[Bf-committers] Alembic support in Blender

Lukas Tönne lukas.toenne at gmail.com
Tue Mar 3 13:49:56 CET 2015


Martijn Berger (Juicyfruit) has done a great job making an Alembic fork on
github, to get rid of all the annoying cmake errors in Alembic sources.

https://github.com/martijnberger/alembic

A pull request has been made to try and get these changes into Alembic. For
the time being i would suggest using Martijn's version, which apart from
build file fixes is the same as official Alembic.

On Tue, Mar 3, 2015 at 11:48 AM, Lukas Tönne <lukas.toenne at gmail.com> wrote:

> I didn't manage to compile with scons yet, but that's mostly because of
> library path issues and time constraints on my side. The buildbot also uses
> scons, so if there are remaining issues we will fix them in the process of
> getting the buildbot updated.
>
> On Tue, Mar 3, 2015 at 10:54 AM, Piotr Arlukowicz <
> piotao at polskikursblendera.pl> wrote:
>
>> WOW, that's a long awaited news! Thank you Lucas!!!
>>
>> what about scons integration? Can I check this out?
>>
>> regards
>> Pio
>>
>> ​Piotr
>> ​ Arlukowicz, BFCT​
>>
>> ​*YT: /user/piotao?feature=guide*
>>  *FB:* */polskikursblendera* *TW:*
>> */piotao*
>> *Blender Network:* *https://www.blendernetwork.org/piotr-arlukowicz
>> <https://www.blendernetwork.org/piotr-arlukowicz>*
>> *Polski Kurs Blendera:* http://polskikursblendera.pl
>>
>>
>>
>>
>> 2015-03-02 19:24 GMT+01:00 Lukas Tönne <lukas.toenne at gmail.com>:
>>
>> > It's about to get real!
>> >
>> > The Gooseberry team would like to start using the new caching system
>> with
>> > Alembic ASAP. This means that we should make sure Alembic dependencies
>> and
>> > the library itself can be properly built and linked by Blender. First
>> goal
>> > is Linux (since we use it in the Blender Institute), but of course it
>> > should work on all platforms. To avoid confusion i will specify exactly
>> > which versions we need to use.
>> >
>> > The plan is to first merge the Alembic branch into our gooseberry branch
>> > for testing and refinement. However, setting up Alembic build systems on
>> > the official buildbot and release build systems would help avoid future
>> > problems and smooth out the procedure of merging with master later on.
>> >
>> >
>> > As a template for working around build system quirks the usual
>> > install_deps.sh script is available. This builds the Alembic library on
>> a
>> > standard Ubuntu 14.10 installation. In addition, it tweaks a couple of
>> > build files in the Alembic sources in order to disable certain parts
>> that
>> > have badly defined build scripts (examples, tests) - there may be more
>> > proper ways of treating these build file issues.
>> >
>> > First a couple of links:
>> >
>> > Official Alembic site:
>> > http://alembic.io/
>> >
>> > The branch on phabricator:
>> >
>> https://developer.blender.org/diffusion/B/repository/alembic_pointcache/
>> > Can be checked out using:
>> > git clone git://git.blender.org/blender.git -b alembic_pointcache
>> >
>> > The main Alembic section of the install_deps.sh script (see XXX parts
>> ...):
>> >
>> >
>> https://developer.blender.org/diffusion/B/browse/alembic_pointcache/build_files/build_environment/install_deps.sh;1a9c74a3a8fcd4dda3ec2ca09b3fd00e85cb0627$1733
>> >
>> > The Alembic version we use is 1.5.5 (official release), which can be
>> > checked out using mercurial/hg like so:
>> > hg clone -u 1_05_05 https://code.google.com/p/alembic/ <target dir>
>> >
>> >
>> > The README.txt file in the Alembic source directory mentions the
>> principle
>> > build procedure and dependencies.
>> > https://code.google.com/p/alembic/source/browse/README.txt?name=1_05_05
>> > All of the mandatory dependencies are already part of the standard
>> Blender
>> > dependencies in their required versions, so no major additions other
>> than
>> > Alembic itself should be needed. For reference, here are the required
>> > dependencies of Alembic with their minimum versions (as stated in their
>> > README) and the current versions installed by Blender's install_deps.sh
>> > script:
>> >
>> >             Alembic minimum     Blender             Ubuntu 14.10
>> > Boost       1.44.0              1.51.0
>> > IlmBase     1.0.3               2.2.0
>> > HDF5        1.8.9               -----               1.8.12
>> > OpenEXR     1.7.1               2.2.0
>> > zlib        (unspecified)       (unspecified)       1.2.8
>> >
>> > HDF5 is entirely optional and can be installed to enable this container
>> > format for file storage. The branch now uses the Ogawa format by
>> default,
>> > which seems to have become the new standard backend (and does not need
>> > additional libraries). The default system version of HDF5 on ubuntu also
>> > seems to work fine ('libhdf5-7' package).
>> >
>> >
>> > Blender itself has 2 new build options:
>> > WITH_ALEMBIC : Build with Alembic caching support. Currently this is
>> needed
>> > for the branch to work, otherwise there is no available implementation
>> of
>> > the cache interface and a number of functions would probably crash
>> trying
>> > to access a NULL pointer.
>> > WITH_HDF5 : Optional linking with HDF5. This backend is not used atm, so
>> > the build option should not be needed.
>> >
>> > New cmake modules FindAlembic.cmake and FindHDF5.cmake have been added
>> to
>> > simplify setting up library and include paths for Blender builds.
>> >
>> >
>> > I would very much appreciate help in ironing out remaining issues and
>> > getting libraries for OSX and Windows set up.
>> > Thank you!
>> > _______________________________________________
>> > Bf-committers mailing list
>> > Bf-committers at blender.org
>> > http://lists.blender.org/mailman/listinfo/bf-committers
>> >
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