[MINC-users] Side-specific behaviour of subdivide_polygons

[Andrew Wood]

Hi all,

I was wondering if someone could explain if there are meaningful
differences between the following two operations:

$ subdivide_polygons   lowres_left.obj   highres_left.obj
$ transform_objects   highres_left.obj   xflip.xfm   highres_right_0.obj
vs
$ transform_objects   lowres_left.obj   xflip.xfm   lowres_right.obj
$ subdivide_polygons   lowres_right.obj   highres_right_1.obj

Flipping then subdividing yields different results from subdividing then
flipping:

$ diff -q highres_right_0.obj highres_right_1.obj
Files highres_right_0.obj and highres_right_1.obj differ

I get the impression that the set of vertices is equivalent between the two
hires surfaces, but there connectivity is somehow different.

Thanks,
Andrew