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.quaternion;

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.DistortedEffects;

import org.distorted.library.DistortedFramebuffer;

import org.distorted.library.EffectTypes;

import org.distorted.library.type.Dynamic;

import org.distorted.library.type.DynamicQuat;

import org.distorted.library.GridCubes;

import org.distorted.library.DistortedTexture;

import org.distorted.library.type.Static4D;

import org.distorted.library.type.Static3D;

import org.distorted.library.Distorted;

import android.graphics.Bitmap;

import android.graphics.BitmapFactory;

import android.opengl.GLES20;

import android.opengl.GLSurfaceView;

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

class QuaternionRenderer implements GLSurfaceView.Renderer 

  {

  private static final int NUM_QUATERNIONS = 5;

  private GLSurfaceView mView;

  private DistortedTexture mTexture;

  private DistortedEffects mEffects;

  private DistortedFramebuffer mScreen;

  private GridCubes mGrid;

  private DynamicQuat mRot;

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

  QuaternionRenderer(GLSurfaceView v)

    {

    mView    = v;

    mGrid    = new GridCubes(1,1,false);

    mTexture = new DistortedTexture(1,1);

    mEffects = new DistortedEffects();

    mRot     = new DynamicQuat();

    Random rnd = new Random(System.currentTimeMillis());

    float x,y,z,w, len;

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

      {

      x = 2*rnd.nextFloat()-1;

      y = 2*rnd.nextFloat()-1;

      z = 2*rnd.nextFloat()-1;

      w = 2*rnd.nextFloat()-1;

      len = (float)Math.sqrt( x*x+y*y+z*z+w*w );

      mRot.add(new Static4D(x/len,y/len,z/len,w/len));

      }

    mRot.setCount(0);

    mRot.setDuration(8000);

    mRot.setMode(Dynamic.MODE_LOOP);

    mScreen = new DistortedFramebuffer(0);

    }

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

  public void onDrawFrame(GL10 glUnused) 

    {

    GLES20.glClear( GLES20.GL_DEPTH_BUFFER_BIT | GLES20.GL_COLOR_BUFFER_BIT);

    mScreen.renderTo(mTexture, mGrid, mEffects, System.currentTimeMillis() );

    }

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

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

    {

    float scaleFactor = width>height ? height/3:width/3;

    mEffects.abortEffects(EffectTypes.MATRIX);

    mEffects.move( new Static3D( (width-scaleFactor)/2 , (height-scaleFactor)/2 , 0) );

    mEffects.scale(scaleFactor);

    mEffects.quaternion( mRot, new Static3D(0.5f,0.5f,0) );

    mScreen.resize(width, height);

    }

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

  public void onSurfaceCreated(GL10 glUnused, EGLConfig config) 

    {

    GLES20.glClearColor(0.0f, 0.0f, 0.0f, 1.0f);

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

    Bitmap bitmap;

    try 

      {

      bitmap = BitmapFactory.decodeStream(is);

      } 

    finally 

      {

      try 

        {

        is.close();

        } 

      catch(IOException e) { }

      }  

    mTexture.setTexture(bitmap);

    try

      {

      Distorted.onSurfaceCreated(mView.getContext());

      }

    catch(Exception ex)

      {

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

      }

    }

  }