COMP: Create CMake package config

Allows to use iMSTK as an external library
for other projects.

Documentation here:
https://cmake.org/cmake/help/git-master/manual/cmake-packages.7.html#creating-packages

CMakeLists.txt

@@ -166,16 +166,37 @@ add_subdirectory(Base/Constraint)
 string(TOLOWER "${PROJECT_NAME}" PROJECT_NAMESPACE)
 set(PROJECT_NAMESPACE "${PROJECT_NAMESPACE}::")
 
+include(CMakePackageConfigHelpers)
+write_basic_package_version_file(
+  "${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}ConfigVersion.cmake"
+  VERSION ${Upstream_VERSION}
+  COMPATIBILITY AnyNewerVersion
+  )
 export(EXPORT ${PROJECT_NAME}_TARGETS
   FILE ${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}Targets.cmake
   NAMESPACE ${PROJECT_NAMESPACE}
   )
+configure_file(${PROJECT_NAME}Config.cmake.in
+  "${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}Config.cmake"
+  @ONLY
+  )
 
 install(EXPORT ${PROJECT_NAME}_TARGETS
-  FILE ${PROJECT_NAME}Targets.cmake
-  NAMESPACE ${PROJECT_NAMESPACE}
-  COMPONENT Development
-  DESTINATION ${${PROJECT_NAME}_INSTALL_SHARE_DIR}
+  FILE
+    ${PROJECT_NAME}Targets.cmake
+  NAMESPACE
+    ${PROJECT_NAMESPACE}
+  DESTINATION
+    ${${PROJECT_NAME}_INSTALL_SHARE_DIR}
+  )
+install(
+  FILES
+    "${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}ConfigVersion.cmake"
+    "${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}Config.cmake"
+  DESTINATION
+    ${${PROJECT_NAME}_INSTALL_SHARE_DIR}
+  COMPONENT
+    Devel
   )
 
 #--------------------------------------------------------------------------

iMSTKConfig.cmake.in

+# Include and library paths
+set(CMAKE_INCLUDE_PATH "@CMAKE_INCLUDE_PATH@")
+set(CMAKE_LIBRARY_PATH "@CMAKE_LIBRARY_PATH@")
+
+# Path to iMSTK source directory
+set(iMSTK_SOURCE_DIR "@CMAKE_CURRENT_SOURCE_DIR@")
+
+# Update CMake module path
+list(INSERT CMAKE_MODULE_PATH 0 "${iMSTK_SOURCE_DIR}/CMake")
+
+# iMSTK settings
+set(iMSTK_USE_OMNI @iMSTK_USE_OMNI@)
+set(VegaFEM_DIR @VegaFEM_DIR@)
+set(VTK_DIR @VTK_DIR@)
+
+# g3log
+find_package( g3log REQUIRED )
+include_directories( ${g3log_INCLUDE_DIR} )
+
+# Eigen
+find_package( Eigen 3.1.2 REQUIRED )
+include_directories( ${Eigen_INCLUDE_DIR} )
+
+# SCCD
+find_package( SCCD REQUIRED )
+include_directories( ${SCCD_INCLUDE_DIR} )
+
+# VegaFEM
+find_package( VegaFEM REQUIRED CONFIG )
+
+# VTK
+find_package( VTK REQUIRED CONFIG )
+include( ${VTK_USE_FILE} )
+
+# VRPN
+find_package( VRPN REQUIRED )
+include_directories( ${VRPN_INCLUDE_DIRS} )
+add_definitions( -DVRPN_USE_LIBNIFALCON )
+if(${PROJECT_NAME}_USE_OMNI)
+  add_definitions( -DiMSTK_USE_OPENHAPTICS )
+  add_definitions( -DVRPN_USE_PHANTOM_SERVER )
+else()
+  remove_definitions( -DiMSTK_USE_OPENHAPTICS )
+  remove_definitions( -DVRPN_USE_PHANTOM_SERVER )
+endif()
+
+# iMSTK
+#link_directories(@CMAKE_LIBRARY_PATH@)
+include("@CMAKE_CURRENT_BINARY_DIR@/iMSTKTargets.cmake")