[Bf-python] Re: Mesh modes

[Ken Hughes]

Campbell Barton wrote:
> Ken some problems setting mesh mode- have had the same problem
> http://www.elysiun.com/forum/viewtopic.php?t=58639 -
> 
> I have the same problem on a simple mesh with 2.4.1
> 
> mesh.mode = tempMe.mode
> ValueError: invalid bit(s) set in mask
> 
> According to DNA_mesh_types.h
> ME_TWOSIDED = 4
> ME_AUTOSMOOTH = 32
> ME_NOPUNOFLIP = 2
> 
> What is currently in the tempMe.mode is off by one. I set each mode one 
> by one in the ui and did the export with a print of the tmpMe.mode to 
> see them.
> 
> If you change the code mesh.mode = tempMe.mode to mesh.mode = 
> tempMe.mode - 1 it works.
> 
> Any ideas on why it's off by one?

It's not off by one, it's off by a ton.  There are many other bits missing:

/* me->flag */
#define ME_ISDONE		1
#define ME_NOPUNOFLIP	2
#define ME_TWOSIDED		4
#define ME_UVEFFECT		8
#define ME_VCOLEFFECT	16
#define ME_AUTOSMOOTH	32
#define ME_SMESH		64
#define ME_SUBSURF		128
#define ME_OPT_EDGES	256

so the range-checking code in Mesh is complaining because it's not 
looking for all of them.

Ken