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NEWS.txt
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2021-06-08, Alembic 1.8.2
Thanks to your feedback and submitted issues we have a few bug fixes.
Ogawa:
One of the fuzzer tests were was failing with 32 bit builds because of a
different exception message.
Fix a bug with 32 bit memory mapped Windows builds.
CMake:
Look for boost python a little differently, falling back on existing behavior.
2021-05-15, Alembic 1.8.1
Thanks to your feedback and submitted issues we have a few bug fixes.
CMake:
Get the python bindings building on MacOS. (Issue 340)
Fix the capitalization of the Imath find_depencency in AlembicConfig.cmake
so that Imath will be found when used by external projects.
(Issue 341 and 343)
Ogawa:
Address Fuzzer issue 33685 sanity check that we have a valid group to avoid
infinite recursion during traversal.
2021-04-17, Alembic 1.8.0
Thanks to your feedback and issues we have a few bug fixes and enhancements.
API:
We are dropping support for the ancient TR1 and expect the compilers to at
least support C++std11, we currently default to C++std14. Because we now
assume at least C++std11, we can remove ALEMBIC_LIB_USES_TR1 and
ALEMBIC_LIB_USES_BOOST and we instead expect the std versions of things like
shared_ptr. (Issue 312)
Ogawa:
Better support emscripten and ARM toolchains by using memcpy to avoid
dereferencing non-aligned pointers. (PR 332)
Python:
Support building python3, and make it the default, to build the bindings
against python2 use: -DUSE_PYALEMBIC=ON -DPYALEMBIC_PYTHON_MAJOR=2
Switch from __nonzero__ to __bool__ for the python3 bindings. (Issue 273)
Workaround the testCollections crash. (Issue 274)
Make the unit tests python 2 and python 3 compatible. (Issue 276)
Rework the python testing framework so they can be run from CMake. (Issue 278)
Switch from next to __next__ for the python3 bindings. (Issue 279)
Utils:
AbcStitcher:
Propagate MetaData from the first of our ordered input archives over to the
stitched output. (PR 324)
CMake:
Update the minimum requirement to 3.13
Overhaul to support the recently released Imath 3.
(https://github.com/AcademySoftwareFoundation/Imath)
Fix for using Alembic as a 3rd party with Imath 3. (Issue 337)
Use Boost_VERSION_MACRO instead of Boost_VERSION. (PR 338)
=======
2020-10-23, Alembic 1.7.16
Thanks to your feedback,and pull requests a couple of bug fixes and a GitHub
enhancement.
GitHub:
Add a Github Action to create a python 2.7 wheel. (PR 310)
AbcCoreHDF5:
Specify char signedness when setting the HDF5 data type as some architectures,
like ARM, default to unsigned. (PR 316)
AbcCoreOgawa:
Fuzzer issue 25695: Fix leak that can occur when reading meta data, but the file
is maliciously cut short. (PR 315)
Fuzzer issue 26125: Add a check and throw an excpetion for an obviously
recursive group. (PR 321)
2020-09-10, Alembic 1.7.15
Thanks to your feedback and issues we have a few bug fixes and an enhancement.
AbcCoreOgawa:
Fuzzer issues 25166, 25175, 25185, 25204, and 25236 all test for illegal
meta data index values which we more carefully test.
Fuzzer issue 25192 turned up a leak from a malformed file causing OrData to
throw.
Tests:
Clang was flagging an unused variable in AbcMaterial tests.
CMake:
Add DOCS_PATH variable which will add Doxygen as a target and cause the
generated html directory to be installed to that location. We remove the
Doxygen file from the project and now use CMakes module to configure it.
2020-07-22, Alembic 1.7.14
Thanks to your feedback,issues, and pull requests we have several bug fixes and
a few enhancements.
API:
Ogawa:
Fix another Fuzzer issue with Ogawa::IData allocating too much memory
because of a malicious file. Add tests for Fuzzer issues:
24846, 24853, 24598, 25051, and 25081. (PR296)
Add support for the Haiku OS. (PR298)
Murmur3:
Add preprocessor define to support FreeBSD. (Issue 288)
Remove Murmur3 from the LICENSE.txt since it was moved into the public domain
a while ago, and is reflected as such in the code. (Issue 292)
AbcGeom:
Fix uninitialized member variable in OTypedGeomParam. (PR290)
HDF:
Remove some unused local functions. (Issue 293)
Python bindings:
Add GetArchiveStartAndEndTime. (PR291)
Add optional dccFPS to the GetArchiveInfo dict. (PR294)
2020-07-11, Alembic 1.7.13
Thanks to your feedback and many issues submitted as well as a few pull requests
we have several bug fixes.
API:
Ogawa: Google generously setup AutoFuzz and it found several issues when
reading maliciously created files. These issues reported issues are fixed:
253-258, 269-272, 282, 283 (PR266)
Maya:
AbcImport: Add support for connecting MFnData::kFloatArray.
Build:
Fix issue where WFObjConvert headers were being put in the wrong place when
installed. (Issue 264)
Partly address Issue 265 by making some adjustments to the Doxyfile and remove
a very old reference to MD5Hash in the very old Houdini SOP.
Partly address issues outline in PR268, use MSVC instead of Windows variable
as they are Visual Studio specific flags and define
-Wno-error=implicit-fallthrough for CLANG and GCC 7 and up.
2019-10-25, Alembic 1.7.12
Thanks to your feedback and numerous pull requests we have several enhancements
and bug fixes.
API:
Use critical section instead of mutex on Windows. (PR220)
ErrorHandler now uses const char * for message instead of std::string for
efficiency gain. (PR221)
Fix incompatibilities with C++17. (PR237)
Add optional DCC FPS hint when calling CreateArchiveWithInfo and
GetArchiveInfo. (PR241)
Maya:
AbcExport: Support writing animated facesets. (PR217)
AbcExport: Support per curve width. (PR239)
AbcExport: When writing sparse data like just the UVs, create an OObject
instead of an OXform. (PR241)
Utils:
WFOBJConvert: Fix bug where OBJ files with more than one shape would fail to
properly convert UVs and Normals. (PR232)
CMake:
Make it easier to select the python version to build against. (PR215)
2019-5-16, Alembic 1.7.11
Thanks to your feedback and numerous pull requests we have several enhancements
and bug fixes.
CMake:
Make ILMBase detection compatible with certain older versions. (PR207)
Allow Alembic to build against a custom Python installation. (PR208)
OpenMayaMac.h was removed from the DevKit since Maya 2016. (Issue210)
API:
Fix bug in OSubD where the detection of a partial sample was incorrect.
Maya:
AbcExport: Fix issue where certain user properties were incorrectly being
written as arbGeomParams. (Issue 209) (PR211)
AbcExport: Fix an issue with acyclic detection because of floating point
inaccuracy. (PR213)
2018-12-5, Alembic 1.7.10
Thanks to your feedback and numerous pull requests we have several enhancements
and bug fixes.
API:
Check to see if the OCompoundProperty already exists before trying to create
a new one. (PR200, Issue 188)
Explicitly include errno.h for compilers that don't bring it in as part of the
other includes. (Issue 199)
Maya:
Support reading and writing nParticles as I/OPoints. (PR163)
Houdini:
Update the example SOP to work with Houdini 16.5, support layering,
and take advantage of the Houdini API for faster geometry building. (PR196)
2018-9-7, Alembic 1.7.9
Thanks to your feedback and numerous pull requests we have several enhancements
and bug fixes.
API:
Add memory mapped read support for Ogawa, which is now on by default but
can be toggled off via Alembic::AbcCoreFactory::setOgawaReadStrategy.
Read speed is improved by about 10-25% on Linux and potentially much more on
Windows. (PR 187)
Make getOrders and getKnots const on Alembic::AbcGeom::ICurves. (PR 162)
Remove prefix _ in our include guards to be ISO conformant. (PR 192 and 194)
Remove some unnecessary null pointer checks before deleting an object. (PR 193)
When "wrapping" an IObject around the ISchemaObject properly copy the IObject
so that the instancing info is copied over as well. (PR 195)
Maya AbcImport/AbcExport:
Update several deprecated Maya API function calls. (PR 173)
Clean up some compiler warnings and add override keyword to a few methods.
(PR 174)
Prevent crash for importing certain invalid NURBS surfaces and add the error
message when the NURBS surface can't be created. (PR 175)
Alembic file translator now resolved in the same way as the AbcImport command.
(PR 176)
Fix per-face shader assignments not merging if the mesh to merge is an
intermediate object. (PR 177)
Utils:
AbcStitcher:
Fix crash when trying to stitch subd corner sharpness. ( PR 181 )
CMake:
Use /bigobj flag for Visual Studio 2008/MSVC15.
Use PyAlembic as a target and property name to avoid a naming conflict.
Python binding alembic.so should be alembic.pyd on Windows. ( PR 172 )
Add the msvc14fixes.cpp for the python bindings if using MSVC 14 2015 Update 3.
##-*****************************************************************************
2018-4-30, Alembic 1.7.8
Thanks to your feedback and generous pull requests we have some enhancements.
CMake:
Add ability to specify where to install the Alembic libraries. (PR 165)
Add option to NOT build the library. (PR 166)
Add option to specify where to install the python module. (PR 167)
Add option to specify where to intall the Maya plug-ins. (PR 168)
Utils:
AbcStitcher: Add verbose flag and try to accomodate stitching sampling with
the same time sampling but with slightly different start times in the same
IArchive. (PR 169)
2018-3-23, Alembic 1.7.7
Thanks to your feedback and pull requests we have a few bug fixes and an
enhancement.
API:
Fix bug where std::weak_ptr was used in AbcCoreLayer instead of
Alembic::Util::weak_ptr.
Add OCurves::Schema::Sample::setPositionWeights to go along with the get.
Expose it in the python bindings.
prman Procedural:
Add two options, -motionbegin and -motionend to explicitly control MotionBlocks.
(PR 160)
##-*****************************************************************************
2018-3-7, Alembic 1.7.6
Thanks to your feedback and pull requests we have a few bug fixes.
API:
Fix memory issue when traversing an AbcCoreLayer hierarchy that also happens to
use heavy instancing. (PR 151)
Work around a pread OSX issue when trying to read data samples over 2 GB, by
reading it in smaller chunks. (PR 153 and PR 155)
Fix bug in AbcCoreLayer where the replace/prune logic was occurring in the
opposite order of the data layering. We've adopted the data layering order
style. (data in the first file specified overrides later files)
(PR 156 and PR 157)
Here is the canonical example order:
sparseAnimatedPoints.abc sparseUVs.abc base.abc
Python:
Work around compiler bug in MSVC14 Update 3 involving boost::python. (PR 154)
prman Procedural:
Support widths on IPoints. (PR 147)
Support visibility on IPolyMesh. (PR 148)
##-*****************************************************************************
2017-12-20, Alembic 1.7.5
Thanks to your feedback we have a bug fix:
API:
Fixed bug where getPropertiesHash and getChildrenHash were returning the wrong
value for AbcCoreLayer archives that are made up of only on file. (PR 143)
##-*****************************************************************************
2017-10-12, Alembic 1.7.4
Thanks to your feedback and pull requests we have a few bug fixes and an
enhancement.
API:
Do not allow scalar properties to match when they have the same data type
but different extents. This is to avoid a segfault on getValue. (Issue 138)
Add: const AbcA::ObjectWriterPtr getPtr() to OObject.h (PR 141)
Remove an accidental circular include dependency in AbcCoreLayer. (PR 141)
##-*****************************************************************************
2017-8-9, Alembic 1.7.3
Thanks to your feedback we have a bug fix introduced in the previous release.
API:
Fix a bug where a file opened as Ogawa but not Ogawa would be closed twice
causing issues on Windows. (Issue 135)
##-*****************************************************************************
2017-7-21, Alembic 1.7.2
Thanks to your feedback and pull requests we have a few bug fixes and
enhancements.
API:
Fix bug with IFaceSet::getFaceExclusivity (Issue 129)
When reading directly from a file with Ogawa use pread/ReadFile so we don't have to use a file descriptor per stream. (Issue 124)
Misc:
Propagate HDF5 dependency when doing a static build mentioned in Issue 126. (pull request 128)
Fix up several other minor CMake issues mentioned in Issue 127. (also pull request 128)
Make sure the shared library is given a major/minor version. (based on pull request 125)
##-*****************************************************************************
2017-3-24, Alembic 1.7.1
Thanks to your feedback and pull requests we have a few bug fixes and
enhancements.
API:
Address Issues 110 and 114 make a few member functions const.
Maya AbcExport:
Fix call to isAnimated when writing Nurbs curves.
Tools:
Fix issue 101 which was a crash in abcls by being careful when
printing certain strings.
Rework AbcDiff so it better handles completely different hiearchies,
and only attempts to do diffs on Ogawa files so we can take advantages
of the computed hashes.
Misc:
Add continuous integration to the project via Travis. (pull request 98)
Issue 104 turned up a problem with one of the tests when using newer
versions of HDF5. This test can be removed.
Fix small typo in code comments. (pull request 105)
Make sure to use python 2, even if 3 can be found since some of the
dependent binaries don't support it. (pull request 108)
Fix typo in CMake Cxx11 variable name mentioned in Issue 115.
##-*****************************************************************************
2016-11-7, Alembic 1.7.0
Hello Alembic users,
Thanks to your feedback we are introducing the new layering functionality to Alembic, as discussed here:
https://groups.google.com/forum/#!topic/alembic-discussion/s0zm8VEBMOk
AbcCoreLayer was developed collaboratively between Blizzard Entertainment and Sony Pictures Imageworks and is a way for you make sparse changes to an Alembic file by writing those changes into any number of other Alembic files, and combining them on read via AbcCoreLayer.
Here are some examples of what you can do via layering:
You can add additional properties to a shape.
Example: Adding UVs to a polymesh that currently lack them
You can override properties.
Example: Override static points on a polymesh with animated points.
You can add new objects.
Example: Add a shape to an existing hierarchy.
You can prune objects.
Example: Remove shapes you don't like, or entire branches of the hierarchy.
You can prune properties.
Example: Removing incorrect normals.
You can replace an object hierarchy with a different one.
Example: You can replace separate curves groups with one big one.
You can replace property hierarchy.
Example: Don't like a bunch of properties in user properties? It can be replaced with a bunch of other properties, without needing to prune individual properties.
AbcCoreLayer provides a SetPrune and SetReplace convenience function in Util.h, for setting up the MetaData appropriately.
Maya:
AbcImport: Support AbcCoreLayer by specifying more than one file to the AbcImport command.
AbcExport:
Support writing only UVs via -uvsonly or -uvo flag.
Utilities:
AbcDiff: Given 2 Alembic files, create a sparse diff between them.
Other changes:
API:
Internally keep track of how many bytes we've written to reduce the number of potentially expensive calls on write.
https://github.com/alembic/alembic/pull/90
Harden some unnecessary templated constructors in Abc and AbcGeom.
Deprecate (but do not remove) constructors that take the kWrapExisting and kTop flag and provide reasonable constructors that don't use these flags in Abc and AbcGeom.
##-*****************************************************************************
2016-7-12, Alembic 1.6.1
Hello Alembic users, thanks to your feedback and reports we have a few bug
fixes and enhancements.
API:
OPoints::setFromPrevious was not setting the previous velocity sample.
(pull request 85)
Fix small bug with AbcCoreOgawa::StreamManager COMPARE_EXCHANGE macro on Windows
(pull request 86)
Maya:
Fix some unused variable warnings in AbcImport, AbcExport.
Utils:
AbcStitcher: Support stitching mixed indexed and non-indexed GeomParams.
##-*****************************************************************************
2016-6-30, Alembic 1.6.0
Thanks to your generous feedback and code contributions we are happy to announce
the 1.6.0 release of Alembic.
We've overhauled our build system, gotten rid of alembic_bootstrap.py in favor
of going native CMake. We now better support Windows and also now require at
least version 2.8.11 of CMake.
For the latest build instructions please see:
https://github.com/alembic/alembic/blob/master/README.txt
Other changes include:
Moved several core utilities out of examples and into bin.
Make HDF5 an optional dependency.
Allow install directory prefix to be explicitly set.
(pull request 46)
Add CMake generated configure file, so that the version of the project only
needs to be set in one place, users know if Alembic was built without HDF5
support, and whether it is using tr1, boost, or neither. (C++11) as a
dependency.
API:
Add ability to create a Windows dll, and add symbol visibility flags for other
compilers. (pull request 14)
Improve Ogawa write speeds on Windows by adding a larger buffer.
(pull request 38)
Make the 3 int values on OSubD optional.
(faceVaryingInterpolateBoundary, faceVaryingPropagateCorners, and
interpolateBoundary issue 34)
Remove unnecessary scoped static initialization of some variables. (issue 27)
Arnold Procedural:
Add Ogawa support. (pull request 20)
Maya:
Support exporting MFnFloatArray. (pull request 45)
Fix bug when Nurbs curves group are only animated via the transforms and speed
up the isAnimated check. (pull request 82)
Many AbcImport/AbcExport changes based on feedback and contributions from
Autodesk, and to bring the plugins more into line with what is in the devkit.
(pull request 51 and 62 through 79)
##-*****************************************************************************
2015-1-15, Alembic 1.5.8
Hello Alembic users, thanks to your feedback and reports we have a few bug
fixes and enhancements.
API:
AbcCoreAbstract:
Fix wstring array hash calculation. (pull request 17)
Build system:
Make the OS X version check more robust to determine if C++11 flag is required.
(pull request 18)
Python:
PyAlembic:
Add asOgawa option for PyOArchive and make Ogawa the default for
CreateArchiveWithInfo. (pull request 16)
##-*****************************************************************************
2015-12-09, Alembic 1.5.7
Hello Alembic users, thanks to your feedback and reports we have a few bug
fixes and enhancements.
Python:
Add missing methods to IPoints.
Add Points schema to cask.
(pull request 12)
Cask:
Add oproperty mapping for additional imath classes.
Add iproperty to oproperty class mapping using pod, extent values.
Remove named oproperty override mapping (replaced by above methods).
Add metadata accessor to property class.
Fix is_deforming method on objects.
(pull request 15)
Maya:
AbcExport:
Add support for writing out all UV sets on an MFnMesh with the
-wuvs/-writeUVSets flag. (pull request 13)
AbcImport:
Support loaidng multiple UV sets on an MFnMesh when present. (pull request 13)
##-*****************************************************************************
2015-10-17, Alembic 1.5.6
Hello Alembic users, thanks to your feedback and reports we have a few bug
fixes and enhancements.
API:
AbcCoreAbstract:
Improve stability of TimeSamplingType equality comparison. (pull request 11)
Maya:
AbcExport:
Recognize "faceVaryingInterpolateBoundary" not "facVaryingInterpolateBoundary"
plug when writing out an MFnMesh as a SubD. (pull request 6)
Don't produce an error for meshes without valid per-face mapping, e.g. whole
object mappings. (pull request 6)
Only create face sets for shading groups applied with with per-face mappings.
(pull request 6)
Make sure a schema that is detected to be static is written out with the
default time sampling. (pull request 7)
AbcImport:
Don't warn about UVs or normals size being mismatched if the mesh has no
points. (pull request 8)
Connections to custom VectorArray and PointArray properties will no longer fail.
(pull request 8)
Support varying or vertex color properties and unpacking them into facevarying
as Maya requires. (pull request 8)
Only call setUsedAsColor for attributes that are constant scoped.
(pull request 8)
Utilities:
AbcStitcher:
Revamp AbcStitcher to better handle cases where certain shapes or properties
may not exist in some of the files. (pull request 7)
Build system:
Boost_PYTHON_LIBRARY is case sensitive. (pull request 8)
##-*****************************************************************************
2014-07-15, Alembic 1.5.5
Hello Alembic users, thanks to your feedback and reports we have a few bug
fixes and enhancements.
API:
AbcGeom:
Fix bug in OSubD::setHoles where corner indices were being set instead.
AbcCoreAbstract:
Improve lookup times and numerical stability of TimeSampling.
AbcOpenGL:
Camera rotations are now done in X,Y,Z order instead of Z,X,Y
Python API:
PyAlembic:
Address Issue 347, expose the CoreType in python.
PyAbcOpenGL:
Wrap ALEMBIC_LIB_USES_BOOST around get_pointer.
Maya:
AbcExport:
If a shading group has an attribute named AbcFaceSetName, use that attribute
instead of the shading groups name for the face set name.
Fix for Issue 339, some dag nodes can't be pushed onto MDagPath, so make sure
the push was successful to avoid infinite recursion.
Fix for Issue 342, for improved performance skip over shadingEngines and
subgraphs in util::isAnimated.
AbcImport:
Set AbcFacesetName attribute on newly created shadingGroups.
Fix bug with open form check on curves.
Fix bug with restoring knots from a curve group with more than one curve.
Tools:
AbcView:
Fix for Issue 344, show array property values of length 1.
Improve performance for some graphics cards by adjusting some drawing options.
(also done in SimpleAbcViewer)
abcls
Add -v option to automatically display the first sample of all properties.
Print an error message when seg fault is detected.
cask:
Fix for Issue 345, handle V3d and double array on write.
Default to Ogawa on write.
Fix for Issue 346, TimeSampling is now preserved for properties that are
copies on write.
##-*****************************************************************************
2014-03-28, Alembic 1.5.4
Hello Alembic users, thanks to your feedback and reports we have a few bug
fixes and enhancements.
API:
AbcGeom:
Fix for Issue 333, optional property samples not being filled in correctly
after being defined previously but not set on the current sample.
AbcOpenGL:
Fix for Issue 324, adjust dolly and clipping plane values when they get
a bit extreme.
Python:
Updates for sphix docs
AbcView:
Fix static normals on animated archives.
Fix remove item bug.
Fix import session fle bug.
Add Review mode.
Support custom scripts.
Maya:
AbcExport:
Write out NURBS curves as actual NURBS curves.
AbcImport:
Support reading NURBS curves.
Use Alembic::Util::shared_ptr instead of std::tr1::shared_ptr in one spot.
Util:
AbcEcho:
Fix bounds calculation on AbcBoundsEcho.
Add an optional seconds argument for time sampling support.
Build:
Use C++11 for OSX Mavericks.
Define ALEMBIC_LIB_USES_BOOST to accomodate python bindings.
Use LIBPYTHON_VERSION to determine which python to use.
##-*****************************************************************************
2013-12-17, Alembic 1.5.3
Hello Alembic users, thanks to your feedback and reports we have a few bug
fixes and enhancements.
API, Ogawa:
Don't open extra filestreams until they are needed.
Maya, AbcImport:
Fix for issue 251, if connections to the immediate children of the archive fail
warn about it.
Relax naming constraints on connection so that if the namespace is different
between the Maya scene and the Alembic archive, they can still connect.
Specifying a Maya node to -connect which doesn't match any of the children of
the immediate root of the archive, try and connect below that specified Maya
node.
Python:
cask:
Fix for issue 318, make sure the archive gets released properly.
abcview:
Fix bug where animated normals weren't being updated for display.
##-*****************************************************************************
2013-12-6, Alembic 1.5.2
Hello Alembic users, thanks to your feedback and contributions we have another
collection of bug fixes and enhancements to the API.
API:
Add Nurbs Curves support to I/OCurves, also addresses Issue 249.
Most reference implementations have not yet been updated to support it.
Add SetSourceName, GetSourceName, SetIsUV, isUV utility functions and
setUVSourceName member function on OPolyMeshSchema and OSubDSchema.
Don't assert in TimeSampling::getNearIndex if the floor index and the ceil index
are the same.
Address several clang compile warnings. Part of Issue 322.
AbcCoreHDF5 and AbcCoreOgawa:
Fix reported thread-safety issues.
Python bindings:
Fix for issue 326.
"error: control reaches end of non-void function" in PyIArchive
Add Nurbs Curves support to I/OCurves.
Note: The expected number of knots per curve is the number of vertices in the
curve plus the order of the curve.
Add SetSourceName, GetSourceName, SetIsUV, isUV utility functions and
setUVSourceName member function on OPolyMeshSchema and OSubDSchema.
AbcOpenGL:
Fix for issue 324, clamp values instead of asserting.
Misc Tools:
AbcStitcher:
Support stitching Nurbs curves.
Fix bug where the output file would only be HDF5.
Fix bug where invalid metadata and name were used for leftover objects.
Fix bug where top object was gotten before checking for archive validity.
Add additional check and error message if the number of children nodes aren't
the same between the IObjects from different archives.
AbcTree:
Rename variable to fix shadow warning on some compilers. Issue 320.
Windows compatibility fix, S_ISDIR doesn't exist.
AbcLs:
Windows compatibility fix, S_ISDIR doesn't exist.
Fix the way certain scalar properties print.
##-*****************************************************************************
2013-9-18, Alembic 1.5.1
Hello Alembic users, thanks to your feedback we have another collection of
small but useful bug fixes and enhancements to the API, some of the example
tools, and the Maya plugins.
API:
IXform/OXform:
Make default identity xforms use even less disk space.
Fix for Issue 313: IXformSchema::getInheritsXforms() crash with no samples
Python bindings:
Fix for Issue 308: ILightSchema.getCameraSchema() segfaults when no cameras
are available
Maya:
AbcImport:
Fix for Issue 311: properly set SubD creases, corners, and holes when the
geometry is animated
Fix for Issue 312: AbcImport doesn't accept long names when filtering
AbcExport:
Ogawa is now written out by default. (when the -dataformat flag isn't specified)
Multiple frame ranges can be specified for more control over the samples
exported.
-preRoll flag was added for specified frame ranges that you want evaluated but
not exported.
Misc Tools:
AbcLs - fix bugs, added new flag -s to view the size of a scalar or array
property, -t for printing time info of the archive and the time a sample
index of a property corresponds to. -f prints out the frame assuming 24fps.
AbcView - tweaked docs, lots of bug fixes, better camera support
prman Procedural - Fix for Issue 314: subdiv tags could become corrupted.
##-*****************************************************************************
2013-7-22, Alembic 1.5.0
Hello Alembic users, we are pleased to announce the official release of a new
data back end for Alembic, codenamed Ogawa with improved write, read, and
especially multi-threaded read performance.
Here are some improvements we are seeing with this version:
1) File sizes are on average 5-15% smaller. Scenes with many small objects
should see even greater reductions.
2) Single-threaded reads average around 4x faster
3) Multi-threaded reads can improve by 25x (relative to the same operations in
the existing HDF5 back-end) on 8 core systems.
We are maintaining backwards compatibility, and you will be able to continue to
read and write Alembic files backed by HDF5.
Other library features added:
Support for explicit hierarchical deduplication. (OObject::addChildInstance)
Hierarchical hash keys added to objects, making it easier to compare sub-graphs
of various archives. (IObject::getPropertiesHash, IObject::getChildrenHash)
Add AbcCoreFactory::IFactory class which is a convenience class for determining
whether an archive is backed by HDF5 or Ogawa and returning a properly
instantiated IArchive. All of the readers in the repository have been updated
to use this.
Python bindings have been extended to support the new features above.
New utility:
abcls this utility is meant to behave like ls or h5ls and offers an
inexpensive way to explore your object and property hierarchies.
Bug fixes:
ICamera:
Getting the film back xform channels needs to be done by index.