dilate voxels from a PointDataGrid about openvdb

[Idclip]

Hi @PerspectivesLab,

The topology of PointDataGrid's is slightly more locked down than that of other grid types as the idea is that the active states of PDG voxels represent whether that voxel contains any points or not (you can manipulate this yourself but a lot of tools work on that assumption) - so I wouldn't be suprised if the dilate/erode methods do nothing for PDGs. We can add a static_assert to this method so that it doesn't compile for PDGs if that's the case

i tried clip, clipGrid, ( to slow ), is there a fast way to slice/cut voxel volumes in a grid with an overlap/padding between voxels ? ( ex 0.3 )

I'm not 100% clear on what you're trying to do here - dialteActiveValues only works on the topology of the provided grid, so even if it was allowed to change the active states of PDG voxels, it wouldn't move the points or change their positions. Can you elaborate on what you're trying to do?

[PerspectivesLab]

Hi @Idclip, thank's for the clarification,

what i am trying to do at the moment, is serializing each voxels ( size 2 ) points to file,
i would need to include points from adjacent voxels but only in the limit of a bounding box, let say 2.6 ( main voxel: 2 + 0.6 on each axis to gather neighboor points ).

i know i can iterate adjacent voxels from a voxel and gather the points as
for (int n = 0; n < 26; n++) { Coord neigh = util::COORD_OFFSETS[n]; } => check if inside the main Bbox, append points..
but it seems i cant get the point indexes inside some of the adjacent voxels ( they contain points ), but voxel is flagged as off...

but i would like to avoid if/statements in order to be fast.

the main idea i had, was looking for a function to scale the voxel grid (all voxels from their center, only their bounds, not the data) so they overlap ( 0.3 ),
in that way i could just iterate once each voxel's and serialize the points faster, ( such the idea of dilate grid i had ), let me know if this is more clear, or any faster solution ? thx