[android-developers] Transfering VBO's between a loader and renderer.

I've been trying to rely on forums less, but yet here I am to pester you. Problem this time I've had for about a week. I've been experimenting with a variety of different codes and having no change in success. The title says it all.

I abandoned my previous project as I discovered someone else had a very similiar idea, and had much more done. So starting from scratch again.

First I would like to point out that it's far from done. I don't even know where I should create the VBO's, yet alone draw them. So here you go.

My loading screen activity:

package com.braindrool.game;

import java.io.IOException;

import java.io.InputStream;

import java.nio.BufferOverflowException;

import java.nio.ByteBuffer;

import java.nio.ByteOrder;

import java.nio.FloatBuffer;

import java.nio.ReadOnlyBufferException;

import java.nio.ShortBuffer;

import java.util.ArrayList;

import java.util.List;

import java.util.StringTokenizer;

import android.app.Activity;

import android.content.res.AssetManager;

import android.os.Bundle;

import android.view.Window;

import android.view.WindowManager;

public class LoadingScreen extends Activity {

FloatBuffer vertexBuffer;

ShortBuffer indexBuffer;

List<Float> vertices = new ArrayList<Float>();

List<Short> indices = new ArrayList<Short>();

@Override

protected void onCreate(Bundle savedInstanceState) {

requestWindowFeature(Window.FEATURE_NO_TITLE);

getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,

WindowManager.LayoutParams.FLAG_FULLSCREEN);

super.onCreate(savedInstanceState);

initializeModels();

setContentView(R.layout.loading_screen);

}

@Override

protected void onPause() {

// TODO Auto-generated method stub

super.onPause();

}

private void initializeModels() {

ByteBuffer vbb = ByteBuffer.allocateDirect(vertices.size() * 4);

vbb.order(ByteOrder.nativeOrder());

ByteBuffer ibb = ByteBuffer.allocateDirect(indices.size() * 2);

ibb.order(ByteOrder.nativeOrder());

ibb.position(0);

AssetManager am = getAssets();

try {

String[] files = am.list("models");

System.out.println(files);

for (int i = 0; i < files.length; i++) {

loadModel("models/" + files[i]);

}

float[] floatArray = new float[vertices.size()];

for (int i = 0; i < vertices.size(); i++) {

Float f = vertices.get(i);

floatArray[i] = (f != null ? f : Float.NaN);

}

System.out.println(vertices);

System.out.println(indices);

vbb.position(0);

} catch (IOException e) {

e.printStackTrace();

} catch (BufferOverflowException e) {

e.printStackTrace();

} catch (ReadOnlyBufferException e) {

e.printStackTrace();

} catch (IndexOutOfBoundsException e) {

e.printStackTrace();

}

}

private void loadModel(String modelName) {

AssetManager am = getAssets();

System.out.println("Loading " + modelName);

try {

InputStream input = am.open(modelName);

int size = input.available();

byte[] buffer = new byte[size];

input.read(buffer);

input.close();

String[] text = new String(buffer).split("¶");

for (int i = 0; i < text.length; i++) {

StringTokenizer vt = new StringTokenizer(text[i]);

StringTokenizer it = new StringTokenizer(text[i]);

while (vt.hasMoreTokens()) {

if (vt.nextToken().endsWith("v")) {

vertices.add(Float.parseFloat(vt.nextToken()));

vertices.add(Float.parseFloat(vt.nextToken()));

vertices.add(Float.parseFloat(vt.nextToken()));

}

}

while (it.hasMoreTokens()) {

if (it.nextToken().endsWith("f")) {

indices.add(Short.parseShort(it.nextToken()));

indices.add(Short.parseShort(it.nextToken()));

indices.add(Short.parseShort(it.nextToken()));

}

}

}

}

catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

}

To summarize that, it loads in all models and adds them to an array successfully. Problem is not there. How would I go about actually creating the VBO's and implementing them into an OpenGL ES  1 renderer? 

Help greatly appreciated!

~Braindrool

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