[Bf-committers] 2.49: prevent reading 2.5+ ?

[Ton Roosendaal]

Hi Joe,

We of course still need a design proposal for Mesh data in files/memory.
Storing tria/quad/ngons efficiently is possible in many ways. One thing 
we should also get rid of is the 'eekadoodle' with zero indices. :)

Another thing on the changelist is to remove the Image pointer from 
Texture face, and replace with Material (or similar, or just use face 
material index).

-Ton-

------------------------------------------------------------------------
Ton Roosendaal  Blender Foundation   ton at blender.org    www.blender.org
Blender Institute BV  Entrepotdok 57A  1018AD Amsterdam The Netherlands

On 14 Apr, 2009, at 10:47, joe wrote:

> Well, I was thinking of storing the mesh tesselation in mfaces, to
> maintain compatibility with existing code and maybe scripts.  I
> suppose people could still open the meshes in an older version of
> blender, they'd just get a triangle mesh.  But you still have the UI
> issue, and animation data, and stuff like that.  There's a purpose to
> storing the tesselation in mfaces beyond compatibility; there isn't
> with storing similar copies with everything else that's changed.
>
> Joe
>
> On Mon, Apr 13, 2009 at 6:02 PM,  <blender at erwincoumans.com> wrote:
>>
>> The new mesh data and animation data is new so not "known data" 
>> obviously.
>>
>> So the choice of not keeping a copy of the old mesh data is basically 
>> giving
>> up forward compatibility. That's why I quoted Joe in my previous 
>> email.
>>
>> I hope Joe can briefly explain why it is impossible to keep a
>> copy/conversion between old and new mesh data.
>> Thanks,
>> Erwin
>>
>>
>>
>>
>> Martin Poirier writes:
>>
>>>
>>>
>>>
>>>
>>> --- On Mon, 4/13/09, José Ignacio Romero <jose.cyborg at gmail.com> 
>>> wrote:
>>>
>>>> El lun, 13-04-2009 a las 19:09 -0400,
>>>> blender at erwincoumans.com escribió:
>>>>> It hasn't happen before: old Blender versions from
>>>> 1999 can still read
>>>>> objects, meshes, camera and ipo/animation curves from
>>>> todays Blender, and
>>>>> vise versa.
>>>>>
>>>>> Obviously an older Blender version will skip the
>>>> new/unknown data, the
>>>>> concern is about known data.
>>>>>
>>>> the new mesh data and animato don't qualify as
>>>> "known data", do they?
>>>
>>> That's exactly it.
>>>
>>> Martin
>>>
>>>
>>>       
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