AIDASoft/DD4hep: v01-20-02

2022-04-04 Sanghyun Ko (PR#902)

• Fix a bug that cannot set G4 const property, following up #884

2022-03-30 Valentin Volkl (PR#899)

• cmake: DD4hepConfig: Drop unnecessary call to DD4HEP_SETUP_BOOST_TARGETS

2022-03-30 Markus Frank (PR#898)

• Reduce coverity warnings

2022-03-21 Markus Frank (PR#897) See for the example -- /examples/ClientTests/src/MaterialTester_geo.cpp -- /examples/OpticalSurfaces/compact/ReadMaterialProperties.xml -- /examples/OpticalSurfaces/scripts/ReadMaterialProperties.py

The python file is only there to show that the G4 simulation does not get screwed..... Otherwise: to define properties, which do not participate in Geant4:

    <material name="Water">
      <D type="density" value="1.0" unit="g/cm3"/>
      <composite n="2" ref="H"/>
      <composite n="1" ref="O"/>
      <!-- Properties used by Geant4    -->
      <property name="RINDEX"        ref="RINDEX__0x123aff00"/>
      <property name="ABSLENGTH"     ref="ABSLENGTH__0x123aff00"/>
      <property name="FASTCOMPONENT" ref="FASTCOMPONENT__0x123aff00"/>
      <property name="SLOWCOMPONENT" ref="SLOWCOMPONENT__0x123aff00"/>
      <!-- Properties ignored by Geant4 -->
      <property name="Property_of_mine" ref="Water__0x123aff00"/>
      <constant name="BirksConstant"    ref="Birk__Water|Geant4-ignore"/>
      <!-- Constants  ignored by Geant4 -->
      <constant name="Constant_of_mine" ref="Water__Mine|Geant4-ignore"/>
    </material>

where:

  <properties>
    <constant name="Birk__Water|Geant4-ignore" value="12.345678"/>
    <constant name="Water__Mine|Geant4-ignore" value="87.654321"/>
  </properties>

and

    <matrix name= "Water__0x123aff00" option="Geant4-ignore" coldim="1" values="  
              2.034*eV 
              2.068*eV 
              2.103*eV 
              2.139*eV 
              2.177*eV 
              2.216*eV 
    "/>
  </properties>

For non-const properties you have to set the option to "Geant4-ignore", otherwise you append the string to the name. The "ref" string in the material and the property must match. In the program you can then access the propertiers by name like this:

Material material(...)
double v = material->GetConstProperty("BirksConstant");
TGDMLMatrix* m = material->GetProperty("Property_of_mine");

like any other property. See for details: /examples/ClientTests/src/MaterialTester_geo.cpp lines 78-108

2022-03-21 Wouter Deconinck (PR#896)

• edm4hep: don't add particle as parent to its daughters, and vice versa

2022-03-15 Paul Gessinger (PR#895)

• Allow relaxing the python version requirements at CMake level via option DD4HEP_RELAX_PYVER.