I'm having problems with material animations under the osg version of 
flightgear. Melchior has confirmed that it's working for him with the 
plib version, and that the config is correct. It's an extremely somple 
model that consists of 2 buttons that turn a light on and off, so the 
xml looks like this:

<PropertyList>

  <path>ELT.ac</path>

  <animation>
   <type>pick</type>
   <visible>true</visible>
   <object-name>Enable</object-name>
   <action>
    <button>0</button>
    <repeatable>false</repeatable>
    <binding>
     <command>property-assign</command>
     <property>/instrumentation/elt/enabled</property>
     <value type="bool">true</value>
    </binding>
   </action>
  </animation>

  <animation>
   <type>pick</type>
   <visible>true</visible>
   <object-name>Reset</object-name>
   <action>
    <button>0</button>
    <repeatable>false</repeatable>
    <binding>
     <command>property-assign</command>
     <property>/instrumentation/elt/enabled</property>
     <value type="bool">false</value>
    </binding>
   </action>
  </animation>

  <animation>
   <type>material</type>
   <object-name>LED</object-name>
   <emission>
    <red>1</red>
    <green>0</green>
    <blue>0</blue>
    <factor-prop>/instrumentation/elt/enabled</factor-prop>
   </emission>
  </animation>

</PropertyList>

Clicking the Enable and Reset objects results in the relevant node being 
toggled in the property tree, but the LED object is never illuminated.

Anyone got a fix, or a workaround?

Jon

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