source: trunk/src/gui/math3d/qvector2d.h@ 944

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#ifndef QVECTOR2D_H
#define QVECTOR2D_H

#include <QtCore/qpoint.h>
#include <QtCore/qmetatype.h>

QT_BEGIN_HEADER

QT_BEGIN_NAMESPACE

QT_MODULE(Gui)

class QVector3D;
class QVector4D;
class QVariant;

#ifndef QT_NO_VECTOR2D

class Q_GUI_EXPORT QVector2D
{
public:
    QVector2D();
    QVector2D(qreal xpos, qreal ypos);
    explicit QVector2D(const QPoint& point);
    explicit QVector2D(const QPointF& point);
#ifndef QT_NO_VECTOR3D
    explicit QVector2D(const QVector3D& vector);
#endif
#ifndef QT_NO_VECTOR4D
    explicit QVector2D(const QVector4D& vector);
#endif

    bool isNull() const;

    qreal x() const;
    qreal y() const;

    void setX(qreal x);
    void setY(qreal y);

    qreal length() const;
    qreal lengthSquared() const;

    QVector2D normalized() const;
    void normalize();

    QVector2D &operator+=(const QVector2D &vector);
    QVector2D &operator-=(const QVector2D &vector);
    QVector2D &operator*=(qreal factor);
    QVector2D &operator*=(const QVector2D &vector);
    QVector2D &operator/=(qreal divisor);

    static qreal dotProduct(const QVector2D& v1, const QVector2D& v2);

    friend inline bool operator==(const QVector2D &v1, const QVector2D &v2);
    friend inline bool operator!=(const QVector2D &v1, const QVector2D &v2);
    friend inline const QVector2D operator+(const QVector2D &v1, const QVector2D &v2);
    friend inline const QVector2D operator-(const QVector2D &v1, const QVector2D &v2);
    friend inline const QVector2D operator*(qreal factor, const QVector2D &vector);
    friend inline const QVector2D operator*(const QVector2D &vector, qreal factor);
    friend inline const QVector2D operator*(const QVector2D &v1, const QVector2D &v2);
    friend inline const QVector2D operator-(const QVector2D &vector);
    friend inline const QVector2D operator/(const QVector2D &vector, qreal divisor);

    friend inline bool qFuzzyCompare(const QVector2D& v1, const QVector2D& v2);

#ifndef QT_NO_VECTOR3D
    QVector3D toVector3D() const;
#endif
#ifndef QT_NO_VECTOR4D
    QVector4D toVector4D() const;
#endif

    QPoint toPoint() const;
    QPointF toPointF() const;

    operator QVariant() const;

private:
    float xp, yp;

    QVector2D(float xpos, float ypos, int dummy);

    friend class QVector3D;