QMatrix4x4露

PyQt5.QtGui.QMatrix4x4

Description露

The QMatrix4x4 class represents a 4x4 transformation matrix in 3D space.

The QMatrix4x4 class in general is treated as a row-major matrix, in that the constructors and operator() functions take data in row-major format, as is familiar in C-style usage.

Internally the data is stored as column-major format, so as to be optimal for passing to OpenGL functions, which expect column-major data.

When using these functions be aware that they return data in column-major format:

See also

QVector3D, QGenericMatrix.

Methods露

__init__()

TODO

__init__(Sequence[float])

TODO

__init__(QTransform)

Constructs a 4x4 matrix from the conventional Qt 2D transformation matrix transform.

If transform has a special type (identity, translate, scale, etc), the programmer should follow this constructor with a call to optimize() if they wish QMatrix4x4 to optimize further calls to translate(), scale(), etc.

See also

toTransform(), optimize().

__init__(QMatrix4x4)

TODO

__init__(float, float, float, float, float, float, float, float, float, float, float, float, float, float, float, float)

TODO

__add__(QMatrix4x4) → QMatrix4x4

TODO

column(int) → QVector4D

See also

setColumn().

copyDataTo() → List[float]

TODO

data() → List[float]

TODO

determinant() → float

Returns the determinant of this matrix.

__eq__(QMatrix4x4) → bool

TODO

fill(float)

TODO

frustum(float, float, float, float, float, float)

TODO

__getitem__(object) → object

TODO

__iadd__(QMatrix4x4) → QMatrix4x4

TODO

__imatmul__(QMatrix4x4) → QMatrix4x4

TODO

__imul__(QMatrix4x4) → QMatrix4x4

TODO

__imul__(float) → QMatrix4x4

TODO

inverted() → (QMatrix4x4, bool)

Returns the inverse of this matrix. Returns the identity if this matrix cannot be inverted; i.e. determinant() is zero. If invertible is not null, then true will be written to that location if the matrix can be inverted; false otherwise.

If the matrix is recognized as the identity or an orthonormal matrix, then this function will quickly invert the matrix using optimized routines.

See also

determinant(), normalMatrix().

isAffine() → bool

TODO

isIdentity() → bool

TODO

__isub__(QMatrix4x4) → QMatrix4x4

TODO

__itruediv__(float) → QMatrix4x4

TODO

lookAt(QVector3D, QVector3D, QVector3D)

Multiplies this matrix by a viewing matrix derived from an eye point. The center value indicates the center of the view that the eye is looking at. The up value indicates which direction should be considered up with respect to the eye.

Note: The up vector must not be parallel to the line of sight from eye to center.

map(QPoint) → QPoint

TODO

map(Union[QPointF, QPoint]) → QPointF

TODO

map(QVector3D) → QVector3D

TODO

map(QVector4D) → QVector4D

TODO

mapRect(QRect) → QRect

Maps rect by multiplying this matrix by the corners of rect and then forming a new rectangle from the results. The returned rectangle will be an ordinary 2D rectangle with sides parallel to the horizontal and vertical axes.

See also

map().

mapRect(QRectF) → QRectF

Maps rect by multiplying this matrix by the corners of rect and then forming a new rectangle from the results. The returned rectangle will be an ordinary 2D rectangle with sides parallel to the horizontal and vertical axes.

See also

map().

mapVector(QVector3D) → QVector3D

TODO

__matmul__(QMatrix4x4) → QMatrix4x4

TODO

__mul__(QMatrix4x4) → QMatrix4x4

TODO

__mul__(QVector3D) → QVector3D

TODO

__mul__(QVector4D) → QVector4D

TODO

__mul__(QPoint) → QPoint

TODO

__mul__(Union[QPointF, QPoint]) → QPointF

TODO

__mul__(float) → QMatrix4x4

TODO

__ne__(QMatrix4x4) → bool

TODO

__neg__() → QMatrix4x4

TODO

normalMatrix() → QMatrix3x3

Returns the normal matrix corresponding to this 4x4 transformation. The normal matrix is the transpose of the inverse of the top-left 3x3 part of this 4x4 matrix. If the 3x3 sub-matrix is not invertible, this function returns the identity.

See also

inverted().

optimize()

Optimize the usage of this matrix from its current elements.

Some operations such as translate(), scale(), and rotate() can be performed more efficiently if the matrix being modified is already known to be the identity, a previous translate(), a previous scale(), etc.

Normally the QMatrix4x4 class keeps track of this special type internally as operations are performed. However, if the matrix is modified directly with {QLoggingCategory::operator()}{operator()()} or data(), then QMatrix4x4 will lose track of the special type and will revert to the safest but least efficient operations thereafter.

By calling after directly modifying the matrix, the programmer can force QMatrix4x4 to recover the special type if the elements appear to conform to one of the known optimized types.

See also

operator()(), data(), translate().

ortho(QRect)

This is an overloaded function.

Multiplies this matrix by another that applies an orthographic projection for a window with boundaries specified by rect. The near and far clipping planes will be -1 and 1 respectively.

See also

frustum(), perspective().

ortho(QRectF)

This is an overloaded function.

Multiplies this matrix by another that applies an orthographic projection for a window with boundaries specified by rect. The near and far clipping planes will be -1 and 1 respectively.

See also

frustum(), perspective().

ortho(float, float, float, float, float, float)

TODO

perspective(float, float, float, float)

TODO

__repr__() → str

TODO

__rmul__(float) → QMatrix4x4

TODO

rotate(QQuaternion)

Multiples this matrix by another that rotates coordinates according to a specified quaternion. The quaternion is assumed to have been normalized.

See also

scale(), translate(), QQuaternion.

rotate(float, QVector3D)

TODO

rotate(float, float, float, z: float = 0)

TODO

row(int) → QVector4D

See also

setRow().

scale(QVector3D)

Multiplies this matrix by another that scales coordinates by the components of vector.

See also

translate(), rotate().

scale(float)

TODO

scale(float, float)

TODO

scale(float, float, float)

TODO

setColumn(int, QVector4D)

See also

column().

__setitem__(object, float)

TODO

setRow(int, QVector4D)

See also

row().

setToIdentity()

TODO

__sub__(QMatrix4x4) → QMatrix4x4

TODO

toTransform() → QTransform

Returns the conventional Qt 2D transformation matrix that corresponds to this matrix.

The returned QTransform is formed by simply dropping the third row and third column of the QMatrix4x4. This is suitable for implementing orthographic projections where the z co-ordinate should be dropped rather than projected.

See also

toAffine().

toTransform(float) → QTransform

TODO

translate(QVector3D)

Multiplies this matrix by another that translates coordinates by the components of vector.

See also

scale(), rotate().

translate(float, float)

TODO

translate(float, float, float)

TODO

transposed() → QMatrix4x4

Returns this matrix, transposed about its diagonal.

__truediv__(float) → QMatrix4x4

TODO

viewport(QRectF)

TODO

viewport(float, float, float, float, nearPlane: float = 0, farPlane: float = 1)

TODO