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				|  |  | +# - Find an OpenIGTLink installation or build tree.
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				|  |  | +
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				|  |  | +# When OpenIGTLink is found, the OpenIGTLinkConfig.cmake file is sourced to setup the
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				|  |  | +# location and configuration of OpenIGTLink.  Please read this file, or
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				|  |  | +# OpenIGTLinkConfig.cmake.in from the OpenIGTLink source tree for the full list of
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				|  |  | +# definitions.  Of particular interest is OpenIGTLink_USE_FILE, a CMake source file
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				|  |  | +# that can be included to set the include directories, library directories,
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				|  |  | +# and preprocessor macros.  In addition to the variables read from
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				|  |  | +# OpenIGTLinkConfig.cmake, this find module also defines
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				|  |  | +#  OpenIGTLink_DIR  - The directory containing OpenIGTLinkConfig.cmake.  
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				|  |  | +#             This is either the root of the build tree, 
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				|  |  | +#             or the lib/InsightToolkit directory.  
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				|  |  | +#             This is the only cache entry.
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				|  |  | +#   
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				|  |  | +#  OpenIGTLink_FOUND - Whether OpenIGTLink was found.  If this is true, 
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				|  |  | +#              OpenIGTLink_DIR is okay.
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				|  |  | +#
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				|  |  | +#  USE_OpenIGTLink_FILE - The full path to the UseOpenIGTLink.cmake file.  
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				|  |  | +#                 This is provided for backward 
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				|  |  | +#                 compatability.  Use OpenIGTLink_USE_FILE
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				|  |  | +#                 instead.
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				|  |  | +
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				|  |  | +
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				|  |  | +SET(OpenIGTLink_DIR_STRING "directory containing OpenIGTLinkConfig.cmake.  This is either the root of the build tree, or PREFIX/lib/igtl for an installation.")
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				|  |  | +
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				|  |  | +# Search only if the location is not already known.
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				|  |  | +IF(NOT OpenIGTLink_DIR)
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				|  |  | +  # Get the system search path as a list.
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				|  |  | +  IF(UNIX)
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				|  |  | +    STRING(REGEX MATCHALL "[^:]+" OpenIGTLink_DIR_SEARCH1 "$ENV{PATH}")
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				|  |  | +  ELSE(UNIX)
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				|  |  | +    STRING(REGEX REPLACE "\\\\" "/" OpenIGTLink_DIR_SEARCH1 "$ENV{PATH}")
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				|  |  | +  ENDIF(UNIX)
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				|  |  | +  STRING(REGEX REPLACE "/;" ";" OpenIGTLink_DIR_SEARCH2 ${OpenIGTLink_DIR_SEARCH1})
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				|  |  | +
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				|  |  | +  # Construct a set of paths relative to the system search path.
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				|  |  | +  SET(OpenIGTLink_DIR_SEARCH "")
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				|  |  | +  FOREACH(dir ${OpenIGTLink_DIR_SEARCH2})
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				|  |  | +    SET(OpenIGTLink_DIR_SEARCH ${OpenIGTLink_DIR_SEARCH} "${dir}/../lib/igtl")
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				|  |  | +  ENDFOREACH(dir)
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				|  |  | +
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				|  |  | +  #
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				|  |  | +  # Look for an installation or build tree.
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				|  |  | +  #
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				|  |  | +  FIND_PATH(OpenIGTLink_DIR OpenIGTLinkConfig.cmake
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				|  |  | +    # Look for an environment variable OpenIGTLink_DIR.
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				|  |  | +    $ENV{OpenIGTLink_DIR}
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				|  |  | +
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				|  |  | +    # Look in places relative to the system executable search path.
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				|  |  | +    ${OpenIGTLink_DIR_SEARCH}
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				|  |  | +
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				|  |  | +    # Look in standard UNIX install locations.
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				|  |  | +    /usr/local/lib/igtl
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				|  |  | +    /usr/lib/igtl
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				|  |  | +
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				|  |  | +    # Read from the CMakeSetup registry entries.  It is likely that
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				|  |  | +    # OpenIGTLink will have been recently built.
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				|  |  | +    [HKEY_CURRENT_USER\\Software\\Kitware\\CMakeSetup\\Settings\\StartPath;WhereBuild1]
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				|  |  | +    [HKEY_CURRENT_USER\\Software\\Kitware\\CMakeSetup\\Settings\\StartPath;WhereBuild2]
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				|  |  | +    [HKEY_CURRENT_USER\\Software\\Kitware\\CMakeSetup\\Settings\\StartPath;WhereBuild3]
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				|  |  | +    [HKEY_CURRENT_USER\\Software\\Kitware\\CMakeSetup\\Settings\\StartPath;WhereBuild4]
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				|  |  | +    [HKEY_CURRENT_USER\\Software\\Kitware\\CMakeSetup\\Settings\\StartPath;WhereBuild5]
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				|  |  | +    [HKEY_CURRENT_USER\\Software\\Kitware\\CMakeSetup\\Settings\\StartPath;WhereBuild6]
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				|  |  | +    [HKEY_CURRENT_USER\\Software\\Kitware\\CMakeSetup\\Settings\\StartPath;WhereBuild7]
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				|  |  | +    [HKEY_CURRENT_USER\\Software\\Kitware\\CMakeSetup\\Settings\\StartPath;WhereBuild8]
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				|  |  | +    [HKEY_CURRENT_USER\\Software\\Kitware\\CMakeSetup\\Settings\\StartPath;WhereBuild9]
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				|  |  | +    [HKEY_CURRENT_USER\\Software\\Kitware\\CMakeSetup\\Settings\\StartPath;WhereBuild10]
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				|  |  | +
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				|  |  | +    # Help the user find it if we cannot.
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				|  |  | +    DOC "The ${OpenIGTLink_DIR_STRING}"
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				|  |  | +  )
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				|  |  | +ENDIF(NOT OpenIGTLink_DIR)
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				|  |  | +
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				|  |  | +# If OpenIGTLink was found, load the configuration file to get the rest of the
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				|  |  | +# settings.
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				|  |  | +IF(OpenIGTLink_DIR)
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				|  |  | +  SET(OpenIGTLink_FOUND 1)
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				|  |  | +  INCLUDE(${OpenIGTLink_DIR}/OpenIGTLinkConfig.cmake)
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				|  |  | +
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				|  |  | +  # Set USE_OpenIGTLink_FILE for backward-compatability.
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				|  |  | +  SET(USE_OpenIGTLink_FILE ${OpenIGTLink_USE_FILE})
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				|  |  | +ELSE(OpenIGTLink_DIR)
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				|  |  | +  SET(OpenIGTLink_FOUND 0)
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				|  |  | +  IF(OpenIGTLink_FIND_REQUIRED)
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				|  |  | +    MESSAGE(FATAL_ERROR "Please set OpenIGTLink_DIR to the ${OpenIGTLink_DIR_STRING}")
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				|  |  | +  ENDIF(OpenIGTLink_FIND_REQUIRED)
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				|  |  | +ENDIF(OpenIGTLink_DIR)
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				|  |  | +
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