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

[joe]

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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