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       icetSingleImageStrategy  --  set the sub-strategy used to composite the image for a single


       #include <IceT.h>

       void icetSingleImageStrategy(   IceTEnum   strategy  );


       The main IceT algorithms are specially designed to  composite  data  defined  on  multiple
       tiles. Some of these algorithms, namely ICET_STRATEGY_REDUCE and ICET_STRATEGY_SEQUENTIAL,
       operate at least in part by compositing single  images  together.  IceT  also  comes  with
       multiple separate strategies for performing this single image compositing, and this can be
       selected with the icetSingleImageStrategy function.

       A single image strategy is chosen from one of the following provided enumerated values:

               Automatically chooses which single image strategy to use based on  the  number  of
              processes participating in the composition.

               The  classic  binary  swap  compositing algorithm. At each phase of the algorithm,
              each process partners with another, sends half of its image  to  its  partner,  and
              receives  the  opposite  half  from its partner. The processes are then partitioned
              into two groups that each have the same image part, and the algorithm recurses.

               The radix-k acompositing algorithm is similar to binary swap except that groups of
              processes  can  be larger than two. Larger groups require more overall messages but
              overlap blending and communication. The size of the groups is indirectly controlled
              by the ICET_MAGIC_K environment variable or CMake variable.

               At  each phase, each process partners with another, and one of the processes sends
              its entire image to the other. The algorithm recurses with the group  of  processes
              that received images until only one process has an image.

       By  default  IceT  sets  the single image strategy to ICET_SINGLE_IMAGE_STRATEGY_AUTOMATIC
       when a context is created. This is the single image strategy that will be used if no other
       is selected.


               The strategy argument does not represent a valid single image strategy.




       None known.


       Copyright (C)2010 Sandia Corporation

       Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation, the U.S. Government
       retains certain rights in this software.

       This source code is released under the New BSD License.

See Also

       icetDrawFrame(3), icetGetStrategyName(3) icetSingleImageStrategy(3)

IceT Reference                           August  9, 2010               icetSingleImageStrategy(3)