pyvista.Transform.rotate_vector

Transform.rotate_vector(

vector: VectorLike[float],

angle: float,

*,

point: VectorLike[float] | None = None,

multiply_mode: Literal['pre', 'post'] | None = None,

) → Transform

Concatenate a rotation about a vector.

Create a matrix for rotation about the vector and concatenate() it with the current transformation matrix according to pre-multiply or post-multiply semantics.

Internally, the matrix is stored in the matrix_list.

Parameters:

vectorVectorLike[float]

Vector to rotate about.

anglefloat

Angle in degrees to rotate about the vector.

pointVectorLike[float], optional

Point to rotate about. By default, the object’s point is used, but this can be overridden. If set, two additional transformations are concatenated and added to the matrix_list:

• translate() to point before the rotation

• translate() away from point after the rotation

multiply_mode‘pre’ | ‘post’, optional

Multiplication mode to use when concatenating the matrix. By default, the object’s multiply_mode is used, but this can be overridden. Set this to 'pre' for pre-multiplication or 'post' for post-multiplication.

See also

pyvista.DataSet.rotate_vector

Rotate a mesh about a vector.

Examples

Concatenate a rotation of 30 degrees about the (1, 1, 1) axis.

>>> import pyvista as pv
>>> transform = pv.Transform().rotate_vector((1, 1, 1), 30)
>>> transform.matrix
array([[ 0.9106836 , -0.24401694,  0.33333333,  0.        ],
       [ 0.33333333,  0.9106836 , -0.24401694,  0.        ],
       [-0.24401694,  0.33333333,  0.9106836 ,  0.        ],
       [ 0.        ,  0.        ,  0.        ,  1.        ]])

Concatenate a second rotation of 45 degrees about the (1, 2, 3) axis.

>>> _ = transform.rotate_vector((1, 2, 3), 45)
>>> transform.matrix
array([[ 0.38042304, -0.50894634,  0.77217351,  0.        ],
       [ 0.83349512,  0.55045308, -0.04782562,  0.        ],
       [-0.40070461,  0.66179682,  0.63360933,  0.        ],
       [ 0.        ,  0.        ,  0.        ,  1.        ]])