PROJECT (Step3) FIND_PACKAGE(VTK REQUIRED) IF(NOT VTK_USE_RENDERING) MESSAGE(FATAL_ERROR "Example ${PROJECT_NAME} requires VTK_USE_RENDERING.") ENDIF(NOT VTK_USE_RENDERING) INCLUDE(${VTK_USE_FILE}) ADD_EXECUTABLE(Cone3 Cone3.cxx) TARGET_LINK_LIBRARIES(Cone3 vtkRendering)