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

[Ton Roosendaal]

Hi all,

Currently 2.48 and older will still read 2.5+ files, but without the UI 
(obviously). That was still sort-of acceptable.

Now with new animation system, all of the motion data will get lost if 
you read 2.50 .blends in older versions. And even worse, the plans for 
bmesh also include minor upgrades in Mesh data, making it unreadable in 
older versions too.

Without animations or meshes, there's not much use keeping 'forward' 
compatibility. It's even very hard to predict if you don't get crashes 
even... So, my proposal would be:

- Add in 2.49 (trunk) a warning menu + failure to read 2.5+ .blend 
files.
- Make 2.5 save the ~/.B.blend as ~/.B25.blend (this to prevent 
usability issues).

-Ton-

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