene handlers. 7) /vis/viewer/ Operations on Geant4 viewers.7) /vis/viewer/ Operations on Geant4 viewers. Commands : Commands : 8) enable * Enables/disables visualization system.8) enable * Enables/disables visualization system. 9) disable * Disables visualization system.9) disable * Disables visualization system. 10) verbose * Simple graded message scheme -10) verbose * Simple graded message scheme -

digit or string (1st character defines):digit or string (1st character defines): 11) drawTree * (DTREE) Creates a scene consisting of this 11) drawTree * (DTREE) Creates a scene consisting of this

physical volume and produces a representation of the geometry physical volume and produces a representation of the geometry hierarchy.hierarchy.

12) drawView * Draw view from this angle, etc.12) drawView * Draw view from this angle, etc. 13) drawVolume * Creates a scene consisting of this13) drawVolume * Creates a scene consisting of this

physical volume and asks the current viewer to draw it.physical volume and asks the current viewer to draw it. 14) open * Creates a scene handler ready for drawing.14) open * Creates a scene handler ready for drawing. 15) specify * Draws logical volume with Boolean components, 15) specify * Draws logical volume with Boolean components,

voxels and readout geometry.voxels and readout geometry.

16J. Perl Overview of Geant4 Visualization 15 Sept 2007

Creator Process

— muIoni

— Decay

— annihil

— eIoni

— brem

Momentum (MeV) — 0-1

— 1-10

— 10-20

— 20-30

— 30-50

— 50+

Charge

— +1

— 0

— -1

Interactive Control of Trajectory Drawing Model


Sample Commands: generic trajectory modelSample Commands: generic trajectory model# Create a generic model (will get default name of generic-0)# Create a generic model (will get default name of generic-0)# From here we can set overall defaults for things like line color,# From here we can set overall defaults for things like line color,# whether to show step points or just the trajectory line, etc.# whether to show step points or just the trajectory line, etc./vis/modeling/trajectories/create/generic/vis/modeling/trajectories/create/generic

# Configure the generic model to colour all trajectories cyan and to show step points# Configure the generic model to colour all trajectories cyan and to show step points/vis/modeling/trajectories/generic-0/default/setDrawStepPts true/vis/modeling/trajectories/generic-0/default/setDrawStepPts true/vis/modeling/trajectories/generic-0/default/setStepPtsSize 16/vis/modeling/trajectories/generic-0/default/setStepPtsSize 16/vis/modeling/trajectories/generic-0/default/setLineColour cyan/vis/modeling/trajectories/generic-0/default/setLineColour cyan/vis/modeling/trajectories/generic-0/default/setStepPtsColour red/vis/modeling/trajectories/generic-0/default/setStepPtsColour red


Sample Commands: drawByCharge modelSample Commands: drawByCharge model# Create a drawByCharge model (will get default name of drawCharge-0)# Create a drawByCharge model (will get default name of drawCharge-0)/vis/modeling/trajectories/create/drawByCharge/vis/modeling/trajectories/create/drawByCharge

# Create another drawByCharge model with an explicit name of testChargeModel# Create another drawByCharge model with an explicit name of testChargeModel/vis/modeling/trajectories/create/drawByCharge testChargeModel/vis/modeling/trajectories/create/drawByCharge testChargeModel

# We can now go on to configure these two different drawByCharge models and then# We can now go on to configure these two different drawByCharge models and then# can choose to visualize using either one of them at any time# can choose to visualize using either one of them at any time

# Configure drawByCharge-0 model # Configure drawByCharge-0 model /vis/modeling/trajectories/drawByCharge-0/set 1 red/vis/modeling/trajectories/drawByCharge-0/set 1 red/vis/modeling/trajectories/drawByCharge-0/set -1 red/vis/modeling/trajectories/drawByCharge-0/set -1 red/vis/modeling/trajectories/drawByCharge-0/set 0 white/vis/modeling/trajectories/drawByCharge-0/set 0 white

# Configure testCharge model through G4Colour components# Configure testCharge model through G4Colour components/vis/modeling/trajectories/testChargeModel/setRGBA 1 0 1 1 1/vis/modeling/trajectories/testChargeModel/setRGBA 1 0 1 1 1/vis/modeling/trajectories/testChargeModel/setRGBA -1 0.5 0.5 0.5 1/vis/modeling/trajectories/testChargeModel/setRGBA -1 0.5 0.5 0.5 1/vis/modeling/trajectories/testChargeModel/setRGBA 0 1 1 0 1/vis/modeling/trajectories/testChargeModel/setRGBA 0 1 1 0 1

# List available models# List available models/vis/modeling/trajectories/list/vis/modeling/trajectories/list

# select drawByCharge-0 to be current# select drawByCharge-0 to be current/vis/modeling/trajectories/select drawByCharge-0/vis/modeling/trajectories/select drawByCharge-0

19J. Perl Overview of Geant4 Visualization 15 Sept 2007

Momentum (MeV) — 0-2.5

— 2.5-5

— 5-7.5

— 7.5-10

— 10-10.25

— 12.5+

Interactive Control of Trajectoryand Hit Filtering

IMag > 2.5 MeV

IMag > 2.5 MeV,particle = gamma


Sample Macro CommandsSample Macro Commands

/vis/modeling/trajectories/drawByAttribute-0/setAttribute IMag/vis/modeling/trajectories/drawByAttribute-0/setAttribute IMag

/vis/modeling/trajectories/drawByAttribute-0/addInterval interval1 0.0 keV 2.5MeV/vis/modeling/trajectories/drawByAttribute-0/addInterval interval1 0.0 keV 2.5MeV

/vis/modeling/trajectories/drawByAttribute-0/addInterval interval2 2.5 MeV 5 MeV/vis/modeling/trajectories/drawByAttribute-0/addInterval interval2 2.5 MeV 5 MeV

/vis/modeling/trajectories/drawByAttribute-0/addInterval interval3 5 MeV 7.5 MeV/vis/modeling/trajectories/drawByAttribute-0/addInterval interval3 5 MeV 7.5 MeV


/vis/modeling/trajectories/drawByAttribute-0/addInterval interval5 10 MeV 12.5 MeV/vis/modeling/trajectories/drawByAttribute-0/addInterval interval5 10 MeV 12.5 MeV


/vis/modeling/trajectories/drawByAttribute-0/interval1/setLineColourRGBA 0.8 0 0.8 1/vis/modeling/trajectories/drawByAttribute-0/interval1/setLineColourRGBA 0.8 0 0.8 1

/vis/modeling/trajectories/drawByAttribute-0/interval2/setLineColourRGBA 0.23 0.41 1 1/vis/modeling/trajectories/drawByAttribute-0/interval2/setLineColourRGBA 0.23 0.41 1 1

/vis/modeling/trajectories/drawByAttribute-0/interval3/setLineColourRGBA 0 1 0 1/vis/modeling/trajectories/drawByAttribute-0/interval3/setLineColourRGBA 0 1 0 1


/vis/modeling/trajectories/drawByAttribute-0/interval5/setLineColourRGBA 1 0.3 0 1/vis/modeling/trajectories/drawByAttribute-0/interval5/setLineColourRGBA 1 0.3 0 1


/vis/filtering/trajectories/create/attributeFilter/vis/filtering/trajectories/create/attributeFilter

/vis/filtering/trajectories/attributeFilter-0/setAttribute IMag/vis/filtering/trajectories/attributeFilter-0/setAttribute IMag

/vis/filtering/trajectories/attributeFilter-0/addInterval 2.5 MeV 1000 MeV/vis/filtering/trajectories/attributeFilter-0/addInterval 2.5 MeV 1000 MeV

/vis/filtering/trajectories/create/particleFilter/vis/filtering/trajectories/create/particleFilter

/vis/filtering/trajectories/particleFilter-0/add gamma/vis/filtering/trajectories/particleFilter-0/add gamma

Momentum interval based colour scale

Momentum filter

Gamma filter

Configure visualisation properties

Momentum filter


Extra Information Available from the TrajectoryExtra Information Available from the Trajectory

Most users use the standard G4Trajectory Smooth Trajectory adds auxiliary points to allow smoother line in

visualization (not Geant4 Steps, no physics at auxiliary points) Useful when trajectories are highly curved due to magnetic fields

Rich Trajectory encodes additional information at every step point

Control via: /vis/scene/add/trajectories /vis/scene/add/trajectories smooth /vis/scene/add/trajectories rich /vis/scene/add/trajectories smooth rich

If you actually want to display the trajectory points, you need to issue the appropriate trajectory modeling commands, such as:

/vis/modeling/trajectories/create/generic /vis/modeling/trajectories/generic-0/default/setDrawStepPts true /vis/modeling/trajectories/generic-0/default/setStepPtsSize 16 /vis/modeling/trajectories/generic-0/default/setStepPtsColour red


Regular versus Smooth TrajectoryRegular versus Smooth Trajectory

Regular Trajectoryis a polyline made up of only the actual steps used by Geant4

Smooth Trajectoryincludes additional points to make the polyline appear smoother.

These additional points are not Geant4 steps.They are only used by visualization.


Smooth Trajectory for Vis in Magnetic FieldsSmooth Trajectory for Vis in Magnetic Fields

Yellow dots are the actual step points used by Geant4 Magenta dots are auxiliary points added just for purposes of visualization


Rich TrajectoryRich Trajectory


Movies: Stitched Together from Multiple StillsMovies: Stitched Together from Multiple Stills

QuickTime™ and aYUV420 codec decompressor

are needed to see this picture.

http://www.hep.man.ac.uk/u/johna/pub/Geant4/Movies/g4RayTracer.mpg


Movies: Live from Geant4 OpenGLMovies: Live from Geant4 OpenGL

QuickTime™ and a decompressor

are needed to see this picture.


gMocren - to Visualization Volume DatagMocren - to Visualization Volume Data Geant4 has been interfaced to a commercial tool for visualization of voxel data. Free to all Geant4 users. Does not actually function as integral part of the Geant4 visualization system.

Implemented as a G4 example, outputs data in form appropriate for gMocren

Ayumi Saitoh, Akinori Kimura, Satoshi Takana

28J. Perl Overview of Geant4 Visualization 15 Sept 2007Project Lead: Jane Tinslay

Coming Soon: Visualization of FieldsComing Soon: Visualization of Fields


References and Further ResourcesReferences and Further Resources


Geant4 Visualization ResourcesGeant4 Visualization ResourcesGeant4 Installation Guideshttp://geant4.slac.stanford.edu/installationHands on HepRApp Tutorialhttp://geant4.slac.stanford.edu/Presentations/vis/G4HepRAppTutorial/G4HepRAppTutorial.html

Hands on DAWN Tutorialhttp://geant4.slac.stanford.edu/Presentations/vis/G4DAWNTutorial/G4DAWNTutorial.htmlHands on OpenGL Tutorialhttp://geant4.slac.stanford.edu/Presentations/vis/G4OpenGLTutorial/G4OpenGLTutorial.html

Introduction to Geant4 Visualizationhttp://geant4.slac.stanford.edu/Presentations/vis/G4VisIntroduction.ppt (and .pdf)

Geant4 Visualization Commandshttp://geant4.slac.stanford.edu/Presentations/vis/G4VisCommands.ppt (and .pdf)

Geant4 Advanced Visualizationhttp://geant4.slac.stanford.edu/Presentations/vis/G4VisAdvanced.ppt (and .pdf)

How to Make a Moviehttp://geant4.slac.stanford.edu/Presentations/vis/HowToMakeAMovie.ppt (and .pdf)

Visualization Chapter of the Geant4 User’s Guide for Application Developershttp://geant4.web.cern.ch/geant4/UserDocumentation/UsersGuides/ForApplicationDeveloper/html/

List of Visualization Commands:http://geant4.web.cern.ch/geant4/UserDocumentation/UsersGuides/ForApplicationDeveloper/html/AllResources/Control/UIcommands/_vis_.html

For Questions or Comments: Geant4 Visualization Online Forum:http://geant4-hn.slac.stanford.edu:5090/HyperNews/public/get/visualization.html


ReferencesReferences OpenScientist Home PageOpenScientist Home Page

http://openscientist.lal.in2p3.frhttp://openscientist.lal.in2p3.fr HepRep: a generic interface definition for HEP event display representablesHepRep: a generic interface definition for HEP event display representables

http://www.slac.stanford.edu/~perl/heprephttp://www.slac.stanford.edu/~perl/heprep HepRApp HepRep BrowserHepRApp HepRep Browser

http://www.slac.stanford.edu/~perl/HepRApphttp://www.slac.stanford.edu/~perl/HepRApp Wired4 JAS Plug-InWired4 JAS Plug-In

http://wired.freehep.orghttp://wired.freehep.org Fred: oh no, another event display (a HepRep client)Fred: oh no, another event display (a HepRep client)

http://www.fisica.uniud.it/~glast/FREDhttp://www.fisica.uniud.it/~glast/FRED DAWN Home PageDAWN Home Page

http://geant4.kek.jp/~tanaka/DAWN/About_DAWN.htmlhttp://geant4.kek.jp/~tanaka/DAWN/About_DAWN.html DAWNCUT Home PageDAWNCUT Home Page

http://geant4.kek.jp/~tanaka/DAWN/About_DAWNCUT.htmlhttp://geant4.kek.jp/~tanaka/DAWN/About_DAWNCUT.html DAVID Home PageDAVID Home Page

http://geant4.kek.jp/~tanaka/DAWN/About_DAVID.htmlhttp://geant4.kek.jp/~tanaka/DAWN/About_DAVID.html Satoshi Tanaka’s GEANT4 Ritsumeikan University Group Home Page (more information on Satoshi Tanaka’s GEANT4 Ritsumeikan University Group Home Page (more information on

DAWN, sample PRIM files, images, etc.)DAWN, sample PRIM files, images, etc.)http://geant4.kek.jp/~tanaka/http://geant4.kek.jp/~tanaka/

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