forum.alglib.net

Hi

Can you run a 3D KNN with ALGLIB's KD-TREE?
/ is there an example

I saw many with real_2d_array
but did not see explicit support for real_3d_array
is 3D point not generally supported?

You don't need real_3d_array to work with 3D point cloud. It can be stored in 2D array as follows:

2D:


3D:

Hi Sergey,

I'm trying the same thing with my 3D cloud points in Delphi but could not figuring out how to make the KDTree work. Could you give me a concrete example of creating a KDTree from a 3D points cloud and search the neighbor points from a given X, Y, Z coordinate and a search radius R ?

Kind regards,
Vu