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

[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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>
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