#7 Bugfix: when ForceSimplePolygons is enabled, the PolyTree structure could be incorrect (r471)

[Anonymous]

Related to r471 Bugfix: when ForceSimplePolygons is enabled, the PolyTree structure could be incorrect.

Fix is relatively simple. Under Clipper doSimplePolygons, add FixupFirstLefts for all three conditions (like in JoinCommonEdges) (roughly beginning around lines 5023):

if (this.m_UsingPolyTree)
    this.FixupFirstLefts2(outRec2, outrec);
⋮
if (this.m_UsingPolyTree)
    this.FixupFirstLefts2(outrec, outrec2);
⋮
if (this.m_UsingPolyTree)
    this.FixupFirstLefts1(outrec, outrec2);

Can see original fix near bottom of this diff:
http://sourceforge.net/p/polyclipping/code/471/tree//trunk/cpp/clipper.cpp?diff=504b9404fd48f873331e913b:470

[Timo Kähkönen]

This is fixed in 6.2.1.0.