Distorted Android

        <activity android:name=".olimpic.OlimpicActivity" />

        <activity android:name=".inflate.InflateActivity" />

        <activity android:name=".inflate.InflateActivity2" />

        <activity android:name=".earth.EarthActivity"/>

        <activity android:name=".earth.EarthActivity2"/>

import org.distorted.examples.inflate.InflateActivity;

import org.distorted.examples.earth.EarthActivity;

      item.put(ITEM_TITLE, (i+1)+". "+getText(R.string.example_inflate));

      item.put(ITEM_SUBTITLE, getText(R.string.example_inflate_subtitle));

      activityMapping.put(i++, InflateActivity.class);

   item.put(ITEM_TITLE, (i+1)+". "+getText(R.string.example_earth));

   item.put(ITEM_SUBTITLE, getText(R.string.example_earth_subtitle));

   activityMapping.put(i++, EarthActivity.class);

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

// Copyright 2016 Leszek Koltunski                                                               //

//                                                                                               //

// This file is part of Distorted.                                                               //

//                                                                                               //

// Distorted is free software: you can redistribute it and/or modify                             //

// it under the terms of the GNU General Public License as published by                          //

// the Free Software Foundation, either version 2 of the License, or                             //

// (at your option) any later version.                                                           //

//                                                                                               //

// Distorted is distributed in the hope that it will be useful,                                  //

// but WITHOUT ANY WARRANTY; without even the implied warranty of                                //

// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the                                 //

// GNU General Public License for more details.                                                  //

//                                                                                               //

// You should have received a copy of the GNU General Public License                             //

// along with Distorted.  If not, see <http://www.gnu.org/licenses/>.                            //

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

package org.distorted.examples.earth;

import android.app.Activity;

import android.content.Intent;

import android.os.Bundle;

import android.view.Gravity;

import android.view.View;

import android.widget.AdapterView;

import android.widget.ArrayAdapter;

import android.widget.Button;

import android.widget.LinearLayout;

import android.widget.NumberPicker;

import android.widget.Spinner;

import android.widget.TableRow;

import org.distorted.examples.R;

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

public class EarthActivity extends Activity

                               implements View.OnClickListener, AdapterView.OnItemSelectedListener

  {

  private static final int COLOR_OFF = 0xffffe81f;

  private static final int COLOR_ON  = 0xff0000ff;

  private static final int COLOR_INAC= 0xff999999;

  private int mNumCols = 1;

  private int mNumRows = 1;

  private int mNumSlic = 1;

  private boolean mGridInitialized;

  private NumberPicker mColsPicker, mRowsPicker, mSlicPicker;

  private boolean[] mShape;

  private int mObjectType;

  private int mBitmapID;

  private LinearLayout mLay;

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

  @Override

  protected void onCreate(Bundle savedState)

    {

    super.onCreate(savedState);

    setContentView(R.layout.objectpickerlayout);

    mLay = findViewById(R.id.objectpicker_buttongrid);

    mColsPicker = findViewById(R.id.objectpicker_cols);

    mRowsPicker = findViewById(R.id.objectpicker_rows);

    mSlicPicker = findViewById(R.id.objectpicker_slices);

    mColsPicker.setMaxValue(40);

    mColsPicker.setMinValue( 1);

    mRowsPicker.setMaxValue(40);

    mRowsPicker.setMinValue( 1);

    mSlicPicker.setMaxValue(40);

    mSlicPicker.setMinValue( 0);

    mColsPicker.setOnValueChangedListener(new NumberPicker.OnValueChangeListener()

         {

         @Override

         public void onValueChange(NumberPicker picker, int oldVal, int newVal)

           {

           setGrid();

           }

         });

    mRowsPicker.setOnValueChangedListener(new NumberPicker.OnValueChangeListener()

         {

         @Override

         public void onValueChange(NumberPicker picker, int oldVal, int newVal)

           {

           setGrid();

           }

         });

    mSlicPicker.setOnValueChangedListener(new NumberPicker.OnValueChangeListener()

         {

         @Override

         public void onValueChange(NumberPicker picker, int oldVal, int newVal)

           {

           mNumSlic = mSlicPicker.getValue();

           }

         });

    mObjectType = 0;

    mGridInitialized = false;

    Spinner typeSpinner  = findViewById(R.id.objectpicker_spinnerType);

    typeSpinner.setOnItemSelectedListener(this);

    String[] objectType = new String[] {"Mesh: Cubes", "Mesh: Flat", "Mesh: Sphere", "Mesh: Quad"};

    ArrayAdapter<String> adapterType = new ArrayAdapter<>(this, android.R.layout.simple_spinner_item, objectType);

    adapterType.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);

    typeSpinner.setAdapter(adapterType);

    Spinner bitmapSpinner  = findViewById(R.id.objectpicker_spinnerBitmap);

    bitmapSpinner.setOnItemSelectedListener(this);

    String[] objectBitmap = new String[] { "Texture: Grid", "Texture: Girl", "Texture: Dog", "Texture: Cat",

                                           "Texture: Squares", "Texture: Bean", "Texture: Lisa", "Texture: World" };

    ArrayAdapter<String> adapterBitmap = new ArrayAdapter<>(this, android.R.layout.simple_spinner_item, objectBitmap);

    adapterBitmap.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);

    bitmapSpinner.setAdapter(adapterBitmap);

    }

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

  private void setGrid()

    {

    mGridInitialized = true;

    mNumCols = mColsPicker.getValue();

    mNumRows = mRowsPicker.getValue();

    int width = mLay.getWidth();

    int height= mLay.getHeight();

    int w = mNumCols>0 ? (int)( 0.9f*width / mNumCols) : 0;

    int h = mNumRows>0 ? (int)( 0.9f*height/ mNumRows) : 0;

    int size= w<h ? w:h;

    int pad = size<20 ? 1 : size/20;

    mLay.removeAllViews();

    mShape = new boolean[mNumRows*mNumCols];

    TableRow.LayoutParams p = new TableRow.LayoutParams();

    p.rightMargin  = pad;

    p.leftMargin   = pad;

    p.topMargin    = pad;

    p.bottomMargin = pad;

    p.height       = size;

    p.width        = size;

    for (int rows=0; rows<mNumRows; rows++)

      {

      TableRow tr = new TableRow(this);

      tr.setGravity(Gravity.CENTER);

      for(int cols=0; cols<mNumCols; cols++)

        {

        Button b = new Button(this);

        b.setOnClickListener(this);

        b.setId(rows*mNumCols+cols);

        b.setLayoutParams(p);

        b.setBackgroundColor(mObjectType==0 ? COLOR_ON:COLOR_INAC);

        tr.addView(b, p);

        mShape[rows*mNumCols+cols] = true;

        }

      mLay.addView(tr);

      }

    }

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

  public void onClick(View view)

    {

    if( mObjectType==0 )  // cubes

      {

      Button tmp = (Button)view;

      int id = tmp.getId();

      mShape[id] = !mShape[id];

      tmp.setBackgroundColor(mShape[id] ? COLOR_ON:COLOR_OFF);

      }

    }

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

  private void uncheckAll()

    {

    TableRow tr;

    Button butt;

    for (int row=0; row<mNumRows; row++)

      {

      tr = (TableRow)mLay.getChildAt(row);

      for(int col=0; col<mNumCols; col++)

        {

        butt = (Button)tr.getVirtualChildAt(col);

        butt.setBackgroundColor(mObjectType==0 ? COLOR_ON : COLOR_INAC);

        mShape[row*mNumCols+col] = true;

        }

      }

    }

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

  public void Create(View v)

    {

    Intent mainInt = new Intent( getApplicationContext(), EarthActivity2.class);

    Bundle b = new Bundle();

    int rows=0, cols=0;

    switch(mObjectType)

      {

      case 0:

      case 1: rows = mNumRows;

              cols = mNumCols;

              break;

      case 2: rows = mNumRows;   // always make the sphere equal in X and Y

              cols = mNumRows;   //

              break;

      case 3: rows = 1;          // a quad is always 1x1

              cols = 1;

              break;

      }

    b.putInt("type", mObjectType);

    b.putInt("cols", cols);

    b.putInt("rows", rows);

    b.putInt("slices", mNumSlic);

    b.putInt("bitmap", mBitmapID);

    if( mObjectType==0 )   // cubes

      {

      String str = "";

      for(int i=0; i<mNumRows*mNumCols; i++)

        str += mShape[i] ? "1" : "0";

      b.putString("string", str);

      }

    else

      {

      b.putString("string", "");

      }

    mainInt.putExtras(b);

    startActivity(mainInt);

    }

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

  public void onItemSelected(AdapterView<?> parent, View view, int pos, long id)

    {

    switch(parent.getId())

      {

      case R.id.objectpicker_spinnerType  : if( mObjectType!=pos )

                                              {

                                              mObjectType = pos;

                                              uncheckAll();

                                              switch(mObjectType)

                                                {

                                                case 0: mColsPicker.setEnabled(true);

                                                        mRowsPicker.setEnabled(true);

                                                        mSlicPicker.setEnabled(true);

                                                        break;

                                                case 1: mColsPicker.setEnabled(true);

                                                        mRowsPicker.setEnabled(true);

                                                        mSlicPicker.setEnabled(false);

                                                        break;

                                                case 2: mColsPicker.setEnabled(false);

                                                        mRowsPicker.setEnabled(true);

                                                        mSlicPicker.setEnabled(false);

                                                        break;

                                                case 3: mColsPicker.setEnabled(false);

                                                        mRowsPicker.setEnabled(false);

                                                        mSlicPicker.setEnabled(false);

                                                        break;

                                                }

                                              }

                                            break;

      case R.id.objectpicker_spinnerBitmap: switch(pos)

                                              {

                                              case 0: mBitmapID = -1            ; break;

                                              case 1: mBitmapID = R.raw.face    ; break;

                                              case 2: mBitmapID = R.raw.dog     ; break;

                                              case 3: mBitmapID = R.raw.cat     ; break;

                                              case 4: mBitmapID = R.raw.grid    ; break;

                                              case 5: mBitmapID = R.raw.bean    ; break;

                                              case 6: mBitmapID = R.raw.monalisa; break;

                                              case 7: mBitmapID = R.raw.world   ; break;

                                              }

                                            break;

      }

    }

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

  public void onNothingSelected(AdapterView<?> parent)

    {

    }

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

// Overrides

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

  @Override

  public void onWindowFocusChanged(boolean hasFocus)

    {

    super.onWindowFocusChanged(hasFocus);

    mColsPicker.setValue(mNumCols);

    mRowsPicker.setValue(mNumRows);

    mSlicPicker.setValue(mNumSlic);

    if( !mGridInitialized ) setGrid();

    }

  }

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

// Copyright 2016 Leszek Koltunski                                                               //

//                                                                                               //

// This file is part of Distorted.                                                               //

//                                                                                               //

// Distorted is free software: you can redistribute it and/or modify                             //

// it under the terms of the GNU General Public License as published by                          //

// the Free Software Foundation, either version 2 of the License, or                             //

// (at your option) any later version.                                                           //

//                                                                                               //

// Distorted is distributed in the hope that it will be useful,                                  //

// but WITHOUT ANY WARRANTY; without even the implied warranty of                                //

// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the                                 //

// GNU General Public License for more details.                                                  //

//                                                                                               //

// You should have received a copy of the GNU General Public License                             //

// along with Distorted.  If not, see <http://www.gnu.org/licenses/>.                            //

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

package org.distorted.examples.earth;

import android.app.Activity;

import android.graphics.Bitmap;

import android.graphics.BitmapFactory;

import android.graphics.Canvas;

import android.graphics.Paint;

import android.opengl.GLSurfaceView;

import android.os.Bundle;

import android.widget.SeekBar;

import android.widget.TextView;

import org.distorted.examples.R;

import org.distorted.library.main.Distorted;

import org.distorted.library.main.DistortedTexture;

import org.distorted.library.mesh.MeshBase;

import org.distorted.library.mesh.MeshCubes;

import org.distorted.library.mesh.MeshFlat;

import org.distorted.library.mesh.MeshQuad;

import org.distorted.library.mesh.MeshSphere;

import java.io.IOException;

import java.io.InputStream;

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

public class EarthActivity2 extends Activity implements SeekBar.OnSeekBarChangeListener

{

    private DistortedTexture mTexture;

    private MeshBase mMesh;

    private TextView mTextLevel;

    private int mBitmapID;

    private Bitmap mBitmap;

    private int mNumCols;

    private int mNumRows;

    private int mNumSlic;

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

    @Override

    protected void onPause() 

      {

      GLSurfaceView mView = this.findViewById(R.id.earthSurfaceView);

      if( mView!=null ) mView.onPause();

      Distorted.onPause();

      super.onPause();

      }

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

    @Override

    protected void onResume() 

      {

      super.onResume();

      GLSurfaceView mView = this.findViewById(R.id.earthSurfaceView);

      if( mView!=null ) mView.onResume();  

      }

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

    @Override

    protected void onDestroy() 

      {

      Distorted.onDestroy();  

      super.onDestroy();

      }

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

    @Override

    protected void onCreate(Bundle savedState)

      {

      super.onCreate(savedState);

      Bundle b = getIntent().getExtras();

      String str     = b.getString("string");

      int objectType = b.getInt("type");

      mNumCols       = b.getInt("cols");

      mNumRows       = b.getInt("rows");

      mNumSlic       = b.getInt("slices");

      mBitmapID      = b.getInt("bitmap");

      switch(objectType)

        {

        case 0: mMesh = new MeshCubes(mNumCols, str, mNumSlic);

                break;

        case 1: mMesh = new MeshFlat(mNumCols,mNumRows);

                break;

        case 2: mMesh = new MeshSphere(mNumRows);

                break;

        case 3: mMesh = new MeshQuad();

                break;

        }

      mTexture= new DistortedTexture(mNumCols,mNumRows);

      setContentView(R.layout.earthlayout);

      mTextLevel = findViewById(R.id.earthInflateText);

      SeekBar levelBar = findViewById(R.id.earthInflateLevel);

      levelBar.setOnSeekBarChangeListener(this);

      levelBar.setProgress(50);

      }

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

    public Bitmap getBitmap()

      {

      if( mBitmap==null )

        {

        if( mBitmapID!=-1)

          {

          InputStream is = getResources().openRawResource(mBitmapID);

          try

            {

            mBitmap = BitmapFactory.decodeStream(is);

            }

          finally

            {

            try

              {

              is.close();

              }

            catch(IOException e) { }

            }

          }

        else

          {

          final int W = 64*mNumCols;

          final int H = 64*mNumRows;

          Paint paint = new Paint();

          mBitmap = Bitmap.createBitmap(W,H, Bitmap.Config.ARGB_8888);

          Canvas canvas = new Canvas(mBitmap);

          paint.setAntiAlias(true);

          paint.setTextAlign(Paint.Align.CENTER);

          paint.setColor(0xff008800);

          paint.setStyle(Paint.Style.FILL);

          canvas.drawRect(0, 0, W, H, paint);

          paint.setColor(0xffffffff);

          for(int i=0; i<=mNumCols ; i++ ) canvas.drawRect(W*i/mNumCols-1, 0, W*i/mNumCols + 1, H, paint);

          for(int i=0; i<=mNumRows ; i++ ) canvas.drawRect( 0, H*i/mNumRows-1, W,  H*i/mNumRows+1, paint);

          }

        }

      return mBitmap;

      }

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

    public void onProgressChanged(SeekBar bar, int progress, boolean fromUser)

      {

      switch (bar.getId())

        {

        case R.id.earthInflateLevel: EarthSurfaceView view = this.findViewById(R.id.earthSurfaceView);

                                     float level = view.getRenderer().setLevel(progress);

                                     mTextLevel.setText(getString(R.string.inflate_placeholder, level));

                                     break;

        }

      }

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

    public void onStartTrackingTouch(SeekBar bar) { }

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

    public void onStopTrackingTouch(SeekBar bar)  { }

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

    public DistortedTexture getTexture()

      {

      return mTexture;

      }

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

    public MeshBase getMesh()

      {

      return mMesh;

      }

}

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

// Copyright 2016 Leszek Koltunski                                                               //

//                                                                                               //

// This file is part of Distorted.                                                               //

//                                                                                               //

// Distorted is free software: you can redistribute it and/or modify                             //

// it under the terms of the GNU General Public License as published by                          //

// the Free Software Foundation, either version 2 of the License, or                             //

// (at your option) any later version.                                                           //

//                                                                                               //

// Distorted is distributed in the hope that it will be useful,                                  //

// but WITHOUT ANY WARRANTY; without even the implied warranty of                                //

// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the                                 //

// GNU General Public License for more details.                                                  //

//                                                                                               //

// You should have received a copy of the GNU General Public License                             //

// along with Distorted.  If not, see <http://www.gnu.org/licenses/>.                            //

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

package org.distorted.examples.earth;

import android.opengl.GLSurfaceView;

import org.distorted.library.effect.MatrixEffectMove;

import org.distorted.library.effect.MatrixEffectQuaternion;

import org.distorted.library.effect.MatrixEffectScale;

import org.distorted.library.main.Distorted;

import org.distorted.library.main.DistortedEffects;

import org.distorted.library.main.DistortedScreen;

import org.distorted.library.main.DistortedTexture;

import org.distorted.library.mesh.MeshBase;

import org.distorted.library.type.DynamicQuat;

import org.distorted.library.type.Static3D;

import org.distorted.library.type.Static4D;

import javax.microedition.khronos.egl.EGLConfig;

import javax.microedition.khronos.opengles.GL10;

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

class EarthRenderer implements GLSurfaceView.Renderer

{

    private static final float FOV = 30.0f;

    private static final float NEAR = 0.1f;

    private GLSurfaceView mView;

    private DistortedTexture mTexture;

    private DistortedEffects mEffects;

    private MeshBase mMesh;

    private DistortedScreen mScreen;

    private int mObjWidth, mObjHeight, mObjDepth;

    private Static3D mMove, mScale, mCenter;

    Static4D mQuat1, mQuat2;

    int mScreenMin;

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

    EarthRenderer(GLSurfaceView v)

      {

      mView = v;

      mMove = new Static3D(0,0,0);

      mScale= new Static3D(1,1,1);

      mCenter=new Static3D(0,0,0);

      EarthActivity2 act = (EarthActivity2)v.getContext();

      mTexture = act.getTexture();

      mMesh    = act.getMesh();

      mObjWidth = mTexture.getWidth();

      mObjHeight= mTexture.getHeight();

      mObjDepth = mTexture.getDepth(mMesh);

      mQuat1 = new Static4D(0,0,0,1);  // unity

      mQuat2 = new Static4D(0,0,0,1);  // quaternions

      DynamicQuat quatInt1 = new DynamicQuat(0,0.5f);

      DynamicQuat quatInt2 = new DynamicQuat(0,0.5f);

      quatInt1.add(mQuat1);

      quatInt2.add(mQuat2);

      mEffects = new DistortedEffects();

      mEffects.apply( new MatrixEffectMove(mMove) );

      mEffects.apply( new MatrixEffectScale(mScale));

      mEffects.apply( new MatrixEffectQuaternion(quatInt1, mCenter) );

      mEffects.apply( new MatrixEffectQuaternion(quatInt2, mCenter) );

      mScreen = new DistortedScreen();

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

      mScreen.setProjection(FOV, NEAR);

      }

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

    public void onDrawFrame(GL10 glUnused) 

      {

      mScreen.render( System.currentTimeMillis() );

      }

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

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

      {

      final float SCALE = 0.75f;

      mScreenMin = width<height ? width:height;

      float factor = ( width*mObjHeight > height*mObjWidth ) ? (SCALE*height)/mObjHeight :  (SCALE*width)/mObjWidth;

      mMove.set( (width-factor*mObjWidth)/2 , (height-factor*mObjHeight)/2 , 0);

      mScale.set(factor,factor,factor);

      mCenter.set( (float)mObjWidth/2, (float)mObjHeight/2, (float)mObjDepth/2 );

      mScreen.resize(width, height);

      }

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

    float setLevel(int level)

      {

      float inflateLevel = (level-50)/50.0f;

      mMesh.setInflate(inflateLevel);

      return inflateLevel;

      }

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

    public void onSurfaceCreated(GL10 glUnused, EGLConfig config) 

      {

      EarthActivity2 act = (EarthActivity2)mView.getContext();

      mTexture.setTexture( act.getBitmap() );

      mScreen.detachAll();

      mScreen.attach(mTexture,mEffects,mMesh);

      try

        {

        Distorted.onCreate(mView.getContext());

        }

      catch(Exception ex)

        {

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

        }

      }

}

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

// Copyright 2016 Leszek Koltunski                                                               //

//                                                                                               //

// This file is part of Distorted.                                                               //

//                                                                                               //

// Distorted is free software: you can redistribute it and/or modify                             //

// it under the terms of the GNU General Public License as published by                          //

// the Free Software Foundation, either version 2 of the License, or                             //

// (at your option) any later version.                                                           //

//                                                                                               //

// Distorted is distributed in the hope that it will be useful,                                  //

// but WITHOUT ANY WARRANTY; without even the implied warranty of                                //

// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the                                 //

// GNU General Public License for more details.                                                  //

//                                                                                               //

// You should have received a copy of the GNU General Public License                             //

// along with Distorted.  If not, see <http://www.gnu.org/licenses/>.                            //

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

package org.distorted.examples.earth;

import android.app.ActivityManager;

import android.content.Context;

import android.content.pm.ConfigurationInfo;

import android.opengl.GLSurfaceView;

import android.util.AttributeSet;

import android.view.MotionEvent;

import android.widget.Toast;

import org.distorted.examples.R;

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

class EarthSurfaceView extends GLSurfaceView

{

    private int mX, mY;

    private EarthRenderer mRenderer;

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

    public EarthSurfaceView(Context context, AttributeSet attrs)

      {

      super(context,attrs);

      mX = -1;

      mY = -1;

      if(!isInEditMode())

        {

        mRenderer = new EarthRenderer(this);

        final ActivityManager activityManager     = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);

        final ConfigurationInfo configurationInfo = activityManager.getDeviceConfigurationInfo();

        setEGLContextClientVersion( (configurationInfo.reqGlEsVersion>>16) >= 3 ? 3:2 );

        setRenderer(mRenderer);

        Toast.makeText(context, R.string.example_rotate_toast , Toast.LENGTH_SHORT).show();

        }

      }

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

    public EarthRenderer getRenderer()

      {

      return mRenderer;

      }

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

    @Override public boolean onTouchEvent(MotionEvent event) 

      {

      int action = event.getAction();

      int x = (int)event.getX();

      int y = (int)event.getY();

      switch(action)

         {

         case MotionEvent.ACTION_DOWN: mX = x;

                                       mY = y;

                                       break;

         case MotionEvent.ACTION_MOVE: if( mX>=0 && mY>= 0 )

                                         {

                                         float px = mY-y;

                                         float py = mX-x;

                                         float pz = 0;

                                         float plen = (float)Math.sqrt(px*px + py*py + pz*pz);