Distorted Android

        <activity android:name=".multiblur.MultiblurActivity"/>

import org.distorted.examples.multiblur.MultiblurActivity;

   {

      final Map<String, Object> item = new HashMap<>();

      item.put(ITEM_IMAGE, R.drawable.icon_example_multiblur);

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

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

      data.add(item);

      activityMapping.put(i++, MultiblurActivity.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.multiblur;

import android.app.Activity;

import android.os.Bundle;

import org.distorted.library.Distorted;

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

public class MultiblurActivity extends Activity

{

    private MultiblurSurfaceView mView;

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

    @Override

    protected void onCreate(Bundle savedState) 

      {

      super.onCreate(savedState);

      mView = new MultiblurSurfaceView(this);

      setContentView(mView);

      }

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

    @Override

    protected void onPause() 

      {

      mView.onPause();

      super.onPause();

      }

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

    @Override

    protected void onResume() 

      {

      super.onResume();

      mView.onResume();

      }

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

    @Override

    protected void onDestroy() 

      {

      Distorted.onDestroy();  

      super.onDestroy();

      }

}

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

// 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.multiblur;

import android.graphics.Bitmap;

import android.graphics.BitmapFactory;

import android.opengl.GLES30;

import android.opengl.GLSurfaceView;

import org.distorted.examples.R;

import org.distorted.library.Distorted;

import org.distorted.library.DistortedEffects;

import org.distorted.library.DistortedFramebuffer;

import org.distorted.library.DistortedTexture;

import org.distorted.library.EffectTypes;

import org.distorted.library.MeshCubes;

import org.distorted.library.MeshObject;

import org.distorted.library.type.DynamicQuat;

import org.distorted.library.type.Static3D;

import org.distorted.library.type.Static4D;

import java.io.IOException;

import java.io.InputStream;

import javax.microedition.khronos.egl.EGLConfig;

import javax.microedition.khronos.opengles.GL10;

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

class MultiblurRenderer implements GLSurfaceView.Renderer

{

    private static final int[] MOVE_VEC =

        {

        +1,+1,+1,

        +1,-1,+1,

        +1,+1,-1,

        +1,-1,-1,

        -1,+1,+1,

        -1,-1,+1,

        -1,+1,-1,

        -1,-1,-1

        };

    private static final int NUM_OBJECTS = MOVE_VEC.length/3;

    private GLSurfaceView mView;

    private DistortedTexture mTex1, mTex2;

    private DistortedEffects[] mEffects;

    private Static3D[] mMoveVector;

    private MeshObject mMesh;

    private DistortedFramebuffer mScreen;

    private DynamicQuat mQuatInt1, mQuatInt2;

    private int mObjWidth, mObjHeight;

    Static4D mQuat1, mQuat2;

    int mScreenMin;

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

    MultiblurRenderer(GLSurfaceView v)

      {

      mView = v;

      mMoveVector = new Static3D[NUM_OBJECTS];

      for(int i=0; i<NUM_OBJECTS; i++) mMoveVector[i] = new Static3D(0,0,0);

      mEffects = new DistortedEffects[NUM_OBJECTS];

      for(int i=0; i<NUM_OBJECTS; i++) mEffects[i] = new DistortedEffects();

      mMesh = new MeshCubes(1,1,false);

      mTex1 = new DistortedTexture(100,100);

      mTex2 = new DistortedTexture(100,100);

      mObjWidth = mTex1.getWidth();

      mObjHeight= mTex2.getHeight();

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

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

      mQuatInt1 = new DynamicQuat(0,0.5f);

      mQuatInt2 = new DynamicQuat(0,0.5f);

      mQuatInt1.add(mQuat1);

      mQuatInt2.add(mQuat2);

      mScreen = new DistortedFramebuffer(0);

      }

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

    public void onDrawFrame(GL10 glUnused) 

      {

      GLES30.glClear( GLES30.GL_DEPTH_BUFFER_BIT | GLES30.GL_COLOR_BUFFER_BIT);

      long time = System.currentTimeMillis();

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

        mScreen.renderTo( i<NUM_OBJECTS/2 ? mTex1:mTex2, mMesh, mEffects[i], time );

      }

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

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

      {

      mScreenMin = width<height ? width:height;

      Static3D center = new Static3D( (float)mObjWidth/2, (float)mObjHeight/2, 0.0f );

      float factor = Math.min((0.15f*height)/mObjHeight,(0.15f*width )/mObjWidth);

      float xMove  =(width -factor*mObjWidth )/2;

      float yMove  =(height-factor*mObjHeight)/2;

      float size   = 1.3f*mObjWidth;

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

        {

        mEffects[i].abortEffects(EffectTypes.MATRIX);

        mMoveVector[i].set(xMove,yMove,0);

        mEffects[i].move(mMoveVector[i]);

        mEffects[i].scale(factor);

        mEffects[i].quaternion(mQuatInt1, center);

        mEffects[i].quaternion(mQuatInt2, center);

        mMoveVector[i].set(size*MOVE_VEC[3*i], size*MOVE_VEC[3*i+1], size*MOVE_VEC[3*i+2]);

        mEffects[i].move(mMoveVector[i]);

        }

      mScreen.resize(width, height);

      }

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

    public void onSurfaceCreated(GL10 glUnused, EGLConfig config) 

      {

      GLES30.glClearColor(0.0f, 0.0f, 0.0f, 1.0f);

      InputStream is1 = mView.getContext().getResources().openRawResource(R.raw.cat);

      InputStream is2 = mView.getContext().getResources().openRawResource(R.raw.dog);

      Bitmap bitmap1,bitmap2;

      try 

        {

        bitmap1 = BitmapFactory.decodeStream(is1);

        bitmap2 = BitmapFactory.decodeStream(is2);

        }

      finally 

        {

        try 

          {

          is1.close();

          is2.close();

          }

        catch(IOException e) { }

        }  

      mTex1.setTexture(bitmap1);

      mTex2.setTexture(bitmap2);

      try

        {

        Distorted.onCreate(mView.getContext());

        }

      catch(Exception ex)

        {

        android.util.Log.e("Multiblur", 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.multiblur;

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 MultiblurSurfaceView extends GLSurfaceView

{

    private int mX, mY;

    private MultiblurRenderer mRenderer;

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

    public MultiblurSurfaceView(Context context)

      {

      super(context);

      mX = -1;

      mY = -1;

      if(!isInEditMode())

        {

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

        final ConfigurationInfo configurationInfo = activityManager.getDeviceConfigurationInfo();

        android.util.Log.e("View", "Using OpenGL ES "+configurationInfo.getGlEsVersion());

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

        mRenderer = new MultiblurRenderer(this);

        setRenderer(mRenderer);

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

        }

      }

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

    @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);

                                         if( plen>0 )

                                           {

                                           px /= plen;

                                           py /= plen;

                                           pz /= plen;

                                           float cosA = (float)Math.cos(plen*3.14f/mRenderer.mScreenMin);

                                           float sinA = (float)Math.sqrt(1-cosA*cosA);

                                           mRenderer.mQuat1.set(px*sinA, py*sinA, pz*sinA, cosA);

                                           }

                                         }                             

                                       break;

         case MotionEvent.ACTION_UP  : mX = -1;

                                       mY = -1;

                                       float qx = mRenderer.mQuat1.getX();

                                       float qy = mRenderer.mQuat1.getY();

                                       float qz = mRenderer.mQuat1.getZ();

                                       float qw = mRenderer.mQuat1.getW();

                                       float rx = mRenderer.mQuat2.getX();

                                       float ry = mRenderer.mQuat2.getY();

                                       float rz = mRenderer.mQuat2.getZ();

                                       float rw = mRenderer.mQuat2.getW();

                                       // This is quaternion multiplication. (tx,ty,tz,tw)

                                       // is now equal to (qx,qy,qz,qw)*(rx,ry,rz,rw)

                                       float tx = rw*qx - rz*qy + ry*qz + rx*qw;

                                       float ty = rw*qy + rz*qx + ry*qw - rx*qz;

                                       float tz = rw*qz + rz*qw - ry*qx + rx*qy;

                                       float tw = rw*qw - rz*qz - ry*qy - rx*qx;

                                       // The point of this is so that there are always

                                       // exactly 2 quaternions: Quat1 representing the rotation

                                       // accumulating only since the last screen touch, and Quat2

                                       // which remembers the combined effect of all previous

                                       // swipes.

                                       // We cannot be accumulating an ever-growing list of quaternions

                                       // and add a new one every time user swipes the screen - there

                                       // is a limited number of slots in the EffectQueueMatrix!

                                       mRenderer.mQuat1.set(0f, 0f, 0f, 1f);

                                       mRenderer.mQuat2.set(tx, ty, tz, tw);

                                       break;

         }

      return true;

      }

}

    <string name="example_multiblur">Multiblur</string>

    <string name="example_multiblur_subtitle">Blur multiple objects which obstruct each other.</string>