CHANGES.md

Change Log

0.4.2 - 2024-05-15

• When upgrading a tileset to version 1.1, then the upgrade command did not yet convert CMPT files into GLB. This functionality was now added via #117, including an attempt to merge multiple GLB files that contain the Cesium glTF metadata extensions. Details of the merge process are not yet specified, but should cover the most common cases that appear during the conversion of CMPT files.
• When upgrading B3DM to GLB, it was possible that the GLB that was contained in the B3DM contained the same accessor for the batch ID attribute in multiple mesh primitives. This could cause the data to be duplicated during the conversion to feature IDs. This was fixed in #124.
• Fixed a bug where the combine operation discarded the transforms and bounding volumes of the input tilesets (#113).
• The createTilesetJson command has been extended to receive an optional cartographic position, which serves as the position of generated tileset (#105).

0.4.1 - 2024-02-20

• The packages that have been introduced in version 0.4.0 have been merged back into a single package. Details about the structure can be found in the implementation notes.

0.4.0 - 2024-02-06 (not released)

• The 3D Tiles Tools have been split into multiple packages. For users of the command-line interface, this should not make a noticable difference: The installed package declares all other packages as its dependencies, and installs them transparently. Structurally, the packages are now organized as a 'monorepo', meaning that all packages are maintained in this repository, in a packages subfolder. Further details about the structure can be found in the updated implementation notes.
• Improved the computation of bounding volumes in #79
  • Some bounding volumes had been computed as bounding spheres or as non-tight-fitting oriented bounding boxes. By integrating the dito.ts library, it is now possible to compute tighter-fitting oriented bounding boxes for tile content (#58) and creating bounding boxes instead of bounding spheres when applying the merge command (#69)
• Fixed a bug where b3dmToGlb left invalid "padding" bytes at the end of GLB data #82
• Added a splitCmpt function to split a composite (CMPT) file into its elements #78
• Extended the support for instanced 3D model (I3DM) files that used a URI to refer to an external GLB file #45
• Fixed a bug where the upgrade of batched 3D models (B3DM) into GLB files with metadata caused errors when the B3DM contained null or undefined strings in its batch table #96
• Fixed a bug where GLB files could not be processed (and caused crashes) when they did not contain a BIN chunk #94
• Extended the upgrade of legacy B3DM that contained glTF 1.0 data with oct-encoded (2D) normals. These normals are now decoded into 3D normals as part of the upgrade #98

0.3.2 - 2023-11-01

• The upgrade command is now removing empty tile.children arrays, setting the children to be undefined instead (via #73)
• Fixed a bug that prevented the content of external tileset to be processed in certain operations (#76)
• Fixed a runtime error that could occur when encoding many textures to KTX (#77)
• Internal:
  • Added meshoptimizer and registered the corresponding encoder/decoder in the preconfigured glTF-Transform IO instance that is used internally (via #74)
  • Exposed all classes (except for the pipeline classes) for internal use (via #75)

0.3.1 - 2023-10-10

• Integrated a dedicated logging library (via #61)
  • By default, only few, informative messages are logged to the console
  • There are additional command-line arguments:
    • --logLevel can be used to set the log level (trace, debug, info, warn, error, fatal, and silent)
    • --logJson to print log messages as JSON instead of pretty-printed
• The convertI3dmToGlb functionality has been added to the CLI (in addition to the existing convertB3dmToGlb and convertPntsToGlb)
• Internal restructuring (mainly for the use of the 3d-tiles-tools in the 3d-tiles-validator):
  • Exposed and generalized GltfUtilities: It now offers a function extractDataFromGlb that returns the JSON- and binary buffer from arbitrary glTF 1.0 or 2.0 buffers
  • Extracted a BinaryMetadata structure from the former BinaryPropertyTable
  • The different representations of ENUM values (namely, as numbers or as strings) had not been handled correctly (via #71)
  • Internal fixes for KTX encoding (via #40 - not yet part of a public functionality)

0.3.0 - 2023-08-30

• Transparently decompress entries in 3tz files when they are compressed with DEFLATE (via #55)
  • The exact behavior in terms of entry compression is not specified yet. This is tracked in #56
• Extended the handling of tileset JSON files for the convert command (via #54)
  • The convert command did not anticipate that the .3dtiles and .3tz formats require the top-level tileset file to be called tileset.json. This is enforced now. For cases where the input is ambiguous (for example, for a ZIP file or a directory that contain multiple tileset JSON files, with none being called tileset.json), the name of the top-level tileset JSON file can be defined with the --inputTilesetJsonFileName command line argument.
• The upgrade command has been generalized (via #41 and #52)
  • The default behavior of the the upgrade command remained unaffected
  • When passing in the --targetVersion 1.1 command line argument, then the upgrade will attempt to do a more extensive upgrade of the (legacy) PNTS, B3DM, and I3DM tile formats. It will convert these tile formats into glTF assets that use the EXT_structural_metadata, EXT_mesh_features, and EXT_instance_features extensions, to represent the former batch- and feature table information. This is intended as a preview feature. The CMPT format can not yet be upgraded. There are corner cases (for example, animations in the glTF assets that are used for I3DM) that can not generically be translated into glTF assets with extensions. The scope and configurability of the command will be extended and specified more extensively in the future.
• The behavior of b3dmToGlb and i3dmToGlb commands has changed: They originally upgraded any glTF 1.0 content that they encountered to glTF 2.0. Now, they only extract the actual glTF data as it is.
• Operations that modified the content of tiles (for example, converting B3DM to GLB) only had been applied to the top-level input tileset. Now, these operations by default are also applied to the contents of external tilesets that are referred to from the top-level tileset (via #42 and #48)
• Certain operations on tilesets caused the output tileset to use a tile.contents[] array even when there only was a single content. This was fixed in #38, to make sure that a single tile.content is used in these cases, and the tile.contents[] array only when there actually are multiple contents.
• Added further structure classes that are (largely) auto-generated from JSON schema (via #36)
  • The classes in the structure/TileFormats package represent the batch- and feature table JSON of the (legacy) tile formats
  • The classes in the structure/Style package represent the JSON structures for 3D Tiles styling

0.2.1 - 2023-04-27

• Internal refactorings and bugfixes for tileset processing and pipelines:
  • The tileset JSON had been written in gzipped form if and only if it was read in gzipped form, to mimic the previous behavior of functions like combineTilesets.js.
  • This caused the tileset JSON to not be zipped even when the gzip command was applied (#22).
  • Now, the tileset JSON will always be written in unzipped form by default.
  • The gzip and ungzip commands are implemented as 'tileset stages' that do not apply any special handling to the tileset JSON.
  • The filters for included- and excluded content types have been mored from the 'content stage' to the 'tileset stage' accordingly, because the content stages already are specific for certain content types, and will check these types internally.
  • The default handling of the case that the included content types are undefined has changed: Content types will be included by default now. To not include anything, and empty array can be used.
• Allow passing options to the upgrade command that will be forwarded to gltf-pipeline
• Added (auto-generated) TSDoc documentation to the 3D Tiles classes in the structure directory
• Fixed a bug in the analyze command that caused a wrong payload length to be reported
• Fixed a bug that caused single-element contents arrays to be created in tiles in BasicTilesetProcessor

0.2.0 - 2023-04-14

• Rewrite

0.1.3 - 2017-04-14

• Cleaned up project files and upgraded dependencies. #70

0.1.2 - 2017-04-07

• Breaking changes
  • extractB3dm and extractI3dm now return the feature table JSON and batch table JSON instead of buffers.
  • glbToB3dm and glbToI3dm now take feature table JSON and batch table JSON instead of buffers.
• Handle b3dm tiles with the legacy 24-byte header. #69

0.1.1 - 2017-03-15

• Breaking changes
  • Renamed tileset2sqlite3 to tilesetToDatabase.
• Added databaseToTileset for unpacking a .3dtiles file to a tileset directory. #62
• Added glbToI3dm and optimizeI3dm command line tools. #46
• Handle b3dm tiles with the legacy 20-byte header. #45
• Added extractCmpt to extract inner tiles from a cmpt tile and the cmptToGlb command line tool. #42

0.1.0 - 2016-12-16

• Initial release.