The LCDD geometry needs to be dumped to plain GDML to be loaded by ROOT.
Before using ROOT, the environment needs to be setup.
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export ROOTSYS=/my/root/dir cd $ROOTSYS . $ROOTSYS/bin/thisroot.sh |
Assuming that there is a file called test.gdml in the current directory, a script similar to the following will load a plain GDML file into ROOT.
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TGeoManager::Import("test.gdml");
gGeoManager->GetTopVolume()->Draw("ogl");
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This command should display the ROOT OpenGL viewer with the geometry from the test.gdml file.
One can customize this by displaying only a particular volume, specified by name, using the following command:
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gGeoManager->GetVolume("VolumeName")->Draw("ogl");
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Note that in the gdml file the volume name has a hexadecimal number appended to it. This should be disregarded when specifying the volume name.