Model loading and instancing and loading times of 3ds

Troubleshooting General Help
1

Most probably I am not understanding something right.



Let's assume I've just loaded a model from a 3ds file and have a Node:



public Node loadModelX3D(String model)

{

    try

    {

      X3dToJme converter = new X3dToJme();

      URL objFile=TestX3DLoading.class.getClassLoader().getResource(model);

      ByteArrayOutputStream BO=new ByteArrayOutputStream();

      converter.convert(objFile.openStream(),BO);

      Node r=(Node)BinaryImporter.getInstance().load(new ByteArrayInputStream(BO.toByteArray()));

      return r;

    }

    catch (Exception e)

    {

    e.printStackTrace();

    }

    return null;

}



Now, I can attach this Node to the scenegraph all right. But what if I want a second ojbect shown in the scenegraph with the exact same model? Do I really have to load it again? Or is there some way of attaching the same node to the scenegraph twice but such that I can still have them at different locaitons? Or is there some way to duplicate a Node (there is no clone method in Node).



Another issue I have is that loading time is extraordinary long. For a simple box with 36 vertices is takes 850ms. Why is that? What happens if I start loading much larger models?

2

Try using SharedNodes, see the jmetest package for an example.

Cheers,

Normen

3
normen said:

Try using SharedNodes, see the jmetest package for an example.
Cheers,
Normen


Thanks, will try.

Tracked the long loading time to the native java DocumentBuilder in X3dToJme.java. This line:

doc = documentBuilder.parse(x3dIn);

Switched to 3ds instead and works like a charm. I don't get why this line takes so long though, since the x3d file was only 3KB. Strange.