OBJ export broken for 3dm files made in old MoI versions.

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 From:  chrismiller
1169.1 
First off, fantastic work with Moment of Inspiration, I honestly can't wait to buy it :)

There is a recent problem that's making me pull my hair out.
Exporting 3dm files made with older MoI betas in the November 18th version to OBJ seems to break the mesh for texturing somehow. This is how the same texture looks applied to an OBJ file exported in the September beta, vs the November beta in zbrush.

http://www.balseraph.org/obj_export_broken.jpg

New 3dm files made in MoI seem to work fine, but I really don't want to remake everything I've done. Is there a way to run older versions of the software with a command line switch or something?

Thanks!
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 From:  Michael Gibson
1169.2 In reply to 1169.1 
Hi Chris, thanks for reporting this issue.

This must be a problem introduced with the new style of triangulation in the last beta, which breaks n-gons into triangles using a radial type style in order to avoid long skinny triangles.

That's the only thing that has changed in that area in the newer beta version.

You can disable this new style of triangulation by a setting in the moi.ini file.

To do this, close down MoI first, and then open up the moi.ini file in notepad. You can find it here:
C:\Documents and Settings\Michael\Application Data\Moi\moi.ini

Under the [Mesh Export] section, find the entry that says:
CentroidTriangulation=y
and change it to
CentroidTriangulation=n

This should cause the Nov 18th beta to handle meshing in the same way as the previous Sept beta. Can you please let me know if this solves your problem?

I will take a closer look at the newer style triangulation to look for messed up UVs.

- Michael
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 From:  Michael Gibson
1169.3 In reply to 1169.1 
Hi Chris, the new style triangulation does have a bug in UV coordinate generation, I will put up a patch (a new .dll file) for this shortly, so that you can have the better triangulation with proper UVs.

- Michael
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 From:  chrismiller
1169.4 In reply to 1169.3 
wow! thanks for the very prompt response :) I really appreciate it!
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 From:  chrismiller
1169.5 In reply to 1169.2 
Changing the ini file according to your instructions fixed the problem! Thank you very much! As I said before, it was only a problem when exporting older files made in old betas. Exporting new 3dm files does not create this problem, thank you again!
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 From:  Michael Gibson
1169.6 In reply to 1169.5 
Hi Chris, I have posted a patch for this problem here: http://moi3d.com/beta/Nov18_patch1.zip

To install the patch, unzip it and copy the new moi_lib.dll file over top of your old version in
C:\Program Files\MoI beta Nov-18-2007\

With this in place, you should be able to switch the .ini file back to:
CentroidTriangulation=y

So that you get the better triangulation with skinny triangle reduction, but with proper UVs.

Since you have a good sample model that reproduced the problem, could you please give the patch a test with the .ini file back to its original value to make sure that the bug is solved?

Thanks!

- Michael
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 From:  Frenchy Pilou (PILOU)
1169.7 In reply to 1169.6 
the patch is just change the possibility
CentroidTriangulation=y
or it makes other things?
---
Pilou
Is beautiful that please without concept!
My Gallery
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 From:  Michael Gibson
1169.8 In reply to 1169.7 
Hi Pilou, this patch only fixes the triangulation bug that was creating improper UV coordinates in certain circumstances, nothing else.

I still have a few other things that I want to add before V1 final, so there should be another patch or another beta (not sure which) before the final launch.

- Michael
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