ENABLE_3DCONNEXION_DEVICES - 1st installment of support for 3Dconnexion devices

Implemented using hidapi library (https://github.com/libusb/hidapi) and https://github.com/koenieee/CrossplatformSpacemouseDriver/tree/master/SpaceMouseDriver as reference

Unsolved issues:

- When manipulating the SpaceNavigator wxWidgets generates a mouse wheel event that needs to be filtered out

- wxWidgets does not detect devices being connected/disconnected to the pc

- Current state forces a continuous rendering

- Current state misses dependence on camera zoom

- Non intuitive movement limits

- Translation and rotation speed factors are hardcoded

- Number of device buttons hardcoded

src/slic3r/CMakeLists.txt

@@ -136,6 +136,8 @@ set(SLIC3R_GUI_SOURCES
     GUI/ProgressStatusBar.cpp
     GUI/PrintHostDialogs.cpp
     GUI/PrintHostDialogs.hpp
+    GUI/Mouse3DController.cpp
+    GUI/Mouse3DController.hpp
     Utils/Http.cpp
     Utils/Http.hpp
     Utils/FixModelByWin10.cpp
@@ -167,7 +169,7 @@ add_library(libslic3r_gui STATIC ${SLIC3R_GUI_SOURCES})
 
 encoding_check(libslic3r_gui)
 
-target_link_libraries(libslic3r_gui libslic3r avrdude cereal imgui ${GLEW_LIBRARIES})
+target_link_libraries(libslic3r_gui libslic3r avrdude cereal imgui ${GLEW_LIBRARIES} ${HIDAPI_LIBRARIES})
 if (SLIC3R_PCH AND NOT SLIC3R_SYNTAXONLY)
     add_precompiled_header(libslic3r_gui pchheader.hpp FORCEINCLUDE)
 endif ()