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QVector2D¶
The QVector2D class represents a vector or vertex in 2D space. More…
New in version 4.6.
Synopsis¶
Functions¶
def
__add__(v2)def
__div__(divisor)def
__div__(divisor)def
__eq__(v2)def
__iadd__(vector)def
__idiv__(divisor)def
__idiv__(vector)def
__imul__(factor)def
__imul__(vector)def
__isub__(vector)def
__mul__(factor)def
__mul__(factor)def
__mul__(v2)def
__ne__(v2)def
__reduce__()def
__repr__()def
__sub__()def
__sub__(v2)def
distanceToLine(point, direction)def
distanceToPoint(point)def
isNull()def
length()def
lengthSquared()def
normalize()def
normalized()def
operator[](i)def
setX(x)def
setY(y)def
toPoint()def
toPointF()def
toTuple()def
toVector3D()def
toVector4D()def
x()def
y()
Static functions¶
def
dotProduct(v1, v2)
Detailed Description¶
Vectors are one of the main building blocks of 2D representation and drawing. They consist of two finite floating-point coordinates, traditionally called x and y.
The QVector2D class can also be used to represent vertices in 2D space. We therefore do not need to provide a separate vertex class.
See also
- class PySide6.QtGui.QVector2D¶
PySide6.QtGui.QVector2D(point)
PySide6.QtGui.QVector2D(point)
PySide6.QtGui.QVector2D(vector)
PySide6.QtGui.QVector2D(vector)
PySide6.QtGui.QVector2D(xpos, ypos)
- Parameters
point –
PySide6.QtCore.QPointxpos – float
vector –
PySide6.QtGui.QVector3Dypos – float
Constructs a null vector, i.e. with coordinates (0, 0).
Constructs a vector with x and y coordinates from a 2D point.
Constructs a vector with x and y coordinates from a 2D point.
Constructs a vector with x and y coordinates from a 3D vector. The z coordinate of vector is dropped.
See also
Constructs a vector with x and y coordinates from a 3D vector. The z and w coordinates of vector are dropped.
See also
Constructs a vector with coordinates (xpos, ypos). Both coordinates must be finite.
- PySide6.QtGui.QVector2D.__reduce__()¶
- Return type
object
- PySide6.QtGui.QVector2D.__repr__()¶
- Return type
object
- PySide6.QtGui.QVector2D.distanceToLine(point, direction)¶
- Parameters
point –
PySide6.QtGui.QVector2Ddirection –
PySide6.QtGui.QVector2D
- Return type
float
Returns the distance that this vertex is from a line defined by point and the unit vector direction.
If direction is a null vector, then it does not define a line. In that case, the distance from point to this vertex is returned.
See also
- PySide6.QtGui.QVector2D.distanceToPoint(point)¶
- Parameters
point –
PySide6.QtGui.QVector2D- Return type
float
Returns the distance from this vertex to a point defined by the vertex point.
See also
- static PySide6.QtGui.QVector2D.dotProduct(v1, v2)¶
- Parameters
- Return type
float
Returns the dot product of v1 and v2.
- PySide6.QtGui.QVector2D.isNull()¶
- Return type
bool
Returns true if the x and y coordinates are set to 0.0, otherwise returns false.
- PySide6.QtGui.QVector2D.length()¶
- Return type
float
Returns the length of the vector from the origin.
See also
- PySide6.QtGui.QVector2D.lengthSquared()¶
- Return type
float
Returns the squared length of the vector from the origin. This is equivalent to the dot product of the vector with itself.
See also
- PySide6.QtGui.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
- PySide6.QtGui.QVector2D.normalized()¶
- Return type
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
- PySide6.QtGui.QVector2D.__ne__(v2)¶
- Parameters
- Return type
bool
- PySide6.QtGui.QVector2D.__mul__(v2)¶
- Parameters
- Return type
- PySide6.QtGui.QVector2D.__mul__(factor)
- Parameters
factor – float
- Return type
- PySide6.QtGui.QVector2D.__mul__(factor)
- Parameters
factor – float
- Return type
- PySide6.QtGui.QVector2D.__imul__(factor)¶
- Parameters
factor – float
- Return type
Multiplies this vector’s coordinates by the given finite factor and returns a reference to this vector.
See also
operator/=()operator*()
- PySide6.QtGui.QVector2D.__imul__(vector)
- Parameters
vector –
PySide6.QtGui.QVector2D- Return type
Multiplies each component of this vector by the corresponding component of vector and returns a reference to this vector.
Note
This is not a cross product of this vector with vector. (Its components add up to the dot product of this vector and vector.)
See also
operator/=() operator*()
- PySide6.QtGui.QVector2D.__add__(v2)¶
- Parameters
- Return type
- PySide6.QtGui.QVector2D.__iadd__(vector)¶
- Parameters
vector –
PySide6.QtGui.QVector2D- Return type
Adds the given vector to this vector and returns a reference to this vector.
See also
operator-=()
- PySide6.QtGui.QVector2D.__sub__()¶
- Return type
- PySide6.QtGui.QVector2D.__sub__(v2)
- Parameters
- Return type
This is an overloaded function.
Returns a QVector2D object that is formed by changing the sign of each component of the given vector.
Equivalent to QVector2D(0,0) - vector.
- PySide6.QtGui.QVector2D.__isub__(vector)¶
- Parameters
vector –
PySide6.QtGui.QVector2D- Return type
Subtracts the given vector from this vector and returns a reference to this vector.
See also
operator+=()
- PySide6.QtGui.QVector2D.__div__(divisor)¶
- Parameters
divisor –
PySide6.QtGui.QVector2D- Return type
- PySide6.QtGui.QVector2D.__div__(divisor)
- Parameters
divisor – float
- Return type
- PySide6.QtGui.QVector2D.__idiv__(vector)¶
- Parameters
vector –
PySide6.QtGui.QVector2D- Return type
Divides each component of this vector by the corresponding component of vector and returns a reference to this vector.
The vector must have no component that is either zero or NaN.
See also
operator*=()operator/()
- PySide6.QtGui.QVector2D.__idiv__(divisor)
- Parameters
divisor – float
- Return type
Divides this vector’s coordinates by the given divisor and returns a reference to this vector. The divisor must not be either zero or NaN.
See also
operator*=()
- PySide6.QtGui.QVector2D.__eq__(v2)¶
- Parameters
- Return type
bool
- PySide6.QtGui.QVector2D.operator[](i)
- Parameters
i – int
- Return type
float
Returns the component of the vector at index position i.
i must be a valid index position in the vector (i.e., 0 <= i < 2).
- PySide6.QtGui.QVector2D.setX(x)¶
- Parameters
x – float
Sets the x coordinate of this point to the given finite x coordinate.
- PySide6.QtGui.QVector2D.setY(y)¶
- Parameters
y – float
Sets the y coordinate of this point to the given finite y coordinate.
- PySide6.QtGui.QVector2D.toPoint()¶
- Return type
Returns the QPoint form of this 2D vector. Each coordinate is rounded to the nearest integer.
See also
- PySide6.QtGui.QVector2D.toPointF()¶
- Return type
Returns the QPointF form of this 2D vector.
See also
- PySide6.QtGui.QVector2D.toTuple()¶
- Return type
object
- PySide6.QtGui.QVector2D.toVector3D()¶
- Return type
Returns the 3D form of this 2D vector, with the z coordinate set to zero.
See also
- PySide6.QtGui.QVector2D.toVector4D()¶
- Return type
Returns the 4D form of this 2D vector, with the z and w coordinates set to zero.
See also
- PySide6.QtGui.QVector2D.x()¶
- Return type
float
Returns the x coordinate of this point.
- PySide6.QtGui.QVector2D.y()¶
- Return type
float
Returns the y coordinate of this point.
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