AvroVulcanB2/Models/Effects/trail/trail.xml

<?xml version="1.0" encoding="UTF-8"?>

<PropertyList>
<particlesystem>
   <name>smoke</name>
   <texture>smoke.png</texture>

   <emissive type="bool">false</emissive>
   <lighting type="bool">false</lighting>

   <condition>
      <and>
        <greater-than>
          <!-- engines/engine[1]/rpm -->
          <property>sim/multiplay/generic/float[5]</property>
          <value>65</value>
        </greater-than>
        <greater-than>
          <!-- position/altitude-ft -->
          <property>sim/multiplay/generic/float[3]</property>
          <value>20000</value>
        </greater-than>
      </and>
   </condition>

   <attach>world</attach>

   <placer>
     <type>point</type> 
   </placer>

   <shooter>
     <theta-min-deg>-1.5</theta-min-deg>
     <theta-max-deg>1.5</theta-max-deg>
     <phi-min-deg>-1.5</phi-min-deg>
     <phi-max-deg>1.5</phi-max-deg>
     <speed-mps>
       <value>1</value>
       <spread>1</spread>
     </speed-mps>
     <rotation-speed>
       <x-min-deg-sec>0</x-min-deg-sec>
       <y-min-deg-sec>0</y-min-deg-sec>
       <z-min-deg-sec>0</z-min-deg-sec>
       <x-max-deg-sec>0</x-max-deg-sec>
       <y-max-deg-sec>0</y-max-deg-sec>
       <z-max-deg-sec>0</z-max-deg-sec>
     </rotation-speed>
   </shooter>

   <counter>
     <particles-per-sec>
       <value>100</value>
       <spread>0</spread>
     </particles-per-sec>
   </counter>
      
   <align>billboard</align>

   <particle>
     <start>
       <color>
         <red><value>   0.8 </value></red>
         <green><value> 0.8 </value></green>
         <blue><value>  0.8 </value></blue>
         <alpha><value> 0.2 </value></alpha>
       </color>
       <size>
         <value>0.70</value>
       </size>
     </start>

     <end>
       <color>
         <red><value>   0.8 </value></red>
         <green><value> 0.8 </value></green>
         <blue><value>  0.8 </value></blue>
         <alpha><value> 0.15 </value></alpha>
       </color>
       <size>
         <value>15</value>
       </size>
     </end>

     <life-sec>
       <value>14</value>
     </life-sec>
        
     <mass-kg>  0.5 </mass-kg>
     <radius-m> 0.5 </radius-m>
   </particle>

   <program>
     <fluid>               air  </fluid>
     <gravity type="bool"> true </gravity>
     <wind typ="bool">     true </wind>
   </program>

 </particlesystem>
</PropertyList>