clipper source added to lib/clipper, not tested

libs/CMakeLists.txt

 add_subdirectory(qtandroidserialport)
 add_subdirectory(qwt)
 add_subdirectory(shapelib)
+add_subdirectory(clipper)

libs/clipper/CMakeCache.txt

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+	@echo "... install/local"
+	@echo "... clipper.o"
+	@echo "... clipper.i"
+	@echo "... clipper.s"
+.PHONY : help
+
+
+
+#=============================================================================
+# Special targets to cleanup operation of make.
+
+# Special rule to run CMake to check the build system integrity.
+# No rule that depends on this can have commands that come from listfiles
+# because they might be regenerated.
+cmake_check_build_system:
+	$(CMAKE_COMMAND) -H$(CMAKE_SOURCE_DIR) -B$(CMAKE_BINARY_DIR) --check-build-system CMakeFiles/Makefile.cmake 0
+.PHONY : cmake_check_build_system
+

libs/clipper/clipper.hpp

+/*******************************************************************************
+*                                                                              *
+* Author    :  Angus Johnson                                                   *
+* Version   :  6.4.2                                                           *
+* Date      :  27 February 2017                                                *
+* Website   :  http://www.angusj.com                                           *
+* Copyright :  Angus Johnson 2010-2017                                         *
+*                                                                              *
+* License:                                                                     *
+* Use, modification & distribution is subject to Boost Software License Ver 1. *
+* http://www.boost.org/LICENSE_1_0.txt                                         *
+*                                                                              *
+* Attributions:                                                                *
+* The code in this library is an extension of Bala Vatti's clipping algorithm: *
+* "A generic solution to polygon clipping"                                     *
+* Communications of the ACM, Vol 35, Issue 7 (July 1992) pp 56-63.             *
+* http://portal.acm.org/citation.cfm?id=129906                                 *
+*                                                                              *
+* Computer graphics and geometric modeling: implementation and algorithms      *
+* By Max K. Agoston                                                            *
+* Springer; 1 edition (January 4, 2005)                                        *
+* http://books.google.com/books?q=vatti+clipping+agoston                       *
+*                                                                              *
+* See also:                                                                    *
+* "Polygon Offsetting by Computing Winding Numbers"                            *
+* Paper no. DETC2005-85513 pp. 565-575                                         *
+* ASME 2005 International Design Engineering Technical Conferences             *
+* and Computers and Information in Engineering Conference (IDETC/CIE2005)      *
+* September 24-28, 2005 , Long Beach, California, USA                          *
+* http://www.me.berkeley.edu/~mcmains/pubs/DAC05OffsetPolygon.pdf              *
+*                                                                              *
+*******************************************************************************/
+
+#ifndef clipper_hpp
+#define clipper_hpp
+
+#define CLIPPER_VERSION "6.4.2"
+
+//use_int32: When enabled 32bit ints are used instead of 64bit ints. This
+//improve performance but coordinate values are limited to the range +/- 46340
+//#define use_int32
+
+//use_xyz: adds a Z member to IntPoint. Adds a minor cost to perfomance.
+//#define use_xyz
+
+//use_lines: Enables line clipping. Adds a very minor cost to performance.
+#define use_lines
+  
+//use_deprecated: Enables temporary support for the obsolete functions
+//#define use_deprecated  
+
+#include <vector>
+#include <list>
+#include <set>
+#include <stdexcept>
+#include <cstring>
+#include <cstdlib>
+#include <ostream>
+#include <functional>
+#include <queue>
+
+namespace ClipperLib {
+
+enum ClipType { ctIntersection, ctUnion, ctDifference, ctXor };
+enum PolyType { ptSubject, ptClip };
+//By far the most widely used winding rules for polygon filling are
+//EvenOdd & NonZero (GDI, GDI+, XLib, OpenGL, Cairo, AGG, Quartz, SVG, Gr32)
+//Others rules include Positive, Negative and ABS_GTR_EQ_TWO (only in OpenGL)
+//see http://glprogramming.com/red/chapter11.html
+enum PolyFillType { pftEvenOdd, pftNonZero, pftPositive, pftNegative };
+
+#ifdef use_int32
+  typedef int cInt;
+  static cInt const loRange = 0x7FFF;
+  static cInt const hiRange = 0x7FFF;
+#else
+  typedef signed long long cInt;
+  static cInt const loRange = 0x3FFFFFFF;
+  static cInt const hiRange = 0x3FFFFFFFFFFFFFFFLL;
+  typedef signed long long long64;     //used by Int128 class
+  typedef unsigned long long ulong64;
+
+#endif
+
+struct IntPoint {
+  cInt X;
+  cInt Y;
+#ifdef use_xyz
+  cInt Z;
+  IntPoint(cInt x = 0, cInt y = 0, cInt z = 0): X(x), Y(y), Z(z) {};
+#else
+  IntPoint(cInt x = 0, cInt y = 0): X(x), Y(y) {};
+#endif
+
+  friend inline bool operator== (const IntPoint& a, const IntPoint& b)
+  {
+    return a.X == b.X && a.Y == b.Y;
+  }
+  friend inline bool operator!= (const IntPoint& a, const IntPoint& b)
+  {
+    return a.X != b.X  || a.Y != b.Y; 
+  }
+};
+//------------------------------------------------------------------------------
+
+typedef std::vector< IntPoint > Path;
+typedef std::vector< Path > Paths;
+
+inline Path& operator <<(Path& poly, const IntPoint& p) {poly.push_back(p); return poly;}
+inline Paths& operator <<(Paths& polys, const Path& p) {polys.push_back(p); return polys;}
+
+std::ostream& operator <<(std::ostream &s, const IntPoint &p);
+std::ostream& operator <<(std::ostream &s, const Path &p);
+std::ostream& operator <<(std::ostream &s, const Paths &p);
+
+struct DoublePoint
+{
+  double X;
+  double Y;
+  DoublePoint(double x = 0, double y = 0) : X(x), Y(y) {}
+  DoublePoint(IntPoint ip) : X((double)ip.X), Y((double)ip.Y) {}
+};
+//------------------------------------------------------------------------------
+
+#ifdef use_xyz
+typedef void (*ZFillCallback)(IntPoint& e1bot, IntPoint& e1top, IntPoint& e2bot, IntPoint& e2top, IntPoint& pt);
+#endif
+
+enum InitOptions {ioReverseSolution = 1, ioStrictlySimple = 2, ioPreserveCollinear = 4};
+enum JoinType {jtSquare, jtRound, jtMiter};
+enum EndType {etClosedPolygon, etClosedLine, etOpenButt, etOpenSquare, etOpenRound};
+
+class PolyNode;
+typedef std::vector< PolyNode* > PolyNodes;
+
+class PolyNode 
+{ 
+public:
+    PolyNode();
+    virtual ~PolyNode(){};
+    Path Contour;
+    PolyNodes Childs;
+    PolyNode* Parent;
+    PolyNode* GetNext() const;
+    bool IsHole() const;
+    bool IsOpen() const;
+    int ChildCount() const;
+private:
+    //PolyNode& operator =(PolyNode& other); 
+    unsigned Index; //node index in Parent.Childs
+    bool m_IsOpen;
+    JoinType m_jointype;
+    EndType m_endtype;
+    PolyNode* GetNextSiblingUp() const;
+    void AddChild(PolyNode& child);
+    friend class Clipper; //to access Index
+    friend class ClipperOffset; 
+};
+
+class PolyTree: public PolyNode
+{ 
+public:
+    ~PolyTree(){ Clear(); };
+    PolyNode* GetFirst() const;
+    void Clear();
+    int Total() const;
+private:
+  //PolyTree& operator =(PolyTree& other);
+  PolyNodes AllNodes;
+    friend class Clipper; //to access AllNodes
+};
+
+bool Orientation(const Path &poly);
+double Area(const Path &poly);
+int PointInPolygon(const IntPoint &pt, const Path &path);
+
+void SimplifyPolygon(const Path &in_poly, Paths &out_polys, PolyFillType fillType = pftEvenOdd);
+void SimplifyPolygons(const Paths &in_polys, Paths &out_polys, PolyFillType fillType = pftEvenOdd);
+void SimplifyPolygons(Paths &polys, PolyFillType fillType = pftEvenOdd);
+
+void CleanPolygon(const Path& in_poly, Path& out_poly, double distance = 1.415);
+void CleanPolygon(Path& poly, double distance = 1.415);
+void CleanPolygons(const Paths& in_polys, Paths& out_polys, double distance = 1.415);
+void CleanPolygons(Paths& polys, double distance = 1.415);
+
+void MinkowskiSum(const Path& pattern, const Path& path, Paths& solution, bool pathIsClosed);
+void MinkowskiSum(const Path& pattern, const Paths& paths, Paths& solution, bool pathIsClosed);
+void MinkowskiDiff(const Path& poly1, const Path& poly2, Paths& solution);
+
+void PolyTreeToPaths(const PolyTree& polytree, Paths& paths);
+void ClosedPathsFromPolyTree(const PolyTree& polytree, Paths& paths);
+void OpenPathsFromPolyTree(PolyTree& polytree, Paths& paths);
+
+void ReversePath(Path& p);
+void ReversePaths(Paths& p);
+
+struct IntRect { cInt left; cInt top; cInt right; cInt bottom; };
+
+//enums that are used internally ...
+enum EdgeSide { esLeft = 1, esRight = 2};
+
+//forward declarations (for stuff used internally) ...
+struct TEdge;
+struct IntersectNode;
+struct LocalMinimum;
+struct OutPt;
+struct OutRec;
+struct Join;
+
+typedef std::vector < OutRec* > PolyOutList;
+typedef std::vector < TEdge* > EdgeList;
+typedef std::vector < Join* > JoinList;
+typedef std::vector < IntersectNode* > IntersectList;
+
+//------------------------------------------------------------------------------
+
+//ClipperBase is the ancestor to the Clipper class. It should not be
+//instantiated directly. This class simply abstracts the conversion of sets of
+//polygon coordinates into edge objects that are stored in a LocalMinima list.
+class ClipperBase
+{
+public:
+  ClipperBase();
+  virtual ~ClipperBase();
+  virtual bool AddPath(const Path &pg, PolyType PolyTyp, bool Closed);
+  bool AddPaths(const Paths &ppg, PolyType PolyTyp, bool Closed);
+  virtual void Clear();
+  IntRect GetBounds();
+  bool PreserveCollinear() {return m_PreserveCollinear;};
+  void PreserveCollinear(bool value) {m_PreserveCollinear = value;};
+protected:
+  void DisposeLocalMinimaList();
+  TEdge* AddBoundsToLML(TEdge *e, bool IsClosed);
+  virtual void Reset();
+  TEdge* ProcessBound(TEdge* E, bool IsClockwise);
+  void InsertScanbeam(const cInt Y);
+  bool PopScanbeam(cInt &Y);
+  bool LocalMinimaPending();
+  bool PopLocalMinima(cInt Y, const LocalMinimum *&locMin);
+  OutRec* CreateOutRec();
+  void DisposeAllOutRecs();
+  void DisposeOutRec(PolyOutList::size_type index);
+  void SwapPositionsInAEL(TEdge *edge1, TEdge *edge2);
+  void DeleteFromAEL(TEdge *e);
+  void UpdateEdgeIntoAEL(TEdge *&e);
+
+  typedef std::vector<LocalMinimum> MinimaList;
+  MinimaList::iterator m_CurrentLM;
+  MinimaList           m_MinimaList;
+
+  bool              m_UseFullRange;
+  EdgeList          m_edges;
+  bool              m_PreserveCollinear;
+  bool              m_HasOpenPaths;
+  PolyOutList       m_PolyOuts;
+  TEdge           *m_ActiveEdges;
+
+  typedef std::priority_queue<cInt> ScanbeamList;
+  ScanbeamList     m_Scanbeam;
+};
+//------------------------------------------------------------------------------
+
+class Clipper : public virtual ClipperBase
+{
+public:
+  Clipper(int initOptions = 0);
+  bool Execute(ClipType clipType,
+      Paths &solution,
+      PolyFillType fillType = pftEvenOdd);
+  bool Execute(ClipType clipType,
+      Paths &solution,
+      PolyFillType subjFillType,
+      PolyFillType clipFillType);
+  bool Execute(ClipType clipType,
+      PolyTree &polytree,
+      PolyFillType fillType = pftEvenOdd);
+  bool Execute(ClipType clipType,
+      PolyTree &polytree,
+      PolyFillType subjFillType,
+      PolyFillType clipFillType);
+  bool ReverseSolution() { return m_ReverseOutput; };
+  void ReverseSolution(bool value) {m_ReverseOutput = value;};
+  bool StrictlySimple() {return m_StrictSimple;};
+  void StrictlySimple(bool value) {m_StrictSimple = value;};
+  //set the callback function for z value filling on intersections (otherwise Z is 0)
+#ifdef use_xyz
+  void ZFillFunction(ZFillCallback zFillFunc);
+#endif
+protected:
+  virtual bool ExecuteInternal();
+private:
+  JoinList         m_Joins;
+  JoinList         m_GhostJoins;
+  IntersectList    m_IntersectList;
+  ClipType         m_ClipType;
+  typedef std::list<cInt> MaximaList;
+  MaximaList       m_Maxima;
+  TEdge           *m_SortedEdges;
+  bool             m_ExecuteLocked;
+  PolyFillType     m_ClipFillType;
+  PolyFillType     m_SubjFillType;
+  bool             m_ReverseOutput;
+  bool             m_UsingPolyTree; 
+  bool             m_StrictSimple;
+#ifdef use_xyz
+  ZFillCallback   m_ZFill; //custom callback 
+#endif
+  void SetWindingCount(TEdge& edge);
+  bool IsEvenOddFillType(const TEdge& edge) const;
+  bool IsEvenOddAltFillType(const TEdge& edge) const;
+  void InsertLocalMinimaIntoAEL(const cInt botY);
+  void InsertEdgeIntoAEL(TEdge *edge, TEdge* startEdge);
+  void AddEdgeToSEL(TEdge *edge);
+  bool PopEdgeFromSEL(TEdge *&edge);
+  void CopyAELToSEL();
+  void DeleteFromSEL(TEdge *e);
+  void SwapPositionsInSEL(TEdge *edge1, TEdge *edge2);
+  bool IsContributing(const TEdge& edge) const;
+  bool IsTopHorz(const cInt XPos);
+  void DoMaxima(TEdge *e);
+  void ProcessHorizontals();
+  void ProcessHorizontal(TEdge *horzEdge);
+  void AddLocalMaxPoly(TEdge *e1, TEdge *e2, const IntPoint &pt);
+  OutPt* AddLocalMinPoly(TEdge *e1, TEdge *e2, const IntPoint &pt);
+  OutRec* GetOutRec(int idx);
+  void AppendPolygon(TEdge *e1, TEdge *e2);
+  void IntersectEdges(TEdge *e1, TEdge *e2, IntPoint &pt);
+  OutPt* AddOutPt(TEdge *e, const IntPoint &pt);
+  OutPt* GetLastOutPt(TEdge *e);
+  bool ProcessIntersections(const cInt topY);
+  void BuildIntersectList(const cInt topY);
+  void ProcessIntersectList();
+  void ProcessEdgesAtTopOfScanbeam(const cInt topY);
+  void BuildResult(Paths& polys);
+  void BuildResult2(PolyTree& polytree);
+  void SetHoleState(TEdge *e, OutRec *outrec);
+  void DisposeIntersectNodes();
+  bool FixupIntersectionOrder();
+  void FixupOutPolygon(OutRec &outrec);
+  void FixupOutPolyline(OutRec &outrec);
+  bool IsHole(TEdge *e);
+  bool FindOwnerFromSplitRecs(OutRec &outRec, OutRec *&currOrfl);
+  void FixHoleLinkage(OutRec &outrec);
+  void AddJoin(OutPt *op1, OutPt *op2, const IntPoint offPt);
+  void ClearJoins();
+  void ClearGhostJoins();
+  void AddGhostJoin(OutPt *op, const IntPoint offPt);
+  bool JoinPoints(Join *j, OutRec* outRec1, OutRec* outRec2);
+  void JoinCommonEdges();
+  void DoSimplePolygons();
+  void FixupFirstLefts1(OutRec* OldOutRec, OutRec* NewOutRec);
+  void FixupFirstLefts2(OutRec* InnerOutRec, OutRec* OuterOutRec);
+  void FixupFirstLefts3(OutRec* OldOutRec, OutRec* NewOutRec);
+#ifdef use_xyz
+  void SetZ(IntPoint& pt, TEdge& e1, TEdge& e2);
+#endif
+};
+//------------------------------------------------------------------------------
+
+class ClipperOffset 
+{
+public:
+  ClipperOffset(double miterLimit = 2.0, double roundPrecision = 0.25);
+  ~ClipperOffset();
+  void AddPath(const Path& path, JoinType joinType, EndType endType);
+  void AddPaths(const Paths& paths, JoinType joinType, EndType endType);
+  void Execute(Paths& solution, double delta);
+  void Execute(PolyTree& solution, double delta);
+  void Clear();
+  double MiterLimit;
+  double ArcTolerance;
+private:
+  Paths m_destPolys;
+  Path m_srcPoly;
+  Path m_destPoly;
+  std::vector<DoublePoint> m_normals;
+  double m_delta, m_sinA, m_sin, m_cos;
+  double m_miterLim, m_StepsPerRad;
+  IntPoint m_lowest;
+  PolyNode m_polyNodes;
+
+  void FixOrientations();
+  void DoOffset(double delta);
+  void OffsetPoint(int j, int& k, JoinType jointype);
+  void DoSquare(int j, int k);
+  void DoMiter(int j, int k, double r);
+  void DoRound(int j, int k);
+};
+//------------------------------------------------------------------------------
+
+class clipperException : public std::exception
+{
+  public:
+    clipperException(const char* description): m_descr(description) {}
+    virtual ~clipperException() throw() {}
+    virtual const char* what() const throw() {return m_descr.c_str();}
+  private:
+    std::string m_descr;
+};
+//------------------------------------------------------------------------------
+
+} //ClipperLib namespace
+
+#endif //clipper_hpp
+
+

libs/clipper/cmake_install.cmake

+# Install script for directory: /home/valentin/Desktop/drones/qgroundcontrol/libs/clipper
+
+# Set the install prefix
+if(NOT DEFINED CMAKE_INSTALL_PREFIX)
+  set(CMAKE_INSTALL_PREFIX "/usr/local")
+endif()
+string(REGEX REPLACE "/$" "" CMAKE_INSTALL_PREFIX "${CMAKE_INSTALL_PREFIX}")
+
+# Set the install configuration name.
+if(NOT DEFINED CMAKE_INSTALL_CONFIG_NAME)
+  if(BUILD_TYPE)
+    string(REGEX REPLACE "^[^A-Za-z0-9_]+" ""
+           CMAKE_INSTALL_CONFIG_NAME "${BUILD_TYPE}")
+  else()
+    set(CMAKE_INSTALL_CONFIG_NAME "")
+  endif()
+  message(STATUS "Install configuration: \"${CMAKE_INSTALL_CONFIG_NAME}\"")
+endif()
+
+# Set the component getting installed.
+if(NOT CMAKE_INSTALL_COMPONENT)
+  if(COMPONENT)
+    message(STATUS "Install component: \"${COMPONENT}\"")
+    set(CMAKE_INSTALL_COMPONENT "${COMPONENT}")
+  else()
+    set(CMAKE_INSTALL_COMPONENT)
+  endif()
+endif()
+
+# Install shared libraries without execute permission?
+if(NOT DEFINED CMAKE_INSTALL_SO_NO_EXE)
+  set(CMAKE_INSTALL_SO_NO_EXE "1")
+endif()
+
+# Is this installation the result of a crosscompile?
+if(NOT DEFINED CMAKE_CROSSCOMPILING)
+  set(CMAKE_CROSSCOMPILING "FALSE")
+endif()
+
+if("x${CMAKE_INSTALL_COMPONENT}x" STREQUAL "xUnspecifiedx" OR NOT CMAKE_INSTALL_COMPONENT)
+  list(APPEND CMAKE_ABSOLUTE_DESTINATION_FILES
+   "/usr/local/include/polyclipping/clipper.hpp")
+  if(CMAKE_WARN_ON_ABSOLUTE_INSTALL_DESTINATION)
+    message(WARNING "ABSOLUTE path INSTALL DESTINATION : ${CMAKE_ABSOLUTE_DESTINATION_FILES}")
+  endif()
+  if(CMAKE_ERROR_ON_ABSOLUTE_INSTALL_DESTINATION)
+    message(FATAL_ERROR "ABSOLUTE path INSTALL DESTINATION forbidden (by caller): ${CMAKE_ABSOLUTE_DESTINATION_FILES}")
+  endif()
+file(INSTALL DESTINATION "/usr/local/include/polyclipping" TYPE FILE FILES "/home/valentin/Desktop/drones/qgroundcontrol/libs/clipper/clipper.hpp")
+endif()
+
+if("x${CMAKE_INSTALL_COMPONENT}x" STREQUAL "xUnspecifiedx" OR NOT CMAKE_INSTALL_COMPONENT)
+  foreach(file
+      "$ENV{DESTDIR}/usr/local/lib/libpolyclipping.so.22.0.0"
+      "$ENV{DESTDIR}/usr/local/lib/libpolyclipping.so.22"
+      "$ENV{DESTDIR}/usr/local/lib/libpolyclipping.so"
+      )
+    if(EXISTS "${file}" AND
+       NOT IS_SYMLINK "${file}")
+      file(RPATH_CHECK
+           FILE "${file}"
+           RPATH "")
+    endif()
+  endforeach()
+  list(APPEND CMAKE_ABSOLUTE_DESTINATION_FILES
+   "/usr/local/lib/libpolyclipping.so.22.0.0;/usr/local/lib/libpolyclipping.so.22;/usr/local/lib/libpolyclipping.so")
+  if(CMAKE_WARN_ON_ABSOLUTE_INSTALL_DESTINATION)
+    message(WARNING "ABSOLUTE path INSTALL DESTINATION : ${CMAKE_ABSOLUTE_DESTINATION_FILES}")
+  endif()
+  if(CMAKE_ERROR_ON_ABSOLUTE_INSTALL_DESTINATION)
+    message(FATAL_ERROR "ABSOLUTE path INSTALL DESTINATION forbidden (by caller): ${CMAKE_ABSOLUTE_DESTINATION_FILES}")
+  endif()
+file(INSTALL DESTINATION "/usr/local/lib" TYPE SHARED_LIBRARY FILES
+    "/home/valentin/Desktop/drones/qgroundcontrol/libs/clipper/libpolyclipping.so.22.0.0"
+    "/home/valentin/Desktop/drones/qgroundcontrol/libs/clipper/libpolyclipping.so.22"
+    "/home/valentin/Desktop/drones/qgroundcontrol/libs/clipper/libpolyclipping.so"
+    )
+  foreach(file
+      "$ENV{DESTDIR}/usr/local/lib/libpolyclipping.so.22.0.0"
+      "$ENV{DESTDIR}/usr/local/lib/libpolyclipping.so.22"
+      "$ENV{DESTDIR}/usr/local/lib/libpolyclipping.so"
+      )
+    if(EXISTS "${file}" AND
+       NOT IS_SYMLINK "${file}")
+      if(CMAKE_INSTALL_DO_STRIP)
+        execute_process(COMMAND "/usr/bin/strip" "${file}")
+      endif()
+    endif()
+  endforeach()
+endif()
+
+if("x${CMAKE_INSTALL_COMPONENT}x" STREQUAL "xUnspecifiedx" OR NOT CMAKE_INSTALL_COMPONENT)
+  list(APPEND CMAKE_ABSOLUTE_DESTINATION_FILES
+   "/usr/local/share/pkgconfig/polyclipping.pc")
+  if(CMAKE_WARN_ON_ABSOLUTE_INSTALL_DESTINATION)
+    message(WARNING "ABSOLUTE path INSTALL DESTINATION : ${CMAKE_ABSOLUTE_DESTINATION_FILES}")
+  endif()
+  if(CMAKE_ERROR_ON_ABSOLUTE_INSTALL_DESTINATION)
+    message(FATAL_ERROR "ABSOLUTE path INSTALL DESTINATION forbidden (by caller): ${CMAKE_ABSOLUTE_DESTINATION_FILES}")
+  endif()
+file(INSTALL DESTINATION "/usr/local/share/pkgconfig" TYPE FILE FILES "/home/valentin/Desktop/drones/qgroundcontrol/libs/clipper/polyclipping.pc")
+endif()
+
+if(CMAKE_INSTALL_COMPONENT)
+  set(CMAKE_INSTALL_MANIFEST "install_manifest_${CMAKE_INSTALL_COMPONENT}.txt")
+else()
+  set(CMAKE_INSTALL_MANIFEST "install_manifest.txt")
+endif()
+
+string(REPLACE ";" "\n" CMAKE_INSTALL_MANIFEST_CONTENT
+       "${CMAKE_INSTALL_MANIFEST_FILES}")
+file(WRITE "/home/valentin/Desktop/drones/qgroundcontrol/libs/clipper/${CMAKE_INSTALL_MANIFEST}"
+     "${CMAKE_INSTALL_MANIFEST_CONTENT}")

libs/clipper/polyclipping.pc

+prefix=/usr/local
+exec_prefix=/usr/local
+libdir=/usr/local/lib
+sharedlibdir=/usr/local/lib
+includedir=/usr/local/include/polyclipping
+
+Name: polyclipping
+Description: polygon clipping library
+Version: 
+
+Requires:
+Libs: -L${libdir} -L${sharedlibdir} -lpolyclipping
+Cflags: -I${includedir}

libs/clipper/polyclipping.pc.cmakein

+prefix=@CMAKE_INSTALL_PREFIX@
+exec_prefix=@CMAKE_INSTALL_PREFIX@
+libdir=@CMAKE_INSTALL_LIBDIR@
+sharedlibdir=@CMAKE_INSTALL_LIBDIR@
+includedir=@CMAKE_INSTALL_INCDIR@
+
+Name: polyclipping
+Description: polygon clipping library
+Version: @VERSION@
+
+Requires:
+Libs: -L${libdir} -L${sharedlibdir} -lpolyclipping
+Cflags: -I${includedir}