icetdatareplicationgroupcolor(3) [debian man page]
icetDataReplicationGroupColor(3) IceT Reference icetDataReplicationGroupColor(3) NAME
icetDataReplicationGroupColor -- define data replication. Synopsis #include <IceT.h> void icetDataReplicationGroupColor( IceTInt color ); Description IceT has the ability to take advantage of geometric data that is replicated among processes. If a group of processes share the same geome- try data, then IceT will split the region of the display that the data projects onto among the processes, thereby reducing the total amount of image composition work that needs to be done. Despite the name of the function, icetDataReplicationGroupColor has nothing to do the color of the data being replicated. Instead, color is used to mark the local process as part of a given group. When icetDataReplicationGroupColor is called, it finds all other processes that have the same color and builds a group based on this information. icetDataReplicationGroupColor must be called on every processes before the function will return. Errors None. Warnings None. Bugs IceT assumes that icetDataReplicationGroup is called with the exact same parameters on all processes belonging to a given group. Likewise, IceT also assumes that all processes have called icetBoundingVertices or icetBoundingBox with the exact same parameters on all processes belonging to a given group. These requirements are not strictly enforced, but failing to do so may cause some of the geometry to not be rendered. Copyright Copyright (C)2003 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 icetDataReplicationGroup(3), icetBoundingVertices(3), icetBoundingBox(3) IceT Reference September 20, 2010 icetDataReplicationGroupColor(3)
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icetCreateContext(3) IceT Reference icetCreateContext(3) NAME
icetCreateContext -- creates a new context. Synopsis #include <IceT.h> IceTContext icetCreateContext( IceTCommunicator comm ); Description The icetCreateContext function creates a new .igcontext!IceT IceT context, makes it current, and returns a handle to the new context. The handle returned is of type IceTContext. This is an opaque type that should not be handled directly, but rather simply passed to other IceT functions. Like OpenGL ,the IceT engine behaves like a large state machine. The parameters for engine operation is held in the current state. The entire state is encapsulated in a context. Each new context contains its own state. It is therefore possible to change the entire current state of IceT by simply switching contexts. Switching contexts is much faster, and often more convenient, than trying to change many state parameters. Errors None. Warnings None. Bugs It may be tempting to use contexts to run different IceT operations on separate program threads. Although certainly possible, great care must be taken. First of all, all threads will share the same context. Second of all, IceT is not thread safe. Therefore, a multi-threaded program would have to run all IceT commands in `critical sections' to ensure that the correct context is being used, and the methods exe- cute safely in general. Notes icetCreateContext duplicates the communicator comm. Thus, to avoid deadlocks on certain implementations (such as MPI), the user level pro- gram should call icetCreateContext on all processes with the same comm object at about the same time. Copyright Copyright (C)2003 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 icetDestroyContext(3), icetGetContext(3), icetSetContext(3), icetCopyState(3), icetGet(3) IceT Reference August 9, 2010 icetCreateContext(3)