Direct zero-copy from cupy array about cupoch

[neka-nat]

Hi @Shipborn ,

Thank you for the feedback.
You can use dlpack to interact with data in cupy.

cloud = cupy.asarray(source_data)
dltensor = cloud.toDlpack()
gpu = cph.geometry.PointCloud()
gpu.from_points_dlpack(dltensor)

[neka-nat]

Hi @dHofmeister ,

Thank you for the report!
I've corrected the wording and pushed it to master.
Thanks.

[dHofmeister]

Thank you @neka-nat,

for reference for others:
To convert the pointcloud back to the host it currently tells you in the variable description "Use numpy.asarray() to copy to host."
Which is identical to the open3D description, implying:
host_array = np.asarray(gpu.points)

but the actual code is:
host_array = np.asarray(gpu.points.cpu())
This is not following the open3D API. not a critique, just a heads-up :)

just for future people to see.

Greetings
Deniz