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39 
40 #include "qclipperutils_p.h"
41 
42 QT_BEGIN_NAMESPACE
43 
44 static const double kClipperScaleFactor = 281474976710656.0;  // 48 bits of precision
45 static const double kClipperScaleFactorInv = 1.0 / kClipperScaleFactor;
46 
clipperScaleFactor()47 double QClipperUtils::clipperScaleFactor()
48 {
49     return kClipperScaleFactor;
50 }
51 
toVector2D(const IntPoint & p)52 QDoubleVector2D QClipperUtils::toVector2D(const IntPoint &p)
53 {
54     return QDoubleVector2D(double(p.X) * kClipperScaleFactorInv, double(p.Y) * kClipperScaleFactorInv);
55 }
56 
toIntPoint(const QDoubleVector2D & p)57 IntPoint QClipperUtils::toIntPoint(const QDoubleVector2D &p)
58 {
59     return IntPoint(cInt(p.x() * kClipperScaleFactor), cInt(p.y() * kClipperScaleFactor));
60 }
61 
pathToQList(const Path & path)62 QList<QDoubleVector2D> QClipperUtils::pathToQList(const Path &path)
63 {
64     QList<QDoubleVector2D> res;
65     res.reserve(int(path.size()));
66     for (const IntPoint &ip: path)
67         res.append(toVector2D(ip));
68     return res;
69 }
70 
pathsToQList(const Paths & paths)71 QList<QList<QDoubleVector2D> > QClipperUtils::pathsToQList(const Paths &paths)
72 {
73     QList<QList<QDoubleVector2D> > res;
74     res.reserve(int(paths.size()));
75     for (const Path &p: paths) {
76         res.append(pathToQList(p));
77     }
78     return res;
79 }
80 
qListToPath(const QList<QDoubleVector2D> & list)81 Path QClipperUtils::qListToPath(const QList<QDoubleVector2D> &list)
82 {
83     Path res;
84     res.reserve(list.size());
85     for (const QDoubleVector2D &p: list)
86         res.push_back(toIntPoint(p));
87     return res;
88 }
89 
qListToPaths(const QList<QList<QDoubleVector2D>> & lists)90 Paths QClipperUtils::qListToPaths(const QList<QList<QDoubleVector2D> > &lists)
91 {
92     Paths res;
93     res.reserve(lists.size());
94     for (const QList<QDoubleVector2D> &l: lists) {
95         res.push_back(qListToPath(l));
96     }
97     return res;
98 }
99 
100 QT_END_NAMESPACE
101