-- Copyright (C) 2000-2002 The University of Cincinnati.  
-- All rights reserved. 

-- This file is part of VESTs (Vhdl tESTs).

-- UC MAKES NO REPRESENTATIONS OR WARRANTIES ABOUT THE SUITABILITY OF THE
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-- package under the terms of the "GNU GENERAL PUBLIC LICENSE" version 2,
-- June 1991. A copy of this license agreement can be found in the file
-- "COPYING", distributed with this archive.

-- You should have received a copy of the GNU General Public License
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-- ---------------------------------------------------------------------
--
-- $Id: bouncing_ball.ams,v 1.1 2002-03-27 22:11:17 paw Exp $
-- $Revision: 1.1 $
--
-- ---------------------------------------------------------------------

ENTITY bouncing_ball IS 
END ENTITY bouncing_ball; 

ARCHITECTURE simple OF bouncing_ball IS 

    QUANTITY v: real; 
    QUANTITY s: real; 
    CONSTANT G: real := 9.81; 

    CONSTANT Air_Res: real := 0.1; 

BEGIN 

    b1:BREAK v => 0.0, s => 30.0; -- announce discontinuity and reset

   b2:BREAK v => -0.7*v  WHEN NOT(s'above(0.0));

    velocity:  v == s'dot ; 

    acceleration: v'dot == -G;  

END ARCHITECTURE simple;