home *** CD-ROM | disk | FTP | other *** search
Text File | 1989-02-20 | 3.8 KB | 63 lines | [TEXT/ZBAS] |
- FOR A QUICK START
- To start a collision select either ‘New’ under the ‘File’ menu and click
- either of the first four buttons then select ‘Configure’ under the ‘Galaxy’
- menu and then click the ‘OK’ button, after a short wait the window will
- disappear. Now select ‘Plot’ from the ‘Galaxy’ menu and the plotting at
- each time unit will now occur. The collision that occurs depends on the
- button selected. By going straight to selecting ‘Configure’ under the
- ‘Galaxy’ menu and then click the ‘OK’ button, waiting, then selecting ‘Plot’
- from the ‘Galaxy’ menu a standard ring galaxy collision is started. If while
- under configure you change any of the data in the edit fields you can change
- to a non standard collision.
-
- APPLE MENU
- ‘About Galaxy Collisions...’ reshows the screen you had to cancel, by
- clicking the ‘Continue’ button or pressing the <Return> key.
-
- FILE MENU
- ‘New’ displays a dialog window for selecting various types of final
- galaxy types; Ring, Bridge & Whirlpool. The fourth type is for an unknown
- finish. Clicking any of the four radio buttons closes the ‘New’ window. To
- be able to repeat the results of a good random start, but only during a single
- startup of ‘3D Galaxy Collisions’, a check box is provided. Just click this
- box if you want to have repeatable random galaxy results. The edit field for
- softening factor is preset with 2. This ensures that gravitational effects
- don’t get out of had. Experiment with this number at your own risk, try
- lower numbers, but suggest 1.5 as low as you should go. The softening
- factor makes use of the inverse squared law of gravitation to reduce the
- effects of garvity when the galaxies are in close to each other.
- ‘Open...’ will open a standard dialog which allows you to choose ‘3D
- Galaxy Collision’ type files.
- ‘Close’ will close an open file.
- ‘Save’ will save an already ‘Save As...’ file.
- ‘Save As...’ will open a standard dialog which allows you to save ‘3D
- Galaxy Collision’ type files.
- ‘Help’ provides this help advice window.
- ‘Page Setup...’ brings up the standard page setup dialog for the particular
- printer selected with ‘Chooser’ under the ‘Apple Menu’.
- ‘Print...’ brings up the standard printer dialog for the particular printer
- selected with ‘Chooser’ under the ‘Apple Menu’. Note printing will make
- black stars on a white background, to reduce ribbon useage.
- ‘Transfer...’ allows transfer to another application.
- ‘Quit’ takes you back to the ‘Finder’.
-
- EDIT MENU
- Not yet functional between applications, but will work with edit fields
- and desk accessories.
-
- GALAXY MENU
- ‘Configure’ lets you make changes to standard data, such as change the
- number of stars and rings, to a maximum of 500 stars. You can also change
- the INTRUDER galaxy’s mass, start position and velocity through space.
- Change to the number of itterations can also be edited, once maximum
- itterations is reach you will have to step through each time period (see
- below for ‘Plot’). If you ‘Open...’ an existing file ‘Configure’ is skipped.
- ‘Plot’ will automatically commence stepping through the number of
- itterations set with ‘Configure’. Use <Stop> button to stop and <Step> to
- single step one time period at a time and <Continue> to resume automatic
- time itterations again. Note on a 512k Mac it will take 68 secs. between
- time itterations, that is why the watch cursor is displayed, a Mac Plus
- takes secs. and a Mac SE takes 57 secs. To get printouts or save an
- intermediate result use the <Stop> button to regain normal menu, dialog,
- etc. event processing.
-