Rectangular selection functionality

[jkissi]

Hello Marco!!
I would like to create an option to select a subset of points from my point cloud and show the properties of those points only. I know that there are click and mouse move callback functions from a previous answer you gave. Simply put, what I am after is a "click and drag" selection box, where you click and hold the button and the viewer starts drawing a box, and you release the mouse button and it finishes drawing the box. Then I can know all of the coordinates of the points within the boundary of the box. I've included an image from another program, just in case I am not explaining it very well...

Are there any examples that do something like this that I could have a look at? If not, if you can think of any suggestions, I would, as always, be very grateful

Cheers
j

[marcomusy]

Hi in fact this has been on my my todo list for a while... but I always resisted... :)
It would not be so difficult to implement in vedo as VTK has this functionality already.

Maybe thisis something you'd like to play around if it fits your needs:
(right-click start and stop drawing, the press z or Z to cut)

import numpy as np
from vedo import *
from vedo.applications import FreeHandCutPlotter

pts = np.random.randn(10000, 3)
pts = Points(pts).ps(8)
pts.name = "My Gaussian"

cube = Cube().x(2)

plt = FreeHandCutPlotter(pts)
plt.addHoverLegend()
plt.show(pts, Axes(pts), cube) # cube is ignored by the cutter
plt.close()

Check out:
examples/basic/cutFreeHand.py

..maybe you can customize that one with a box instead of a line.

[jkissi]

Ok thanks for the answer. I need a little time to fiddle with this, so I'll get back to you when I have more questions. Thanks again!!