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    41 

    42 #ifndef QVECTOR2D_H

    43 #define QVECTOR2D_H

    44 

    45 #include <QtCore/qpoint.h>

    46 #include <QtCore/qmetatype.h>

    47 

    48 QT_BEGIN_HEADER

    49 

    50 QT_BEGIN_NAMESPACE

    51 

    52 QT_MODULE(Gui)

    53 

    54 class QVector3D;

    55 class QVector4D;

    56 class QVariant;

    57 

    58 #ifndef QT_NO_VECTOR2D

    59 

    60 class Q_GUI_EXPORT QVector2D

    61 {

    62 public:

    63     QVector2D();

    64     QVector2D(qreal xpos, qreal ypos);

    65     explicit QVector2D(const QPoint& point);

    66     explicit QVector2D(const QPointF& point);

    67 #ifndef QT_NO_VECTOR3D

    68     explicit QVector2D(const QVector3D& vector);

    69 #endif

    70 #ifndef QT_NO_VECTOR4D

    71     explicit QVector2D(const QVector4D& vector);

    72 #endif

    73 

    74     bool isNull() const;

    75 

    76     qreal x() const;

    77     qreal y() const;

    78 

    79     void setX(qreal x);

    80     void setY(qreal y);

    81 

    82     qreal length() const;

    83     qreal lengthSquared() const;

    84 

    85     QVector2D normalized() const;

    86     void normalize();

    87 

    88     QVector2D &operator+=(const QVector2D &vector);

    89     QVector2D &operator-=(const QVector2D &vector);

    90     QVector2D &operator*=(qreal factor);

    91     QVector2D &operator*=(const QVector2D &vector);

    92     QVector2D &operator/=(qreal divisor);

    93 

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

    95 

    96     friend inline bool operator==(const QVector2D &v1, const QVector2D &v2);

    97     friend inline bool operator!=(const QVector2D &v1, const QVector2D &v2);

    98     friend inline const QVector2D operator+(const QVector2D &v1, const QVector2D &v2);

    99     friend inline const QVector2D operator-(const QVector2D &v1, const QVector2D &v2);

   100     friend inline const QVector2D operator*(qreal factor, const QVector2D &vector);

   101     friend inline const QVector2D operator*(const QVector2D &vector, qreal factor);

   102     friend inline const QVector2D operator*(const QVector2D &v1, const QVector2D &v2);

   103     friend inline const QVector2D operator-(const QVector2D &vector);

   104     friend inline const QVector2D operator/(const QVector2D &vector, qreal divisor);

   105 

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

   107 

   108 #ifndef QT_NO_VECTOR3D

   109     QVector3D toVector3D() const;

   110 #endif

   111 #ifndef QT_NO_VECTOR4D

   112     QVector4D toVector4D() const;

   113 #endif

   114 

   115     QPoint toPoint() const;

   116     QPointF toPointF() const;

   117 

   118     operator QVariant() const;

   119 

   120 private:

   121     float xp, yp;

   122 

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

   124 

   125     friend class QVector3D;

   126     friend class QVector4D;

   127 };

   128 

   129 inline QVector2D::QVector2D() : xp(0.0f), yp(0.0f) {}

   130 

   131 inline QVector2D::QVector2D(float xpos, float ypos, int) : xp(xpos), yp(ypos) {}

   132 

   133 inline QVector2D::QVector2D(qreal xpos, qreal ypos) : xp(xpos), yp(ypos) {}

   134 

   135 inline QVector2D::QVector2D(const QPoint& point) : xp(point.x()), yp(point.y()) {}

   136 

   137 inline QVector2D::QVector2D(const QPointF& point) : xp(point.x()), yp(point.y()) {}

   138 

   139 inline bool QVector2D::isNull() const

   140 {

   141     return qIsNull(xp) && qIsNull(yp);

   142 }

   143 

   144 inline qreal QVector2D::x() const { return qreal(xp); }

   145 inline qreal QVector2D::y() const { return qreal(yp); }

   146 

   147 inline void QVector2D::setX(qreal aX) { xp = aX; }

   148 inline void QVector2D::setY(qreal aY) { yp = aY; }

   149 

   150 inline QVector2D &QVector2D::operator+=(const QVector2D &vector)

   151 {

   152     xp += vector.xp;

   153     yp += vector.yp;

   154     return *this;

   155 }

   156 

   157 inline QVector2D &QVector2D::operator-=(const QVector2D &vector)

   158 {

   159     xp -= vector.xp;

   160     yp -= vector.yp;

   161     return *this;

   162 }

   163 

   164 inline QVector2D &QVector2D::operator*=(qreal factor)

   165 {

   166     xp *= factor;

   167     yp *= factor;

   168     return *this;

   169 }

   170 

   171 inline QVector2D &QVector2D::operator*=(const QVector2D &vector)

   172 {

   173     xp *= vector.xp;

   174     yp *= vector.yp;

   175     return *this;

   176 }

   177 

   178 inline QVector2D &QVector2D::operator/=(qreal divisor)

   179 {

   180     xp /= divisor;

   181     yp /= divisor;

   182     return *this;

   183 }

   184 

   185 inline bool operator==(const QVector2D &v1, const QVector2D &v2)

   186 {

   187     return v1.xp == v2.xp && v1.yp == v2.yp;

   188 }

   189 

   190 inline bool operator!=(const QVector2D &v1, const QVector2D &v2)

   191 {

   192     return v1.xp != v2.xp || v1.yp != v2.yp;

   193 }

   194 

   195 inline const QVector2D operator+(const QVector2D &v1, const QVector2D &v2)

   196 {

   197     return QVector2D(v1.xp + v2.xp, v1.yp + v2.yp, 1);

   198 }

   199 

   200 inline const QVector2D operator-(const QVector2D &v1, const QVector2D &v2)

   201 {

   202     return QVector2D(v1.xp - v2.xp, v1.yp - v2.yp, 1);

   203 }

   204 

   205 inline const QVector2D operator*(qreal factor, const QVector2D &vector)

   206 {

   207     return QVector2D(vector.xp * factor, vector.yp * factor, 1);

   208 }

   209 

   210 inline const QVector2D operator*(const QVector2D &vector, qreal factor)

   211 {

   212     return QVector2D(vector.xp * factor, vector.yp * factor, 1);

   213 }

   214 

   215 inline const QVector2D operator*(const QVector2D &v1, const QVector2D &v2)

   216 {

   217     return QVector2D(v1.xp * v2.xp, v1.yp * v2.yp, 1);

   218 }

   219 

   220 inline const QVector2D operator-(const QVector2D &vector)

   221 {

   222     return QVector2D(-vector.xp, -vector.yp, 1);

   223 }

   224 

   225 inline const QVector2D operator/(const QVector2D &vector, qreal divisor)

   226 {

   227     return QVector2D(vector.xp / divisor, vector.yp / divisor, 1);

   228 }

   229 

   230 inline bool qFuzzyCompare(const QVector2D& v1, const QVector2D& v2)

   231 {

   232     return qFuzzyCompare(v1.xp, v2.xp) && qFuzzyCompare(v1.yp, v2.yp);

   233 }

   234 

   235 inline QPoint QVector2D::toPoint() const

   236 {

   237     return QPoint(qRound(xp), qRound(yp));

   238 }

   239 

   240 inline QPointF QVector2D::toPointF() const

   241 {

   242     return QPointF(qreal(xp), qreal(yp));

   243 }

   244 

   245 #ifndef QT_NO_DEBUG_STREAM

   246 Q_GUI_EXPORT QDebug operator<<(QDebug dbg, const QVector2D &vector);

   247 #endif

   248 

   249 #ifndef QT_NO_DATASTREAM

   250 Q_GUI_EXPORT QDataStream &operator<<(QDataStream &, const QVector2D &);

   251 Q_GUI_EXPORT QDataStream &operator>>(QDataStream &, QVector2D &);

   252 #endif

   253 

   254 #endif

   255 

   256 QT_END_NAMESPACE

   257 

   258 QT_END_HEADER

   259 

   260 #endif