[Bf-committers] Shapekey behavior while adding or removing vertices from a mesh

[Tobias Oelgarte]

Unluckily it doesn't. :-(
I added a bugreport with an simple example to the tracker.

URL: 
http://projects.blender.org/tracker/index.php?func=detail&aid=26039&group_id=9&atid=498

Greetings
Tobias Oelgarte

Am 11.02.2011 16:23, schrieb Brecht Van Lommel:
> Hi,
>
> This should all work fine, see load_editMesh for the code where it
> syncs the shape keys after exiting edit mode.
>
> Brecht.
>
> On Fri, Feb 11, 2011 at 3:06 PM, Tobias Oelgarte
> <tobias.oelgarte at googlemail.com>  wrote:
>> If new vertices will just be added/removed in the right order from all
>> shapekeys, then there should be no issue. (Same location: I would expect
>> it this way)
>>
>> But thinking about the implementation: Could it be, that the order of
>> the indices's can go wild? If the vertices get not synchronously added
>> or removed, then there could be a problem.
>>
>> I just wanted to be sure if the key-asignments don't get confussed.
>> Otherwise i would need to write a script that exports the shapekeys as a
>> file and restores them after the changes. (using vertex locations in
>> Basis-shapekey as reference)
>>
>> PS: Still didn't find the corresponding code to look at.
>> (adding/removing a vertex while using shapekeys)  ;-)
>>
>> Greetings
>> Tobias Oelgarte
>>
>> Am 11.02.2011 14:44, schrieb Brecht Van Lommel:
>>> Hi,
>>>
>>> I don't know any of current bugs with shape keys when adding/removing
>>> vertexes. However, what this may be referring to is that as you add
>>> vertices, they will all simply have the same position in all shape
>>> keys. Blender makes no attempt to cleverly set the positions of those
>>> new vertices in other shape keys based on surrounding vertices. So in
>>> practice if you're going to add shape keys to some part of the mesh,
>>> it's good to have the topology of that part locked down.
>>>
>>> Brecht.
>>>
>>> On Fri, Feb 11, 2011 at 1:22 PM, Tobias Oelgarte
>>> <tobias.oelgarte at googlemail.com>    wrote:
>>>> In many tutorials from Blender 2.4x i read that it will cause problems
>>>> if you edit a mesh* with shapekeys. (* Adding or removing vertices's)
>>>>
>>>> Is this also true for Blender 2.5x, that you might have unexpected
>>>> results after doing so? Or is this simply a myth? Currently i was
>>>> working on a mesh with shapekeys to test some features (drivers, ...)
>>>> and i could not find anything getting messed up as i removed and added
>>>> some vertices's.
>>>>
>>>> Now is my question: Was this issue fixed in the current release, never a
>>>> problem or it is still there in some cases?
>>>>
>>>> Greetings
>>>> Tobias Oelgarte
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