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.EffectTypes;

import org.distorted.library.type.Dynamic;

import org.distorted.library.type.DynamicQuat;

import org.distorted.library.DistortedCubes;

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 static final int SIZE = 100;

  private GLSurfaceView mView;

  private DistortedCubes mCube;

  private Random mRnd = new Random(System.currentTimeMillis());

  private DynamicQuat mRot;

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

  public QuaternionRenderer(GLSurfaceView v) 

    {

    mView = v;

    mCube = new DistortedCubes( 3, "000010000", SIZE);

    mRot = new DynamicQuat();

    float x,y,z,w, len;

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

      {

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

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

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

      w = 2*mRnd.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);

    }

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

  public void onDrawFrame(GL10 glUnused) 

    {

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

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

    mCube.draw(System.currentTimeMillis());

    }

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

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

    {

    mCube.abortEffects(EffectTypes.MATRIX);

    if( width > height )

      {

      float factor = height/(3.0f*SIZE);

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

      mCube.scale( new Static3D(factor,factor,factor) );

      }  

    else

      {

      float factor = width/(3.0f*SIZE);

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

      mCube.scale( new Static3D(factor,factor,factor) );

      }

    mCube.quaternion( new Static3D(3*SIZE/2,3*SIZE/2,0), mRot);

    Distorted.onSurfaceChanged(width, height); 

    }

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

  public void onSurfaceCreated(GL10 glUnused, EGLConfig config) 

    {

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

    Bitmap bitmap;

    try 

      {

      bitmap = BitmapFactory.decodeStream(is);

      } 

    finally 

      {

      try 

        {

        is.close();

        } 

      catch(IOException e) { }

      }  

    mCube.setBitmap(bitmap);

    try

      {

      Distorted.onSurfaceCreated(mView.getContext());

      }

    catch(Exception ex)

      {

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

      }

    }

  }