if(GLUT_FOUND AND OPENGL_FOUND)
  include_directories(${GLUT_INCLUDE_DIR})
  add_definitions(-DGLUT_FOUND -DGLUT_NO_LIB_PRAGMA)

  # Tag interop_native_CUDA.cu for OBJ format intead of PTX (which is the default for
  # OPTIX_add_test_executable).  Do this before calling OPTIX_add_test_executable.
  set_source_files_properties(${CMAKE_CURRENT_SOURCE_DIR}/funcs_CUDA.cu
    PROPERTIES CUDA_SOURCE_PROPERTY_FORMAT OBJ
  )
  # See top level CMakeLists.txt file for documentation of OPTIX_add_sample_executable.
  OPTIX_add_sample_executable( sample6
    sample6.cpp

    # These files are common among multiple samples
    accum_camera.cu
    ambocc.cu
    commonStructs.h
    constantbg.cu
    helpers.h
    normal_shader.cu
    one_bounce_diffuse.cu
    orthographic_camera.cu
    parallelogram.cu
    pinhole_camera.cu
	funcs_CUDA.cu
    random.h
    )
	
	target_link_libraries( sample6
    ${CUDA_LIBRARIES}
    ${CUDA_TOOLKIT_RPATH_FLAG}
    )
else()
  # GLUT or OpenGL not found
  message("Disabling sample6, which requires glut and opengl.")
endif()