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petri (1)
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    NAME

    petri - simulates mold growing in a petri dish
     
    

    SYNOPSIS

    petri [-display host:display.screen] [-foreground color] [-background color] [-window] [-root] [-mono] [-install] [-visual visual] [-delay microseconds] [-size integer] [-mem-throttle amount] [-count integer] [-originalcolors] [-diaglim real] [-anychan real] [-minorchan real] [-instantdeathchan real] [-minlifespeed real] [-maxlifespeed real] [-mindeathspeed real] [-maxdeathspeed real] [-minlifespan integer] [-maxlifespan integer]  

    DESCRIPTION

    petri simulates mold growing in a petri dish via a state-heavy grid of automata (vaguely like Conway's Life, only with much more state per cell).  

    OPTIONS

    petri accepts the following options:
    -window
    Draw on a newly-created window. This is the default.
    -root
    Draw on the root window.
    -mono
    If on a color display, pretend we're on a monochrome display.
    -install
    Install a private colormap for the window.
    -visual visual
    Which visual to use. Legal values are the name of a visual class, or the id number (decimal or hex) of a specific visual.
    -delay microseconds
    The interframe delay, in microseconds. Defaults to 10000, resource delay.
    -size integer
    The size of a cell in pixels. Defaults to 4, resource size.
    -mem-throttle amount
    The maximum amount of memory to consume, specified either in megabytes (suffix "M"), kilobytes (suffix "K"), or bytes (sans suffix). In order to meet the memory requirement, the cell size may be increased. Defaults to 22M, resource memThrottle.
    -count integer
    How many different varieties of mold to grow (including Black Death). Defaults to 8, resource count.
    -originalcolors
    If specified, indicates that the colors used should be the artist's original choices (a fixed set of primary and secondary colors). In this case, count must be 8 or less. Defaults to not specified (i.e., false), resource originalcolors.
    -diaglim real
    The age limit for diagonal growth as a multiplier of orthogonal growth (range 1..2). 1 means square growth, 1.414 (i.e., sqrt(2)) means approximately circular growth, 2 means diamond growth. Defaults to 1.414, resource diaglim.
    -anychan real
    The chance (range 0..1) that at each iteration, one or more new cells will be born. Defaults to 0.0015, resource anychan.
    -minorchan real
    The chance (range 0..1) that, given that new cells will be born, that only two will be added (hence being a minor cell birth event). Defaults to 0.5, resource minorchan.
    -instantdeathchan real
    The chance (range 0..1) that, given that death and destruction will happen, that instead of using Black Death cells, death will come instantaneously. Defaults to 0.2, resource instantdeathchan.
    -minlifespeed real
    The minimum speed for living cells as a fraction of the maximum possible speed (range 0..1). Defaults to 0.04, resource minlifespeed.
    -maxlifespeed real
    The maximum speed for living cells as a fraction of the maximum possible speed (range 0..1). Defaults to 0.13, resource maxlifespeed.
    -mindeathspeed real
    The minimum speed for Black Death cells as a fraction of the maximum possible speed (range 0..1). Defaults to 0.42, resource mindeathspeed.
    -maxdeathspeed real
    The maximum speed for Black Death cells as a fraction of the maximum possible speed (range 0..1). Defaults to 0.46, resource maxdeathspeed.
    -minlifespan integer
    The minimum lifespan for a colony, in iterations, before Black Death comes. Defaults to 500, resource minlifespan.
    -maxlifespan integer
    The maximum lifespan for a colony, in iterations, before Black Death comes. Defaults to 1500, resource maxlifespan.
     

    ENVIRONMENT

    DISPLAY
    to get the default host and display number.
    XENVIRONMENT
    to get the name of a resource file that overrides the global resources stored in the RESOURCE_MANAGER property.
     

    X RESOURCES

    There are resource equivalents for each option, noted above.  

    BUGS

    There are no known bugs in petri as of this writing.  

    SEE ALSO

    xscreensaver(1)  

    COPYRIGHT

    Copyright © 1992-2000 by Dan Bornstein.

    Permission to use, copy, modify, distribute, and sell this software and its documentation for any purpose is hereby granted without fee, provided that the above copyright notice appear in all copies and that both that copyright notice and this permission notice appear in supporting documentation. No representations are made about the suitability of this software for any purpose. It is provided "as is" without express or implied warranty.  

    AUTHOR

    Dan Bornstein <danfuzz@milk.com>, 06-Jul-2000.


     

    Index

    NAME
    SYNOPSIS
    DESCRIPTION
    OPTIONS
    ENVIRONMENT
    X RESOURCES
    BUGS
    SEE ALSO
    COPYRIGHT
    AUTHOR


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