// first goes in then out to get capped corners
vector<Poly> Clipping::getShrinkedCapped(const vector<Poly> &polys, double distance,
JoinType jtype, double miterdist)
{
CL::Polygons cpolys = getClipperPolygons(polys);
CL::Polygons offset1 = CLOffset(cpolys, -2*CL_FACTOR*distance, CLType(jtype), 0);// CL::jtRound);
CL::Polygons offset = CLOffset(offset1, 1*CL_FACTOR*distance, CLType(jtype), 0);
double z=0, extrf=1.;;
if (polys.size()>0) {
z= polys.back().getZ();
extrf = polys.back().getExtrusionFactor();
}
return getPolys(offset,z,extrf);
}
// overlap a bit and unite to merge adjacent polys
CL::Polygons Clipping::getMerged(const CL::Polygons &cpolys, int overlap)
{
CL::Clipper clpr;
// return polys;
// make wider to get overlap
CL::Polygons offset;
offset = CLOffset(cpolys, overlap, CL::jtMiter, 1);
//CL::OffsetPolygons(cpolys, offset, 10, ClipperLib::jtMiter, 1);
// return getPolys(offset, polys.back().getZ(),polys.back().getExtrusionFactor());
clpr.AddPolygons(offset, CL::ptSubject);
CL::Polygons cpolys3;
clpr.Execute(CL::ctUnion, cpolys3, CL::pftEvenOdd, CL::pftEvenOdd);
//cerr << cpolys3.size() << " - "<<offset.size() << endl;
// shrink the result
return CLOffset(cpolys3, -overlap, CL::jtMiter, 1);
}
vector<Poly> Clipping::getOffset(const Poly &poly, double distance,
JoinType jtype, double miterdist)
{
CL::Polygons cpolys(1); cpolys[0]=getClipperPolygon(poly);
CL::Polygons offset = CLOffset(cpolys, CL_FACTOR*distance, CLType(jtype), miterdist);
return getPolys(offset, poly.getZ(), poly.getExtrusionFactor());
}
vector<Poly> Clipping::getOffset(const vector<Poly> &polys, double distance,
JoinType jtype, double miterdist)
{
CL::Paths cpolys = getClipperPolygons(polys);
CL::Paths offset = CLOffset(cpolys, CL_FACTOR*distance, CLType(jtype), miterdist);
double z=0, extrf=1.;;
if (polys.size()>0) {
z = polys.back().getZ();
extrf = polys.back().getExtrusionFactor();
}
return getPolys(offset,z,extrf);
}
