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- ΓòÉΓòÉΓòÉ 1. General Help ΓòÉΓòÉΓòÉ
-
- Welcome to Air Traffic Control Container, a very simple ATC radar simulator
- whose main purpose is to provide an interesting example of OS/2 PM Container
- programming. Its design was stimulated by the author's visit in October, 1993,
- to Bay TRACON, the main air traffic control location for the San Francisco Bay
- Area.
-
- ATC Container was originally written for a presentation by the author to the
- OS/2 Bay Area User Group's Developers SIG, on container programming.
-
- ATC Container illustrates several areas of container programming:
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- o Multiple views
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- o Inserting multiple container records
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- o Explicitly positioning records
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- o Enumerating container contents
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- o Using a PM Timer to move the container objects at regular intervals
-
- o Multiple context menus
-
- o Container background owner-drawing
-
- o Bitmaps for screen drawing performance
-
- o Randomly generating aircraft (always good to know)
-
- Dave Briccetti & Associates
- P.O. Box 1713
- Lafayette, CA 94549-7013
- USA
- 510 945-7565
- CompuServe: 74475,1072, Internet: daveb@netcom.com
-
- Copyright (c) 1993, David C. Briccetti
- All Rights Reserved.
-
-
- ΓòÉΓòÉΓòÉ 2. Views ΓòÉΓòÉΓòÉ
-
- ATC Container starts up in the Radar View, which bears a slight resemblance to
- the ARTS III radar scopes in use in some facilities. The jet icons represent
- targets being tracked, and the numbers below each icon represent the aircraft's
- altitude and speed. The altitude shown has the two rightmost zeroes removed for
- brevity. The speed has one zero removed.
-
- The other views do not provide positional information. The Name view just
- shows the icons and title text. The Text view just shows the title text.
-
- The Details view shows much more information about each aircraft, including the
- current and assigned heading, altitude, and speed.
-
- To change views, click in the container with the context menu mouse button when
- the mouse pointer is not over an aircraft.
-
-
- ΓòÉΓòÉΓòÉ 3. Controlling Aircraft ΓòÉΓòÉΓòÉ
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- ATC Container allows you to control aircraft. Click on an aircraft to bring up
- a context menu. Select the Control Aircraft menu item.
-
- A dialog box appears with spin buttons which allow you to assign a new heading,
- altitude, and speed. The aircraft will gradually maneuver to comply with your
- instructions.
-
-
- ΓòÉΓòÉΓòÉ 4. Limitations ΓòÉΓòÉΓòÉ
-
- ATC Container has many limitations.
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- Aircraft Maneuvering Rates
- The rates at which the aircraft change heading, altitude, and speed
- are not realistic. For example, a standard rate turn is 3 degrees
- per second, and these aircraft turn at 1 degree per second. Also,
- the program doesn't know enough about the compass to know that in
- order to change from heading 010 to 350 a 20 degree left turn would
- be appropriate. Instead, it will turn right.
-
- Scroll Bars
- As aircraft move off the scope, scroll bars appear. The program does
- not have proper support for scrolling.
-
- Crashing
- The program crashes occasionally
-
- Lack of cleanup
- The program does not free the memory it allocates, but sloppily
- relies on the C runtime library and/or OS/2 to clean up at program
- termination.
-
- Limited Usefulness
- ATC Container is an interesting container example, but it is far from
- a real ATC simulator.
-
-
- ΓòÉΓòÉΓòÉ <hidden> ΓòÉΓòÉΓòÉ
-
- Dave Briccetti & Associates has been developing sophisticated OS/2 applications
- for users and clients since 1987.
-
- As you might have guessed, Dave Briccetti is a private pilot.
-
-
- ΓòÉΓòÉΓòÉ <hidden> ΓòÉΓòÉΓòÉ
-
- The Developers SIG is a very technical subset of the OS/2 Bay Area User Group
- membership. The group meets once a month in Silicon Valley, and covers such
- topics as:
-
- o PM Programming
-
- o Workplace Shell programming
-
- o SOM programming
-
- o C++ and other object-oriented languages and facilities
-
- o Productive application development
-
- For more information about the Developers SIG, contact Dave Briccetti.