Gleam User Guide: Event Display
The Gleam event display GUI provides access to several kinds of controls:
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Standard 2-d detector view (Linux) |
- Event display appearance [Display menu]
- Includes controls on level of detail in detector display, rendering
(or suppression) of digi products, recon products, choice of view, etc.
- Event sources
[File menu, set source]
- Choose among many possible sources, ranging from simple test sources to
simulation of albedo and galactic sources.
- Run control [EventLoop menu]
- Generate single event, resume/pause continuous event generation.
- Redirection of output
[Display menu, System submenu]
- Messages generated during event processing are output
to the terminal window (unix) or console window (Windows) after each event.
It is possible to save
postscript [alternatively, see pdf
made from postscript] and VRML versions of the
event display.
- Miscellaneous
- You can also exit the program [File menu, exit] and
display help [Display menu, System submenu,
print instructions].
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Event display with open menu (Windows) |
On Linux only, a menu may be "torn off"
the main display, in which case it will stay open even after a selection is
made. Otherwise the display features are nearly identical on the two supported
platforms. They differ somewhat in appearance but not in any significant
way. Most examples in this write-up are taken from Linux.
Functions available from File, Display and EventLoop
menus are described in following sections. The final section enumerates
keyboard and mouse commands.
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| File and source menus |
The
set Outputlevel... item is currently inoperative. Exit will
exit the program. The source menu (truncated in the image to the right)
can be used to select from an extensive list of sources.
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| Display menu |
Most
but not all items accessible from this menu affect the appearance of the
display.
- show Detector
- increase detector detail level
- hide Detector
- reduce detector detail level
- Materials
- submenu of materials used in the detector which act
as toggles. By default, volumes of a toggled-on material
will be outlined in gray, but you may select an alternate color.
- G4
- submenu of simulator outputs which may be individually
enabled/disabled on the display
- TkrRecon
- submenu of outputs of Tracker reconstruction
which may be individually
enabled/disabled on the display
- Cal recon (toggle)
- Turn calorimeter reconstruction output on or off (on by
default).
- AcdRecon
- submenu of outputs of ACD reconstruction
which may be individually
enabled/disabled on the display
- axes (toggle)
- enable display of the coordinate axes
- Reference point (toggle)
- Displays coordinates of the reference point (but what is it?)
- Scale (toggle)
- Displays scale (mm)
- Set ref. point... (dialog)
- Allows you to set coordinates of the reference point.
- Set magnification... (dialog)
- Allows you to set magnification.
- System
- Submenu of items more or less tied to the interactive display.
- 3D Enabled (toggle)
- use to disable entire display for batch running
- 2D Enabled (toggle)
- For (unused) 2-d display capability.
- clear
- reset all event-related objects
- update
- redraw event-related objects
- Dump to postscript
- generate postscript file of current display as it appears
- Dump to vrml
- generate a VRML 1.0 file with the current display elements,
which can then be opened
with a VRML browser.
- Print instructions
- make a list of the keyboard
display commands
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EventLoop menu, quad view |
The event loop menu provides the following controls:
- Start/Resume (equivalent to typing cr)
- If paused, resume run. If running, pause.
- pause/step (equivalent to typing a space)
- When paused, trigger a single event. When running continuously,
pause.
- set pause interval... (dialog)
- Set interval in milliseconds between events during continuous running.
Defaults to 0.
- set max event... (dialog)
- Program will exit when max event is reached. Default is 1000.
- Quit Loop
- Deprecated. As of this writing (Oct. 8, 2002, running Gleam v2r3p3) behaves
just like Exit (on File menu) on Windows platform if you're already paused. If
the run is in progress, Quit Loop stops on the current event, allowing you to
examine the display if you wish, but all you can do afterwards is exit; you
cannot resume generating events. On Linux clicking Quit Loop crashes. You can
get the desired effect, on either platform, by using the space bar to pause,
then clicking Exit.
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3-d view of detector (View 4) |
As documented in the section on the EventLoop menu,
the space bar and carriage return may be used to control the flow of
events. Additionally, several keys have meaning for the appearance of
the display. The zero key (0) toggles between displaying a single detector
view (any of the standard 2-d views or
a 3-d view) and all 4
at once.
The complete list of meaningful keys, approximately as output by clicking
Display/System/Print instructions is
Keystroke display commands:
===========================
b,f move left,right (Back,Forward)
p,n move up,down (uP, Down)
m,s zoom in,out (Magnify, Shrink)
i,o move in,out (In, Out)
r reset view (Reset)
0 toggle single/quad view
1,2,3,4 select view#
u update (Update)
Following set action for ,.
x,y,z set x,y,z axis for rotation
d modify detail level by x2
, (comma) rotate left by 10 deg
< rotate left by 1 deg
. (period) rotate right by 10 deg
> rotate right by 1 deg
Notes: Reset restores the initial appearance of the current view.
Rotation axis refers to view coordinates which are fixed with respect to the
screen rather than the detector. For these coordinates, +z is
perpendicular to the screen, coming out, +x is to the right, and +y is up.
Some of the same display functions accessible from the keyboard may
be performed with the mouse. Clicking the left mouse button may be used to
shift the detector right, left, up or down within the window. Dragging the
mouse selects a rectange which will be expanded to the maximum which will fit
comfortably in the viewing space.
Last updated: 08 October, 2002 13:18:28 -0700
J. Bogart