if(FALSE)
set(SDK_HT "" CACHE FILEPATH "Path to headtracker library")
set(SDK_HT_FLANDMARK "" CACHE FILEPATH "Path to flandmark library for headtracker")
find_package(OpenCV 3.0 QUIET COMPONENTS ${opencv-modules})
if(OpenCV_FOUND)
    if(SDK_HT AND SDK_HT_FLANDMARK)
        otr_module(tracker-ht)
        target_link_libraries(opentrack-tracker-ht ${SDK_HT} ${SDK_HT_FLANDMARK} ${OpenCV_LIBS})
        target_include_directories(opentrack-tracker-ht SYSTEM PUBLIC ${OpenCV_INCLUDE_DIRS})
    endif()
endif()
endif()