Selecting points multiple times in one go

[venugovh]

Hi,

I am using the enable_point_picking() method to select points on a mesh. However, I need to select single points at multiple locations in one go instead of having to plot and select different points every time. I cannot use the enable_cell_picking() method because the point locations are scattered. A dragging window would include unnecessary points.

Is there a way to tailor this method or is there another solution so that once I plot the mesh with the points, I can select multiple points and return them as a NumPy array?

Thank you! This library is a lifesaver :)

[banesullivan]

Totally possible. use the callback argument of enable_point_picking() to track your picked points. Something like:

import pyvista as pv
from pyvista import examples

mesh = examples.download_bunny()

da_points = []
p = pv.Plotter(notebook=0)
p.add_mesh(mesh)

def callback(pt):
    da_points.append(pt)
    p.add_point_labels([pt,], ['You picked me!'], )

p.enable_point_picking(callback)
p.show()

Screen.Recording.2021-11-28.at.1.58.55.PM.mov

[venugovh]

Would the same functions work for pyvistaqt.BackgroundPlotter()?

Thank you!

[banesullivan]

it should!