[Bf-committers] what to do with roll for bones?

[Campbell Barton]

Just disable the connect flag for each bone (co) button in the bone options
then you can translate all bones.

P. Visser wrote:
> Ok thanks.
>
> I encountered a different problem:
>
> In Collada you have joints instead of bones. So in Collada It is also
> possible to translate a joint over time in Collada.
>
> In Blender this is not possible, because in pose mode, you cannot translate
> the head and tail of a bone. You can only scale this bone, but that has not
> the desired effect...
>
> Any ideas?
>
>   
>> -----Oorspronkelijk bericht-----
>> Van: bf-committers-bounces at projects.blender.org [mailto:bf-committers-
>> bounces at projects.blender.org] Namens Ton Roosendaal
>> Verzonden: zaterdag 26 augustus 2006 15:04
>> Aan: bf-blender developers
>> Onderwerp: Re: [Bf-committers] what to do with roll for bones?
>>
>> Hi,
>>
>> This roll is needed to be able to define the full rotation, since it is
>> based on a vector (direction).
>>
>> Check the diagram here:
>> http://www.blender.org/cms/How_Armatures_work.634.0.html
>>
>> In Armature EditMode everything is handled non-hierarchical, so when
>> you change a roll the children won't be affected. That's useful for a
>> precise editing of the rest position.
>>
>> For im/exporting of data, it is not very useful to use Armature
>> EditMode as a reference, the conversion from /to this mode is very
>> nasty.
>>
>> -Ton-
>>
>>
>> On 25 Aug, 2006, at 23:45, P. Visser wrote:
>>
>>     
>>> Hi,
>>>
>>> When I try to import an armature into Blender (from Collada) I get the
>>> local-to-world transformations for each Joint.
>>>
>>> Now, I can easily get the world-locations for the head and tail for
>>> each
>>> bone. However, I don't understand what the purpose of the roll
>>> property is.
>>> I see that when I change this value in Blender, The local Axis of that
>>> Bone
>>> changes but as far as I can see, it has no impact on the childs of
>>> that bone
>>> whatsoever.
>>>
>>> - Pieter
>>>
>>> _______________________________________________
>>> Bf-committers mailing list
>>> Bf-committers at projects.blender.org
>>> http://projects.blender.org/mailman/listinfo/bf-committers
>>>
>>>
>>>
>>>       
>> ------------------------------------------------------------------------
>> --
>> Ton Roosendaal  Blender Foundation ton at blender.org
>> http://www.blender.org
>>
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>>     
>
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>   


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Campbell J Barton

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