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Re: Saving animated sprites from a simple BASIC graphic program

From News <chrisjohnson@spamcop.net>
Subject Re: Saving animated sprites from a simple BASIC graphic program
Newsgroups comp.sys.acorn.programmer
Date 2020-03-17 23:39 +0000
Message-ID <5852e2d280chrisjohnson@spamcop.net> (permalink)
References <5852d177e9basura@invalid.addr.uk>
Organization None

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Have you tried plotting using exclusive OR (EOR) to do the plotting.
You plot the shape twice using EOR, the second plot effectively
deletes the shape just plotted. Then you recalculate the coordinates
and plot twice again. In this way you do not need any CLG, which
resets things each time.

You set the EOR action using GCOL 3, n. and then use the appropriate
plot command, eg LINE 9,0,100,100.

-- 
Chris Johnson

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Thread

Saving animated sprites from a simple BASIC graphic program Richard Ashbery <basura@invalid.addr.uk> - 2020-03-17 16:57 +0000
  Re: Saving animated sprites from a simple BASIC graphic program "John Williams (News)" <UCEbin@tiscali.co.uk> - 2020-03-17 17:28 +0000
    Re: Saving animated sprites from a simple BASIC graphic program Richard Ashbery <basura@invalid.addr.uk> - 2020-03-17 20:30 +0000
      Re: Saving animated sprites from a simple BASIC graphic program "John Williams (News)" <UCEbin@tiscali.co.uk> - 2020-03-17 21:12 +0000
        Re: Saving animated sprites from a simple BASIC graphic program Richard Ashbery <basura@invalid.addr.uk> - 2020-03-17 21:23 +0000
      Re: Saving animated sprites from a simple BASIC graphic program News <chrisjohnson@spamcop.net> - 2020-03-17 23:39 +0000
  Re: Saving animated sprites from a simple BASIC graphic program Steve Fryatt <news@stevefryatt.org.uk> - 2020-03-17 22:44 +0000
    Re: Saving animated sprites from a simple BASIC graphic program Richard Ashbery <basura@invalid.addr.uk> - 2020-03-18 17:44 +0000
      Re: Saving animated sprites from a simple BASIC graphic program druck <news@druck.org.uk> - 2020-03-18 20:55 +0000
      Re: Saving animated sprites from a simple BASIC graphic program Steve Fryatt <news@stevefryatt.org.uk> - 2020-03-19 00:08 +0000
        Re: Saving animated sprites from a simple BASIC graphic program Steve Fryatt <news@stevefryatt.org.uk> - 2020-03-19 07:38 +0000
          Re: Saving animated sprites from a simple BASIC graphic program News <chrisjohnson@spamcop.net> - 2020-03-19 10:17 +0000
          Re: Saving animated sprites from a simple BASIC graphic program Richard Ashbery <basura@invalid.addr.uk> - 2020-03-19 20:05 +0000
            Re: Saving animated sprites from a simple BASIC graphic program Steve Fryatt <news@stevefryatt.org.uk> - 2020-03-19 21:10 +0000
              Re: Saving animated sprites from a simple BASIC graphic program Richard Ashbery <basura@invalid.addr.uk> - 2020-03-19 21:59 +0000
      Re: Saving animated sprites from a simple BASIC graphic program Matthew Phillips <spam2011m@yahoo.co.uk> - 2020-03-19 08:23 +0000
        Re: Saving animated sprites from a simple BASIC graphic program Richard Ashbery <basura@invalid.addr.uk> - 2020-03-19 13:34 +0000
          Re: Saving animated sprites from a simple BASIC graphic program Matthew Phillips <spam2011m@yahoo.co.uk> - 2020-03-19 21:10 +0000
            Re: Saving animated sprites from a simple BASIC graphic program Richard Ashbery <basura@invalid.addr.uk> - 2020-03-19 21:40 +0000
  Re: Saving animated sprites from a simple BASIC graphic program "Derek.Moody" <derek.moody@casterbridge.net> - 2020-03-17 18:05 +0000

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