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perry |
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XScreenSaver |
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!!!XScreenSaver |
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NAME |
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SYNOPSIS |
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DESCRIPTION |
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OPTIONS |
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ENVIRONMENT |
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X RESOURCES |
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BUGS |
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SEE ALSO |
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COPYRIGHT |
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AUTHOR |
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---- |
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!!NAME |
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petri - simulates mold growing in a petri dish |
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!!SYNOPSIS |
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__petri__ [[-display ''host:display.screen''] |
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[[-foreground ''color''] [[-background ''color''] |
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[[-window] [[-root] [[-mono] [[-install] [[-visual ''visual''] |
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[[-delay ''microseconds''] [[-size ''integer''] |
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[[-mem-throttle ''amount''] [[-count ''integer''] |
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[[-originalcolors] [[-diaglim ''real''] [[-anychan |
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''real''] [[-minorchan ''real''] [[-instantdeathchan |
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''real''] [[-minlifespeed ''real''] [[-maxlifespeed |
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''real''] [[-mindeathspeed ''real''] [[-maxdeathspeed |
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''real''] [[-minlifespan ''integer''] [[-maxlifespan |
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''integer''] |
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!!DESCRIPTION |
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''petri'' simulates mold growing in a petri dish via a |
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state-heavy grid of automata (vaguely like Conway's Life, |
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only with much more state per cell). |
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!!OPTIONS |
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''petri'' accepts the following options: |
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__-window__ |
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Draw on a newly-created window. This is the |
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default. |
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__-root__ |
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Draw on the root window. |
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__-mono__ |
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If on a color display, pretend we're on a monochrome |
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display. |
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__-install__ |
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Install a private colormap for the window. |
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__-visual__ ''visual'' |
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Which visual to use. Legal values are the name of a visual |
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class, or the id number (decimal or hex) of a specific |
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visual. |
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__-delay__ ''microseconds'' |
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The interframe delay, in microseconds. Defaults to 10000, |
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resource ''delay''. |
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__-size__ ''integer'' |
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The size of a cell in pixels. Defaults to 4, resource |
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''size''. |
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__-mem-throttle__ ''amount'' |
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The maximum amount of memory to consume, specified either in |
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megabytes (suffix |
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memThrottle''. |
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__-count__ ''integer'' |
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How many different varieties of mold to grow (including |
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Black Death). Defaults to 8, resource |
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''count''. |
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__-originalcolors__ |
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If specified, indicates that the colors used should be the |
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artist's original choices (a fixed set of primary and |
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secondary colors). In this case, count must be 8 or less. |
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Defaults to not specified (i.e., false), resource |
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''originalcolors''. |
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__-diaglim__ ''real'' |
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The age limit for diagonal growth as a multiplier of |
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orthogonal growth (range 1..2). 1 means square growth, 1.414 |
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(i.e., ''sqrt(2)'') means approximately circular growth, |
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2 means diamond growth. Defaults to 1.414, resource |
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''diaglim''. |
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__-anychan__ ''real'' |
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The chance (range 0..1) that at each iteration, one or more |
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new cells will be born. Defaults to 0.0015, resource |
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''anychan''. |
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__-minorchan__ ''real'' |
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The chance (range 0..1) that, given that new cells will be |
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born, that only two will be added (hence being a minor cell |
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birth event). Defaults to 0.5, resource |
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''minorchan''. |
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__-instantdeathchan__ ''real'' |
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The chance (range 0..1) that, given that death and |
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destruction will happen, that instead of using Black Death |
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cells, death will come instantaneously. Defaults to 0.2, |
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resource ''instantdeathchan''. |
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__-minlifespeed__ ''real'' |
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The minimum speed for living cells as a fraction of the |
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maximum possible speed (range 0..1). Defaults to 0.04, |
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resource ''minlifespeed''. |
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__-maxlifespeed__ ''real'' |
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The maximum speed for living cells as a fraction of the |
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maximum possible speed (range 0..1). Defaults to 0.13, |
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resource ''maxlifespeed''. |
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__-mindeathspeed__ ''real'' |
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The minimum speed for Black Death cells as a fraction of the |
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maximum possible speed (range 0..1). Defaults to 0.42, |
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resource ''mindeathspeed''. |
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__-maxdeathspeed__ ''real'' |
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The maximum speed for Black Death cells as a fraction of the |
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maximum possible speed (range 0..1). Defaults to 0.46, |
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resource ''maxdeathspeed''. |
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__-minlifespan__ ''integer'' |
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The minimum lifespan for a colony, in iterations, before |
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Black Death comes. Defaults to 500, resource |
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''minlifespan''. |
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__-maxlifespan__ ''integer'' |
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The maximum lifespan for a colony, in iterations, before |
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Black Death comes. Defaults to 1500, resource |
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''maxlifespan''. |
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!!ENVIRONMENT |
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__DISPLAY__ |
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to get the default host and display number. |
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__XENVIRONMENT__ |
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to get the name of a resource file that overrides the global |
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resources stored in the RESOURCE_MANAGER |
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property. |
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!!X RESOURCES |
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There are resource equivalents for each option, noted |
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above. |
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!!BUGS |
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There are no known bugs in ''petri'' as of this |
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writing. |
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!!SEE ALSO |
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xscreensaver(1) |
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!!COPYRIGHT |
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Copyright 1992-2000 by Dan Bornstein. |
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Permission to use, copy, modify, distribute, and sell this |
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software and its documentation for any purpose is hereby |
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granted without fee, provided that the above copyright |
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notice appear in all copies and that both that copyright |
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notice and this permission notice appear in supporting |
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documentation. No representations are made about the |
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suitability of this software for any purpose. It is provided |
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!!AUTHOR |
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Dan Bornstein |
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---- |