Member Function Documentation
QVector2D::QVector2D()
Constructs a null vector, i.e. with coordinates (0, 0, 0).
QVector2D::QVector2D(qreal xpos, qreal ypos)
Constructs a vector with coordinates (xpos, ypos).
QVector2D::QVector2D(const QPoint & point)
Constructs a vector with x and y coordinates from a 2D point.
QVector2D::QVector2D(const QPointF & point)
Constructs a vector with x and y coordinates from a 2D point.
QVector2D::QVector2D(const QVector3D & vector)
Constructs a vector with x and y coordinates from a 3D vector. The z coordinate of vector is dropped.
See also toVector3D().
QVector2D::QVector2D(const QVector4D & vector)
Constructs a vector with x and y coordinates from a 3D vector. The z and w coordinates of vector are dropped.
See also toVector4D().
qreal QVector2D::dotProduct(const QVector2D & v1, const QVector2D & v2) [static]
Returns the dot product of v1 and v2.
bool QVector2D::isNull() const
Returns true if the x and y coordinates are set to 0.0, otherwise returns false.
qreal QVector2D::length() const
Returns the length of the vector from the origin.
See also lengthSquared() and normalized().
qreal QVector2D::lengthSquared() const
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().
void QVector2D::normalize()
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().
QVector2D QVector2D::normalized() const
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().
void QVector2D::setX(qreal x)
Sets the x coordinate of this point to the given x coordinate.
See also x() and setY().
void QVector2D::setY(qreal y)
Sets the y coordinate of this point to the given y coordinate.
See also y() and setX().
QPoint QVector2D::toPoint() const
Returns the QPoint form of this 2D vector.
See also toPointF() and toVector3D().
QPointF QVector2D::toPointF() const
Returns the QPointF form of this 2D vector.
See also toPoint() and toVector3D().
QVector3D QVector2D::toVector3D() const
Returns the 3D form of this 2D vector, with the z coordinate set to zero.
See also toVector4D() and toPoint().
QVector4D QVector2D::toVector4D() const
Returns the 4D form of this 2D vector, with the z and w coordinates set to zero.
See also toVector3D() and toPoint().
qreal QVector2D::x() const
Returns the x coordinate of this point.
See also setX() and y().
qreal QVector2D::y() const
Returns the y coordinate of this point.
See also setY() and x().
QVector2D::operator QVariant() const
Returns the 2D vector as a QVariant.
QVector2D & QVector2D::operator*=(qreal factor)
Multiplies this vector's coordinates by the given factor, and returns a reference to this vector.
See also operator/=().
QVector2D & QVector2D::operator*=(const QVector2D & vector)
Multiplies the components of this vector by the corresponding components in vector.
QVector2D & QVector2D::operator+=(const QVector2D & vector)
Adds the given vector to this vector and returns a reference to this vector.
See also operator-=().
QVector2D & QVector2D::operator-=(const QVector2D & vector)
Subtracts the given vector from this vector and returns a reference to this vector.
See also operator+=().
QVector2D & QVector2D::operator/=(qreal divisor)
Divides this vector's coordinates by the given divisor, and returns a reference to this vector.
See also operator*=().
Related Non-Members
bool qFuzzyCompare(const QVector2D & v1, const QVector2D & v2)
Returns true if v1 and v2 are equal, allowing for a small fuzziness factor for floating-point comparisons; false otherwise.
bool operator!=(const QVector2D & v1, const QVector2D & v2)
Returns true if v1 is not equal to v2; otherwise returns false. This operator uses an exact floating-point comparison.
const QVector2D operator*(qreal factor, const QVector2D & vector)
Returns a copy of the given vector, multiplied by the given factor.
See also QVector2D::operator*=().
const QVector2D operator*(const QVector2D & vector, qreal factor)
Returns a copy of the given vector, multiplied by the given factor.
See also QVector2D::operator*=().
const QVector2D operator*(const QVector2D & v1, const QVector2D & v2)
Multiplies the components of v1 by the corresponding components in v2.
const QVector2D operator+(const QVector2D & v1, const QVector2D & 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+=().
const QVector2D operator-(const QVector2D & v1, const QVector2D & v2)
Returns a QVector2D object that is formed by subtracting v2 from v1; each component is subtracted separately.
See also QVector2D::operator-=().
const QVector2D operator-(const QVector2D & vector)
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.
const QVector2D operator/(const QVector2D & vector, qreal divisor)
Returns the QVector2D object formed by dividing all three components of the given vector by the given divisor.
See also QVector2D::operator/=().
QDataStream & operator<<(QDataStream & stream, const QVector2D & vector)
Writes the given vector to the given stream and returns a reference to the stream.
See also Serializing Qt Data Types.
bool operator==(const QVector2D & v1, const QVector2D & v2)
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 Serializing Qt Data Types.
