# QPointF¶

The QPointF class defines a point in the plane using floating point precision. More

## Detailed Description¶

A point is specified by a x coordinate and an y coordinate which can be accessed using the x() and y() functions. The coordinates of the point are specified using finite floating point numbers for accuracy. The isNull() function returns true if both x and y are set to 0.0. The coordinates can be set (or altered) using the setX() and setY() functions, or alternatively the rx() and ry() functions which return references to the coordinates (allowing direct manipulation).

Given a point p, the following statements are all equivalent:

p = QPointF()
p.setX(p.x() + 1.0)
p += QPointF(1.0, 0.0)
p.rx() = p.rx() + 1

A QPointF object can also be used as a vector: Addition and subtraction are defined as for vectors (each component is added separately). A QPointF object can also be divided or multiplied by an int or a qreal.

In addition, the QPointF class provides a constructor converting a QPoint object into a QPointF object, and a corresponding toPoint() function which returns a QPoint copy of this point. Finally, QPointF objects can be streamed as well as compared.

See also

QPoint QPolygonF

class PySide6.QtCore.QPointF

PySide6.QtCore.QPointF(p)

PySide6.QtCore.QPointF(QPointF)

PySide6.QtCore.QPointF(xpos, ypos)

Parameters

Constructs a null point, i.e. with coordinates (0.0, 0.0)

See also

isNull()

Constructs a copy of the given point.

See also

toPoint()

Constructs a point with the given coordinates (xpos, ypos).

See also

PySide6.QtCore.QPointF.__reduce__()
Return type

object

PySide6.QtCore.QPointF.__repr__()
Return type

object

static PySide6.QtCore.QPointF.dotProduct(p1, p2)
Parameters
Return type

float

p = QPointF( 3.1, 7.1)
q = QPointF(-1.0, 4.1)
lengthSquared = QPointF.dotProduct(p, q) # lengthSquared becomes 26.01()

Returns the dot product of p1 and p2.

PySide6.QtCore.QPointF.isNull()
Return type

bool

Returns true if both the x and y coordinates are set to 0.0 (ignoring the sign); otherwise returns false.

PySide6.QtCore.QPointF.manhattanLength()
Return type

float

Returns the sum of the absolute values of x() and y() , traditionally known as the “Manhattan length” of the vector from the origin to the point.

PySide6.QtCore.QPointF.__ne__(p2)
Parameters
Return type

bool

PySide6.QtCore.QPointF.__mul__(matrix)
Parameters

matrixPySide6.QtGui.QMatrix4x4

Return type

PySide6.QtCore.QPointF

Note

This function is deprecated.

PySide6.QtCore.QPointF.__mul__(matrix)
Parameters

matrixPySide6.QtGui.QMatrix4x4

Return type

PySide6.QtCore.QPointF

PySide6.QtCore.QPointF.__mul__(m)
Parameters
Return type

PySide6.QtCore.QPointF

PySide6.QtCore.QPointF.__mul__(c)
Parameters

c – float

Return type

PySide6.QtCore.QPointF

PySide6.QtCore.QPointF.__mul__(c)
Parameters

c – float

Return type

PySide6.QtCore.QPointF

PySide6.QtCore.QPointF.__imul__(c)
Parameters

c – float

Return type

PySide6.QtCore.QPointF

Multiplies this point’s coordinates by the given finite factor, and returns a reference to this point. For example:

p = QPointF(-1.1, 4.1)
= 2.5 # p becomes (-2.75, 10.25)

See also

operator/=()

PySide6.QtCore.QPointF.__add__(p2)
Parameters
Return type

PySide6.QtCore.QPointF

Returns point unmodified.

PySide6.QtCore.QPointF.__add__()
Return type

PySide6.QtCore.QPointF

PySide6.QtCore.QPointF.__iadd__(p)
Parameters
Return type

PySide6.QtCore.QPointF

Adds the given point to this point and returns a reference to this point. For example:

p = QPointF( 3.1, 7.1)
q = QPointF(-1.0, 4.1)
p += q # p becomes (2.1, 11.2)

See also

operator-=()

PySide6.QtCore.QPointF.__sub__()
Return type

PySide6.QtCore.QPointF

PySide6.QtCore.QPointF.__sub__(p2)
Parameters
Return type

PySide6.QtCore.QPointF

This is an overloaded function.

Returns a QPointF object that is formed by changing the sign of each component of the given point.

Equivalent to QPointF(0,0) - point.

PySide6.QtCore.QPointF.__isub__(p)
Parameters
Return type

PySide6.QtCore.QPointF

Subtracts the given point from this point and returns a reference to this point. For example:

p = QPointF( 3.1, 7.1)
q = QPointF(-1.0, 4.1)
p -= q # p becomes (4.1, 3.0)

See also

operator+=()

PySide6.QtCore.QPointF.__div__(divisor)
Parameters

divisor – float

Return type

PySide6.QtCore.QPointF

PySide6.QtCore.QPointF.__idiv__(c)
Parameters

c – float

Return type

PySide6.QtCore.QPointF

Divides both x and y by the given divisor, and returns a reference to this point. For example:

p = QPointF(-2.75, 10.25)
p /= 2.5 # p becomes (-1.1, 4.1)

The divisor must not be zero or NaN.

See also

operator*=()

PySide6.QtCore.QPointF.__eq__(p2)
Parameters
Return type

bool

PySide6.QtCore.QPointF.setX(x)
Parameters

x – float

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

See also

PySide6.QtCore.QPointF.setY(y)
Parameters

y – float

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

See also

PySide6.QtCore.QPointF.toPoint()
Return type

PySide6.QtCore.QPoint

Rounds the coordinates of this point to the nearest integer, and returns a QPoint object with the rounded coordinates.

See also

QPointF()

PySide6.QtCore.QPointF.toTuple()
Return type

object

PySide6.QtCore.QPointF.transposed()
Return type

PySide6.QtCore.QPointF

Returns a point with x and y coordinates exchanged:

QPointF{1.0, 2.0}.transposed() // {2.0, 1.0}

See also

PySide6.QtCore.QPointF.x()
Return type

float

Returns the x coordinate of this point.

See also

setX() rx()

PySide6.QtCore.QPointF.y()
Return type

float

Returns the y coordinate of this point.

See also

setY() ry()