path: root/hacks/config/euler2d.xml

<?xml version="1.0" encoding="ISO-8859-1"?>

<screensaver name="euler2d" _label="Euler2D">

  <command arg="-root"/>

  <video href="https://www.youtube.com/watch?v=ZH1ZtfId0iA"/>

  <hgroup>
   <vgroup>
    <number id="delay" type="slider" arg="-delay %"
            _label="Frame rate" _low-label="Low" _high-label="High"
            low="0" high="100000" default="10000"
            convert="invert"/>

    <number id="count" type="slider" arg="-count %"
             _label="Particles" _low-label="Few" _high-label="Many"
            low="2" high="5000" default="1024"/>

    <number id="eulertail" type="slider" arg="-eulertail %"
             _label="Trail length" _low-label="Short" _high-label="Long"
            low="2" high="500" default="10"/>
   </vgroup>

   <vgroup>
  <!--
    <number id="eulerpower" type="slider" arg="-eulerpower %"
             _label="Power" _low-label="Low" _high-label="High"
            low="0.5" high="3.0" default="1.0"/>
  -->

    <number id="cycles" type="slider" arg="-cycles %"
             _label="Duration" _low-label="Short" _high-label="Long"
            low="100" high="5000" default="3000"/>

    <number id="ncolors" type="slider" arg="-ncolors %"
              _label="Number of colors" _low-label="Two" _high-label="Many"
              low="2" high="255" default="64"/>
   </vgroup>
  </hgroup>

  <boolean id="showfps" _label="Show frame rate" arg-set="-fps"/>
  <xscreensaver-updater />

  <_description>
Simulates two dimensional incompressible inviscid fluid flow.

https://en.wikipedia.org/wiki/Euler_equations_%28fluid_dynamics%29
https://en.wikipedia.org/wiki/Inviscid_flow

Written by Stephen Montgomery-Smith; 2002.
  </_description>
</screensaver>