Point order when exporting

[a.patience]

When exporting data from CC in *.las format, the point order is lost.

For example, I load a file that is ordered by appearance (from an MLS system). When I export the file to a new *.las, having performed *any* changes to it, the file points appear to have been written in random order. I assume it is written by octree depth or some other indexing structure.

My question is, is there a way to retain the order of points in the file upon export?

[daniel]

Nope, there should be no difference... Apart if PDAL (the library responsible of saving LAS files in the 2.10 verdion) do this, but I doubt it a lot.

[a.patience]

Nope, there should be no difference... Apart if PDAL (the library responsible of saving LAS files in the 2.10 verdion) do this, but I doubt it a lot.

Just tested in 2.9 beta and can confirm, my point cloud order is lost of export.

I am loading a *.las (internal las format 1), decimating it 1:2 with the "random" decimation method, then saving to a new file. The new files point order appears to be entirely random.

In some software I'm working on, I rely on point order for some computations, which is how I stumbled upon this.

[daniel]

Oh I thought you didn't perform any "change': the 'random' subsampling tool will change the order (and il will do it 'randomly' as it randomly picks the points until it has enough of them...). By the way all the subsampling options will change the order (even if the other algorithms are using the octree order instead of a random one).

[a.patience]

Oh I thought you didn't perform any "change': the 'random' subsampling tool will change the order (and il will do it 'randomly' as it randomly picks the points until it has enough of them...). By the way all the subsampling options will change the order (even if the other algorithms are using the octree order instead of a random one).

My apologies, originally I thought it was reordering them even without editing the data.

Is there a way to reorder the points by a scalar value in CC?

I've written my own sorting algorithm but would like to not have to jump between apps.

[daniel]

Nope, there's no such function...

[a.patience]

Nope, there's no such function...

No problems. Any chance of seeing point ordering functionality in the future?

[daniel]

Hum, as you are the only user that ever requested this functionality, I doubt it will be implemented by the community soon...