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#!N
#!CNavyBlue #!N #!Rexvp Executing a Visual Program #!N #!EC #!N
#!N After you set up a visual program in the VPE
window and build any desired Control Panels (or after you open
an existing visual program file), you can execute the visual program
program. The resulting image appears in the Image window. This section
explains how to execute a visual program. Section #!Luseimag,dxall299 h Using the Image Window #!EL describes how
to manipulate images in the Image window by using direct interactors.
You can also manipulate images in the Image window using interactors
in the Control Panels, the Colormap Editor, and the Sequencer. (For
more information on these tools, see #!Lbuico,dxall380 h Using Control Panels and Interactors #!EL , #!Lcolrmap,dxall794 h Colormap #!EL , and
#!Lsequenc,dxall939 h Sequencer #!EL in IBM Visualization Data Explorer User's Reference.) #!N #!N You
can execute the visual program from the #!F-adobe-times-bold-r-normal--18* Execute #!EF menu
of a VPE window, a Control Panel, an Image window, or
a Message window. The options are the same in all four
windows. When a visual program is executed, an Image window is
created if one is not already open. (You can also control
execution using the Execute module. See IBM Visualization Data Explorer User's
Reference.) #!N Note: If the #!F-adobe-times-bold-r-normal--18* Execute #!EF options are grayed-out,
your workstation may not be connected to the server. For information
about connecting to the server, see #!Lconserv,dxall493 h Connecting to the Server #!EL . #!N Although you
can initiate execution from the Control Panel, VPE, Image, and Message
windows, you may find it more efficient to execute your visual
program through the Control Panel menu (if you are using a
Control Panel). This efficiency is due to the ease with which
you can change inputs with interactors and initiate execution. #!N #!N
You can choose one of four options from the #!F-adobe-times-bold-r-normal--18* Execute
#!EF menu when executing a visual program. Select the first option,
#!F-adobe-times-bold-r-normal--18* Execute Once #!EF , to execute the program once, using
the values currently set in the interactors. If you change any
interactor values after execution, the visual program does not automatically execute;
you must again choose an option from the #!F-adobe-times-bold-r-normal--18* Execute #!EF
menu to execute the altered program. #!N #!N Choosing the #!F-adobe-times-bold-r-normal--18*
Execute on Change #!EF option causes the visual program to execute
every time you change an interactor setting. If you change values
faster than Data Explorer can generate images, the system executes the
program as quickly as possible, always using the current settings at
the time an execution cycle begins. If you modify your visual
program while #!F-adobe-times-bold-r-normal--18* Execute on Change #!EF is enabled, then the
option automatically becomes disabled. After the changes are made, you can
reenable it. #!N #!N Choosing #!F-adobe-times-bold-r-normal--18* End Execution #!EF while the
visual program is executing causes execution to stop after the currently
executing module. #!N #!N The final #!F-adobe-times-bold-r-normal--18* Execute #!EF menu option
is #!F-adobe-times-bold-r-normal--18* Sequencer #!EF . If you select this option, and
a Sequencer tool is present in the visual program, the Sequencer
appears (see #!Lsequen,dxall295 h Using the Sequencer #!EL for more information). While the Sequencer runs, you
can change interactor settings, and those changes are reflected in subsequent
frames generated by the Sequencer. The #!F-adobe-times-bold-r-normal--18* Execute Once #!EF and
#!F-adobe-times-bold-r-normal--18* Execute on Change #!EF options are grayed out when the
Sequencer is running, but when you pause the Sequencer, you can
use those two options to explore the particular frame the Sequencer
paused on. #!N #!N While the visual program is executing, the
#!F-adobe-times-bold-r-normal--18* Execute #!EF option on the menu bar is highlighted. It
remains highlighted until execution is finished. If #!F-adobe-times-bold-r-normal--18* Execute on Change
#!EF is selected, the #!F-adobe-times-bold-r-normal--18* Execute #!EF option on the menu
bar is highlighted with one color during execution, and another color
outside of execution cycles. #!N #!N #!N #!F-adobe-times-medium-i-normal--18* Next Topic #!EF
#!N #!N #!Lsequen,dxall295 h Using the Sequencer #!EL #!N #!F-adobe-times-medium-i-normal--18* #!N
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