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.movingeffects;

import android.content.Context;

import android.graphics.Canvas;

import android.graphics.Paint;

import android.graphics.Paint.Style;

import android.opengl.GLSurfaceView;

import android.os.Build;

import android.view.MotionEvent;

import android.util.AttributeSet;

import org.distorted.library.EffectTypes;

import org.distorted.library.type.Dynamic2D;

import org.distorted.library.type.Dynamic4D;

import org.distorted.library.type.Static1D;

import org.distorted.library.type.Static2D;

import org.distorted.library.type.Static3D;

import org.distorted.library.type.Static4D;

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

public class MovingEffectsSurfaceView extends GLSurfaceView

    {

    private static final int LOOP_TIME = 5000;

    private static final int NUM_POINTS= 100;

    public static final int EFFECT_POINTS=0;

    public static final int EFFECT_BUBBLE=1;

    public static final int EFFECT_SINK  =2;

    public static final int EFFECT_TRANS =3;

    public static final int EFFECT_CHROMA=4;

    public static final int EFFECT_SWIRL =5;

    private static Dynamic2D di2D;

    private static Static4D dr;

    private static Dynamic4D mRegion;

    private static Paint mPaint;

    private static int moving;

    private static final Object lock = new Object();

    private static long mTime = 0;

    private static int mCurrEffect;

    private static int mSize1, mSize2, mSizeR;

    private static int mMax;

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

    public MovingEffectsSurfaceView(Context c, AttributeSet attrs) 

      {

      super(c, attrs);

      mCurrEffect=EFFECT_POINTS;

      mPaint = new Paint();

      mPaint.setStyle(Style.FILL);

      moving = -1;

      di2D    = new Dynamic2D(LOOP_TIME,0.0f);

      mRegion = new Dynamic4D(LOOP_TIME,0.0f);

      if(!isInEditMode())

        {

        setFocusable(true);

        setFocusableInTouchMode(true);

        setEGLContextClientVersion(2);

        if( Build.FINGERPRINT.startsWith("generic") ) // when running on the emulator, insert a magic line that is

          {                                           // supposed to cure the 'no config chosen' crash on emulator startup

          setEGLConfigChooser(8, 8, 8, 8, 16, 0);   

          }

        MovingEffectsRenderer mRenderer = new MovingEffectsRenderer(this);

        setRenderer(mRenderer);

        }

      }

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

    public static void onSurfaceChanged(int width,int height)

      {

      mMax = width>height ? width:height;

      mSize1 = mMax/200;

      mSize2 = mMax/80;

      mSizeR = mMax/6;

      dr = new Static4D(0,0, mSizeR,mSizeR);

      }

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

    public static int getCurrentEffect()

      {

      return mCurrEffect;

      }

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

    public static void Bubble()

      {

      if( mCurrEffect==EFFECT_BUBBLE ) return;     

      synchronized(lock)

        {

        MovingEffectsRenderer.mBackground.abortEffects(EffectTypes.VERTEX);

        MovingEffectsRenderer.mBackground.abortEffects(EffectTypes.FRAGMENT);

        MovingEffectsRenderer.mBackground.distort( new Static3D(0,0,mMax/10) , di2D, dr);

        mCurrEffect = EFFECT_BUBBLE;

        }

      }

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

    public static void Sink()

      {

      if( mCurrEffect==EFFECT_SINK ) return; 

      synchronized(lock)

        {

        MovingEffectsRenderer.mBackground.abortEffects(EffectTypes.VERTEX);

        MovingEffectsRenderer.mBackground.abortEffects(EffectTypes.FRAGMENT);

        MovingEffectsRenderer.mBackground.sink(new Static1D(10), di2D, dr);

        mCurrEffect = EFFECT_SINK;

        }

      }

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

    public static void Chroma()

      {

      if( mCurrEffect==EFFECT_CHROMA ) return;

      synchronized(lock)

        {

        MovingEffectsRenderer.mBackground.abortEffects(EffectTypes.VERTEX);

        MovingEffectsRenderer.mBackground.abortEffects(EffectTypes.FRAGMENT);

        MovingEffectsRenderer.mBackground.chroma(new Static1D(0.5f), new Static3D(1,0,0), mRegion, true);

        mCurrEffect = EFFECT_CHROMA;

        }

      }

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

    public static void Transparency()

      {

      if( mCurrEffect==EFFECT_TRANS ) return;   

      synchronized(lock)

        {

        MovingEffectsRenderer.mBackground.abortEffects(EffectTypes.VERTEX);

        MovingEffectsRenderer.mBackground.abortEffects(EffectTypes.FRAGMENT);

        MovingEffectsRenderer.mBackground.alpha(new Static1D(0.5f), mRegion, true);

        mCurrEffect = EFFECT_TRANS;

        }

      }

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

    public static void Swirl()

      {

      if( mCurrEffect==EFFECT_SWIRL ) return;   

      synchronized(lock)

        {

        MovingEffectsRenderer.mBackground.abortEffects(EffectTypes.VERTEX);

        MovingEffectsRenderer.mBackground.abortEffects(EffectTypes.FRAGMENT);

        MovingEffectsRenderer.mBackground.swirl( new Static1D(30), di2D, dr);

        mCurrEffect = EFFECT_SWIRL;

        }

      }

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

    public static void Abort()

      {

      synchronized(lock)

        {

        MovingEffectsRenderer.mBackground.abortEffects(EffectTypes.VERTEX);

        MovingEffectsRenderer.mBackground.abortEffects(EffectTypes.FRAGMENT);

        di2D.removeAll();

        mRegion.removeAll();

        mCurrEffect = EFFECT_POINTS;

        }

      }

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

    public static void drawCurve(Canvas c, long time)

      {

      synchronized(lock)

        {  

        int len = di2D.getNumPoints();

        float[] drawCoord = new float[2];

        Static2D cu;

        int lit = mTime> 0 ? (int)((float)(time-mTime)*NUM_POINTS/LOOP_TIME)  : 0;

        if( len>=2 )

          {

          float step = (float)LOOP_TIME/(NUM_POINTS+1);

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

            {

            int color = i<=lit ? 0xff - (lit           -i)*0xff/(NUM_POINTS-1)

                               : 0xff - (lit+NUM_POINTS-i)*0xff/(NUM_POINTS-1);

            mPaint.setColor( 0xffffff + ((color&0xff)<<24) );  

            di2D.interpolateMain( drawCoord, 0, (long)(i*step) );

            c.drawCircle(drawCoord[0], drawCoord[1], mSize1, mPaint );

            }

          }

        mPaint.setColor(0xffff0000);

        for(int curr=0; curr<len; curr++)

          {       

          cu = di2D.getPoint(curr);

          c.drawCircle(cu.getX(), cu.getY(), mSize2, mPaint);

          }

        if( time-mTime > LOOP_TIME ) mTime = time;

        }

      }

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

    @Override public boolean onTouchEvent(MotionEvent event) 

      {

      if( mCurrEffect!=EFFECT_POINTS ) return true;   

      int xDown, yDown;

      switch(event.getAction())

        {

        case MotionEvent.ACTION_DOWN: xDown = (int)event.getX();

                                      yDown = (int)event.getY();

                                      float gx, gy;

                                      Static2D dv;

                                      int len = di2D.getNumPoints();

                                      for(int g=0; g<len; g++)

                                        {

                                        dv = di2D.getPoint(g); 

                                        gx = dv.getX();

                                        gy = dv.getY();

                                        if( (xDown-gx)*(xDown-gx) + (yDown-gy)*(yDown-gy) < (mMax*mMax)/100 )

                                          {

                                          moving = g;

                                          break;

                                          }

                                        }

                                      if( moving<0 )

                                        {

                                        synchronized(lock)

                                          {

                                          di2D.add(new Static2D(xDown,yDown));

                                          mRegion.add(new Static4D(xDown,yDown,mSizeR,mSizeR));

                                          }

                                        } 

                                      break;

        case MotionEvent.ACTION_MOVE: if( moving>=0 )

                                        {

                                        xDown = (int)event.getX();

                                        yDown = (int)event.getY();

                                        di2D.setPoint(moving, xDown, yDown);

                                        mRegion.setPoint(moving, xDown, yDown, mSizeR, mSizeR);

                                        }                           

                                      break;

        case MotionEvent.ACTION_UP  : moving = -1;

                                      break;

        }

      return true;

      }

  }