Distorted Android

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

// 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.listener;

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.distorted.examples.R;

import org.distorted.library.effect.EffectType;

import org.distorted.library.effect.MatrixEffectMove;

import org.distorted.library.effect.MatrixEffectScale;

import org.distorted.library.effect.VertexEffectDistort;

import org.distorted.library.main.DistortedLibrary;

import org.distorted.library.main.DistortedScreen;

import org.distorted.library.mesh.MeshRectangles;

import org.distorted.library.main.DistortedTexture;

import org.distorted.library.main.DistortedEffects;

import org.distorted.library.type.Dynamic3D;

import org.distorted.library.type.Static3D;

import org.distorted.library.type.Static4D;

import org.distorted.library.message.EffectListener;

import android.graphics.Bitmap;

import android.graphics.BitmapFactory;

import android.opengl.GLSurfaceView;

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

class ListenerRenderer implements GLSurfaceView.Renderer,EffectListener 

{

   private final int NUM_BUBBLES = 12;

   private GLSurfaceView mView;

   private DistortedEffects mEffects;

   private DistortedScreen mScreen;

   private DistortedTexture mTexture;

   private MeshRectangles mMesh;

   private int bmpHeight, bmpWidth;

   private Random mRnd;

   private Static3D mMove, mScale;

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

   ListenerRenderer(GLSurfaceView v)

      {

      mView = v;

      mScreen = new DistortedScreen();

      mRnd = new Random(0);

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

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

      }

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

   private boolean addNewBubble()

      {

      int radius   = (int)(( 0.10f + 0.70f*mRnd.nextFloat())*bmpWidth);           // pop up a bubble of size (radius,height)

      int height   = (int)((-0.10f + 0.20f*mRnd.nextFloat())*bmpWidth);           // 

      int pointx   = mRnd.nextInt( (int)(0.8f*bmpWidth ))+ (int)(0.1f*bmpWidth ); // at a random place on the bitmap (but not near the edge)

      int pointy   = mRnd.nextInt( (int)(0.8f*bmpHeight))+ (int)(0.1f*bmpHeight); // 

      int duration = 1000 + mRnd.nextInt(3000);                                   // for anytime from 1 to 4 seconds

      Dynamic3D dDistort = new Dynamic3D(duration,1.0f);

      dDistort.add(new Static3D(0,0,     0));

      dDistort.add(new Static3D(0,0,height));

      VertexEffectDistort distort = new VertexEffectDistort(dDistort, new Static3D(pointx,pointy,0), new Static4D(0,0,0,radius));

      distort.notifyWhenFinished(this);

      return mEffects.apply(distort);

      }

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

   public void effectFinished(final long effectID)

     {

     mEffects.abortById(effectID);

     if( !addNewBubble() )

       {

       android.util.Log.e("Listener", "failed to add new bubble - this should never happen!");

       }

     }

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

    public void onDrawFrame(GL10 glUnused) 

      {

      mScreen.render( System.currentTimeMillis() );

      }

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

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

     {

     if( (float)bmpHeight/bmpWidth > (float)height/width )

       {

       int w = (height*bmpWidth)/bmpHeight;

       float factor = (float)height/bmpHeight;

       mMove.set((width-w)*0.5f,0,0);

       mScale.set(factor,factor,factor);

       }

     else

       {

       int h = (width*bmpHeight)/bmpWidth;

       float factor = (float)width/bmpWidth;

       mMove.set(0,(height-h)*0.5f,0);

       mScale.set(factor,factor,factor);

       }

     mScreen.resize(width, height);

     }

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

   public void onSurfaceCreated(GL10 glUnused, EGLConfig config)

     {

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

     Bitmap bitmap;

     try

       {

       bitmap = BitmapFactory.decodeStream(is);

       }

     finally

       {

       try

         {

         is.close();

         }

       catch(IOException e) { }

       }

     bmpHeight = bitmap.getHeight();

     bmpWidth  = bitmap.getWidth();

     if( mTexture==null ) mTexture = new DistortedTexture();

     mTexture.setTexture(bitmap);

     if( mMesh==null )

       {

       mMesh = new MeshRectangles(50,50*bmpHeight/bmpWidth);

       mMesh.setStretch(bmpWidth,bmpHeight,0);

       }

     if( mEffects==null )

       {

       mEffects = new DistortedEffects();

       mEffects.apply(new MatrixEffectScale(mScale));

       mEffects.apply(new MatrixEffectMove(mMove));

       }

     mScreen.detachAll();

     mScreen.attach(mTexture,mEffects,mMesh);

     for(int i=0; i<NUM_BUBBLES; i++) addNewBubble();

     // one more than we have bubbles at any given time because it can sometimes

     // happen that the old bubble is not yet removed when we add a new one

     DistortedLibrary.setMax(EffectType.VERTEX,NUM_BUBBLES+1);

     VertexEffectDistort.enable();

     try

       {

       DistortedLibrary.onCreate(mView.getContext());

       }

     catch(Exception ex)

       {

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

       }

     }

}