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The ClipperOffset class encapsulates the process of offsetting (inflating/deflating) both open and closed paths using a number of different join types and end types.
 (This class replaces the now deprecated OffsetPaths function which was less flexible.)
 Preconditions for offsetting:
 1. The orientations of closed paths must be consistent such that outer polygons share the same orientation, and any holes have the opposite orientation (ie non-zero filling). Open paths must be oriented with closed outer polygons.
 2. Polygons must not self-intersect. 
 Limitations:
 When offsetting, small artefacts may appear where polygons overlap. To avoid these artefacts, offset overlapping polygons separately.
  
 
    
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#include "clipper.hpp"  
...
using namespace ClipperLib;
int main()
{
  Path subj;
  Paths solution;
  subj << 
    IntPoint(348,257) << IntPoint(364,148) << IntPoint(362,148) << 
    IntPoint(326,241) << IntPoint(295,219) << IntPoint(258,88) << 
    IntPoint(440,129) << IntPoint(370,196) << IntPoint(372,275);
  ClipperOffset co;
  co.AddPath(subj, jtRound, etClosedPolygon);
  co.Execute(solution, -7.0);
  
  //draw solution ...
  DrawPolygons(solution, 0x4000FF00, 0xFF009900);
}
           | 
| Methods | Properties | 
|---|---|
| In ClipperOffset: | |
| AddPath | ArcTolerance | 
| AddPaths | MiterLimit | 
| Clear | |
| Constructor | |
| Execute | |
 
 Copyright ©2010-2014 Angus Johnson  -   Clipper 6.2.1   -   Help file built on 1-November-2014