Optica/Models/Instruments/fuel.xml

<?xml version="1.0"?>

<PropertyList>

<path>fuel.ac</path>

<animation>
  <type>material</type>
  <object-name>Face</object-name>
  <object-name>NeedleL</object-name>
  <object-name>NeedleR</object-name>
  <object-name>NeedleLoff</object-name>
  <object-name>NeedleRoff</object-name>
  <emission>
    <red>0.8</red>
    <green>0.4</green>
    <blue>0.2</blue>
    <factor-prop>/systems/electrical/outputs/panel-norm</factor-prop>
  </emission>
</animation>

<animation>
  <type>select</type>
  <object-name>NeedleL</object-name>
  <object-name>NeedleR</object-name>
  <condition>
    <property>systems/electrical/outputs/bus-dc</property>
  </condition>
</animation>
<animation>
  <type>select</type>
  <object-name>NeedleLoff</object-name>
  <object-name>NeedleRoff</object-name>
  <condition>
    <not><property>systems/electrical/outputs/bus-dc</property></not>
  </condition>
</animation>

<animation>
  <type>rotate</type>
  <object-name>NeedleL</object-name>
  <property>/consumables/fuel/tank[0]/level-lbs</property>
  <interpolation>
    <entry><ind>  0</ind><dep> 0</dep></entry>
    <entry><ind>198</ind><dep>60</dep></entry>
  </interpolation>
  <center>
    <x-m>0</x-m>
    <y-m>0.020</y-m>
    <z-m>0</z-m>
  </center>
  <axis>
    <x>-1</x>
    <y>0</y>
    <z>0</z>
  </axis>
</animation>

<animation>
  <type>rotate</type>
  <object-name>NeedleR</object-name>
  <property>/consumables/fuel/tank[1]/level-lbs</property>
  <interpolation>
    <entry><ind>  0</ind><dep> 0</dep></entry>
    <entry><ind>198</ind><dep>60</dep></entry>
  </interpolation>
  <center>
    <x-m>0</x-m>
    <y-m>-0.020</y-m>
    <z-m>0</z-m>
  </center>
  <axis>
    <x>1</x>
    <y>0</y>
    <z>0</z>
  </axis>
</animation>

</PropertyList>