3D connexion support on Linux:

- Replace hidapi/linux/hid.c with the hidraw variant (link to udev)
- Add CMakeLists.txt for hidapi, refactor
- Add udev rules file (no installation so far)

src/CMakeLists.txt

@@ -14,6 +14,7 @@ add_subdirectory(qhull)
 add_subdirectory(Shiny)
 add_subdirectory(semver)
 add_subdirectory(libigl)
+add_subdirectory(hidapi)
 
 # Adding libnest2d project for bin packing...
 set(LIBNEST2D_UNITTESTS ON CACHE BOOL "Force generating unittests for libnest2d")

src/hidapi/CMakeLists.txt

@@ -0,0 +1,17 @@
+
+if (WIN32)
+    set(HIDAPI_IMPL win/hid.c)
+elseif (APPLE)
+    set(HIDAPI_IMPL mac/hid.c)
+else ()
+    # Assume Linux or Unix other than Mac OS
+    set(HIDAPI_IMPL linux/hid.c)
+endif()
+
+include_directories(include)
+
+add_library(hidapi STATIC ${HIDAPI_IMPL})
+
+if (CMAKE_SYSTEM_NAME STREQUAL "Linux")
+    target_link_libraries(hidapi udev)
+endif()

src/slic3r/CMakeLists.txt

@@ -169,7 +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} ${HIDAPI_LIBRARIES})
+target_link_libraries(libslic3r_gui libslic3r avrdude cereal imgui ${GLEW_LIBRARIES} hidapi)
 if (SLIC3R_PCH AND NOT SLIC3R_SYNTAXONLY)
     add_precompiled_header(libslic3r_gui pchheader.hpp FORCEINCLUDE)
 endif ()

src/slic3r/GUI/Mouse3DController.cpp

@@ -9,6 +9,8 @@
 
 #include <wx/glcanvas.h>
 
+// WARN: If updating these lists, please also update resources/udev/90-3dconnexion.rules
+
 static const std::vector<int> _3DCONNEXION_VENDORS =
 {
     0x046d,  // LOGITECH = 1133 // Logitech (3Dconnexion is made by Logitech)