Subject: Normal Editing 2005-06-23 - By kim aldis
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There's a trick, Alain, we used to pull years ago at a place where I used to
write the modeling software, that allowed us to get nice rounded edges on
sharp corners and help prevent the normal interpolation thing on bevelled
cubes that catches so many people, often without them even realising it.
Normals are usually calculated by averaging the normals of faces
neighbouring vertices to which the normals are attached. If you can flag
faces as not contributing to this calculation then you can, to some extent,
control how shading happens in some parts of the model. For example, the
rounded edge cube which is so much of a pain; take a cube, apply a single
face bevel to it's edges, nice and small. Now, if you could flag the bevel
and corner faces as not contributing to the normal calculation, the large
flat faces would all shade as flat but the small, edge faces would have
their normals interpolated through 90 degrees across their surfaces at shade
time.
Just a thought.
> -- --Original Message-- --
> From: owner-xsi@(protected)
> [mailto:owner-xsi@(protected)] On Behalf Of Alain Laferri?re
> Sent: 23 June 2005 08:33
> To: Matthias Worch
> Cc: XSI@(protected)
> Subject: RE: Normal Editing
>
>
> Hi Matthias,
>
> Glad to be of help ! We'll definitely look at including it in
> a future release.
>
> Cheers,
> Alain
>
> -- --Original Message-- --
> From: Matthias Worch [mailto:langsuyar@(protected)]
> Sent: Thursday, June 23, 2005 2:56 PM
> To: Alain Laferri?re
> Cc: XSI@(protected)
> Subject: Re: Normal Editing
>
> Thanks, that does everything I was looking for, and better
> than the Maya equivalent I was thinking about! Let's hope you
> can make that addon part of the official distribution in the future.
>
> --
> Matthias Worch
> http://www.langsuyar.com
>
>
> AL> Hi Matthias,
>
> AL> I wrote a tool to interactively edit user normals. It does not
> AL> provide a way to average normals based on an angle but it
> allows you
> AL> to average the selected normals around the vertices of
> one mesh, or
> AL> between vertices of separate meshes based on their distance in
> AL> global space. It also has effects to set selected normals to a
> AL> polygon or vertex normal and to help manage which normals
> are stored
> AL> in the user normal cluster properties, etc.
>
> AL> You can find it on XSI Net :
> AL> - go to http://www.softimage.com/xsinet/
> AL> - enter "XSI_UserNormalEditing" in the search box and click go
>
> AL> I hope to keep improving this tool in the future, if you
> have some
> AL> suggestions you'd like to see added please feel free to
> contact me
> AL> directly with your requests.
>
> AL> Cheers,
> AL> Alain
>
> AL> -- --Original Message-- --
> AL> From: owner-xsi@(protected)
> AL> [mailto:owner-xsi@(protected)] On Behalf Of Matthias Worch
> AL> Sent: Thursday, June 23, 2005 8:59 AM
> AL> To: XSI@(protected)
> AL> Subject: Normal Editing
>
> AL> Can somebody point me towards the polygon/vertex normal
> editing tools?
> AL> Setting normals to face, averaging normals based on an angle,
> AL> rotating a normal by hand etc. I can't find any of that in the
> AL> manuals or menus.
>
> AL> --
> AL> Matthias Worch
> AL> http://www.langsuyar.com
>
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