Java3D model loader for Google SketchUp

I'm trying to implement a Java3D model loader for Collada 1.4.1 format.

There's an implementation on j3d-incubator project however it doesn't seem that is supporting many functions so that I checked out from their repository and tried implementing additional functions.

When I get some result, I'd like to submit my codes.

For the first step, I tried loading models that were made with Google SketchUp (it's using Collada format) 

As you know, there is a lot of great models on 3D Warehouse and it must be very helpful if you can load them into your java 3d application.

I made a very simple applet to try loading them.

(I sincerely ask you guys to accept my personal signature that is needed to access local files by the applet)

It hasn't been supporting a lot of functions however it is able to load geometry, basic materials (such as diffuse or ambient colours) and simple textures.

Please be careful loading a large file, it might require a huge amount of memory space.

You can also download jar binary archive.

Here's a code fragment to try it. Please refer Java3D object loader usage that you can find on several web sites. 

loader.KmzLoader l = new loader.KmzLoader();

Scene s = l.load(new URL(path));

BranchGroup bg = s.getSceneGraph();

You may also need to adjust camera location or things.

I found out if the model is too large Java3D is not able to handle z buffer orders so then you need to use Transform group to scale it smaller. 

If someone has information on this problem and solution please let me know.

Hope you can enjoy it. :)

When you find bugs or have any requirements, I'd be grateful if you leave messages here.

Compiling Collada 1.5 schema by JAXB

I had a problem compiling Collada 1.5 schema by JAXB so I write problems and the way I solved it.

What you need to prepare is

1. Download Collada 1.5.0 Schema (if the extension is "txt", the change it to "xsd")
2. Download latest JAXB (currently 2.1.9 is the latest)
3. Open and place them as you need. (also set a path for Java and others)

First, I tried the command "xjc collada_schema_1_5.xsd" and got the following errors.

[ERROR] Property "Source" is already defined. Use <jaxb:property> to resolve this conflict. line 8785 of file:/Users/shiva/TMP/collada/collada_schema_1_5.xsd ...

This problem is occurred by name collision it seemed and I found a solution here

"simpleMode.xml" helped to avoid the first problem. (and it worked well for collada 1.4 schema)

The Command was 

"xjc collada_schema_1_5.xsd -extension simpleMode.xml"

(make sure the path to "simpleMode.xml")

When I tried it, "xjc" died of OutOfMemory error however I could not find a way to enlarge memory space for "xjc" command.

So that I needed to call "xjc" from "java" command as follows.

"java -Xmx1024m -jar jaxb-xjc.jar collada_schema_1_5.xsd -extension simpleMode.xsd"

This worked enough and I could get java classes for the schema.