Conference hydra::amiga_v1

2942.0. "VIBRA.ZOO uploaded." by AYOV28::ATHOMSON (C'mon, git aff! /The Kelty Clippie) Thu Sep 21 1989 08:55

    I've just uploaded VIBRA.ZOO to norse::amiga:[upload], the vibra.doc
    file follows the <FF>
    
    				Alan
    
    
    ------------------------------------------------------------------------
    
    Vibra.doc
   
    Fred Mitchell               Version 1.00                 6-01-89
    (215)228-7490
    
    Simulation of vibrating lines and planes
    
    NOTE: (c) 1989 Mitchell/Ware Systems. All rights reserved.
              This program may be freely distributed INTACT,
              UNALTERED in any way. The Three files must be present:
                Vibra
                Vibra.info
                Vibra.doc
              Anyone wishing to place this program on a Public Domain Disk
              should call and let me know about it first.            
    
    ------------------------------------------------------------------------
    
    Well, this is a really strange program! One day, while walking along
    in the park next to this lovely river, I wondered about the rising and
    falling of the waves in the water. Mainly, if there were a simple way
    to simulate them in a manner which would allow me to see them in in real
    time. Well, Vibra is a far cry from real water, but it allows you to
    see the dynamics involved. 
    
    Vibra sets up a number of what I call 'knots', linked by elastic
    elements that I shall refer to as 'rubber bands'. I know this is an
    extremely non-technical way to describe this, but just as well- the
    metaphor fits nicely. 
    
    Each knot is given a certain mass, and rubber bands are given a certain
    'springiness' factor. The knots are restricted to vertical motion, and
    are spaced at even intervals. Rubber bands join adjacent knots. Zero
    gravity is assumed. You may move any knot along its path of motion
    using the mouse. In the case of the Line simulation, the rightmost knot
    is anchored by a spring. In the case of the Plane Simulation, the knots
    at the edges are anchored, as though it were a trampoline. This
    anchoring can be turned off from the menu (Bound) so that the Line or
    Plane is totally unanchored.
    
    When you begin a simulation, all knots are at their 'rest' positions,
    at zero velocity. Simply pick up a knot with the mouse and deposit it
    elsewhere. Then the fun begins!
    
    The Plane simulation is notoriously slow for even modest dimensions.
    For tolerably fast Plane simulations, keep the dimensions under 10.
    (By dimensions, I mean how many knots on an edge. The Plane, then, will
    have 100 knots for a dimension of 10.)
    
    If you have any questions about this program, simply give me a call at
    (215)228-7490.
    
                -Fred Mitchell of Mitchell/Ware Systems
                
                 (Have Fun!)