From f7b4cc602b9a646fbc66f3f17d6bb9c20efc3ead Mon Sep 17 00:00:00 2001 From: jaseg Date: Sun, 24 Jan 2021 18:44:56 +0100 Subject: Initial commit --- .../Documentation/Docs/Overview/Example.htm | 234 +++++++++++++++++++++ 1 file changed, 234 insertions(+) create mode 100644 upstream/clipper-6.4.2/Documentation/Docs/Overview/Example.htm (limited to 'upstream/clipper-6.4.2/Documentation/Docs/Overview/Example.htm') diff --git a/upstream/clipper-6.4.2/Documentation/Docs/Overview/Example.htm b/upstream/clipper-6.4.2/Documentation/Docs/Overview/Example.htm new file mode 100644 index 0000000..ded5dd5 --- /dev/null +++ b/upstream/clipper-6.4.2/Documentation/Docs/Overview/Example.htm @@ -0,0 +1,234 @@ + + + + + + + + + + + + + + + + + + + + Example + + + + + + + + + + + + + + + + + + + + + +

Example

+ + + + + + + + + +
Delphi Code Sample: +
+ + 
+  uses
+    graphics32, clipper;
+  
+  function GetEllipsePoints(bounds: TIntRect): TPath;
+  begin
+    //code to create an elliptical polygon here
+  end;
+	
+  procedure DrawPolygons(polys: TPaths; color: TColor32);
+  begin
+    //code to display the polygons here
+  end;
+	
+  var
+    sub, clp, sol: TPaths;
+  begin
+
+    //set up the subject and clip polygons ...
+    setlength(sub, 3);
+    sub[0] := GetEllipsePoints(IntRect(100,100,300,300));
+    sub[1] := GetEllipsePoints(IntRect(125,130,275,180));
+    sub[2] := GetEllipsePoints(IntRect(125,220,275,270));
+	
+    setlength(clp, 1);
+    clp[0] := GetEllipsePoints(IntRect(140,70,220,320));
+
+    //display the subject and clip polygons ...
+    DrawPolygons(sub, 0x8033FFFF);
+    DrawPolygons(clp, 0x80FFFF33);
+    
+    //get the intersection of the subject and clip polygons ...
+    with TClipper.Create do
+    try
+      AddPaths(sub, ptSubject, true);
+      AddPaths(clp, ptClip, true);
+      Execute(ctIntersection, sol, pftEvenOdd, pftEvenOdd);
+    finally
+      free;
+    end;
+    
+    //finally draw the intersection polygons ...
+    DrawPolygons(sol, 0x40808080);
+
+ +
+
 
+ + + + + + + + + + +
C++ Code Sample: +
+ + 
+  #include "clipper.hpp"
+  
+  ...
+
+  //from clipper.hpp ...
+  //typedef long long cInt;
+  //struct IntPoint {cInt X; cInt Y;};
+  //typedef std::vector<IntPoint> Path;
+  //typedef std::vector<Polygon> Paths;
+
+  using namespace ClipperLib;
+
+  void GetEllipsePoints(IntRect& bounds, Path& p)
+  {/* ... */}
+  
+  void DrawPolygons(Paths& p, unsigned color)
+  {/* ... */}
+  
+  int main()
+  {
+    //set up the subject and clip polygons ...
+    Paths sub(3);
+    GetEllipsePoints(IntRect(100,100,300,300), sub[0]);
+    GetEllipsePoints(IntRect(125,130,275,180), sub[1]);
+    GetEllipsePoints(IntRect(125,220,275,270), sub[2]);
+    
+    Paths clp(1);
+    GetEllipsePoints(IntRect(140,70,220,320), clp[0]);
+    
+    //display the subject and clip polygons ...
+    DrawPolygons(sub, 0x8033FFFF);
+    DrawPolygons(clp, 0x80FFFF33);
+    
+    //get the intersection of the subject and clip polygons ...
+    Clipper clpr;
+    clpr.AddPaths(sub, ptSubject, true);
+    clpr.AddPaths(clp, ptClip, true);
+    Paths solution;
+    clpr.Execute(ctIntersection, solution, pftEvenOdd, pftEvenOdd);
+    
+    //finally draw the intersection polygons ...
+    DrawPolygons(solution, 0x40808080);
+  }
+
+ + +
+
 
+ + + + + + + + + +
C# Code Sample: +
+ + 
+  ...
+  using ClipperLib;
+	
+  ...
+  using Path = List<IntPoint>;
+  using Paths = List<List<IntPoint>>;
+  
+  static Path GetEllipsePoints(IntRect bounds)
+  {/* ... */}
+  
+  static void DrawPolygons(Path p, uint color)
+  {/* ... */}
+  
+  static void Main(string[] args)
+  {
+    Paths subjs = new Paths(3);
+    subjs.Add(GetEllipsePoints(new IntRect(100,100,300,300)));
+    subjs.Add(GetEllipsePoints(new IntRect(125,130,275,180)));
+    subjs.Add(GetEllipsePoints(new IntRect(125,220,275,270)));
+    
+    Paths clips = new Paths(1);
+    clips.Add(GetEllipsePoints(new IntRect(140,70,220,320)));
+    
+    DrawPolygons(subjs, 0x8033FFFF);
+    DrawPolygons(clips, 0x80FFFF33);
+    
+    Paths solution = new Paths();
+    Clipper c = new Clipper();
+    c.AddPaths(subjs, PolyType.ptSubject, true);
+    c.AddPaths(clips, PolyType.ptClip, true);
+    c.Execute(ClipType.ctIntersection, solution);
+    
+    DrawPolygons(solution, 0x40808080);
+  }
+
+ +
+ +
 
+ + + + + + + + + + \ No newline at end of file -- cgit