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A3DCallbackProgressIncrement
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.. c:type:: A3DCallbackProgressIncrement

   A callback function the library intermittently invokes while processing the PRC stream.
   
   As processing proceeds, the argument increments from 0 to a maximum of Size, where Size is the argument provided in :c:type:`~A3DCallbackProgressSize`\ .
   
   
      2.0
   
   




