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Merge pull request #1512 from olasd/bugfix/clipper-rounding

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Fix rounding error in clipper.cpp
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Alessandro Ranellucci 2013-11-03 16:40:56 -08:00
commit 7e8c535f6a
1 changed files with 4 additions and 4 deletions
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8
xs/src/clipper.cpp
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@ -3335,11 +3335,11 @@ void DoSquare(double mul)
a1 = std::fabs(a2 - a1); a1 = std::fabs(a2 - a1);
if (a1 > pi) a1 = pi * 2 - a1; if (a1 > pi) a1 = pi * 2 - a1;
double dx = std::tan((pi - a1) / 4) * std::fabs(m_delta * mul); double dx = std::tan((pi - a1) / 4) * std::fabs(m_delta * mul);
pt1 = IntPoint((long64)(pt1.X -normals[m_k].Y * dx), pt1 = IntPoint((long64)Round(pt1.X -normals[m_k].Y * dx),
(long64)(pt1.Y + normals[m_k].X * dx)); (long64)Round(pt1.Y + normals[m_k].X * dx));
AddPoint(pt1); AddPoint(pt1);
pt2 = IntPoint((long64)(pt2.X + normals[m_j].Y * dx), pt2 = IntPoint((long64)Round(pt2.X + normals[m_j].Y * dx),
(long64)(pt2.Y -normals[m_j].X * dx)); (long64)Round(pt2.Y -normals[m_j].X * dx));
AddPoint(pt2); AddPoint(pt2);
} }
else else