Gabriele Cosmo
77 lines
2.1 KiB
Plaintext
77 lines
2.1 KiB
Plaintext
$Id$
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///\file "geometry/transforms/.README"
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///\brief Extended example Transforms README page
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/*! \page Exampletransforms Example transforms
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This example shows various ways of definition of 3D transformations for
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placing volumes.
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\section Transforms_s1 Geometry construction
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Two G4Trd volumes (daughters) are placed within a G4Tubs (mother).
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The various ways of placement are implemented in the DetectorConstruction class
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in the following private functions:
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- PlaceWithDirectMatrix()
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- PlaceWithInverseMatrix()
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- PlaceWithAxialRotations()
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- PlaceWithEulerAngles()
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- PlaceWithReflections()
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which are then called from the Construct() function.
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All methods define exactly same geometry except for the placement
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with reflection where trapezoids are placed with their symmetry axis
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in parallel with z-axis in order to make easier to check reflection
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visually.
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The method of placement can be selected interactively via the command
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(see DetectorMessenger and debug.mac):
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\verbatim
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/placement/setMethod method
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\endverbatim
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\section Transforms_s2 Physics list
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PhysicsList.cc defines only geantino and transportation process.
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\section Transforms_s3 Primary generator
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Default kinematic is a geantino, at rest, at coordinate origin.
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Can be changed with particleGun commands.
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\section Transforms_s4 Physics
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No physics; only transportation.
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\section Transforms_s5 Visualisation
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Visualization Manager is set in the main().
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Initialisation of the drawing is done via the commands
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/vis/.. in the macro vis.mac. This macro is automatically read from the main
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in case of interactive running mode.
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\section Transforms_s6 How to start ?
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- Execute transforms in 'interactive mode' with visualization
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\verbatim
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% transforms
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....
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Idle> ---> type your commands. For instance:
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Idle> /control/execute debug.mac
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....
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Idle> /placement/setMethod WithInverseMatrix
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Idle> /run/beamOn 1
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....
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Idle> exit
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\endverbatim
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- Execute transforms in 'batch' mode from macro files
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\verbatim
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% transforms debug.mac
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\endverbatim
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*/
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