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.catanddog;

import java.io.IOException;

import java.io.InputStream;

import javax.microedition.khronos.egl.EGLConfig;

import javax.microedition.khronos.opengles.GL10;

import org.distorted.examples.R;

import org.distorted.library.Distorted;

import org.distorted.library.DistortedEffects;

import org.distorted.library.DistortedScreen;

import org.distorted.library.DistortedTexture;

import org.distorted.library.EffectNames;

import org.distorted.library.MeshFlat;

import org.distorted.library.EffectTypes;

import org.distorted.library.type.Dynamic1D;

import org.distorted.library.type.Dynamic3D;

import org.distorted.library.type.Static1D;

import org.distorted.library.type.Static3D;

import org.distorted.library.type.Static4D;

import android.graphics.Bitmap;

import android.graphics.BitmapFactory;

import android.opengl.GLSurfaceView;

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

class CatAndDogRenderer implements GLSurfaceView.Renderer

{

    private GLSurfaceView mView;

    private DistortedEffects mEffects;

    private MeshFlat mMesh;

    private DistortedTexture mTexture;

    private DistortedScreen mScreen;

    private int bmpHeight, bmpWidth;

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

    CatAndDogRenderer(GLSurfaceView v)

      {   

      mView = v;

      mMesh = new MeshFlat(1,1);  // no vertex effects, grid can be a (1x1) quad.

      mEffects = new DistortedEffects();

      Static4D chromaRegion= new Static4D( 530, 200,100,100);

      Static4D alphaRegion = new Static4D( 230, 200,100,100);

      Dynamic1D chromaDyn = new Dynamic1D(3000,0.0f);

      chromaDyn.add(new Static1D(1));

      chromaDyn.add(new Static1D(0));

      mEffects.chroma(chromaDyn, new Static3D(1,0,0), chromaRegion ,true);

      Dynamic1D alphaDyn = new Dynamic1D(3000,0.0f);

      alphaDyn.add(new Static1D(1));

      alphaDyn.add(new Static1D(0));

      mEffects.alpha( alphaDyn, alphaRegion, false );

      mScreen = new DistortedScreen();

      }

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

    public void onDrawFrame(GL10 glUnused) 

      {

      mScreen.render( System.currentTimeMillis() );

      }

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

    public void onSurfaceCreated(GL10 glUnused, EGLConfig config) 

      {

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

      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(bmpWidth,bmpHeight);

      mTexture.setTexture(bitmap);

      mScreen.detachAll();

      mScreen.attach(mTexture,mEffects,mMesh);

      DistortedEffects.enableEffect(EffectNames.SMOOTH_CHROMA);

      DistortedEffects.enableEffect(EffectNames.ALPHA);

      try

        {

        Distorted.onCreate(mView.getContext());

        }

      catch(Exception ex)

        {

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

        }

      }

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

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

      {

      // 1 cycle = 10000 ms = 10 seconds long

      int duration = 10000;

      // First abort all effect we might have had before

      // (we will if we got here from a brief stay in the background)

      mEffects.abortEffects(EffectTypes.MATRIX);

      // Now start applying the effects. Matrix effects are, like the name suggests, multiplications

      // of the Mesh by certain Projective Transformation Matrix. As such, those are - confusingly -

      // applied in exactly the opposite order than given, i.e. here the last SCALE would be the

      // first effect applied to each vertex of our Mesh, followed by a ROTATION, and only then by

      // the MOVE !

      // MOVES /////////

      // Now, after the SCALE and ROTATE, the center of our Mesh is still exactly at the center of

      // the Screen. Thus we move the Mesh back and forth between (0.5,0.5,0) and (-0.5,-0.5,0) ,

      // i.e. between the lower right and upper left corners of the screen.

      Dynamic3D diMove = new Dynamic3D(duration,0.0f);

      Static3D lowerRight = new Static3D( +0.5f, +0.5f, 0);

      Static3D upperLeft  = new Static3D( -0.5f, -0.5f, 0);

      diMove.add(lowerRight);

      diMove.add(upperLeft);

      mEffects.move(diMove);

      // ROTATION //////

      // Now, after the SCALE, our Texture is positioned at the center of the screen - coords (0,0,0).

      // Rotate the whole Mesh around this point, along the (0,0,1) axis (i.e. vector perpendicular to

      // the surface of the screen) starting from 0 degrees to 360 and back.

      Dynamic1D diRotate = new Dynamic1D(duration,0.0f);

      diRotate.add(new Static1D(  0));

      diRotate.add(new Static1D(360));

      Static3D axis = new Static3D(0,0,1);

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

      mEffects.rotate( diRotate, axis, center );

      // SCALING ///////

      // Before we apply any effects, at the very start, out Mesh skinned by the 'Cat and Dog' texture

      // fills up the whole Screen. First we need to scale it down so that the resolution of the

      // original 'Cat and Dog' bitmap are preserved, (qx/qy part) and also apply a Dynamic switching

      // the size from 80% of the Screen to 20% and back.

      Dynamic3D diScale = new Dynamic3D(duration,0.0f);

      float qx = (float)width /bmpWidth;

      float qy = (float)height/bmpHeight;

      float start_scale = 0.8f;

      float end_scale   = 0.2f;

      diScale.add(qx<qy ? (new Static3D( start_scale,start_scale*qx/qy,1)) : (new Static3D(start_scale*qy/qx,start_scale,1)));

      diScale.add(qx<qy ? (new Static3D( end_scale  ,end_scale  *qx/qy,1)) : (new Static3D(end_scale  *qy/qx,end_scale  ,1)));

      mEffects.scale(diScale);

      // Finally, tell the Screen itself the underlying OpenGL surface has changed dimensions.

      mScreen.resize(width, height);

      }

}