pyvista.CubeFacesSource

class CubeFacesSource(

*,

center: VectorLike[float] = (0.0, 0.0, 0.0),

x_length: float = 1.0,

y_length: float = 1.0,

z_length: float = 1.0,

bounds: VectorLike[float] | None = None,

frame_width: float | None = None,

shrink_factor: float | None = None,

explode_factor: float | None = None,

names: Sequence[str] = ('+X', '-X', '+Y', '-Y', '+Z', '-Z'),

point_dtype: str = 'float32',

)

Generate the faces of a cube.

This source generates a MultiBlock with the six PolyData comprising the faces of a cube.

The faces may be shrunk or exploded to create equal-sized gaps or intersections between the faces. Additionally, the faces may be converted to frames with a constant-width border.

Added in version 0.45.0.

Parameters:

centerVectorLike[float], default: (0.0, 0.0, 0.0)

Center in [x, y, z].

x_lengthfloat, default: 1.0

Length of the cube in the x-direction.

y_lengthfloat, default: 1.0

Length of the cube in the y-direction.

z_lengthfloat, default: 1.0

Length of the cube in the z-direction.

boundssequence[float], optional

Specify the bounding box of the cube. If given, all other size arguments are ignored. (x_min, x_max, y_min, y_max, z_min, z_max).

frame_widthfloat, optional

Convert the faces into frames with the specified width. If set, the center portion of each face is removed and the output faces will each have four quad cells (one for each side of the frame) instead of a single quad cell. Values must be between 0.0 (minimal frame) and 1.0 (large frame). The frame is scaled to ensure it has a constant width.

shrink_factorfloat, optional

Shrink or grow the cube’s faces. If set, this is the factor by which to shrink or grow each face. The amount of shrinking or growth is relative to the smallest edge length of the cube, and all sides of the faces are shrunk by the same (constant) value.

Note

• A value of 1.0 has no effect.

• Values between 0.0 and 1.0 will shrink the faces.

• Values greater than 1.0 will grow the faces.

This has a similar effect to using shrink().

explode_factorfloat, optional

Push the faces away from (or pull them toward) the cube’s center. If set, this is the factor by which to move each face. The magnitude of the move is relative to the smallest edge length of the cube, and all faces are moved by the same (constant) amount.

Note

• A value of 0.0 has no effect.

• Increasing positive values will push the faces farther away (explode).

• Decreasing negative values will pull the faces closer together (implode).

This has a similar effect to using explode().

namessequence[str], default: (‘+X’,’-X’,’+Y’,’-Y’,’+Z’,’-Z’)

Name of each face in the generated MultiBlock.

point_dtypestr, default: ‘float32’

Set the desired output point types. It must be either ‘float32’ or ‘float64’.

Examples

Generate the default faces of a cube.

>>> import pyvista as pv
>>> from pyvista import examples
>>> cube_faces_source = pv.CubeFacesSource()
>>> output = cube_faces_source.output
>>> output.plot(show_edges=True, line_width=10)

Static Scene

Interactive Scene

The output is similar to that of CubeSource except it’s a MultiBlock.

>>> output
MultiBlock (...)
  N Blocks:   6
  X Bounds:   -5.000e-01, 5.000e-01
  Y Bounds:   -5.000e-01, 5.000e-01
  Z Bounds:   -5.000e-01, 5.000e-01

>>> cube_source = pv.CubeSource()
>>> cube_source.output
PolyData (...)
  N Cells:    6
  N Points:   24
  N Strips:   0
  X Bounds:   -5.000e-01, 5.000e-01
  Y Bounds:   -5.000e-01, 5.000e-01
  Z Bounds:   -5.000e-01, 5.000e-01
  N Arrays:   2

Use explode_factor to explode the faces.

>>> cube_faces_source.explode_factor = 0.5
>>> cube_faces_source.update()
>>> output.plot(show_edges=True, line_width=10)

Static Scene

Interactive Scene

Use shrink_factor to also shrink the faces.

>>> cube_faces_source.shrink_factor = 0.5
>>> cube_faces_source.update()
>>> output.plot(show_edges=True, line_width=10)

Static Scene

Interactive Scene

Fit cube faces to a dataset and only plot four of them.

>>> mesh = examples.load_airplane()
>>> cube_faces_source = pv.CubeFacesSource(bounds=mesh.bounds)
>>> output = cube_faces_source.output

>>> pl = pv.Plotter()
>>> _ = pl.add_mesh(mesh, color='tomato')
>>> _ = pl.add_mesh(output['+X'], opacity=0.5)
>>> _ = pl.add_mesh(output['-X'], opacity=0.5)
>>> _ = pl.add_mesh(output['+Y'], opacity=0.5)
>>> _ = pl.add_mesh(output['-Y'], opacity=0.5)
>>> pl.show()

Static Scene

Interactive Scene

Generate a frame instead of full faces.

>>> mesh = pv.ParametricEllipsoid(5, 4, 3)
>>> cube_faces_source = pv.CubeFacesSource(
...     bounds=mesh.bounds, frame_width=0.1
... )
>>> output = cube_faces_source.output

>>> pl = pv.Plotter()
>>> _ = pl.add_mesh(mesh, color='tomato')
>>> _ = pl.add_mesh(output, show_edges=True, line_width=10)
>>> pl.show()

Static Scene

Interactive Scene

Methods

CubeFacesSource.update()

Update the output of the source.

Attributes

CubeFacesSource.explode_factor	Push the faces away from (or pull them toward) the cube's center.
CubeFacesSource.frame_width	Convert the faces into frames with the specified border width.
CubeFacesSource.names	Return or set the names of the faces.
CubeFacesSource.output	Get the output of the source.
CubeFacesSource.shrink_factor	Shrink or grow the cube's faces.