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.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;

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

// Show how to use the setMax, notifyWhenFinished / effectFinished APIs

class ListenerRenderer implements GLSurfaceView.Renderer, EffectListener, DistortedLibrary.ExceptionListener

{

   private final int NUM_CONCURRENT_BUBBLES = 12;

   private GLSurfaceView mView;

   private DistortedEffects mEffects;

   private DistortedScreen mScreen;

   private DistortedTexture mTexture;

   private MeshRectangles mMesh;

   private Random mRnd;

   private Static3D mScale;

   private float mBmpRatio;

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

   ListenerRenderer(GLSurfaceView v)

      {

      mView = v;

      mTexture = new DistortedTexture();

      mScreen  = new DistortedScreen();

      mRnd     = new Random(0);

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

      mEffects = new DistortedEffects();

      mEffects.apply(new MatrixEffectScale(mScale));

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

        {

        VertexEffectDistort newEffect = createNewBubble();

        if( !mEffects.apply(newEffect) )

          {

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

          }

        }

      }

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

   private VertexEffectDistort createNewBubble()

      {

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

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

      float pointx =  0.80f * (mRnd.nextFloat()-0.5f); // at a random place on the bitmap (but not near the edge)

      float pointy =  0.80f * (mRnd.nextFloat()-0.5f); //

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

      // '1.0f' i.e. from (0,0,0) to (0,0,height) and back to (0,0,0) - full circle.

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

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

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

      Static3D center = new Static3D(pointx,pointy,0);

      Static4D region = new Static4D(0,0,0,radius);

      VertexEffectDistort distort = new VertexEffectDistort(dDistort,center,region);

      // We want to know when this effect finishes so that we can add a new one.

      distort.notifyWhenFinished(this);

      return distort;

      }

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

// An effect just finished, i.e. its Dynamic 'dDistort' reached its end point.

// The ID of the finished effect is 'effectID' but here we know it must be one of the Distorts

// and we don't care which one it is - just remove the finished effect from the Effect queues and

// add a new one right back in.

   public void effectFinished(final long effectID)

     {

     mEffects.abortById(effectID);

     VertexEffectDistort newEffect = createNewBubble();

     if( !mEffects.apply(newEffect) )

       {

       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( width<height ) mScale.set( width,   width*mBmpRatio, width  );

     else               mScale.set( height/mBmpRatio, height, height );

     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) { }

       }

     mBmpRatio = (float)bitmap.getHeight()/bitmap.getWidth();

     mTexture.setTexture(bitmap);

     if( mMesh==null ) mMesh = new MeshRectangles(50, (int)(50*mBmpRatio) );

     mScreen.detachAll();

     mScreen.attach(mTexture,mEffects,mMesh);

     // Normally we can only hold no more than 5 (see EffectType.reset()) Vertex

     // effects at any given time. Here we want 12, so we need to increase the default.

     // We need to call this before we call onCreate; best done here.

     // After onCreate we can also call this but only to decrease this value!

     //

     // 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_CONCURRENT_BUBBLES+1);

     VertexEffectDistort.enable();

     DistortedLibrary.onCreate(mView.getContext(), this);

     }

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

   public void distortedException(Exception ex)

     {

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

     }

}