Re: [Flightgear-devel] Blender question?

[Curtis O. <cur...@gm...>]

Hi Chris,

I turned on normals and they are all pointing outwards on both halves of my
model.  It looks good in blender, but when I export it to 3ds and open it up
in osgviewer, the mirrored half is still inside out.

Curt.


On Thu, Feb 10, 2011 at 3:45 PM, Chris Wilkinson wrote:

> Hey Curt,
>
> This is the process I use in Blender 2.49 - its slightly different but
> similar for Blender 2.5x
>
> Use face select mode, select the faces you need to flip, and in 'mesh
> tools' click 'flip normals', then re-save your model - that *should* do the
> trick.
>
> Another useful trick is to click 'show normals' - you'll then see a small
> blue line extending from the centre of each face in the positive direction -
> if the normals point inward then they need to be flipped. The normal size
> can be changed if they are too hard to see.
>
> Regards,
>
> Chris Wilkinson, YBBN/BNE.
>
> ------------------------------
> *From:* Curtis Olson <cur...@gm...>
> *To:* FlightGear developers discussions <
> fli...@li...>
> *Sent:* Fri, 11 February, 2011 7:24:32 AM
> *Subject:* [Flightgear-devel] Blender question?
>
> I have a hopefully quick question.  I've generated a 3d model mesh in ac3d
> format.  I'm doing this from a perl script and I posted some pictures and
> details of the actual model here:
> http://www.flightgear.org/blogs/curt/uas/misc/3d-modelling-with-perl/
>
> My script just generates the left half of the model.  I assumed I could
> just import this into blender, duplicate the half and mirror it and produce
> the whole model.  I'm new to blender, but I managed to duplicate the side
> and mirror it and the mesh looks perfect.
>
> My problem is that when I export the full model, the mirrored half is black
> from the outside.  When I look inside of it, it's shaded properly.  It
> appears that when I mirrored the surface, the face ordering didn't change so
> the mirrored half is inside out.  I've been trying every possible
> face/normal/edge option I can find in blender and haven't been able to
> figure out how to get my faces back the right way.  The original half of
> course looks just fine.
>
> It's probably something super simple, but I've googled and haven't found
> the right set of keywords I guess.  Is there an easy way to get all my faces
> the right way so both sides of my model are right side out and look correct?
>
> Thanks,
>
> Curt.
> --
> Curtis Olson:
> http://www.atiak.com - http://aem.umn.edu/~uav/
> http://www.flightgear.org - http://www.flightgear.org/blogs/category/curt/<http://www.flightgear.org/blogs/category/personal/curt/>
>
>
>
>
>
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-- 
Curtis Olson:
http://www.atiak.com - http://aem.umn.edu/~uav/
http://www.flightgear.org -
http://www.flightgear.org/blogs/category/curt/<http://www.flightgear.org/blogs/category/personal/curt/>