Member Function Documentation
QVector4D::QVector4D()
Constructs a null vector, i.e. with coordinates (0, 0, 0, 0).
QVector4D::QVector4D(qreal xpos, qreal ypos, qreal zpos, qreal wpos)
Constructs a vector with coordinates (xpos, ypos, zpos, wpos).
QVector4D::QVector4D(const QPoint & point)
Constructs a vector with x and y coordinates from a 2D point, and z and w coordinates of 0.
QVector4D::QVector4D(const QPointF & point)
Constructs a vector with x and y coordinates from a 2D point, and z and w coordinates of 0.
QVector4D::QVector4D(const QVector2D & vector)
Constructs a 4D vector from the specified 2D vector. The z and w coordinates are set to zero.
See also toVector2D().
QVector4D::QVector4D(const QVector2D & vector, qreal zpos, qreal wpos)
Constructs a 4D vector from the specified 2D vector. The z and w coordinates are set to zpos and wpos respectively.
See also toVector2D().
QVector4D::QVector4D(const QVector3D & vector)
Constructs a 4D vector from the specified 3D vector. The w coordinate is set to zero.
See also toVector3D().
QVector4D::QVector4D(const QVector3D & vector, qreal wpos)
Constructs a 4D vector from the specified 3D vector. The w coordinate is set to wpos.
See also toVector3D().
qreal QVector4D::dotProduct(const QVector4D & v1, const QVector4D & v2) [static]
Returns the dot product of v1 and v2.
bool QVector4D::isNull() const
Returns true if the x, y, z, and w coordinates are set to 0.0, otherwise returns false.
qreal QVector4D::length() const
Returns the length of the vector from the origin.
See also lengthSquared() and normalized().
qreal QVector4D::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 QVector4D::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().
QVector4D QVector4D::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 QVector4D::setW(qreal w)
Sets the w coordinate of this point to the given w coordinate.
See also w(), setX(), setY(), and setZ().
void QVector4D::setX(qreal x)
Sets the x coordinate of this point to the given x coordinate.
See also x(), setY(), setZ(), and setW().
void QVector4D::setY(qreal y)
Sets the y coordinate of this point to the given y coordinate.
See also y(), setX(), setZ(), and setW().
void QVector4D::setZ(qreal z)
Sets the z coordinate of this point to the given z coordinate.
See also z(), setX(), setY(), and setW().
QPoint QVector4D::toPoint() const
Returns the QPoint form of this 4D vector. The z and w coordinates are dropped.
See also toPointF() and toVector2D().
QPointF QVector4D::toPointF() const
Returns the QPointF form of this 4D vector. The z and w coordinates are dropped.
See also toPoint() and toVector2D().
QVector2D QVector4D::toVector2D() const
Returns the 2D vector form of this 4D vector, dropping the z and w coordinates.
See also toVector2DAffine(), toVector3D(), and toPoint().
QVector2D QVector4D::toVector2DAffine() const
Returns the 2D vector form of this 4D vector, dividing the x and y coordinates by the w coordinate and dropping the z coordinate. Returns a null vector if w is zero.
See also toVector2D(), toVector3DAffine(), and toPoint().
QVector3D QVector4D::toVector3D() const
Returns the 3D vector form of this 4D vector, dropping the w coordinate.
See also toVector3DAffine(), toVector2D(), and toPoint().
QVector3D QVector4D::toVector3DAffine() const
Returns the 3D vector form of this 4D vector, dividing the x, y, and z coordinates by the w coordinate. Returns a null vector if w is zero.
See also toVector3D(), toVector2DAffine(), and toPoint().
qreal QVector4D::w() const
Returns the w coordinate of this point.
See also setW(), x(), y(), and z().
qreal QVector4D::x() const
Returns the x coordinate of this point.
See also setX(), y(), z(), and w().
qreal QVector4D::y() const
Returns the y coordinate of this point.
See also setY(), x(), z(), and w().
qreal QVector4D::z() const
Returns the z coordinate of this point.
See also setZ(), x(), y(), and w().
QVector4D::operator QVariant() const
Returns the 4D vector as a QVariant.
QVector4D & QVector4D::operator*=(qreal factor)
Multiplies this vector's coordinates by the given factor, and returns a reference to this vector.
See also operator/=().
QVector4D & QVector4D::operator*=(const QVector4D & vector)
Multiplies the components of this vector by the corresponding components in vector.
QVector4D & QVector4D::operator+=(const QVector4D & vector)
Adds the given vector to this vector and returns a reference to this vector.
See also operator-=().
QVector4D & QVector4D::operator-=(const QVector4D & vector)
Subtracts the given vector from this vector and returns a reference to this vector.
See also operator+=().
QVector4D & QVector4D::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 QVector4D & v1, const QVector4D & v2)
Returns true if v1 and v2 are equal, allowing for a small fuzziness factor for floating-point comparisons; false otherwise.
bool operator!=(const QVector4D & v1, const QVector4D & v2)
Returns true if v1 is not equal to v2; otherwise returns false. This operator uses an exact floating-point comparison.
const QVector4D operator*(qreal factor, const QVector4D & vector)
Returns a copy of the given vector, multiplied by the given factor.
See also QVector4D::operator*=().
const QVector4D operator*(const QVector4D & vector, qreal factor)
Returns a copy of the given vector, multiplied by the given factor.
See also QVector4D::operator*=().
const QVector4D operator*(const QVector4D & v1, const QVector4D & v2)
Returns the vector consisting of the multiplication of the components from v1 and v2.
See also QVector4D::operator*=().
const QVector4D operator+(const QVector4D & v1, const QVector4D & v2)
Returns a QVector4D object that is the sum of the given vectors, v1 and v2; each component is added separately.
See also QVector4D::operator+=().
const QVector4D operator-(const QVector4D & v1, const QVector4D & v2)
Returns a QVector4D object that is formed by subtracting v2 from v1; each component is subtracted separately.
See also QVector4D::operator-=().
const QVector4D operator-(const QVector4D & vector)
This is an overloaded function.
Returns a QVector4D object that is formed by changing the sign of all three components of the given vector.
Equivalent to QVector4D(0,0,0,0) - vector.
const QVector4D operator/(const QVector4D & vector, qreal divisor)
Returns the QVector4D object formed by dividing all four components of the given vector by the given divisor.
See also QVector4D::operator/=().
QDataStream & operator<<(QDataStream & stream, const QVector4D & 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 QVector4D & v1, const QVector4D & v2)
Returns true if v1 is equal to v2; otherwise returns false. This operator uses an exact floating-point comparison.
Reads a 4D vector from the given stream into the given vector and returns a reference to the stream.
See also Serializing Qt Data Types.
