How can I serialize a mesh?

[EgonOlsen]

It's a jar...exactly like the one that is included in the jPCT-AE zip. You create a plain Java project in Eclipse, add the jpct.jar to the build path, create a new class with a main-method, load your model in the mani-method, call build() on it and use the DeSerializer to write it back to disk. You might want to zip the resulting file afterwards and load it via a ZipInputStream in your Android App.

[nico_r_a]

sorry but i don't arrive to realize. Because i am not a good person with eclipse.
so i do " create java project", and i after i have a library "jre system library" and a folder "src".
after i create a class, but what is the "mainmethod"??
could you give more detail to realisation ?
thank you very much

[EgonOlsen]

Are you serious? You are programming in Java and have no clue about the main-method  I strongly suggest to do a basic "programming in Java"-tutorial before continuing with anything else...

[nico_r_a]

ok, it s great i have create a file ser, thanks for the advice java tutorial
but in my project android i write this it's all??
scene = Loader.loadSerializedObject(res.openRawResource(R.raw.serscene));

i don't write this??
   private Object loadModel(InputStream filename, InputStream mtl, float scale) {
         Object3D[] model = Loader.load3DS(filename, scale);

because when i load the ser in the android with "the scene = loader.loadserial......."
In the logcat i have this
"08-04 08:57:05.143: INFO/jPCT-AE(454): [ 1312448225150 ] - ERROR: Unsupported version: 2
08-04 08:57:05.174: INFO/jPCT-AE(454): [ 1312448225175 ] - ERROR: Can't deserialize object: [ 1312448225150 ] - ERROR: Unsupported version: 2"

[EgonOlsen]

Your jPCT-AE seems to be outdated. Try 1.23 or the latest alpha of 1.24 instead.

[nico_r_a]

but i have a problem same with the new version
what sould i write ?

if i write only this and i place the ser in the rawx it s good??

private Object loadModel(InputStream filename, InputStream mtl, float scale) {
//Object3D[] model = Loader.load3DS(filename, scale);
scene = Loader.loadSerializedObject(getResources().openRawResource(R.raw.serscene));
// Object3D[] model = Loader.loadOBJ(filename, mtl, scale);

[EgonOlsen]

If you are using the example projects directly, update the jpct-ae.jar in their lib-directory with the one from the lib-directory that is located directly in the zip. IIRC, i forgot to update those jars in the 1.23 release.

[nico_r_a]

yes it's done , i have uploaded the library with the new version alpha. but i have still the same problem

[EgonOlsen]

Then you did something wrong. The versions since 1.23 support file format version 2. You must be using an old lib. You can check the version number in Config.

[nico_r_a]

but some texture are large 1024*1024, there are not problem with this dimension?

scene = Loader.load3DS("C:/workspace/file4/res/raw/scene.3ds", 300)[0];

the "300" and the "0" mean what???
thanks

[EgonOlsen]

Please...read the docs. It's not my mission to explain everything that i already did in the docs. About the texture size: 1024*1024 is too large for a mobile device. It will work, but it consumes too much memory. 1024*1024*4=4mb per texture plus the uploaded version to the gpu -> 8mb plus mip maps -> ~12mb...

[nico_r_a]

i have send a message
but i have another problem when i load my 3ds file without used the serialization, the application is not load in the emulator and in my logcat
i have this
"
08-05 08:20:55.532: INFO/jPCT-AE(426): Object 'Car2_jPCT40' created using 204 polygons and 104 vertices.
08-05 08:20:55.532: INFO/jPCT-AE(426): Processing object from 3DS-file: Car2
08-05 08:20:55.572: INFO/jPCT-AE(426): Object 'Car1_jPCT41' created using 204 polygons and 104 vertices.
08-05 08:20:55.585: INFO/jPCT-AE(426): [ 1312532455586 ] - ERROR: Can't merge null!
08-05 08:20:55.612: WARN/dalvikvm(426): threadid=9: thread exiting with uncaught exception (group=0x40014760)
08-05 08:20:55.612: ERROR/AndroidRuntime(426): FATAL EXCEPTION: GLThread 10
08-05 08:20:55.612: ERROR/AndroidRuntime(426): java.lang.RuntimeException: [ 1312532455586 ] - ERROR: Can't merge null!
08-05 08:20:55.612: ERROR/AndroidRuntime(426):     at com.threed.jpct.Logger.log(Logger.java:189)
08-05 08:20:55.612: ERROR/AndroidRuntime(426):     at com.threed.jpct.Object3D.mergeObjects(Object3D.java:476)
08-05 08:20:55.612: ERROR/AndroidRuntime(426):     at com.mm.file4$MyRenderer.loadModel(Ovip.java:499)
08-05 08:20:55.612: ERROR/AndroidRuntime(426):     at com.mm.file4$MyRenderer.onSurfaceChanged(Ovip.java:228)
08-05 08:20:55.612: ERROR/AndroidRuntime(426):     at android.opengl.GLSurfaceView$GLThread.guardedRun(GLSurfaceView.java:1422)
08-05 08:20:55.612: ERROR/AndroidRuntime(426):     at android.opengl.GLSurfaceView$GLThread.run(GLSurfaceView.java:1184)
"

[EgonOlsen]

ERROR: Can't merge null!

...just don't merge null.

[nico_r_a]

ok, i have resolved the problem with the merge.
but my scene is still blue (like the sky), this is the light??
"
if (master == null) {

            world = new World();
            world.setAmbientLight(250, 250, 250);

            sun = new Light(world);
            sun.setIntensity(20, 20, 20);
            

[nico_r_a]

i have loaded to try your file hose_poser.obj (convert in 3ds), and i see only the "hip:2 hip" in the emulator android. (the hip:2 hip is white and the rest is blue)
why? i write this in the application java to create the ser

Code Select Expand


import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import com.threed.jpct.DeSerializer;
import com.threed.jpct.Loader;
import com.threed.jpct.Object3D;
import com.threed.jpct.Texture;
import com.threed.jpct.TextureManager;
//import java.awt.Color;

public class Main {


    public static void main(String[ ] args)  throws FileNotFoundException {
        Object3D hose_poser = null;
 
        DeSerializer de;
       hose_poser = Loader.load3DS("C:/workspace/file/res/raw/hose_poser3ds",20)[0];
       hose_poser.build();
        de = new DeSerializer();
        de.serialize(hose_poser, new FileOutputStream("C:/workspace/file/res/raw/serhose_poser.ser"), true);
               
    }
}



May be it 's in my application android??
should i write in my code android something in rapport with the loading of all the object in ser, because i have writen only this

Hoseposer = Loader.loadSerializedObject(getResources().openRawResource(R.raw.serhose_poser));