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Fix issue that z is not properly set in some cases when clipping polygon (#6955)

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Fix issue that `z` is not properly set in some cases when clipping the polygon (SoftFever/OrcaSlicer#6933)

Apply the patch from https://sourceforge.net/p/polyclipping/bugs/160/
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Noisyfox 2024-10-03 23:35:05 +08:00 committed by GitHub
parent 5bb42bc0d5
commit 53b08f213b
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1 changed files with 9 additions and 2 deletions
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11
src/clipper/clipper.cpp
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@ -2290,7 +2290,11 @@ void Clipper::ProcessHorizontal(TEdge *horzEdge)
if (horzEdge->OutIdx >= 0 && !IsOpen) //note: may be done multiple times
{
op1 = AddOutPt(horzEdge, e->Curr);
#ifdef CLIPPERLIB_USE_XYZ
if (dir == dLeftToRight) SetZ(e->Curr, *horzEdge, *e);
else SetZ(e->Curr, *e, *horzEdge);
#endif
op1 = AddOutPt(horzEdge, e->Curr);
TEdge* eNextHorz = m_SortedEdges;
while (eNextHorz)
{
@ -2614,7 +2618,10 @@ void Clipper::ProcessEdgesAtTopOfScanbeam(const cInt topY)
{
e->Curr.x() = TopX( *e, topY );
e->Curr.y() = topY;
}
#ifdef CLIPPERLIB_USE_XYZ
e->Curr.z() = topY == e->Top.y() ? e->Top.z() : (topY == e->Bot.y() ? e->Bot.z() : 0);
#endif
}
//When StrictlySimple and 'e' is being touched by another edge, then
//make sure both edges have a vertex here ...