[Bf-committers] Normalization of Vertexgroups?

Tobias Oelgarte tobias.oelgarte at googlemail.com
Wed Feb 23 15:57:57 CET 2011

Sorry, but i know that already. But some groups seam to be included in 
normalization progress (if created with auto normalize on) and some are 
excluded (if created with auto normalize off). But you can't see it 
later on if a group is excluded from auto normalize or not. Also you 
can't change the "normalization type" for this vertex groups. Meaning 
that auto normalize will not have an effect on them, while other groups 
are included in normalization.

Thinking straight forward, then there should be a button (option) for 
the vertex groups to be included or excluded from normalization.

One more thing i noticed is that auto normalize fails on overlapping 
left/right vertex groups (with x-mirror). The side you are painting on 
is handled fine, but the other side will get different results, as in 
your example calculation. (Guess it ignores that the mirroring will also 
switch the left/right names of the groups)

Am 23.02.2011 15:44, schrieb Xavier Thomas:
> There is also the "auto normalise" vertex group in weight paint mode
> (in the Tool side pane->  Brush tab)
> My guess and whatt would seems normal is that it only change the
> weights value but in such a  way that weights keep the same proportion
> compared to the sum of all weight (which would be one after
> normalisation).
> So if a vertex is part of 2 vertex group and have a weight of 0.5 for
> the 1rst group and 1.0 for the second. After normalisation the weights
> will be:
> 0.5/(0.5+1.0) = 0.3333 for the first group
> 1.0/(0.5+1.0) = 0.666 for the second
> After the weight have been normalised, if you paint weight using the
> "auto normalize" option, than it is like running "normalize vertex
> groups" after each stroke. So if you paint to increase the weight of
> the 1rst group than the weight of the second group will diminue.
> I hope this was understandable.
> Xavier
> 2011/2/23 Tobias Oelgarte<tobias.oelgarte at googlemail.com>:
>> As i have noticed, you have now the functionality to normalize vertex
>> groups. But it is very unclear which groups will be normalized and which
>> are not affected. At least visually you have no feedback which will be
>> taken into account and which are not. Is there a part of the UI still
>> missing? Or how can you manage that vertex groups are included in
>> normalization or not? Can this behavior changed after creation?
>> I also miss one trivial feature, to fill a vertex group with just enough
>> so that the groups are normalized. For example, you have group A and now
>> you want to paint on group B that: A.weight + B.weight = 1.0
>> Many questions. I know. But i could not find any useful documentation on
>> this and the UI itself doesn't show it.
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