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- README file for XSpringies 1.1 March 1, 1993
- ==============================
-
- General info:
- -------------
- XSpringies is a mass and spring simulation system. It's intended use is more
- like that of a game, than some design package.
-
- It's written using Xlib only. No Motif or any other widgets sets are used.
-
- The animation in XSpringies is done using an off-screen Pixmap. The next
- frame is drawn on this pixmap, then is blitted onto the screen. Since the
- frame rate is about 30 frames per second, slower machines (or machines which
- have poorly written bit-blitting code) will be deathly slow and blinky.
-
- Installation info:
- ------------------
- First, edit the Imakefile/Makefile.std and change the value of DDIR to reflect
- where you want to install the xspringies files. Don't forget the trailing /
- on the end of your filename.
-
- If you are using the Imakefile, type "xmkmf".
-
- If you have problems at the beginning, and you are using the
- Imakefile, it might be caused by the strange definition I have for
- "MKDIRHIER", which I had to redefine because of the silly way Imake
- is set up. If this happens, type "which mkdirhier" to see what the
- full path for mkdirhier is, and put this in place of the backquoted
- expression in the Imakefile. (i.e. - if the full path is
- "/usr/local/bin/mkdirhier", then you change the line to
- "MKDIRHIER = BourneShell /usr/local/bin/mkdirhier").
-
- Then, type "make install".
-
- Then, just run xspringies and have fun.
-
- Updates
- -------
- For version 1.1:
- Bugs fixed:
- - Compiles for NEWS system
- - Keyboard input now works under openlook window manager
- - Animation no longer gets 'stuck' after like 35 minutes
- - File format is more compact by removing unnecessary zeros
- (i.e. - before 1.500000, now 1.5) and has more precision to eliminate
- tiny errors perceived when saving and reloading a file
- - Strange ~-expansion behavior for filenames is gone
- - The GO! button replaces the hard to find Action checkbox
- - A Delete button was added, which is the same as the Delete key
-
- New features:
- - Spring thickness can be specified using the "-st <number>" command
- line switch (0 is default width - thin line)
- - Instead of the entire screen being bit-blitted, only the bounding box
- necessary to draw new objects and cover old objects is drawn. This
- greatly speeds up the animation when drawing small objects (such as
- a "jello"). If the bounding box changes size periodically (as in the
- "pendbees" file), the "-nbb" command line switch disables this feature
- to allow for slower, but smoother animation.
- - A cursor, and filename editing features were added. It uses emacs-like
- keys:
- ^B/^F = back/forward
- ^A/^E = goto beginning/end of line
- ^K/^Y = kill to end of line/yank from kill buffer
- ^D = delete character under cursor
- ^U = kill all input
- ^T = transpose character under cursor with previous character
- ESC = exit from filename edit mode
-
- Misc info:
- ----------
- The author of xspringies is Douglas DeCarlo.
- Email address: dmd@gradient.cis.upenn.edu
- Please send any bug-reports/comments/suggestions/demo-files to this address.
-