Changelog

All notable changes to this package will be documented in this file.

The format is based on Keep a Changelog and this project adheres to Semantic Versioning.

[2.3.0] - 2022-01-28

Added

Changed

  • When building unsupported standalone targets, Unity excludes the Alembic components from the build.

Fixed

  • Make sure Unity always reads the Face Set names in the correct order.
  • Fixed a compile error when a project does not have the analytics module.

[2.3.0-pre.3] - 2021-10-02

Added

Changed

Fixed

  • Prevent build error when the Scene contains empty AlembicStreamPlayer components.

[2.3.0-pre.2] - 2021-09-02

Added

Changed

Fixed

  • Prevent mesh import failure when changing import options after having set up material assignment overrides.
  • Fixed a UI issue affecting the use of Importer options in multi-editing context.
  • Prevent import failure when material mapping data is inconsistent with Alembic node hierarchy.

[2.3.0-pre.1] - 2021-07-11

Added

  • Added support for importing the cage mesh of SubD Alembic nodes.
  • The Alembic Importer window now has a Material tab to assign materials to the imported Alembic asset submeshes.
  • The Material tab includes a tool to automatically assign materials based on the Face Set names of the original Alembic file.

Changed

  • GameObjects that only have a Transform component are now included when exporting Alembic files.
  • Automatically set the timeline clip length when dragging an AlembicStreamPlayer onto a timeline Alembic track. ### Fixed
  • Fixed a bug that caused Unity Cloth Alembic export to ignore the world scale.
  • Fixed a bug that caused an error when manually adding an AlembicStreamPlayer Component.
  • Prevented material assignments from being lost for a streamed external Alembic file when changing the Alembic source file link.

[2.2.0] - 2021-06-10

Added

Changed

Fixed

  • Fixed an issue where changing the start value of the streaming time range would slightly change the end of range value.
  • Fixed a bug that was causing visual artefacts due to motion vector persistence when pausing Alembic playback.

[2.2.0-pre.4] - 2021-04-27

Added

Changed

Fixed

  • Fixed a bug that caused out of project stream files to have the wrong number of material slots.
  • Fixed a bug that was causing data loss when resetting the AlembicStreamPlayer.
  • Fixed a bug that was converting previous Alembic instance in prefabs into out-of-project references.
  • Fixed a bug that was adding unnecessary Undo events during the Alembic asset import process.
  • Fixed a bug that was re-importing Alembic files on every SRP project start.
  • Fixed a bug that caused standalone builds to fail when the Alembic assets are read-only.

[2.2.0-pre.3] - 2021-04-07

Added

  • New option to automatically add the AlembicCurveRendering components for basic preview of the curves in the Scene.
  • New option to stream Alembic files from outside a Unity project.

Changed

  • Minimum Unity version is 2019.4.
  • Added a custom dependency on the "CurrentRenderPipeline" setting and ensure assigning the correct SRP material by default.

Fixed

  • Fixed a bug that caused the Alembic exporter to fail if GameObjects were being deleted during the recording session.
  • Fixed a memory leak that occurred when using varying topology meshes.
  • Fixed a bug that caused the exported mesh normals to be unreadable in DCCs.
  • Fixed a bug that caused memory leaks when the same StreamPlayer was being Enabled/Disabled/Updated on the same frame.

[2.2.0-exp.2] - 2021-01-21

Added

  • Added support for Stadia standalone builds.
  • Added support for arm64 macOS.

Changed

  • Updated to Alembic version 1.7.16.
  • The package depends on the Cloth Unity Module.
  • Renamed AlembicCurve CurvePointCount to CurveOffsets, and changed the semantic to a stride array.

Fixed

  • Fixed a bug where degenerate triangles would create NaN normals.
  • Fixed a bug in the importer to prevent the Editor from crashing when importing meshes with empty geometry samples.

[2.2.0-exp.1] - 2020-12-17

Added

  • Added support for piecewise constant Curve importing.

[2.1.2] - 2020-12-14

Changed

  • Fixed a bug causing the Alembic binary libraries to be copied into unsupported platform build, eg: iOS.

[2.1.1-pre.1] - 2020-10-21

Changed

  • Added Unity recorder integration (compatible with Unity Recorder >= 2.2.0).
  • When the timeline does discontinuous time updates (scrubbing), the alembic updates the scene synchronously.
  • Updated optional dependency to Burst 1.1.1 or newer.

Fixed

  • Fixed a bug on Windows where file pointers would leak, and after some time all alembic loads would fail.
  • Fixed a bug that caused a crash when exporting a GameObject with a MeshRender but without a MeshFilter Component.
  • Fixed a bug where the visibility was not properly read if it was the only animated property of the object.

[2.0.1-preview.1] - 2020-05-29

Fixed

  • Fixed a crash in the Alembic Exporter when GameObject names contained / in the name.
  • Fixed a bug where the Alembic motion vector direction was inverted.
  • Fixed a bug where the time range slider in the importer inspector breaks when going beyond the upper bound.
  • Fixed a crash in the Alembic Streamer when the object was being enabled and disabled very quickly.
  • Fixed a bug where the exported SkinnedMesh scale was wrong if the transform contained a scale change.
  • Fixed a bug where the exporter was writing the incorrect Camera rotation parameters.

[2.0.0-preview.1] - 2019-12-20

Changes

  • Minimum Unity version is 2019.3.
  • Introduced public API for Alembic playback and recording.
  • Loading of Alembic files is now multi-threaded.
  • Removed the LitAlembic HDRP shader that has been obsoleted by HDRP native shaders that now offers the once missing velocity option.
  • HDF5 format is Obsolete.
  • Fixed a bug where the face-id were being sorted in ascending order.
  • Fixed a bug that caused crashes when importing point clouds that had no velocity information.
  • Fixed a bug that caused exported geometries to have too many triangles.

[1.0.6] - 2019-08-26

Changes

  • Added support for Linux
  • Fixed incorrect normal calculation when the UVs were split
  • Fixed lost references to the scene GameObject when renaming the alembic asset.
  • Fixed the LitAlembic material compatibility with HDRP 4.10 (latest 2018.4 version). For 2019.2+ HDRP standard materials support vertex motion vectors. -Fixed Vertex colour import from Houdini.

Known Issues

  • HDF5 is not supported under Linux for import or export.

[1.0.5] - 2019-05-10

Changes

  • Fixed regression introduced in 1.0.4 where old Alembic scene instances would lose prefab connection. New scene instances made with 1.0.4 are unfortunately unrecoverable

[1.0.4] - 2019-05-02

Changes

  • Fixed crash in the Exporter when using SwapFaces
  • Fixed Branch recording mode in the Exporter
  • Fixed Scene references being lost, when alembic prefab was being renamed
  • Fixed initial import of Alembic files when both the alembic Package and assets are imported at the same time
  • Fixed regression, where absolute paths to alembic assets were stored
  • Alembic importer and Exporter correctly deals with physical Camera parameters

[1.0.3] - 2019-04-09

Changes

  • Do not lock Alembic files when Windows
  • Fix InheritXform on files from Blender
  • Fix multibyte character names for Alembic nodes
  • Fix crash from cyclic sampling
  • Fix crash with empty samples
  • Fix standalone player builds for Windows and OSX. Alembic files are now copied in the StreamingAssets folder of the built application

[1.0.2] - 2019-03-21

Changes

  • Removed BuildTarget.LinuxStandalone (obsolete) references for 2019.2+

[1.0.1] - 2019-03-14

Changes

  • Removed UnityEngine.UI references

[1.0.0] - 2019-01-15

Changes

  • Removed Timeline Alembic recorder
  • General cleanup ### Known Issues
  • The first time the Alembic package is used in a project, the shaders shipped with it need to be reimported, or else all Alembic imports will fail (case 1125012)

[1.0.0-preview.13] - 2019-01-15

Changes

  • Removed broken recording of particles
  • Moved testing code into the package

[1.0.0-preview.10] - 2019-01-15

Changes

  • AlembicShotClip registers the time of the AlembicStreamPlayer as driven so timeline changes to the scene are not persistent
  • AlembicRecorderClip uses tags to target GameObject root when recording a subset of the scene. If there are multiple GameObjects that match this Tag, a warning appears in the inspector and recording is disabled.

[1.0.0-preview.9] - 2019-01-03

Changes

  • Meshes generated by the AlembicStreamPlayer are not serialized with the Scene

[1.0.0-preview.8] - 2018-12-19

Changes

  • Alembic files are No longer copied to the StreamingAssets folder
  • renamed Linux dso to abci.so for consistency
  • reordered DllImport path selection so Editor locations are always found first

Known Issues

  • If you rename the prefab once instantiated, all scene references are lost (move works)

[1.0.0-preview.7] - 2018-11-28

Changes

  • Fixed Windows plugin platform settings
  • Apply Transform On Points is now ON by default to be consistent with mesh behaviour
  • Point clouds are no longer imported by default
  • Bug fix: changes to time range were not persisted
  • Updated label of assumeNonSkinnedMeshRendersAreConstant to "Static MeshRenderers" to prevent cropping at default width

Known Issues

  • Camera objects aren't using Physical Camera mode
  • Points renderer motion vector shader doesn't work
  • Camera nodes are still created as GameObjects even if we don't import cameras
  • AlembicWaitForEndOfFrame script is visible from the Component list in the inspector

[1.0.0-preview.6] - 2018-11-22

  • Apply transform to points renderer by default
  • Don't import point clouds by default

[1.0.0-preview.4] - 2018-10-05

  • Added missing Linux dso

[1.0.0-preview.3] - 2018-09-26

  • Reorganized to conform to Unity's package standards
  • Updated Alembic to 1.7.9 (Ogawa is now memory-mapped by default)

[1.0.0-preview.2] - 2018-09-20

  • Fixed AlembicStreamPlayerEditor warning in Unity 2018.3

[1.0.0-preview.1] - 2018-09-07

  • Added Documentation for imported animation clips
  • Removed UTJ/Alembic/Exporter component menu
  • Normalized all line endings

[1.0.0-preview] - 2018-08-21

  • Updated Documentation
  • Contains all changes up until release 20180413 on github

[0.2.0] - 2018-06-22

  • Internalized the API
  • Updated Documentation
  • Changed namespaces to Unity[Editor|Engine].Formats.Alembic.[Exporter|Importer]
  • Removed Alembic Camera Params component

[0.1.2] - 2018-03-19