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Tartan.m
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Tartan.m
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(*
* Tartan.m
*
* This file is part of the Oxford Oberon-2 compiler
* Copyright (c) 2006 J. M. Spivey
* All rights reserved
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* $Id: Tartan.m 267 2006-09-30 22:44:31Z mike $
*)
MODULE Tartan;
IMPORT XY := XYplane, Random;
CONST W = XY.W; H = XY.H;
VAR x, y: INTEGER;
BEGIN
XY.Open;
LOOP
x := Random.Roll(W);
FOR y := 0 TO H-1 DO
XY.Dot(x, y, XY.draw)
END;
y := Random.Roll(H);
FOR x := 0 TO W-1 DO
XY.Dot(x, y, XY.erase)
END;
CASE XY.Key() OF
'q': EXIT
| 'c': XY.Clear
ELSE
END
END
END Tartan.