warp_by_scalar#

UniformGrid.warp_by_scalar(scalars=None, factor=1.0, normal=None, inplace=False, progress_bar=False, **kwargs)#

Warp the dataset’s points by a point data scalars array’s values.

This modifies point coordinates by moving points along point normals by the scalar amount times the scale factor.

Parameters
scalarsstr, optional

Name of scalars to warp by. Defaults to currently active scalars.

factorfloat, optional

A scaling factor to increase the scaling effect. Alias scale_factor also accepted - if present, overrides factor.

normalsequence, optional

User specified normal. If given, data normals will be ignored and the given normal will be used to project the warp.

inplacebool, optional

If True, the points of the given dataset will be updated.

progress_barbool, optional

Display a progress bar to indicate progress.

**kwargsdict, optional

Accepts scale_factor instead of factor.

Returns
pyvista.DataSet

Warped Dataset. Return type matches input.

Examples

First, plot the unwarped mesh.

>>> from pyvista import examples
>>> mesh = examples.download_st_helens()
>>> mesh.plot(cmap='gist_earth', show_scalar_bar=False)
../../../_images/pyvista-UniformGrid-warp_by_scalar-1_00_00.png

Now, warp the mesh by the 'Elevation' scalars.

>>> warped = mesh.warp_by_scalar('Elevation')
>>> warped.plot(cmap='gist_earth', show_scalar_bar=False)
../../../_images/pyvista-UniformGrid-warp_by_scalar-1_01_00.png

See Computing Surface Normals for more examples using this filter.