Distorted Android

package org.distortedandroid.examples.quaternion;

import java.io.IOException;

import java.io.InputStream;

import java.util.Random;

import javax.microedition.khronos.egl.EGLConfig;

import javax.microedition.khronos.opengles.GL10;

import org.distortedandroid.examples.R;

import org.distortedandroid.library.Interpolator;

import org.distortedandroid.library.InterpolatorQuat;

import org.distortedandroid.library.DistortedCubes;

import org.distortedandroid.library.Float4D;

import org.distortedandroid.library.Float3D;

import org.distortedandroid.library.Distorted;

import android.graphics.Bitmap;

import android.graphics.BitmapFactory;

import android.opengl.GLES20;

import android.opengl.GLSurfaceView;

///////////////////////////////////////////////////////////////////////////////////////////////////

class QuaternionRenderer implements GLSurfaceView.Renderer 

{

	private static final int NUM_QUATERNIONS = 5;

	private static final int SIZE = 100;

    private GLSurfaceView mView;

    private DistortedCubes mCube;

    private Random mRnd = new Random(System.currentTimeMillis());

    private InterpolatorQuat mRot;

///////////////////////////////////////////////////////////////////////////////////////////////////

    public QuaternionRenderer(GLSurfaceView v) 

      {

      mView = v;

      mCube = new DistortedCubes( 3, "000010000", SIZE);

      mRot = new InterpolatorQuat();

      float x,y,z,w, len;

      for(int i=0; i<NUM_QUATERNIONS; i++)

        {

        x = 2*mRnd.nextFloat()-1;  

        y = 2*mRnd.nextFloat()-1;  

        z = 2*mRnd.nextFloat()-1;  

        w = 2*mRnd.nextFloat()-1;  

        len = (float)Math.sqrt( x*x+y*y+z*z+w*w );

        mRot.add(new Float4D(x/len,y/len,z/len,w/len));

        }

      mRot.setCount(0);

      mRot.setDuration(8000);

      mRot.setMode(Interpolator.MODE_LOOP);

      }

///////////////////////////////////////////////////////////////////////////////////////////////////

    public void onDrawFrame(GL10 glUnused) 

      {

      GLES20.glClearColor(0.0f, 0.0f, 0.0f, 1.0f);

      GLES20.glClear( GLES20.GL_DEPTH_BUFFER_BIT | GLES20.GL_COLOR_BUFFER_BIT);

      mCube.draw(System.currentTimeMillis());

      }

///////////////////////////////////////////////////////////////////////////////////////////////////

    public void onSurfaceChanged(GL10 glUnused, int width, int height) 

      {

      mCube.abortAllEffects(Distorted.TYPE_MATR);  

      if( width > height )

        {

        mCube.move((width-height)/2 ,0, 0);

        mCube.scale(height/(3.0f*SIZE));

        }  

      else

        {   

        mCube.move(0 ,(height-width)/2, 0);

        mCube.scale(width/(3.0f*SIZE));

        }

      mCube.quaternion( new Float3D(3*SIZE/2,3*SIZE/2,0), mRot);

      Distorted.onSurfaceChanged(width, height); 

      }

///////////////////////////////////////////////////////////////////////////////////////////////////

    public void onSurfaceCreated(GL10 glUnused, EGLConfig config) 

      {

      InputStream is = mView.getContext().getResources().openRawResource(R.raw.grid);

      Bitmap bitmap;

      try 

        {

        bitmap = BitmapFactory.decodeStream(is);

        } 

      finally 

        {

        try 

          {

          is.close();

          } 

        catch(IOException e) { }

        }  

      mCube.setBitmap(bitmap);

      try

        {

        Distorted.onSurfaceCreated(mView);

        }

      catch(Exception ex)

        {

        android.util.Log.e("Quaternion", ex.getMessage() );

        }

      }

}