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The QVector4D class represents a vector or vertex in 4D space. More...
This class can be pickled.
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.
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().
| PyQt 4.12.1 for X11 | Copyright © Riverbank Computing Ltd and The Qt Company 2015 | Qt 4.8.7 |