nurbs to obj
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 From:  Andrei Samardac
6040.52 In reply to 6040.51 
This is what i descoverd.
The differences.

centroid OFF - 473 Poly


centroid ON - 491 Poly
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Michael what us the main advantage of making centroid off?
It looks better with off.

EDITED: 25 Jul 2013 by ANDREI SAMARDAC

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 From:  Michael Gibson
6040.53 In reply to 6040.52 
Hi Andrei, on your example you can see the differences pretty clearly on the large planar face, notice how with centroid triangulation, the triangulation of that big n-gon takes on a radial structure with an internal point added like this:



Without centroid triangulation, it intead forms triangles by only connecting vertices on the outer n-gon boundary and not generating any extra internal central point, which gives you this instead:




On other areas the difference looks more like this:






Which one is better depends on your particular needs - when it's on it can help make some triangle structures sort of more regular and symmetrical like the big face in this example, and in some cases makes triangles that are kind of more wedge shaped and don't stretch quite as far across a space. But also because it adds an additional internal point it produces a higher polygon count and sometimes having the radial structure in small areas looks kind of strange.

For a while now I've had the default changed to have it off by default but for a long time before that it was on by default.

If you want to fully minimize polygon count you will probably want to turn it off.

If you like the radial structure of the large face shown above and don't mind some additional vertices being added then turn it on instead.

- Michael

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 From:  Andrei Samardac
6040.54 In reply to 6040.53 
Yep thank you I understand. And I like more geometry with non collapsed style)
Also today I try this and looks like circle extrusion it still collapse n-gone.


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 From:  Michael Gibson
6040.55 In reply to 6040.54 
It will still use centroid triangulation on n-gons that have all vertices at equal distances from the centroid point, so basically only totally regular polygons like the cylinder cap.

The centroid setting actually controls whether centroid triangulation is also used on other kinds of non-regular polygons where it is possible to make a valid triangulation by connecting to a centroid point.

- Michael
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 From:  Andrei Samardac
6040.56 In reply to 6040.55 
Good, it's not problem for me just noticed it.

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