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GDML from ROOT

GDML Examination

TODO

  1. try to create the geometry Russian doll hierarchy (starting from World) from the GDML parse, to grok the format

physvol

2172   <structure>
2173     <volume name="/dd/Geometry/PoolDetails/lvNearTopCover0xbad46a0">
2174       <materialref ref="/dd/Materials/PPE0xb8310e0"/>
2175       <solidref ref="near_top_cover_box0xbad4490"/>
2176     </volume>
2177     <volume name="/dd/Geometry/RPC/lvRPCStrip0xb839910">
2178       <materialref ref="/dd/Materials/MixGas0xbad5d28"/>
2179       <solidref ref="RPCStrip0xb751cc0"/>
2180     </volume>
2181     <volume name="/dd/Geometry/RPC/lvRPCGasgap140xb7491f8">
2182       <materialref ref="/dd/Materials/Air0xb830740"/>
2183       <solidref ref="RPCGasgap140xbad5938"/>
2184       <physvol name="/dd/Geometry/RPC/lvRPCGasgap14#pvStrip14Array#pvStrip14ArrayOne:1#pvStrip14Unit0xbc1e930">
2185         <volumeref ref="/dd/Geometry/RPC/lvRPCStrip0xb839910"/>
2186         <position name="/dd/Geometry/RPC/lvRPCGasgap14#pvStrip14Array#pvStrip14ArrayOne:1#pvStrip14Unit0xbc1e930_pos" unit="mm" x="-910" y="0" z="0"/>
2187         <rotation name="/dd/Geometry/RPC/lvRPCGasgap14#pvStrip14Array#pvStrip14ArrayOne:1#pvStrip14Unit0xbc1e930_rot" unit="deg" x="0" y="0" z="-90"/>
2188       </physvol>
2189       <physvol name="/dd/Geometry/RPC/lvRPCGasgap14#pvStrip14Array#pvStrip14ArrayOne:2#pvStrip14Unit0xbc1f8b8">
2190         <volumeref ref="/dd/Geometry/RPC/lvRPCStrip0xb839910"/>
2191         <position name="/dd/Geometry/RPC/lvRPCGasgap14#pvStrip14Array#pvStrip14ArrayOne:2#pvStrip14Unit0xbc1f8b8_pos" unit="mm" x="-650" y="0" z="0"/>
2192         <rotation name="/dd/Geometry/RPC/lvRPCGasgap14#pvStrip14Array#pvStrip14ArrayOne:2#pvStrip14Unit0xbc1f8b8_rot" unit="deg" x="0" y="0" z="-90"/>
2193       </physvol>

Divide by 2 for open/close XML tags:

[blyth@belle7 gdml]$ grep physvol $LOCAL_BASE/env/geant4/geometry/gdml/g4_01.gdml | echo $(( $(wc -l)/2 ))
5642
simon:gdml blyth$ echo "select count(*) from physvol ;" | sqlite3 $LOCAL_BASE/env/geant4/geometry/gdml/g4_01.gdml.db
5642

Matches the distinct name count in shapedb from vrml2 file:

sqlite> select count(*) from shape ;
12229
sqlite> select count(distinct(name)) from shape ;
5642
sqlite> select count(distinct(hash)) from shape ;
12223
sqlite> select count(distinct(substr(name,0,instr(name,'.')))) from shape  ;
5642

ROOT Load of GDML, counts 12230 nodes matching the VRML2 shape count (assume extra 1 is world that was culled in VRML2):

root [0]  TGeoManager::Import("/data1/env/local/env/geant4/geometry/gdml/g4_01.gdml")
Info in <TGeoManager::Import>: Reading geometry from file: /data1/env/local/env/geant4/geometry/gdml/g4_01.gdml
Info in <TGeoManager::TGeoManager>: Geometry Geometry, default geometry created
Error: Unsupported GDML Tag Used :isotope. Please Check Geometry/Schema.
Error: Unsupported GDML Tag Used :atom. Please Check Geometry/Schema.
Error: Unsupported GDML Tag Used :fraction. Please Check Geometry/Schema.
...
Info in <TGeoManager::SetTopVolume>: Top volume is World. Master volume is World
Info in <TGeoManager::CheckGeometry>: Fixing runtime shapes...
Info in <TGeoManager::CheckGeometry>: ...Nothing to fix
Info in <TGeoManager::CloseGeometry>: Counting nodes...
Info in <TGeoManager::Voxelize>: Voxelizing...
Info in <TGeoManager::CloseGeometry>: Building cache...
Info in <TGeoNavigator::BuildCache>: --- Maximum geometry depth set to 100
Info in <TGeoManager::CloseGeometry>: 12230 nodes/ 249 volume UID's in default geometry
Info in <TGeoManager::CloseGeometry>: ----------------modeler ready----------------
(class TGeoManager*)0x89be148
root [1]

VRML2 GDML mismatch ?

Hmm, was expecting the phyvol to correspond to the 12k ?

  • so what are all the other VRML2 shapes 12229-5642=6587
  • clearly the algorithmically transformed/duplicated volumes, eg 2 AD, 672 PMT
  • the structure of the GDML heirarchy of volume/physvol/solid is doing the duplicatation that VRML2 spelt out in shapes
sqlite> select count(*) as N, name, max(dx)||":"||max(dy)||":"||max(dz) as dxyz from xshape group by name having N>1;
N           name                                                                                                                                                                                                      dxyz
----------  ---------------------------------------------------------------------------------------------                                                                                                             ----------------------------
2           /dd/Geometry/AD/lvADE#pvAdVertiCableTray.1005                                                                                                                                                             66.2000000000007:72.0:5000.0
2           /dd/Geometry/AD/lvADE#pvCenterCalibE.1001                                                                                                                                                                 798.1:798.0:688.98
2           /dd/Geometry/AD/lvADE#pvElectricalDistributionBoxE.1007                                                                                                                                                   608.200000000001:609.0:260.3
2           /dd/Geometry/AD/lvADE#pvGCatCalibE.1004
...
2           /dd/Geometry/AD/lvLSO#pvIAV.1000                                                                                                                                                                          3126.0:3126.0:3174.49
2           /dd/Geometry/AD/lvOAV#pvLSO.1000                                                                                                                                                                          3958.9:3959.0:4076.53
...
672         /dd/Geometry/PMT/lvPmtHemi#pvPmtHemiVacuum.1000                                                                                                                                                           297.0:297.0:292.5
672         /dd/Geometry/PMT/lvPmtHemiVacuum#pvPmtHemiBottom.1001                                                                                                                                                     196.100000000002:196.0:196.2
672         /dd/Geometry/PMT/lvPmtHemiVacuum#pvPmtHemiCathode.1000                                                                                                                                                    196.100000000002:196.0:196.2
672         /dd/Geometry/PMT/lvPmtHemiVacuum#pvPmtHemiDynode.1002                                                                                                                                                     174.900000000001:175.0:166.0

Maybe the AD split happedns here

26985       <physvol name="/dd/Geometry/Pool/lvNearPoolOWS#pvNearADE1OWSLegs#pvLegInOWS:1#pvLegInOWSUnit0xb905030">
26986         <volumeref ref="/dd/Geometry/PoolDetails/lvLegInOWSTub0xc4c2208"/>
26987         <position name="/dd/Geometry/Pool/lvNearPoolOWS#pvNearADE1OWSLegs#pvLegInOWS:1#pvLegInOWSUnit0xb905030_pos" unit="mm" x="4713" y="1842" z="-4456"/>
26988       </physvol>
26989       <physvol name="/dd/Geometry/Pool/lvNearPoolOWS#pvNearADE1OWSLegs#pvLegInOWS:2#pvLegInOWSUnit0xc12ecb0">
26990         <volumeref ref="/dd/Geometry/PoolDetails/lvLegInOWSTub0xc4c2208"/>
26991         <position name="/dd/Geometry/Pool/lvNearPoolOWS#pvNearADE1OWSLegs#pvLegInOWS:2#pvLegInOWSUnit0xc12ecb0_pos" unit="mm" x="1029" y="1842" z="-4456"/>
26992         <rotation name="/dd/Geometry/Pool/lvNearPoolOWS#pvNearADE1OWSLegs#pvLegInOWS:2#pvLegInOWSUnit0xc12ecb0_rot" unit="deg" x="0" y="0" z="-90"/>
26993       </physvol>
26994       <physvol name="/dd/Geometry/Pool/lvNearPoolOWS#pvNearADE1OWSLegs#pvLegInOWS:3#pvLegInOWSUnit0xb76f880">
26995         <volumeref ref="/dd/Geometry/PoolDetails/lvLegInOWSTub0xc4c2208"/>
26996         <position name="/dd/Geometry/Pool/lvNearPoolOWS#pvNearADE1OWSLegs#pvLegInOWS:3#pvLegInOWSUnit0xb76f880_pos" unit="mm" x="1029" y="-1842" z="-4456"/>
26997         <rotation name="/dd/Geometry/Pool/lvNearPoolOWS#pvNearADE1OWSLegs#pvLegInOWS:3#pvLegInOWSUnit0xb76f880_rot" unit="deg" x="0" y="0" z="-180"/>
26998       </physvol>
26999       <physvol name="/dd/Geometry/Pool/lvNearPoolOWS#pvNearADE1OWSLegs#pvLegInOWS:4#pvLegInOWSUnit0xc4c26e0">
27000         <volumeref ref="/dd/Geometry/PoolDetails/lvLegInOWSTub0xc4c2208"/>
27001         <position name="/dd/Geometry/Pool/lvNearPoolOWS#pvNearADE1OWSLegs#pvLegInOWS:4#pvLegInOWSUnit0xc4c26e0_pos" unit="mm" x="4713" y="-1842" z="-4456"/>
27002         <rotation name="/dd/Geometry/Pool/lvNearPoolOWS#pvNearADE1OWSLegs#pvLegInOWS:4#pvLegInOWSUnit0xc4c26e0_rot" unit="deg" x="0" y="0" z="90"/>
27003       </physvol>
27004       <physvol name="/dd/Geometry/Pool/lvNearPoolOWS#pvNearADE2OWSLegs#pvLegInOWS:1#pvLegInOWSUnit0xc4c27e0">
27005         <volumeref ref="/dd/Geometry/PoolDetails/lvLegInOWSTub0xc4c2208"/>
27006         <position name="/dd/Geometry/Pool/lvNearPoolOWS#pvNearADE2OWSLegs#pvLegInOWS:1#pvLegInOWSUnit0xc4c27e0_pos" unit="mm" x="-1029" y="1842" z="-4456"/>
27007       </physvol>
27008       <physvol name="/dd/Geometry/Pool/lvNearPoolOWS#pvNearADE2OWSLegs#pvLegInOWS:2#pvLegInOWSUnit0xc4c2890">
27009         <volumeref ref="/dd/Geometry/PoolDetails/lvLegInOWSTub0xc4c2208"/>
27010         <position name="/dd/Geometry/Pool/lvNearPoolOWS#pvNearADE2OWSLegs#pvLegInOWS:2#pvLegInOWSUnit0xc4c2890_pos" unit="mm" x="-4713" y="1842" z="-4456"/>
27011         <rotation name="/dd/Geometry/Pool/lvNearPoolOWS#pvNearADE2OWSLegs#pvLegInOWS:2#pvLegInOWSUnit0xc4c2890_rot" unit="deg" x="0" y="0" z="-90"/>
27012       </physvol>
27013       <physvol name="/dd/Geometry/Pool/lvNearPoolOWS#pvNearADE2OWSLegs#pvLegInOWS:3#pvLegInOWSUnit0xc4c2990">
27014         <volumeref ref="/dd/Geometry/PoolDetails/lvLegInOWSTub0xc4c2208"/>
27015         <position name="/dd/Geometry/Pool/lvNearPoolOWS#pvNearADE2OWSLegs#pvLegInOWS:3#pvLegInOWSUnit0xc4c2990_pos" unit="mm" x="-4713" y="-1842" z="-4456"/>
27016         <rotation name="/dd/Geometry/Pool/lvNearPoolOWS#pvNearADE2OWSLegs#pvLegInOWS:3#pvLegInOWSUnit0xc4c2990_rot" unit="deg" x="0" y="0" z="-180"/>
27017       </physvol>
27018       <physvol name="/dd/Geometry/Pool/lvNearPoolOWS#pvNearADE2OWSLegs#pvLegInOWS:4#pvLegInOWSUnit0xc4c2a90">
27019         <volumeref ref="/dd/Geometry/PoolDetails/lvLegInOWSTub0xc4c2208"/>
27020         <position name="/dd/Geometry/Pool/lvNearPoolOWS#pvNearADE2OWSLegs#pvLegInOWS:4#pvLegInOWSUnit0xc4c2a90_pos" unit="mm" x="-1029" y="-1842" z="-4456"/>
27021         <rotation name="/dd/Geometry/Pool/lvNearPoolOWS#pvNearADE2OWSLegs#pvLegInOWS:4#pvLegInOWSUnit0xc4c2a90_rot" unit="deg" x="0" y="0" z="90"/>
27022       </physvol>

Pick a volume to see whats going down in the GDML

simon:~ blyth$ echo "select id,uname,name from physvol where name like '/dd/Geometry/AD/lvOAV#pvLSO%' ;" |  sqlite3 $LOCAL_BASE/env/geant4/geometry/gdml/g4_01.gdml.db
377 /dd/Geometry/AD/lvOAV#pvLSO0xba431e8  /dd/Geometry/AD/lvOAV#pvLSO
4064     <volume name="/dd/Geometry/AD/lvOAV0xb78abc0">
4065       <materialref ref="/dd/Materials/Acrylic0xb85a2d8"/>
4066       <solidref ref="oav0xb78bb68"/>
4067       <physvol name="/dd/Geometry/AD/lvOAV#pvLSO0xba431e8">
4068         <volumeref ref="/dd/Geometry/AD/lvLSO0xbac5950"/>
4069         <position name="/dd/Geometry/AD/lvOAV#pvLSO0xba431e8_pos" unit="mm" x="0" y="0" z="31.5"/>
4070       </physvol>
4071       <physvol name="/dd/Geometry/AD/lvOAV#pvOcrGdsLsoInOav0xbc16ab8">
4072         <volumeref ref="/dd/Geometry/AdDetails/lvOcrGdsLsoInOav0xbc15650"/>
4073         <position name="/dd/Geometry/AD/lvOAV#pvOcrGdsLsoInOav0xbc16ab8_pos" unit="mm" x="0" y="0" z="2024.81037191693"/>
4074       </physvol>
4075       <physvol name="/dd/Geometry/AD/lvOAV#pvOcrCalLsoInOav0xbc16860">
4076         <volumeref ref="/dd/Geometry/AdDetails/lvOcrCalLsoInOav0xbc172a0"/>
4077         <position name="/dd/Geometry/AD/lvOAV#pvOcrCalLsoInOav0xbc16860_pos" unit="mm" x="0" y="0" z="2024.81037191693"/>
4078       </physvol>
4079     </volume>

Compare VRML2 shape names with physvol names

simon:gdml blyth$ vi ~/.sqliterc  # avoid truncation with ".width 256"
simon:gdml blyth$ echo "select distinct(name) from physvol order by name ;" | sqlite3 $LOCAL_BASE/env/geant4/geometry/gdml/g4_01.gdml.db > physvol_names

simon:gdml blyth$ scp N:/data1/env/local/env/geant4/geometry/vrml2/g4_01.db /usr/local/env/geant4/geometry/vrml2/
simon:gdml blyth$ echo "select distinct(name) from shape order by name ;" | sqlite3 $LOCAL_BASE/env/geant4/geometry/vrml2/g4_01.db > shape_names

Apparently the VRML2 names have been de-duped via the .1005 etc:

simon:gdml blyth$ diff -y physvol_names shape_names | head -10
name                                                            name
-------------------------------------------------------------   -------------------------------------------------------------
/dd/Geometry/AD/lvADE#pvAdVertiCableTray                      | /dd/Geometry/AD/lvADE#pvAdVertiCableTray.1005
/dd/Geometry/AD/lvADE#pvCenterCalibE                          | /dd/Geometry/AD/lvADE#pvCenterCalibE.1001
/dd/Geometry/AD/lvADE#pvElectricalDistributionBoxE            | /dd/Geometry/AD/lvADE#pvElectricalDistributionBoxE.1007
/dd/Geometry/AD/lvADE#pvGCatCalibE                            | /dd/Geometry/AD/lvADE#pvGCatCalibE.1004
/dd/Geometry/AD/lvADE#pvGasDistributionBoxE                   | /dd/Geometry/AD/lvADE#pvGasDistributionBoxE.1006
/dd/Geometry/AD/lvADE#pvMOClarityBoxE                         | /dd/Geometry/AD/lvADE#pvMOClarityBoxE.1008
/dd/Geometry/AD/lvADE#pvOffCenterCalibE                       | /dd/Geometry/AD/lvADE#pvOffCenterCalibE.1003
/dd/Geometry/AD/lvADE#pvOflTnkContainer                       | /dd/Geometry/AD/lvADE#pvOflTnkContainer.1002

simon:gdml blyth$ diff -y physvol_names shape_names | tail -10
/dd/Geometry/Sites/lvNearHallBot#pvNearHallRadSlabs#pvNearHal | /dd/Geometry/Sites/lvNearHallBot#pvNearHallRadSlabs#pvNearHal
/dd/Geometry/Sites/lvNearHallBot#pvNearPoolDead               | /dd/Geometry/Sites/lvNearHallBot#pvNearPoolDead.1000
/dd/Geometry/Sites/lvNearHallTop#pvNearRPCRoof                | /dd/Geometry/Sites/lvNearHallTop#pvNearRPCRoof.1003
/dd/Geometry/Sites/lvNearHallTop#pvNearRPCSptRoof             | /dd/Geometry/Sites/lvNearHallTop#pvNearRPCSptRoof.1004
/dd/Geometry/Sites/lvNearHallTop#pvNearTeleRpc#pvNearTeleRpc: | /dd/Geometry/Sites/lvNearHallTop#pvNearTeleRpc#pvNearTeleRpc:
/dd/Geometry/Sites/lvNearHallTop#pvNearTeleRpc#pvNearTeleRpc: | /dd/Geometry/Sites/lvNearHallTop#pvNearTeleRpc#pvNearTeleRpc:
/dd/Geometry/Sites/lvNearHallTop#pvNearTopCover               | /dd/Geometry/Sites/lvNearHallTop#pvNearTopCover.1000
/dd/Geometry/Sites/lvNearSiteRock#pvNearHallBot               | /dd/Geometry/Sites/lvNearSiteRock#pvNearHallBot.1001
/dd/Geometry/Sites/lvNearSiteRock#pvNearHallTop               | /dd/Geometry/Sites/lvNearSiteRock#pvNearHallTop.1000
/dd/Structure/Sites/db-rock                                   | /dd/Structure/Sites/db-rock.1000
simon:gdml blyth$

Using a very recent sqlite3 (for the instr function) chop off the VRML2 de-dupe:

[blyth@belle7 gdml]$ sqlite3-path
[blyth@belle7 gdml]$ sqlite3 -version
-- Loading resources from /home/blyth/.sqliterc

3.8.0.2 2013-09-03 17:11:13 7dd4968f235d6e1ca9547cda9cf3bd570e1609ef

[blyth@belle7 gdml]$ vi ~/.sqliterc
[blyth@belle7 gdml]$ echo "select distinct(substr(name,0,instr(name,'.'))) as name from shape order by name ;" | sqlite3 $LOCAL_BASE/env/geant4/geometry/vrml2/g4_01.db  > shape_names_2
simon:gdml blyth$ scp N:env/geant4/geometry/gdml/shape_names_2 .
simon:gdml blyth$ diff physvol_names shape_names_2
simon:gdml blyth$

Thus there are exactly the same VRML2 de-duped distinct shape names as GDML physvol names.

volume names

Only 249 volume/@name in the GDML:

simon:gdml blyth$ grep volume\  $LOCAL_BASE/env/geant4/geometry/gdml/g4_01.gdml
    <volume name="/dd/Geometry/PoolDetails/lvNearTopCover0xbad46a0">
    <volume name="/dd/Geometry/RPC/lvRPCStrip0xb839910">
    <volume name="/dd/Geometry/RPC/lvRPCGasgap140xb7491f8">
    <volume name="/dd/Geometry/RPC/lvRPCBarCham140xbad5978">
    <volume name="/dd/Geometry/RPC/lvRPCGasgap230xb83ee78">
    ...
    <volume name="/dd/Geometry/RadSlabs/lvNearRadSlab80xc505ff8">
    <volume name="/dd/Geometry/RadSlabs/lvNearRadSlab90xc632930">
    <volume name="/dd/Geometry/Sites/lvNearHallBot0xb7dd4a8">
    <volume name="/dd/Geometry/Sites/lvNearSiteRock0xb82e578">
    <volume name="World0xc6337a8">
simon:gdml blyth$ grep volume\  $LOCAL_BASE/env/geant4/geometry/gdml/g4_01.gdml | wc -l
     249

simon:gdml blyth$ echo "select count(*) from volume ;" | sqlite3 /usr/local/env/geant4/geometry/gdml/g4_01.gdml.db
249

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