CloudCompare forum

Hello:
I have a .las file, when I have loaded it, i just want get a range of point clouds to show it, for example: a point p(x,y,z) and a range 100, just like a box or sphere, how to get point clouds in the range quickly? can I use 'octree' to do faster get this points, if it is, how should I use it?
Thank you!

Use the 'Edit > scalar fields > Set point index as SF' (or something similar).

It will create a SF with the point index as values. Simply use 'Filter SF by value' to get the points in the right range (and spawn a label to see the index of any point).