fgdata/Environment/interpolator.xml

<?xml version="1.0" ?>
<!--
 This file is part of FlightGear, the free flight simulator
 http://www.flightgear.org/

 Copyright (C) 2009 Torsten Dreyer, Torsten (at) t3r _dot_ de

 This program is free software; you can redistribute it and/or
 modify it under the terms of the GNU General Public License as
 published by the Free Software Foundation; either version 2 of the
 License, or (at your option) any later version.

 This program is distributed in the hope that it will be useful, but
 WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 General Public License for more details.
-->
<!--
  Interpolate the values of /environment/interpolated/* over time
  and write the results to /environment/*, the environment of our
  aircraft
  All filters are enabled on /environment/config/enabled=true
-->
<PropertyList>

  <filter>
    <name>EnvironmentInterpolator:temperature-sea-level-degc</name>
    <enable>
      <condition>
        <property>/environment/config/enabled</property>
      </condition>
    </enable>
    <input>/environment/config/interpolated/temperature-sea-level-degc</input>
    <output>/environment/temperature-sea-level-degc</output>
    <type>noise-spike</type>
    <max-rate-of-change>0.1667</max-rate-of-change>
  </filter>

  <filter>
    <name>EnvironmentInterpolator:dewpoint-sea-level-degc</name>
    <enable>
      <condition>
        <property>/environment/config/enabled</property>
      </condition>
    </enable>
    <input>/environment/config/interpolated/dewpoint-sea-level-degc</input>
    <output>/environment/dewpoint-sea-level-degc</output>
    <type>noise-spike</type>
    <max-rate-of-change>0.1667</max-rate-of-change>
  </filter>

  <filter>
    <!--
      transfer the interpolated QNH to the global environment
      limit the rate of change to approx 1hpa/sec
    -->
    <name>EnvironmentInterpolator:pressure-sea-level-inhg</name>
    <type>noise-spike</type>
    <max-rate-of-change>0.03</max-rate-of-change>
    <enable>
      <condition>
        <property>/environment/config/enabled</property>
      </condition>
    </enable>
    <input>/environment/config/interpolated/pressure-sea-level-inhg</input>
    <output>/environment/pressure-sea-level-inhg</output>
  </filter>

  <filter>
    <name>EnvironmentInterpolator:visibility-m</name>
    <enable>
      <condition>
        <property>/environment/config/enabled</property>
      </condition>
    </enable>
    <input>
      <condition>
        <property>/environment/config/presets/visibility-m-override</property>
      </condition>
      <property>/environment/config/presets/visibility-m</property>
    </input>
    <input>/environment/config/interpolated/visibility-m</input>
    <output>/environment/visibility-m</output>
    <type>exponential</type>
    <filter-time>2</filter-time>
  </filter>

  <!-- 
    filter the wind vector by filtering the cartesian representation
  -->
  <filter>
    <name>EnvironmentInterpolator:wind-from-north</name>
    <enable>
      <condition>
        <property>/environment/config/enabled</property>
      </condition>
    </enable>
    <input>
      <condition>
        <property>/environment/config/presets/wind-override</property>
      </condition>
      <property>/environment/config/presets/wind-from-north-fps</property>
    </input>
    <input>/environment/config/interpolated/wind-from-north-fps</input>
    <output>/environment/wind-from-north-fps</output>
    <type>exponential</type>
    <filter-time>5</filter-time>
  </filter>

  <filter>
    <name>EnvironmentInterpolator:wind-from-east</name>
    <enable>
      <condition>
        <property>/environment/config/enabled</property>
      </condition>
    </enable>
    <input>
      <condition>
        <property>/environment/config/presets/wind-override</property>
      </condition>
      <property>/environment/config/presets/wind-from-east-fps</property>
    </input>
    <input>/environment/config/interpolated/wind-from-east-fps</input>
    <output>/environment/wind-from-east-fps</output>
    <type>exponential</type>
    <filter-time>5</filter-time>
  </filter>

  <filter>
    <name>EnvironmentInterpolator:wind-from-down</name>
    <input>
      <expression>
        <sum>
          <property>/environment/thermal-lift-fps</property>
          <property>/environment/ridge-lift-fps</property>
          <property>/environment/local-weather-lift-fps</property>
        </sum>
      </expression>
    </input>
    <output>/environment/wind-from-down-fps</output>
    <type>exponential</type>
    <filter-time>0.5</filter-time>
  </filter>

  <filter>
    <name>EnvironmentInterpolator:turbulence-raw-magnitude</name>
    <enable>
      <condition>
        <property>/environment/config/enabled</property>
      </condition>
    </enable>
    <input>
      <condition>
        <property>/environment/config/presets/turbulence-magnitude-norm-override</property>
      </condition>
      <property>/environment/config/presets/turbulence-magnitude-norm</property>
    </input>
    <input>
      <property>/environment/config/interpolated/turbulence/magnitude-norm</property>
    </input>
    <output>/environment/turbulence/raw-magnitude-norm</output>
    <type>exponential</type>
    <filter-time>1</filter-time>
  </filter>

  <filter>
    <name>EnvironmentInterpolator:turbulence-magnitude</name>
    <enable>
      <condition>
        <property>/environment/config/enabled</property>
      </condition>
    </enable>
    <input>
      <expression>
        <pow>
          <property>/environment/turbulence/raw-magnitude-norm</property>
          <property>/environment/turbulence/sensitivity</property>
        </pow>
      </expression>
    </input>
    <output>/environment/turbulence/magnitude-norm</output>
    <type>gain</type>
    <gain>1</gain>
  </filter>

  <filter>
    <name>EnvironmentInterpolator:turbulence-rate</name>
    <enable>
      <condition>
        <property>/environment/config/enabled</property>
      </condition>
    </enable>
    <input>/environment/config/interpolated/turbulence/rate-hz</input>
    <output>/environment/turbulence/rate-hz</output>
    <type>exponential</type>
    <filter-time>1</filter-time>
  </filter>

  <!-- replace weather-utility.nas -->
  <!--
    #this utility is a workaround for the fact that a shader uses listeners which cannot
    # be used with a tied property
  -->
  <filter>
    <name>EnvironmentInterpolator:wave:wind-from-east-fps</name>
    <input>/environment/config/boundary/entry[0]/wind-from-east-fps</input>
    <output>/environment/sea/surface/wind-from-east-fps</output>
    <type>exponential</type>
    <filter-time>/environment/sea/config/wind-filter-time</filter-time>
  </filter>

  <filter>
    <name>EnvironmentInterpolator:wave:wind-from-north-fps</name>
    <input>/environment/config/boundary/entry[0]/wind-from-north-fps</input>
    <output>/environment/sea/surface/wind-from-north-fps</output>
    <type>exponential</type>
    <filter-time>/environment/sea/config/wind-filter-time</filter-time>
  </filter>

  <!--filter> unused?
    <name>EnvironmentInterpolator:wave:wind-from-heading-deg</name>
    <input>/environment/config/boundary/entry[0]/wind-from-heading-deg</input>
    <output>/environment/sea/surface/wind-from-deg</output>
    <type>gain</type>
    <gain>1</gain>
  </filter-->

  <!--filter> unused?
    <name>EnvironmentInterpolator:wave:wind-speed-kt</name>
    <input>/environment/config/boundary/entry[0]/wind-speed-kt</input>
    <output>/environment/sea/surface/wind-speed-kt</output>
    <type>gain</type>
    <gain>1</gain>
  </filter-->

  <logic>
    <name>EnvironmentInterpolator:wave:enabled</name>
    <input>/environment/config/enabled</input>
    <output>/environment/sea/config/enabled</output>
  </logic>

  <filter>
    <name>EnvironmentInterpolator:model:heading</name>
    <input>/orientation/heading-deg</input>
    <output>/orientation/model/heading-deg</output>
    <type>gain</type>
    <gain>1</gain>
  </filter>

  <filter>
    <name>EnvironmentInterpolator:model:pitch</name>
    <input>/orientation/pitch-deg</input>
    <output>/orientation/model/pitch-deg</output>
    <type>gain</type>
    <gain>1</gain>
  </filter>

  <filter>
    <name>EnvironmentInterpolator:model:roll</name>
    <type>gain</type>
    <gain>1</gain>
    <input>/orientation/roll-deg</input>
    <output>/orientation/model/roll-deg</output>
  </filter>

  <filter>
    <name>EnvironmentInterpolator:wave:amp</name>
    <type>gain</type>
    <gain>1</gain>
    <input>
      <expression>
        <sum>
          <value>1.0</value>
          <product>
            <value>0.02</value>
            <property>/environment/config/boundary/entry[0]/wind-speed-kt</property>
          </product>
        </sum>
      </expression>
    </input>
    <output>/environment/wave/amp</output>
    <min>1.0</min>
    <max>2.0</max>
  </filter>

  <filter>
    <name>EnvironmentInterpolator:wave:angle</name>
    <type>gain</type>
    <gain>1</gain>
    <input>
      <expression>
        <sum>
          <value>35.0</value>
          <product>
            <value>0.2</value>
            <property>/environment/config/boundary/entry[0]/wind-speed-kt</property>
          </product>
        </sum>
      </expression>
    </input>
    <output>/environment/wave/angle</output>
  </filter>

  <filter>
    <name>EnvironmentInterpolator:wave:dangle</name>
    <type>gain</type>
    <gain>1</gain>
    <input>
      <expression>
        <difference>
          <value>20.0</value>
          <product>
            <value>0.4</value>
            <property>/environment/config/boundary/entry[0]/wind-speed-kt</property>
          </product>
        </difference>
      </expression>
    </input>
    <output>/environment/wave/dangle</output>
  </filter>

  <filter>
    <name>EnvironmentInterpolator:wave:freq</name>
    <type>gain</type>
    <gain>1</gain>
    <input>
      <expression>
        <sum>
          <value>0.01</value>
          <product>
            <value>0.0008</value>
            <property>/environment/config/boundary/entry[0]/wind-speed-kt</property>
          </product>
        </sum>
      </expression>
    </input>
    <output>/environment/wave/freq</output>
    <min>0.01</min>
    <max>0.015</max>
  </filter>

  <filter>
    <name>EnvironmentInterpolator:wave:factor</name>
    <type>gain</type>
    <gain>1</gain>
    <input>
      <expression>
        <difference>
          <value>0.0004</value>
          <product>
            <value>0.00001</value>
            <property>/environment/config/boundary/entry[0]/wind-speed-kt</property>
          </product>
        </difference>
      </expression>
    </input>
    <output>/environment/wave/factor</output>
    <min>0.0001</min>
    <max>0.0004</max>
  </filter>

  <filter>
    <name>EnvironmentInterpolator:wave:sharp</name>
    <type>gain</type>
    <gain>1</gain>
    <input>
      <expression>
        <sum>
          <value>1.0</value>
          <product>
            <value>0.02</value>
            <property>/environment/config/boundary/entry[0]/wind-speed-kt</property>
          </product>
        </sum>
      </expression>
    </input>
    <output>/environment/wave/sharp</output>
    <min>1.0</min>
    <max>2.0</max>
  </filter>

</PropertyList>