Preventing "Triangles" when making models

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DOT
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Preventing "Triangles" when making models

Post by DOT » Tue Sep 22, 2009 10:45 am

So i have that problem that haunts me for a quite a while,

when i am making models in Wings3D and exporting it to a 3ds one and loading up Upspring and loading that Model,
it creates "Triangles" my original Model in Wings format doesn't got any Triangles added to it,
same thing happens on 3dobuilder as well

Pic: http://img5.imagebanana.com/view/qvk3e2 ... angles.JPG

Left: Wings 3D
Right: UpSpring loading up TDED25.3ds

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Balthazar
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Re: Preventing "Triangles" when making models

Post by Balthazar » Tue Sep 22, 2009 1:11 pm

That`s because 3D models in Spring, TA3D and TA can be constructed only from polygons with 3 sides (triangles). You can convert quad polygons to triangles in Wings3D before export, but anyway, your 3D model can be constructed only from triangles.

DOT
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Re: Preventing "Triangles" when making models

Post by DOT » Tue Sep 22, 2009 1:54 pm

Balthazar wrote:That`s because 3D models in Spring, TA3D and TA can be constructed only from polygons with 3 sides (triangles). You can convert quad polygons to triangles in Wings3D before export, but anyway, your 3D model can be constructed only from triangles.
this makes no sense i have seen other 3do models that got no Triangles how come?

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zuzuf
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Re: Preventing "Triangles" when making models

Post by zuzuf » Tue Sep 22, 2009 3:15 pm

generic polygons are not easy to handle properly, and they are always tesselated before being rendered. Video harware only understand triangles. Also you have geometrical inconsistencies with more than 3 points in space since because of rounding errors you'll define volumes instead of real polygons, so there is an ambiguity problem.
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DOT
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Re: Preventing "Triangles" when making models

Post by DOT » Wed Sep 23, 2009 11:01 am

Yes but..
http://img5.imagebanana.com/view/lt095i ... iangle.JPG

This is an custom Model from Command&Conquer modification for Original Total Annihilation
and it doesn't got any triangles as you can see from the Picture

how do i achieve this?

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Re: Preventing "Triangles" when making models

Post by zuzuf » Thu Sep 24, 2009 3:51 pm

Probably importing the data from a file format that supports generic polygons in a software that supports some kind of generic polygons from that specific file format ...
Why do you really need generic polygons ? (It's probably possible to do it with triangles even if it's less convenient)
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Re: Preventing "Triangles" when making models

Post by DOT » Thu Sep 24, 2009 5:26 pm

Because at the moment i suck at UV Mapping and so i need to stick to 3do because i can make the unit quickly textured with acceptable result,
and the Triangles makes it look more uglier and it causes "bad lightning" like one of the triangles is brighter then the others one etcetera..

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Re: Preventing "Triangles" when making models

Post by zuzuf » Thu Sep 24, 2009 5:32 pm

if you're looking for a flat lighting model, 3DMEditor can do it, just select an object and uncheck the gouraud option, if needed you can also separate triangles that share some vertices in order to avoid lighting errors thus making triangles of a same polygon appear all the same.
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Re: Preventing "Triangles" when making models

Post by DOT » Thu Sep 24, 2009 8:52 pm

Hmm.. it seems 3ds export creates triangles on it.. but not OBJ ,
but because OBJ can have only a single objects and not several.. it is a pain in the ass to do that,
oh well maybe i need to get used with it..

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Re: Preventing "Triangles" when making models

Post by Balthazar » Fri Sep 25, 2009 6:22 am

Yeah, try to get used to it, since most of the 3D editors operate with triangles.

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