The QVector4D class represents a vector or vertex in 4D space. More...
#include <QVector4D>
This class was introduced in Qt 4.6.
QVector4D () | |
QVector4D ( qreal xpos, qreal ypos, qreal zpos, qreal wpos ) | |
QVector4D ( const QPoint & point ) | |
QVector4D ( const QPointF & point ) | |
QVector4D ( const QVector2D & vector ) | |
QVector4D ( const QVector2D & vector, qreal zpos, qreal wpos ) | |
QVector4D ( const QVector3D & vector ) | |
QVector4D ( const QVector3D & vector, qreal wpos ) | |
bool | isNull () const |
qreal | length () const |
qreal | lengthSquared () const |
void | normalize () |
QVector4D | normalized () const |
void | setW ( qreal w ) |
void | setX ( qreal x ) |
void | setY ( qreal y ) |
void | setZ ( qreal z ) |
QPoint | toPoint () const |
QPointF | toPointF () const |
QVector2D | toVector2D () const |
QVector2D | toVector2DAffine () const |
QVector3D | toVector3D () const |
QVector3D | toVector3DAffine () const |
qreal | w () const |
qreal | x () const |
qreal | y () const |
qreal | z () const |
operator QVariant () const | |
QVector4D & | operator*= ( qreal factor ) |
QVector4D & | operator*= ( const QVector4D & vector ) |
QVector4D & | operator+= ( const QVector4D & vector ) |
QVector4D & | operator-= ( const QVector4D & vector ) |
QVector4D & | operator/= ( qreal divisor ) |
qreal | dotProduct ( const QVector4D & v1, const QVector4D & v2 ) |
bool | qFuzzyCompare ( const QVector4D & v1, const QVector4D & v2 ) |
bool | operator!= ( const QVector4D & v1, const QVector4D & v2 ) |
const QVector4D | operator* ( qreal factor, const QVector4D & vector ) |
const QVector4D | operator* ( const QVector4D & vector, qreal factor ) |
const QVector4D | operator* ( const QVector4D & v1, const QVector4D & v2 ) |
const QVector4D | operator+ ( const QVector4D & v1, const QVector4D & v2 ) |
const QVector4D | operator- ( const QVector4D & v1, const QVector4D & v2 ) |
const QVector4D | operator- ( const QVector4D & vector ) |
const QVector4D | operator/ ( const QVector4D & vector, qreal divisor ) |
QDataStream & | operator<< ( QDataStream & stream, const QVector4D & vector ) |
bool | operator== ( const QVector4D & v1, const QVector4D & v2 ) |
QDataStream & | operator>> ( QDataStream & stream, QVector4D & vector ) |
The QVector4D class represents a vector or vertex in 4D space.
The QVector4D class can also be used to represent vertices in 4D space. We therefore do not need to provide a separate vertex class.
Note: By design values in the QVector4D instance are stored as float. This means that on platforms where the qreal arguments to QVector4D functions are represented by double values, it is possible to lose precision.
See also QQuaternion, QVector2D, and QVector3D.
Constructs a null vector, i.e. with coordinates (0, 0, 0, 0).
Constructs a vector with coordinates (xpos, ypos, zpos, wpos).
Constructs a vector with x and y coordinates from a 2D point, and z and w coordinates of 0.
Constructs a vector with x and y coordinates from a 2D point, and z and w coordinates of 0.
Constructs a 4D vector from the specified 2D vector. The z and w coordinates are set to zero.
See also toVector2D().
Constructs a 4D vector from the specified 2D vector. The z and w coordinates are set to zpos and wpos respectively.
See also toVector2D().
Constructs a 4D vector from the specified 3D vector. The w coordinate is set to zero.
See also toVector3D().
Constructs a 4D vector from the specified 3D vector. The w coordinate is set to wpos.
See also toVector3D().
Returns the dot product of v1 and v2.
Returns true if the x, y, z, and w 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 w coordinate of this point to the given w coordinate.
See also w(), setX(), setY(), and setZ().
Sets the x coordinate of this point to the given x coordinate.
See also x(), setY(), setZ(), and setW().
Sets the y coordinate of this point to the given y coordinate.
See also y(), setX(), setZ(), and setW().
Sets the z coordinate of this point to the given z coordinate.
See also z(), setX(), setY(), and setW().
Returns the QPoint form of this 4D vector. The z and w coordinates are dropped.
See also toPointF() and toVector2D().
Returns the QPointF form of this 4D vector. The z and w coordinates are dropped.
See also toPoint() and toVector2D().
Returns the 2D vector form of this 4D vector, dropping the z and w coordinates.
See also toVector2DAffine(), toVector3D(), and toPoint().
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().
Returns the 3D vector form of this 4D vector, dropping the w coordinate.
See also toVector3DAffine(), toVector2D(), and toPoint().
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().
Returns the w coordinate of this point.
See also setW(), x(), y(), and z().
Returns the x coordinate of this point.
See also setX(), y(), z(), and w().
Returns the y coordinate of this point.
See also setY(), x(), z(), and w().
Returns the z coordinate of this point.
See also setZ(), x(), y(), and w().
Returns the 4D 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 QVector4D::operator*=().
Returns a copy of the given vector, multiplied by the given factor.
See also QVector4D::operator*=().
Returns the vector consisting of the multiplication of the components from v1 and v2.
See also QVector4D::operator*=().
Returns a QVector4D object that is the sum of the given vectors, v1 and v2; each component is added separately.
See also QVector4D::operator+=().
Returns a QVector4D object that is formed by subtracting v2 from v1; each component is subtracted separately.
See also QVector4D::operator-=().
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.
Returns the QVector4D object formed by dividing all four components of the given vector by the given divisor.
See also QVector4D::operator/=().
Writes the given vector to the given stream and returns a reference to the stream.
See also Serializing Qt Data Types.
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.
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