PolyDataFilters.compute_arc_length

PolyDataFilters.compute_arc_length(*, progress_bar: bool = False) → PolyData

Compute the arc length over the length of the probed line.

It adds a new point-data array named "arc_length" with the computed arc length for each of the polylines in the input. For all other cell types, the arc length is set to 0.

Parameters:

progress_barbool, default: False

Display a progress bar to indicate progress.

Returns:

pyvista.PolyData

Mesh with the "arc_length" point data array.

Examples

Download Python source code | Download Jupyter notebook

>>> import pyvista as pv
>>> sphere = pv.Sphere()
>>> path = sphere.geodesic(0, 100)
>>> length = path.compute_arc_length()['arc_length'][-1]
>>> f'Length is {length:.3f}'
'Length is 0.812'

This is identical to the geodesic_distance.

>>> length = sphere.geodesic_distance(0, 100)
>>> f'Length is {length:.3f}'
'Length is 0.812'

You can also plot the arc_length.

>>> arc = path.compute_arc_length()
>>> arc.plot(scalars='arc_length')

Static Scene

Interactive Scene

Used In

Gallery Examples

Creating a Spline

Creating a Spline

1 use