This is not part of the public interface. The preferred methods of obtaining PlyElement instances are PlyData.read (to read from

Read data from a binary stream. Raise StopIteration if the property could not be read.

Return generator over the (numerical) PLY representation of the list data (length followed by actual data).

Write data to a binary stream.

Write data to a binary stream.

input: grad_out: (n, c) output: grad_input: (n, c), grad_position: (n, nsample, c), grad_weight : (n, nsample, c')

input: grad_out: (m, c, nsample) output: (n, c), None

input: grad_out: (n, nsample, c) output: grad_input1: (n, c), grad_input2: (n, c)

input: coords: (m, 3), new_xyz: (n, 3), input: (m, c), offset: (b), new_offset: (b) output: (n, c)

input: grad_output: (n, g, c) output: grad_weight: (m, g), grad_value: (n, g, c), none, none

Construct a PlyElement from an array's metadata. len_types and val_types can be given as mappings from list property names t

List properties always have a numpy dtype of "object".

FNV64-1A

input: input: (n, c), position: (n, nsample, c), weight : (n, nsample, c'), idx: (n, nsample) output: (n, c)

input: input: (n, c), idx : (m, nsample) output: (m, nsample, c)

input: input1: (n, c), input2: (n, c), idx: (n, nsample) output: (n, nsample, c)

input: coords: (m, 3), new_xyz: (n, 3), input: (m, c), offset: (b), new_offset: (b) output: (n, c)

input - query: (n, g, c), key: (n, g, c), weight: (c) 1_c for scatter attention, index_target: (m), index_refer: (m)

input - weight: (m, g), value: (n, g, c) index_target: (m), index_value: (m) output - output: (n, g, c)

input: coords: (n, 3), offset: (b), new_offset: (b) output: idx: (m)

input: coords: (n, 3), new_xyz: (m, 3), offset: (b), new_offset: (b) output: idx: (m, nsample) -1 is placeholder, dist2: (m, nsample)

input: coords: (n, 3), new_xyz: (m, 3), offset: (b), new_offset: (b) output: idx: (m, nsample), dist2: (m, nsample)

input: coords: (n, 3), new_xyz: (m, 3), offset: (b), new_offset: (b) output: idx: (m, nsample), dist2: (m, nsample)

Provide PLY-formatted metadata for the instance.

Format this element's metadata as it would appear in a PLY header.

input: coords: (m, 3), new_xyz: (n, 3), color: (m, c), offset: (b), new_offset: (b) output: (n, c)

Make a 2D array from an array of arrays. The `cols' and `dtype' arguments can be omitted if the array is not empty.

input: coords: (n, 3), new_xyz: (m, 3), color: (n, c), idx: (m, nsample), offset: (b), new_offset: (b) output: new_feat: (m, nsample, c+3), g

Ravel the coordinates after subtracting the min coordinates.