request to have Static function to find the neighboring points for each point in the given point cloud.

[xleEmesent]

Checklist

• I have searched for similar issues.
• For Python issues, I have tested with the latest development wheel.
• I have checked the release documentation and the latest documentation (for master branch).

Proposed new feature or change

In the latest version 1.4, we have a "Static function to compute the covariance matrix for each point in the given point cloud, doesn’t change the input". in pointcloud python class.
static estimate_point_covariances(input, search_param=KDTreeSearchParamKNN with knn = 30)
Can we also have another python api for "Static function to find the neighboring points for each point in the given point cloud, doesn’t change the input"? in open3d.geometry.KDTreeFlann class

static estimate_point_pcd_tree_search(input, search_param=KDTreeSearchParamKNN with knn = 30)
Currently in python, I loop each point in point cloud with function call such as following:

            [k,idx,_] = self.pcd_tree.search_radius_vector_3d(pcd.points[i], radius=radius)
            self.neighoursDic[i]=idx

Which is quite slow in python.

The reason for that is that some local features such as 1st order moments requires computation from neighbouring point per anchor point.

Many Thanks.

References

No response

Additional information

No response