Collada model seeing the inside on the outside

[Iasonic]

Hi guys, I am having this issue.
I have a model that is like a sphere. Only cut in to two peaces.
The inside is white and the outside is like a coconut. When i load the
collada file into colladaViewer I'm seeing the inside on the outside like
there is a gap in there. See image.

Can anybody tell me how to fiks this?

Loading Image...

[Huge Ontoman]

Good evening,

i would bet on Z-SORTING (depth sorting) problem, a common problem with triangles close to each other. I wanted to paste You some links explaining it, but i haven't found any...but i know for sure that Jeff Winder does talk about it in his book. The thing behind it is that (overlapping) faces (or "triangles") are draw on screen based on their "depth" (or Z coordinate) at the face center. If You have large (parallel) triangles close to each other, they could get messed up while z-sorted (that is, defining the order of drawing them on screen)...

Hey, i found a link that deals with solving z-sort problems! Here it goes.
And one defining what it is.
You could try also the QuadrantRenderEngine...

I think that is all You need to know to get started taming that beast...

cheers,
huge.

Date: Mon, 19 Jul 2010 08:29:35 -0700
Subject: [Papervision3D] Collada model seeing the inside on the outside
Hi guys, I am having this issue.
I have a model that is like a sphere. Only cut in to two peaces.
The inside is white and the outside is like a coconut. When i load the
collada file into colladaViewer I'm seeing the inside on the outside like
there is a gap in there. See image.
Can anybody tell me how to fiks this?
http://papervision3d.758870.n4.nabble.com/file/n2294190/file2.jpg
--
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[Iáson van der Meulen]

Ok thx for the info, I will look in to this :).

kind regards Iason

Post by Huge Ontoman
Good evening,
i would bet on Z-SORTING (depth sorting) problem, a common problem with
triangles close to each other. I wanted to paste You some links explaining
it, but i haven't found any...but i know for sure that Jeff Winder does talk
about it in his book<https://www.packtpub.com/papervision3d-essentials/book?mid/310809tn2fty>.
The thing behind it is that (overlapping) faces (or "triangles") are draw on
screen based on their "depth" (or Z coordinate) at the face center. If You
have large (parallel) triangles close to each other, they could get messed
up while z-sorted (that is, defining the order of drawing them on screen)...
Hey, i found a link that deals with solving z-sort problems! Here<http://blog.yoz.sk/2010/03/fixing-z-sorting-in-papervision-3d/>it goes.
And one <http://en.wikipedia.org/wiki/Z-order> defining what it is.
You could try also the QuadrantRenderEngine<http://rockonflash.wordpress.com/2008/10/14/papervision3d-quadtree-released/>
...
I think that is all You need to know to get started taming that beast...
cheers,
huge.

Date: Mon, 19 Jul 2010 08:29:35 -0700
Subject: [Papervision3D] Collada model seeing the inside on the outside
Hi guys, I am having this issue.
I have a model that is like a sphere. Only cut in to two peaces.
The inside is white and the outside is like a coconut. When i load the
collada file into colladaViewer I'm seeing the inside on the outside like
there is a gap in there. See image.
Can anybody tell me how to fiks this?
http://papervision3d.758870.n4.nabble.com/file/n2294190/file2.jpg
--

http://papervision3d.758870.n4.nabble.com/Collada-model-seeing-the-inside-on-the-outside-tp2294190p2294190.html

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[Eralp Karaduman]

Hello,

You may try to 'recalculate normals outside' on your modeling
software, for example on Blender it's ctrl+n (in edit mode). Some
faces may be looking inside instead of outside as they must be.

Post by Iasonic
Hi guys, I am having this issue.
I have a model that is like a sphere. Only cut in to two peaces.
The inside is white and the outside is like a coconut. When i load the
collada file into colladaViewer I'm seeing the inside on the outside like
there is a gap in there. See image.
Can anybody tell me how to fiks this?
http://papervision3d.758870.n4.nabble.com/file/n2294190/file2.jpg
--
View this message in context: http://papervision3d.758870.n4.nabble.com/Collada-model-seeing-the-inside-on-the-outside-tp2294190p2294190.html
Sent from the Papervision3D mailing list archive at Nabble.com.
_______________________________________________
Papervision3D mailing list
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