Convincing ClipperLib to use Slic3r's own Point type internally.

src/libslic3r/Arrange.cpp

@@ -54,7 +54,7 @@ namespace Slic3r {
 
 template<class Tout = double, class = FloatingOnly<Tout>, int...EigenArgs>
 inline constexpr Eigen::Matrix<Tout, 2, EigenArgs...> unscaled(
-    const ClipperLib::IntPoint &v) noexcept
+    const Slic3r::ClipperLib::IntPoint &v) noexcept
 {
     return Eigen::Matrix<Tout, 2, EigenArgs...>{unscaled<Tout>(v.x()),
                                                 unscaled<Tout>(v.y())};
@@ -616,7 +616,7 @@ void arrange(ArrangePolygons &      arrangables,
              const BedT &           bed,
              const ArrangeParams &  params)
 {
-    namespace clppr = ClipperLib;
+    namespace clppr = Slic3r::ClipperLib;
     
     std::vector<Item> items, fixeditems;
     items.reserve(arrangables.size());

src/libslic3r/CMakeLists.txt

@@ -23,6 +23,8 @@ add_library(libslic3r STATIC
     BridgeDetector.hpp
     Brim.cpp
     Brim.hpp
+    clipper.cpp
+    clipper.hpp
     ClipperUtils.cpp
     ClipperUtils.hpp
     Config.cpp

src/libslic3r/ClipperUtils.hpp

@@ -8,9 +8,9 @@
 #include "Surface.hpp"
 
 // import these wherever we're included
-using ClipperLib::jtMiter;
-using ClipperLib::jtRound;
-using ClipperLib::jtSquare;
+using Slic3r::ClipperLib::jtMiter;
+using Slic3r::ClipperLib::jtRound;
+using Slic3r::ClipperLib::jtSquare;
 
 #define CLIPPERUTILS_UNSAFE_OFFSET
 

src/libslic3r/Geometry.hpp

@@ -22,12 +22,14 @@
 #pragma warning(pop)
 #endif // _MSC_VER
 
-namespace ClipperLib {
-class PolyNode;
-using PolyNodes = std::vector<PolyNode*>;
-}
+namespace Slic3r { 
 
-namespace Slic3r { namespace Geometry {
+    namespace ClipperLib {
+        class PolyNode;
+        using PolyNodes = std::vector<PolyNode*>;
+    }
+
+namespace Geometry {
 
 // Generic result of an orientation predicate.
 enum Orientation
@@ -530,6 +532,6 @@ inline bool is_rotation_ninety_degrees(const Vec3d &rotation)
     return is_rotation_ninety_degrees(rotation.x()) && is_rotation_ninety_degrees(rotation.y()) && is_rotation_ninety_degrees(rotation.z());
 }
 
-} }
+} } // namespace Slicer::Geometry
 
 #endif

src/libslic3r/pchheader.hpp

@@ -114,7 +114,7 @@
 #include <cereal/types/base_class.hpp>
 
 #include <clipper/clipper_z.hpp>
-#include <clipper/clipper.hpp>
+#include "clipper.hpp"
 #include "BoundingBox.hpp"
 #include "ClipperUtils.hpp"
 #include "Config.hpp"
@@ -129,8 +129,6 @@
 #include "libslic3r.h"
 #include "libslic3r_version.h"
 
-#include "clipper.hpp"
-
 #include <Shiny/Shiny.h>
 
 #include <admesh/stl.h>