Forums Technical Discussion OpenVDB metadata writing in Houdini

OpenVDB metadata writing in Houdini

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diegogarces
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Joined: May 2014
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Hello everyone,
We are using vdb files with points to handle our instances. We need to store some custom information for the file, and we are using the metadata in the .vdb file for that purpose.
Does anybody know if there's a way to write the metadata inside houdini?
We use custom C++ code to generate the .vdb file, but it will be much more useful if we could do it directly from houdini.

Thanks a lot!
Diego
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jbudsberg
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Joined: Aug. 2010
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hey Diego, primitive attributes should be transferred to per-grid metadata. I checked and it seems to work in both the native ROP as well as OpenVDB Write/ExportDriver.

hope that helps!
-Jeff




% openvdb_print /tmp/foo.vdb -metadata
creator: Houdini/SOP_OpenVDB_Write
PlatonicSolid  float (-12,-12,-12)->(12,12,12)       25x25x25  7.67KVox 2.33MB
   background: 0.3
   voxel size: 0.1
   index to world:
      [0.1, 0, 0, 0] 
      [0, 0.1, 0, 0] 
      [0, 0, 0.1, 0] 
      [0, 0, 0, 1] 
   class: level set
   custom_float: 42
   custom_int: 23
   custom_string: bar
   custom_vetor: [2.5, 1.2, 23.4]
   file_bbox_max: [12, 12, 12]
   file_bbox_min: [-12, -12, -12]
   file_compression: blosc + active values
   file_mem_bytes: 2554568
   file_voxel_count: 7674
   is_local_space: false
   is_saved_as_half_float: false
   name: PlatonicSolid
   value_type: float
   vector_type: invariant
Edited by jbudsberg - June 27, 2019 14:46:13

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