[Bf-committers] CVS commit: blender/source/blender/blenkernel BKE_booleanops.h blender/source/blender/src booleanops.c

[Daniel Dunbar]

Yup, this is very true, however, even if the boolean lib did 
provide normal information, there is no way for blender to keep 
that information synchronized, the next time the user edits the 
mesh all the normals will be rebuilt.

I think procedural normals are only usefull when the user does
not edit the end product (for example if we had interactive booleans
instead of just a boolean tool).

Its more of a consistency issue, keeping the mesh similar to how
it was before, than an actually usefull tool... using booleans for
something that is smooth is either a) going to require a lot of
mesh tweaking afterwards, so the normals will get rebuilt or b) just
a thing someone is doing as a quick hack, and the quality of results
is not super important.

--- Laurence Bourn <LBourn@medis.nl> wrote:
> Hiya Daniel,
> Good to see you working on the Sauces hombre!
> 
> Vertex normals on boolean mangled meshes look bad coz the polygons in the
> neighbourhood of the intersection between the objects are of poor quality
> (long thin etc). It is much better to make the boolean operation itself
> compute a new vertex normal each time it splits a face. It shouldn't be that
> hard to convince the boolean op stuff in intern to do this. Maybe I should
> do it? All that BSP code was such a bad idea for doing boolean ops much
> better to use the algorithm here:
> 
> <http://www.flipcode.com/cgi-bin/msg.cgi?showThread=13November2000-Construct
> iveSolidGeometry&forum=askmid&id=-1>
> 
> Cheers,
> Laurence.
> 
> 
> 
> 
> -----Original Message-----
> From: Daniel Dunbar [mailto:daniel@zuster.org]
> Sent: maandag 24 maart 2003 17:08
> To: bf-committers@blender.org
> Subject: [Bf-committers] CVS commit: blender/source/blender/blenkernel
> BKE_booleanops.h blender/source/blender/src booleanops.c
> 
> 
> zuster (Daniel Dunbar) 2003/03/24 17:08:16 CET
> 
>   Modified files:
>     blender/source/blender/blenkernel BKE_booleanops.h 
>     blender/source/blender/src booleanops.c 
>   
>   Log:
>   Fix for bug #72.
>   Update mesh normals after a boolean operation.
>   Also updated boolen operation to copy face flag (propagate
>   face smoothness information).
>   
>   Revision  Changes    Path
>   1.6       +2 -2      blender/source/blender/blenkernel/BKE_booleanops.h
>   1.4       +7 -6      blender/source/blender/src/booleanops.c
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=====
daniel dunbar
daniel@zuster.org