Animated trimmed surface failure in AbcExport

[Eddie Offermann]

We encountered a failure in AbcExport's handling of trimmed surfaces. The trim isn't being represented in the resulting .abc file. SimpleAbcViewer shows a similar failure though it shows it in a different way - so I suspect there is an attempt to represent it but that it's failing. I've attached a severely stripped down version of the rig we encountered it on, with some animation applied, to simplify reproduction of the problem.

To replicate the problem, load the attached Maya2012 scene file and run:

if not cmds.pluginInfo("AbcImport", q=True, l=True):

    cmds.loadPlugin("AbcImport")

if not cmds.pluginInfo("AbcExport", q=True, l=True):

    cmds.loadPlugin("AbcExport")

mel.eval('AbcExport -j "-fr 1 96 -sn -uv -ws -wv -rt root -file ~/Desktop/abcTest.abc"')

cmds.file(new=True,force=True)

mel.eval('AbcImport -ftr -m open "~/Desktop/abcTest.abc"')

cmds.play()

This has been encountered in Maya2012 in AbcExport 1.0 using Alembic 1.0.5

[Lucas Miller]

Thank you for the example.

The SimpleAbcViewer currently doesn't try to do anything with trim curves, so it's not a good way to test this case.

This looks like a bug in AbcExport as it is appears to be writing out only the first sample of the trim curve.

Lucas

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[Lucas Miller]

A workaround was checked in here:

http://code.google.com/r/millerlucas-dev/source/detail?r=729472b1ed93cf140e0fce2be3d7b3a73b938823

Lucas

[Eddie Offermann]

Was elated to get this update earlier. Thanks, much: we had a suitable alternative in place on the rig but it made a great impression here (at Mirada) that a workaround came through as quickly as it did. Everyone's been very pleased with Alembic.

On Tuesday, May 22, 2012 3:32:47 PM UTC-7, Lucas wrote:

A workaround was checked in here:

http://code.google.com/r/millerlucas-dev/source/detail?r=729472b1ed93cf140e0fce2be3d7b3a73b938823

Lucas

On Tue, May 22, 2012 at 11:49 AM, Lucas Miller <miller...@gmail.com> wrote:

Thank you for the example.

The SimpleAbcViewer currently doesn't try to do anything with trim curves, so it's not a good way to test this case.

This looks like a bug in AbcExport as it is appears to be writing out only the first sample of the trim curve.

Lucas

On Tue, May 22, 2012 at 11:28 AM, Eddie Offermann <eoffe...@gmail.com> wrote:

We encountered a failure in AbcExport's handling of trimmed surfaces. The trim isn't being represented in the resulting .abc file. SimpleAbcViewer shows a similar failure though it shows it in a different way - so I suspect there is an attempt to represent it but that it's failing. I've attached a severely stripped down version of the rig we encountered it on, with some animation applied, to simplify reproduction of the problem.

To replicate the problem, load the attached Maya2012 scene file and run:

if not cmds.pluginInfo("AbcImport", q=True, l=True):

    cmds.loadPlugin("AbcImport")

if not cmds.pluginInfo("AbcExport", q=True, l=True):

    cmds.loadPlugin("AbcExport")

mel.eval('AbcExport -j "-fr 1 96 -sn -uv -ws -wv -rt root -file ~/Desktop/abcTest.abc"')

cmds.file(new=True,force=True)

mel.eval('AbcImport -ftr -m open "~/Desktop/abcTest.abc"')

cmds.play()

This has been encountered in Maya2012 in AbcExport 1.0 using Alembic 1.0.5

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