|  | find_package(Qt4) | 
|  | find_package(OpenGL) | 
|  |  | 
|  | if(QT4_FOUND AND OPENGL_FOUND) | 
|  |  | 
|  | set(QT_USE_QTOPENGL TRUE) | 
|  | include(${QT_USE_FILE}) | 
|  |  | 
|  | set(CMAKE_INCLUDE_CURRENT_DIR ON) | 
|  |  | 
|  | include_directories( ${QT_INCLUDE_DIR} ) | 
|  |  | 
|  | set(quaternion_demo_SRCS  gpuhelper.cpp icosphere.cpp camera.cpp trackball.cpp quaternion_demo.cpp) | 
|  |  | 
|  | qt4_automoc(${quaternion_demo_SRCS}) | 
|  |  | 
|  | add_executable(quaternion_demo ${quaternion_demo_SRCS}) | 
|  | add_dependencies(demos quaternion_demo) | 
|  |  | 
|  | target_link_libraries(quaternion_demo | 
|  | ${QT_QTCORE_LIBRARY}    ${QT_QTGUI_LIBRARY} | 
|  | ${QT_QTOPENGL_LIBRARY}  ${OPENGL_LIBRARIES} ) | 
|  |  | 
|  | else() | 
|  |  | 
|  | message(STATUS "OpenGL demo disabled because Qt4 and/or OpenGL have not been found.") | 
|  |  | 
|  | endif() |