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3.4.17 Tube with Hyperbolic Profile .......................................................................... 21 3.4.18 Cut Tube .......................................................................................................... 21 3.4.19 Tube Segment .................................................................................................. 22 3.4.20 Twisted Box .................................................................................................... 22 3.4.21 Twisted Trapezoid ........................................................................................... 23 3.4.22 Twisted General Trapezoid ............................................................................. 23 3.4.23 Twisted Tube Segment .................................................................................... 24 3.4.24 Extruded Solid ................................................................................................. 24 3.4.25 Arbitrary Trapezoid (Arb8) ............................................................................. 25 3.4.26 Tessellated solid .............................................................................................. 26 3.4.27 Tetrahedron ..................................................................................................... 27 3.4.28 Using loops for solids ...................................................................................... 28 3.4.29 Boolean Solids................................................................................................. 28 3.5 Structure .................................................................................................................... 29 3.5.1 Loops ............................................................................................................... 30 3.5.2 Replicated Volumes ........................................................................................ 32 3.5.3 Parameterised Volumes ................................................................................... 33 3.5.3.1. Dimensions of Parameterised Box ............................................................. 34 3.5.3.2. Dimensions of Parameterised Tube ............................................................ 34 3.5.3.3. Dimensions of Parameterised Cone ............................................................ 35 3.5.3.4. Dimensions of Parameterised Orb .............................................................. 35 3.5.3.5. Dimensions of Parameterised Sphere ......................................................... 35 3.5.3.6. Dimensions of Parameterised Torus ........................................................... 36 3.5.3.7. Dimensions of Parameterised Hype ........................................................... 36 3.5.3.8. Dimensions of Parameterised Parallelepiped ............................................. 36 3.5.3.9. Dimensions of Parameterised Trapezoid .................................................... 37 3.5.3.10. Dimensions of Parameterised General Trapezoid ...................................... 37 3.5.3.11. Dimensions of Parametrised Polycone ....................................................... 38 3.5.3.12. Dimensions of Parametrised Polyhedron ................................................... 38 3.5.3.13. Dimensions of Parametrised Ellipsoid ....................................................... 38 3.5.4 GDML Modules .............................................................................................. 39 3.5.5 Volume Auxiliary Information........................................................................ 40
3.5.6
Auxiliary User Information ............................................................................. 41
3.6 Setup ......................................................................................................................... 42 4. Importing and exporting GDML files ............................................................................. 44 4.1 GDML Reading ........................................................................................................ 44 4.1.1 Importing GDML files into Geant4 Geometry ............................................... 44 4.2 GDML Writing ......................................................................................................... 45 4.2.1 Exporting Geant4 Geometry ........................................................................... 45 4.2.2 Exporting ST-Viewer CAD Geometry ............................................................ 46 5. User extensions to GDML using Geant4 ........................................................................ 47 5.1 A ‘redefine’ element ................................................................................................. 48 5.2 New Elements ........................................................................................................... 48 Page 3 of 50