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[QtGui module]

The QVector2D class represents a vector or vertex in 2D space. More...

#include <QVector2D>

This class was introduced in Qt 4.6.

QVector2D () | |

QVector2D ( qreal xpos, qreal ypos ) | |

QVector2D ( const QPoint & point ) | |

QVector2D ( const QPointF & point ) | |

QVector2D ( const QVector3D & vector ) | |

QVector2D ( const QVector4D & vector ) | |

bool | isNull () const |

qreal | length () const |

qreal | lengthSquared () const |

void | normalize () |

QVector2D | normalized () const |

void | setX ( qreal x ) |

void | setY ( qreal y ) |

QPoint | toPoint () const |

QPointF | toPointF () const |

QVector3D | toVector3D () const |

QVector4D | toVector4D () const |

qreal | x () const |

qreal | y () const |

operator QVariant () const | |

QVector2D & | operator*= ( qreal factor ) |

QVector2D & | operator*= ( const QVector2D & vector ) |

QVector2D & | operator+= ( const QVector2D & vector ) |

QVector2D & | operator-= ( const QVector2D & vector ) |

QVector2D & | operator/= ( qreal divisor ) |

qreal | dotProduct ( const QVector2D & v1, const QVector2D & v2 ) |

bool | qFuzzyCompare ( const QVector2D & v1, const QVector2D & v2 ) |

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

const QVector2D | operator* ( qreal factor, const QVector2D & vector ) |

const QVector2D | operator* ( const QVector2D & vector, qreal factor ) |

const QVector2D | operator* ( const QVector2D & v1, const QVector2D & v2 ) |

const QVector2D | operator+ ( const QVector2D & v1, const QVector2D & v2 ) |

const QVector2D | operator- ( const QVector2D & v1, const QVector2D & v2 ) |

const QVector2D | operator- ( const QVector2D & vector ) |

const QVector2D | operator/ ( const QVector2D & vector, qreal divisor ) |

QDataStream & | operator<< ( QDataStream & stream, const QVector2D & vector ) |

bool | operator== ( const QVector2D & v1, const QVector2D & v2 ) |

QDataStream & | operator>> ( QDataStream & stream, QVector2D & vector ) |

The QVector2D class represents a vector or vertex in 2D space.

The QVector2D class can also be used to represent vertices in 2D space. We therefore do not need to provide a separate vertex class.

See also QVector3D, QVector4D, and QQuaternion.

Constructs a null vector, i.e. with coordinates (0, 0, 0).

Constructs a vector with coordinates (*xpos*, *ypos*).

Constructs a vector with x and y coordinates from a 2D *point*.

Constructs a vector with x and y coordinates from a 2D *point*.

Constructs a vector with x and y coordinates from a 3D *vector*. The z coordinate of *vector* is dropped.

See also toVector3D().

Constructs a vector with x and y coordinates from a 3D *vector*. The z and w coordinates of *vector* are dropped.

See also toVector4D().

Returns the dot product of *v1* and *v2*.

Returns true if the x and y coordinates are set to 0.0, otherwise returns false.

Returns the length of the vector from the origin.

See also lengthSquared() and normalized().

Returns the squared length of the vector from the origin. This is equivalent to the dot product of the vector with itself.

See also length() and dotProduct().

Normalizes the currect vector in place. Nothing happens if this vector is a null vector or the length of the vector is very close to 1.

See also length() and normalized().

Returns the normalized unit vector form of this vector.

If this vector is null, then a null vector is returned. If the length of the vector is very close to 1, then the vector will be returned as-is. Otherwise the normalized form of the vector of length 1 will be returned.

See also length() and normalize().

Sets the x coordinate of this point to the given *x* coordinate.

Sets the y coordinate of this point to the given *y* coordinate.

Returns the QPoint form of this 2D vector.

See also toPointF() and toVector3D().

Returns the QPointF form of this 2D vector.

See also toPoint() and toVector3D().

Returns the 3D form of this 2D vector, with the z coordinate set to zero.

See also toVector4D() and toPoint().

Returns the 4D form of this 2D vector, with the z and w coordinates set to zero.

See also toVector3D() and toPoint().

Returns the x coordinate of this point.

Returns the y coordinate of this point.

Returns the 2D vector as a QVariant.

Multiplies this vector's coordinates by the given *factor*, and returns a reference to this vector.

See also operator/=().

Multiplies the components of this vector by the corresponding components in *vector*.

Adds the given *vector* to this vector and returns a reference to this vector.

See also operator-=().

Subtracts the given *vector* from this vector and returns a reference to this vector.

See also operator+=().

Divides this vector's coordinates by the given *divisor*, and returns a reference to this vector.

See also operator*=().

Returns true if *v1* and *v2* are equal, allowing for a small fuzziness factor for floating-point comparisons; false otherwise.

Returns true if *v1* is not equal to *v2*; otherwise returns false. This operator uses an exact floating-point comparison.

Returns a copy of the given *vector*, multiplied by the given *factor*.

See also QVector2D::operator*=().

Returns a copy of the given *vector*, multiplied by the given *factor*.

See also QVector2D::operator*=().

Multiplies the components of *v1* by the corresponding components in *v2*.

Returns a QVector2D object that is the sum of the given vectors, *v1* and *v2*; each component is added separately.

See also QVector2D::operator+=().

Returns a QVector2D object that is formed by subtracting *v2* from *v1*; each component is subtracted separately.

See also QVector2D::operator-=().

This is an overloaded function.

Returns a QVector2D object that is formed by changing the sign of the components of the given *vector*.

Equivalent to `QVector2D(0,0) - vector`.

Returns the QVector2D object formed by dividing all three components of the given *vector* by the given *divisor*.

See also QVector2D::operator/=().

Writes the given *vector* to the given *stream* and returns a reference to the stream.

See also Format of the QDataStream Operators.

Returns true if *v1* is equal to *v2*; otherwise returns false. This operator uses an exact floating-point comparison.

Reads a 2D vector from the given *stream* into the given *vector* and returns a reference to the stream.

See also Format of the QDataStream Operators.

Copyright © 2010 Nokia Corporation and/or its subsidiary(-ies) | Trademarks | Qt 4.6.3 |