pyvista.Light.world_focal_point

pyvista.Light.world_focal_point#

property Light.world_focal_point[ソース]#

ライトのワールド空間焦点を返します．

ワールド空間の焦点は，存在する場合，ライトの変換行列によって変換される focal_point プロパティです．この読み取り専用プロパティの値は， vtk.vtkLight.GetTransformedFocalPoint() メソッドに対応します．

例

Create a light with a transformation matrix that corresponds to a 90-degree rotation around the z-axis and a shift by (0, 0, -1), and check that the light's focal point transforms as expected.

>>> import numpy as np
>>> import pyvista as pv
>>> light = pv.Light(focal_point=(1, 0, 3))
>>> trans = np.zeros((4, 4))
>>> trans[:-1, :-1] = [[0, -1, 0], [1, 0, 0], [0, 0, 1]]
>>> trans[:-1, -1] = [0, 0, -1]
>>> light.transform_matrix = trans
>>> light.focal_point
(1.0, 0.0, 3.0)
>>> light.world_focal_point
(0.0, 1.0, 2.0)
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