   PIVOT node
  Hy .What is pivot node in collada?I'm creating a collada importer and now i'm at sene import ,then i must rotate ,scalate and translate for each node, but in my parser i "meet" the PIVOT node , what is?this is an example:  <node id="rear_lights-node" name="rear_lights" type="NODE">   <translate>0.457656 1.53983 0.431033</translate>   <rotate>0 0.707107 0.707107 -180</rotate>   <node id="rear_lights-node_PIVOT" name="rear_lights_PIVOT" type="NODE"><matrix>1 0 0 0 0 1 0 0 0 0 1 -0.063738 0 0 0 1</matrix><instance_geometry url="#rear_lights-mesh">  <bind_material>    <technique_common> <instance_material symbol="ColorMaterial" target="#ColorMaterial_B01A1A00"/>    </technique_common>  </bind_material></instance_geometry>   </node> </node>The problem is that the material instance for the node is enclosed in pivot,then how do my parser when meet the pivot node?Thanks.   
  nobody?   