    #######################################################################
    #  MACRO FILE NAME: exN03Vis4.mac                                     #
    #                                                                     #
    #  AUTHOR(S): Satoshi Tanaka                                          #
    #                                                                     #
    #  DATE:                                                              #
    #        Nov      07, 2001                                            #
    #        Sept     08-09, 2001 (at Hebden Bridge, UK)                  #
    #        June     20, 2001                                            #
    #        November 26, 2000                                            #
    #        October  17, 2000                                            #
    #        June     06, 2000                                            #
    #                                                                     #
    #  CONTENTS: An example for the compound command,                     #
    #            "/vis/specify  "                    #
    #                                                                     #
    #  USAGE:  % gmake visclean                                           #
    #          % $G4BINDIR/exampleN03                                     #
    #          Idle> /control/execute visTutor/exN03Vis4.mac              #
    #                                                                     #
    #  REQUIRED PLATFORMS & SOFTWARES: Unix, X-window,                    #
    #                                  DAWN (version 3.85 or after)       #
    #                                  gv (Ghostview), Tcl/Tk             #
    #                                                                     #
    #  ENVIRONMENTAL VARIABLES (C-MACROS) FOR INSTALLATION:               #
    #  (See geant4/source/visualization/README for details.)              #
    #                                                                     #
    #    % setenv OGLHOME     ... (e.g. /usr/X11R6)                       #
    #    % setenv G4VIS_BUILD_OPENGLX_DRIVER   1                          #
    #                                                                     #
    #  ENVIRONMENTAL VARIABLES (C-MACROS) FOR COMPILATION:                #
    #  (See geant4/source/visualization/README for details.)              #
    #                                                                     #
    #    % setenv G4VIS_USE_OPENGLX            1                          #
    #                                                                     #
    #  ADDITIONAL NOTES:                                                  #
    #    The compound command "/vis/open "               #
    #    is equivalent to the following set of commands:                  #
    #                                                                     #
    #      /vis/sceneHandler/create $1                                    #
    #      /vis/viewer/create                                             #
    #                                                                     #
    #    The compound command "/vis/specify "        #
    #    is equivalent to the following set of commands:                  #
    #                                                                     #
    #      /vis/scene/create                                              #
    #      /vis/scene/add/logicalVolume $1                                #
    #      /vis/sceneHandler/attach                                       #
    #                                                                     #
    #######################################################################

    ##########################################################
    # Visualization with the OGLIX driver
    ##########################################################

    # Invoke the OGLIX driver
    /vis/open OGLIX

    # Set camera
    /vis/viewer/reset
    /vis/viewer/zoom       0.9
    /vis/viewer/set/viewpointThetaPhi  35 35

    # Visualize a selected logical volume
    /vis/specify           Absorber
    /vis/viewer/flush

    ##########################################################
    # Visualization with the DAWNFILE driver
    #
    #  * Each visualized view is saved to a file "g4_XX.eps"
    #    with the "vectorized" PostScript format.
    #
    #  * Set an environmental variable if you wish to
    #    skip DAWN GUI:
    #     % setenv G4DAWNFILE_VIEWER "dawn -d"
    ##########################################################
    # Invoke the DAWNFILE driver
    /vis/open DAWNFILE

    # Set camera
    /vis/viewer/reset
    /vis/viewer/zoom       0.9
    /vis/viewer/set/viewpointThetaPhi  35 35

    # Visualize a selected logical volume (1)
    /vis/specify                  Absorber
    /vis/scene/add/axes    0 0 0 500 mm
    /vis/scene/add/text    0 0 0 mm  40 -100 -200   LogVol:Absorber
    /vis/scene/notifyHandlers
    /vis/viewer/update

    # FOR FUTURE UPDATION
    #/vis/viewer/flushAll

    # Visualize a selected logical volume (2)
    /vis/specify  Gap
    /vis/scene/add/axes    0 0 0 500 mm
    /vis/scene/add/text    0 0 0 mm  40 -100 -200   LogVol:Gap
    /vis/scene/notifyHandlers
    /vis/viewer/update

    # FOR FUTURE UPDATION
    #/vis/viewer/flushAll