next »

[Marvin Fröhlich]

Static models are loaded okay, as long as they're "triangles", not "polygons".

Can you recognize, if they are quads? In this case you could do a quick on-the-fly triangulization in the loader.

Marvin

['n ddrylliog]

Static models are loaded okay, as long as they're "triangles", not "polygons".

Can you recognize, if they are quads? In this case you could do a quick on-the-fly triangulization in the loader.

Hehe The only way to recognize that would be to check that all the polys have 4 points.

[Marvin Fröhlich]

Hehe The only way to recognize that would be to check that all the polys have 4 points.

Well, you know, how the COLLADA files are structured (I don't). IIRC in the OBJ files there are header information about the vertex count for each polygon. I just thought, the COLLADA files might contain such information, too.

Marvin

[BrazilianBoy]

Is there a way to encrypt resources(tex,models,etc) in some way?

What are the URL's to the repositories of xpal, joode, hial, and collada?

[Marvin Fröhlich]

Is there a way to encrypt resources(tex,models,etc) in some way?

Nothing integrated. Do you need this for serialization?

What are the URL's to the repositories of xpal, joode, hial, and collada?

Please have a look at http://xith.org/. In the right sidebar there are all links to dependencies. Well, there's not link for COLLADA (and it is not a link for this sidebar). Please wait for Amos for that link or use google .

Marvin

[BrazilianBoy]

Do you need this for serialization?

I used to encrypt all the resources of my 2D games.

[Marvin Fröhlich]

I guess, you could simply use some kind of decryption input stream and use this to load the models. Principally this also works for textures, but I'm not sure, if stream loading is for public use (except for creating new TextureStreamLoaders for all of your image formats. But, if you need it, I can see, how easily it is possible to make it public.

Marvin

[BrazilianBoy]

When I do it with models, the TextureLoader can't find the model's textures.

[Marvin Fröhlich]

When I do it with models, the TextureLoader can't find the model's textures.

Set the BaseURL of the model loader:

Code:

Loader loader = new BlahLoader();
loader.setBaseURL( ... );
Model model = loader.loadMode( ... );

Marvin

['n ddrylliog]

Hehe The only way to recognize that would be to check that all the polys have 4 points.

Well, you know, how the COLLADA files are structured (I don't). IIRC in the OBJ files there are header information about the vertex count for each polygon. I just thought, the COLLADA files might contain such information, too.

Yep, example with the "polylist" element :

Code:

<mesh>
  <source id="position" />
  <source id="normal" />
  <vertices id="verts">
    <input semantic="POSITION" source="#position"/>
  </vertices>
  <polylist count="3" material="#Bricks">
    <input semantic="VERTEX" source="#verts" offset="0" />
    <input semantic="NORMAL" source="#normal" offset="1" />
    <vcount>4 4 3</vcount>
    <p>0 0 2 1 3 2 1 3 4 4 6 5 7 6 5 7 8 8 10 9 9 10</p>
  </polylist>
</mesh>

Here we should just check that vcount contains only the number 4.

With the "polygons" element, however, it's a bit more complicated :

Code:

<mesh>
  <source id="position" />
  <source id="normal" />
  <vertices id="verts">
    <input semantic="POSITION" source="#position"/>
  </vertices>
  <polygons count="1" material="#Bricks">
    <input semantic="VERTEX" source="#verts" offset="0"/>
    <input semantic="NORMAL" source="#normal" offset="1"/>
    <p>0 0 2 1 3 2 1 3</p>
  </polygons>
</mesh>

Here we have to divide the number of values in each "p" element (which corresponds to one polygon) by the biggest offset + 1. Example here we have 8 values in a single "p" element. The biggest offset is 1. 8 / 2 = 4. So yes sir, it's a quad.

Is there a way to encrypt resources(tex,models,etc) in some way?

It would be a pleasure to integrate some encryption/decryption in Xith3D itself. Which algorithm were you using with your 2D games ? We could add it easily, I think.

What are the URL's to the repositories of xpal, joode, hial, and collada?

XPAL has parts both in Xith3D (abstract part) and JOODE (concrete part).
COLLADA Loader has code both in Jagatoo (abstract part) and Xith3D (concrete part). The code provided by the COLLADA designers is of no use to us, because it's a C++ API, and we're Java devs. I had to build a Java API from the COLLADA spec with JiBX.
URL for JOODE : https://joode.svn.sourceforge.net/svnroot/joode joode
URL for HIAL : https://hial.svn.sourceforge.net/svnroot/hial hial
URL for JaGaToo : https://jagatoo.svn.sourceforge.net/svnroot/jagatoo jagatoo

Note that jagatoo and hial have built jars in the Xith3D repository, in the "third-party" directory.

[BrazilianBoy]

Is it possible to render-to-texture using xith?
I'd like to implement motion blur using a render pass.

['n ddrylliog]

Is it possible to render-to-texture using xith?
I'd like to implement motion blur using a render pass.

Look here : http://xith.org/forum/index.php/topic,555.0.html

Is the remaining of your game working ?  Okay, I shut up..

[Marvin Fröhlich]

Here we should just check that vcount contains only the number 4.

The don't have to be all 4. They just have to be 3 or 4 to either take it as is ot do an on-the-fly-triangulation of each single quad.

Marvin

['n ddrylliog]

Here we should just check that vcount contains only the number 4.

The don't have to be all 4. They just have to be 3 or 4 to either take it as is ot do an on-the-fly-triangulation of each single quad.

Yep, but I'd like to implement that in a generic way. Don't we have a triangulator class somewhere ? (I remember we were talking about that).

[Marvin Fröhlich]

Yep, but I'd like to implement that in a generic way. Don't we have a triangulator class somewhere ? (I remember we were talking about that).

Well, we talked about it. But nobody (including myself) has written one or ported. We weren't sure, if we could simply port the one from Java3D because of license issues. And a really generic triangulator is a quite complicated thing and highly expensive.

Triangulating quads is very cheap and can be done on the fly. I would suggest to do on_the-fly triangulation for quads and use the future-triangulator for more complicated geoms.

Marvin