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Java-Gaming.org > Java Game APIs & Engines > OpenGL Development > JOGL Development > 3D Model
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Offline arkdm

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« on: 2005-06-06 14:59:57 »
Hi -

I'm a newbie when it comes to JOGL, and I was wondering if anyone knows any easy ways to import a 3D model into a JOGL app? Any ideas?

Thanks!
Casey
Offline pepijnve

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« Reply #1 on: 2005-06-07 08:31:19 »
OpenGL (and thus jogl too) is only a rendering API. How you load data and render it is application specific. There are however some model loaders available in the jogl-demos which you might be able to use. I haven't used these yet so I can't comment on how complete they are and what kind of functionality they provide.
Offline kevglass
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« Reply #2 on: 2005-06-07 08:46:36 »
If MD2 (Quake 2 models) would do, this thread might help:

http://192.18.37.44/forums/index.php?topic=7918.0

Even if not, the code contained might give you some points.

Kev
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Offline arkdm

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« Reply #3 on: 2005-06-07 11:30:49 »
Ok - I'm using blender right now for modeling, it looks like all of the blender md2 exporters have dissapeared off of the internet, but I can export to .obj. I tried using the ObjReader.java file from the jogl-demos section, which required the FloatList.java file, which errored on compile. Can someone show/tell me how to load a .obj file?

Thanks for all of your help!
Offline arkdm

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« Reply #4 on: 2005-06-07 13:29:39 »
...or would you suggest switching to Xith3d?
Offline Ken Russell

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« Reply #5 on: 2005-06-07 13:46:42 »
If you want to load 3D models of any complexity (for example, articulated or skinned models) I would recommend you use a higher-level API like Xith3D. The model readers in the jogl-demos workspace are not designed to be general-purpose loaders. What was the compilation error you got with demos.util.FloatList? It should work fine; it's distributed in all of the release builds of JOGL.
Offline arkdm

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« Reply #6 on: 2005-06-07 14:24:43 »
It doesn't like the "assert" commands. And, is Xith3D faster or slower than JOGL?

Thanks again!
Offline Ken Russell

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« Reply #7 on: 2005-06-07 17:05:34 »
You're probably trying to compile with a JDK earlier than 1.4. JOGL only works with JDK 1.4 and later.

Xith3D is built on top of either JOGL or LWJGL and it isn't reasonable to make performance comparisons between the two APIs. Xith3D does seem to be a pretty good / fast implementation of Java3D-like APIs and given the kinds of operations you're trying to do I'd recommend you look at it.
Offline arkdm

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« Reply #8 on: 2005-06-07 17:16:14 »
I'm working off of jdk 1.4.2..., and JRE 1.4.2.08. I've ran some JOGL things before.

Alright, I took your advice and installed Xith3D, but I'm having some trouble running the test program, here's my error:


C:\xith\xith3d\libs>java -cp xith3d.jar;C:\j2sdk1.4.2_07\jre\lib\ext\vecmath.jar
;.;C:\j2sdk1.4.2_07\jre\lib\ext\jogl.jar;C:\j2sdk1.4.2_07\jre\lib\ext\log4j.jar;
C:\j2sdk1.4.2_07\jre\lib\ext\junit.jar;C:\j2sdk1.4.2_07\jre\lib\ext\vorbis.jar c
om.xith3d.test.CubeTest
starting frame speed test
Exception in thread "main" java.lang.AbstractMethodError: com.xith3d.render.jogl
.OldStyleGLCapabilitiesChooser.chooseCapabilities(Lnet/java/games/jogl/GLCapabil
ities;[Lnet/java/games/jogl/GLCapabilities;)I
        at net.java.games.jogl.impl.windows.WindowsGLContext.choosePixelFormatAn
dCreateContext(WindowsGLContext.java:271)
        at net.java.games.jogl.impl.windows.WindowsOnscreenGLContext.create(Wind
owsOnscreenGLContext.java:204)
        at net.java.games.jogl.impl.windows.WindowsGLContext.makeCurrent(Windows
GLContext.java:117)
        at net.java.games.jogl.impl.windows.WindowsOnscreenGLContext.makeCurrent
(WindowsOnscreenGLContext.java:110)
        at net.java.games.jogl.impl.GLContext.invokeGL(GLContext.java:162)
        at net.java.games.jogl.GLCanvas.displayImpl(GLCanvas.java:182)
        at net.java.games.jogl.GLCanvas.display(GLCanvas.java:82)
        at com.xith3d.render.jogl.CanvasPeerImpl.render(CanvasPeerImpl.java:1136
)
        at com.xith3d.scenegraph.View.renderOnce(View.java:604)
        at com.xith3d.scenegraph.View.renderOnce(View.java:537)
        at com.xith3d.test.CubeTest.<init>(CubeTest.java:181)
        at com.xith3d.test.CubeTest.main(CubeTest.java:201)

I get an empty white screen when I try to run it, and when I go back to the command prompt I get this. Any ideas?

Thank you so much guys! All of you at this forum are helpful!
Offline Ken Russell

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« Reply #9 on: 2005-06-07 19:40:00 »
I would post this question on the Xith3D forum. It looks like your version of Xith3D is really old and you're running with a newer version of JOGL, but I know  that Xith3D has been recently updated to work with the latest JOGL.
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Offline BK

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« Reply #10 on: 2005-06-14 14:41:15 »
Hi.
As i am looking for a jogl model Loader too (especially for 3ds files), i was searching this Forum. I found a couple of topics which seem to match, but  all the links refer to the old Forum. For example:

"A 3ds loader:
http://www.java-gaming.org/cgi-bin/JGNetForums/YaBB.cgi?board=share;action=display;num=1061796369"

Although I searched some code or external links for a 3ds loader I didn't find anything here.
How can I find the topic in the new forum or can someone give me a link to a 3ds loader written for jogl?

Would be nice. Thanks in advance.
Offline wanao

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Posts: 2
« Reply #11 on: 2005-12-31 22:46:59 »
Hi, Smiley
i have been searched that for a long time, and finally i find this package "mri-v3ds" Grin
but it only decode the 3ds files, so i write a small render class.
it's simple, you can look though my code to know how to render a 3ds file.

please change file name  "mri-v3ds.txt" to "mri-v3ds.jar", because it don't allow me
to upload a .jar file. and "Model3DS.txt" it's class i write.

P.S.  it can not read textures by itself
Offline thiagosc

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Posts: 35
« Reply #12 on: 2006-01-05 15:00:04 »
Hi,

Right now I'm struggling with the loader question. Isn't anything for just fetching data from a 3ds (or any other format) file for me render as I wish?

The reason for me to hesitant about using Xith is that I'm planning to use OSGi for having a plugin system similar to what we see on Eclipse, with support of versioning and so on, and I'd divide the game into separate independent modules (bundles is the correct word).

A monolithic solution such as Xith defeats the whole purpose of modularizing it. In the end i'd be yet another layer, a frontend to Xith, that would only add overhead and make things more complicated than they need to be.
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