dumpMFGeometry_cfg.py

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import FWCore.ParameterSet.Config as cms

from FWCore.MessageLogger.MessageLogger_cfi import *
process = cms.Process("MF")
process.load("Configuration.StandardSequences.GeometryExtended_cff")
process.load("Configuration.StandardSequences.MagneticField_38T_cff")

process.XMLIdealGeometryESSource = cms.ESSource("XMLIdealGeometryESSource",
     geomXMLFiles = cms.vstring('Geometry/CMSCommonData/data/normal/cmsextent.xml', 
        'Geometry/CMSCommonData/data/cms.xml', 
        'Geometry/CMSCommonData/data/cmsMagneticField.xml',
        'MagneticField/GeomBuilder/data/MagneticFieldVolumes_160812_1.xml',
        'MagneticField/GeomBuilder/data/MagneticFieldVolumes_160812_2.xml',
        'Geometry/CMSCommonData/data/materials.xml'),
     rootNodeName = cms.string('cms:MCMS')
)


process.maxEvents = cms.untracked.PSet(
    input = cms.untracked.int32(1)
    )
process.source = cms.Source("EmptySource")

process.prod = cms.EDProducer("GeometryProducer",
                              MagneticField = cms.PSet(delta = cms.double(1.0)),
                              UseMagneticField = cms.bool(False),
                              UseSensitiveDetectors = cms.bool(False)
                              )

process.add_(cms.ESProducer("TGeoMgrFromDdd",
        verbose = cms.untracked.bool(False),
        level   = cms.untracked.int32(14)
))

process.dump = cms.EDAnalyzer("DumpSimGeometry", outputFileName = cms.untracked.string('cmsMFGeometry.root'))

process.p = cms.Path(process.prod+process.dump)