CHOP.BAS
27 Sep 1997 by Marc Kummel aka Treebeard.
Contact mkummel@rain.org, http://www.rain.org/~mkummel/

  About CHOP:
-------------

CHOP is an old program from the Vault (1986/1989) that draws mathematical 
waves and allows you to visualize wave interactions in a two dimensional 
plane.  You can make sequences of waves and play them back as movies.  I
haven't figured out how to do reflections yet.

I haven't had time to write a decent README yet.


  File List:
------------
The files below the dotted line are source files that can be deleted if you 
don't need then, but I won't do it for you.

  CHOP.EXE          DOS executable
  CHOP.ICO          an icon for Win31
  VGAOEM.FON        Win31 font in case it's not on your system
  README.TXT        this file
  TBVAULT.TXT       about Treebeard's Basic Vault
  ------------
  CHOP05.MAK        file list for PDS/QB
  CHOP05.BAS        source code: main module
  XQB.BAT           batch file to start PDS with source code
  MAKE.BAT          batch file to compile and link from DOS prompt
  
CHOP was written for MS Basic PDS 7.10.  QB4.5 will probably need some
changes.  It won't work with QBasic.

To use the source code, you will also need the following files from my NPF
program archive, also available from Treebeard's Basic Vault at
http://www.rain.org/~mkummel/basic.  Copy the files to your CHOP directory.  
The code requires special library routines, EMS sharing, and huge arrays so 
start PDS with /L TBLIB /ES and /AH options, or use the XQB.BAT batch file
to start everything automatically.

To run the source code from the PDS IDE you will have to reduce the maximum
partition size or else you will get Out Of Memory errors.  Search for
  
  CONST maxgrid = 150           'size of grid

in the main module and replace it with
  
  CONST maxgrid = 50

and it will run find.  Remember to change it back when you compile!

The required NPF files are:

  NPSUP.BI          include file of global declarations and variables
  GFONT5.BAS        code module to use Windows FON bitmap fonts
  EMS4.BAS          code module to use expanded memory
  SBSUP16.BAS       code module of support routines
  TBLIB.QLB         Quick Library of misc assembler routines
  TBLIB.LIB         Library files for compiling


  Conditions:
-------------
This program and source code are yours to use and modify as you will, but
they are offered as freeware with no warranty whatsoever.  Give me credit,
but do not distribute any changes under my name, or attribute such changes
to me in any way.  You're on your own!

Send comments and fixes to:

  Marc Kummel aka Treebeard
  mkummel@rain.org
  http://www.rain.org/~mkummel/

For more interesting Basic software with source code, check out Treebeard's
Basic Vault at http://www.rain.org/~mkummel/basic/