qt-everywhere-src-5.14.1/qtlocation/src/positioning/qclipperutils.cpp

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#include "qclipperutils_p.h"

QT_BEGIN_NAMESPACE

static const double kClipperScaleFactor = 281474976710656.0;  // 48 bits of precision
static const double kClipperScaleFactorInv = 1.0 / kClipperScaleFactor;

double QClipperUtils::clipperScaleFactor()
{
    return kClipperScaleFactor;
}

QDoubleVector2D QClipperUtils::toVector2D(const IntPoint &p)
{
    return QDoubleVector2D(double(p.X) * kClipperScaleFactorInv, double(p.Y) * kClipperScaleFactorInv);
}

IntPoint QClipperUtils::toIntPoint(const QDoubleVector2D &p)
{
    return IntPoint(cInt(p.x() * kClipperScaleFactor), cInt(p.y() * kClipperScaleFactor));
}

QList<QDoubleVector2D> QClipperUtils::pathToQList(const Path &path)
{
    QList<QDoubleVector2D> res;
    res.reserve(int(path.size()));
    for (const IntPoint &ip: path)
        res.append(toVector2D(ip));
    return res;
}

QList<QList<QDoubleVector2D> > QClipperUtils::pathsToQList(const Paths &paths)
{
    QList<QList<QDoubleVector2D> > res;
    res.reserve(int(paths.size()));
    for (const Path &p: paths) {
        res.append(pathToQList(p));
    }
    return res;
}

Path QClipperUtils::qListToPath(const QList<QDoubleVector2D> &list)
{
    Path res;
    res.reserve(list.size());
    for (const QDoubleVector2D &p: list)
        res.push_back(toIntPoint(p));
    return res;
}

Paths QClipperUtils::qListToPaths(const QList<QList<QDoubleVector2D> > &lists)
{
    Paths res;
    res.reserve(lists.size());
    for (const QList<QDoubleVector2D> &l: lists) {
        res.push_back(qListToPath(l));
    }
    return res;
}

QT_END_NAMESPACE