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.deform;

import javax.microedition.khronos.egl.EGLConfig;

import javax.microedition.khronos.opengles.GL10;

import org.distorted.library.Distorted;

import org.distorted.library.DistortedEffects;

import org.distorted.library.DistortedFramebuffer;

import org.distorted.library.DistortedTexture;

import org.distorted.library.MeshObject;

import org.distorted.library.MeshFlat;

import org.distorted.library.EffectNames;

import org.distorted.library.EffectTypes;

import org.distorted.library.type.Dynamic3D;

import org.distorted.library.type.Static3D;

import org.distorted.library.type.Static4D;

import android.graphics.Bitmap;

import android.graphics.Canvas;

import android.graphics.Paint;

import android.graphics.Paint.Style;

import android.opengl.GLES20;

import android.opengl.GLSurfaceView;

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

class DeformRenderer implements GLSurfaceView.Renderer 

   {

   private static final int NUM_VECTORS =  8;

   private static final int NUM_LINES   = 10;

   private static final int NUM_FRAMES  = 10;

   private GLSurfaceView mView;

   private DistortedTexture fpsTexture, stretchTexture;

   private DistortedEffects fpsEffects, stretchEffects;

   private MeshObject fpsMesh, stretchMesh;

   private DistortedFramebuffer mScreen;

   private Static3D touchPoint;

   private Dynamic3D mReleasedDistortDynamic;

   private Dynamic3D mMovingDistortDynamic;

   private Static3D[] vDistort;

   private Dynamic3D mReleasedDeformDynamic;

   private Dynamic3D mMovingDeformDynamic;

   private Static3D[] vDeform;

   private Dynamic3D mReleasedShearDynamic;

   private Dynamic3D mMovingShearDynamic;

   private Static3D[] vShear;

   private Static4D mRegion;

   private Canvas fpsCanvas;

   private Bitmap fpsBitmap;

   private int scrHeight, scrWidth;

   private Paint mPaint;

   private int fpsH, fpsW;

   private String fpsString = "";

   private long lastTime=0;

   private long[] durations;

   private int currDuration;

   private EffectNames mMode = EffectNames.DISTORT;

   private boolean bitmapCreated = false;

   private long mLastEffect = -1;

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

   DeformRenderer(GLSurfaceView view)

      { 

      mView = view;

      mPaint = new Paint();

      mPaint.setAntiAlias(true);

      mPaint.setTextAlign(Paint.Align.CENTER);

      fpsEffects = new DistortedEffects();

      stretchEffects = new DistortedEffects();

      mRegion = new Static4D(0,0,50,50);

      durations = new long[NUM_FRAMES+1];

      currDuration = 0;

      for(int i=0; i<NUM_FRAMES+1; i++) durations[i]=0;

      // DISTORT

      mReleasedDistortDynamic = new Dynamic3D(NUM_VECTORS*500, 0.5f);

      mReleasedDistortDynamic.setMode(Dynamic3D.MODE_PATH);

      mMovingDistortDynamic = new Dynamic3D(0,0.5f);

      mMovingDistortDynamic.setMode(Dynamic3D.MODE_PATH);

      vDistort = new Static3D[NUM_VECTORS];

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

        {

        vDistort[i] = new Static3D(0,0,0);

        mReleasedDistortDynamic.add(vDistort[i]);

        }

      mMovingDistortDynamic.add(vDistort[0]);

      // Deform

      mReleasedDeformDynamic = new Dynamic3D(NUM_VECTORS*500, 0.5f);

      mReleasedDeformDynamic.setMode(Dynamic3D.MODE_PATH);

      mMovingDeformDynamic = new Dynamic3D(0,0.5f);

      mMovingDeformDynamic.setMode(Dynamic3D.MODE_PATH);

      vDeform = new Static3D[NUM_VECTORS];

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

        {

        vDeform[i] = new Static3D(0,0,0);

        mReleasedDeformDynamic.add(vDeform[i]);

        }

      mMovingDeformDynamic.add(vDeform[0]);

      // Shear

      mReleasedShearDynamic = new Dynamic3D(NUM_VECTORS*500, 0.5f);

      mReleasedShearDynamic.setMode(Dynamic3D.MODE_PATH);

      mMovingShearDynamic = new Dynamic3D(0,0.5f);

      mMovingShearDynamic.setMode(Dynamic3D.MODE_PATH);

      vShear = new Static3D[NUM_VECTORS];

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

        {

        vShear[i] = new Static3D(0,0,0);

        mReleasedShearDynamic.add(vShear[i]);

        }

      mMovingShearDynamic.add(vShear[0]);

      mScreen = new DistortedFramebuffer(0);

      }

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

   void setMode(EffectNames mode)

      {

      mMode = mode;  

      }

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

   void setRegionRadius(int r)

      {

      mRegion.set3( r==100 ? 100*scrWidth : r*scrWidth/100.0f);

      }

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

   public void onPause()

      {

      bitmapCreated = false;

      }

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

   public void onDrawFrame(GL10 glUnused)

     {

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

     long time = System.currentTimeMillis();

     mScreen.renderTo(stretchTexture, stretchMesh,stretchEffects,time);

     mPaint.setColor(0xffffffff);

     fpsCanvas.drawRect(0, 0, fpsW, fpsH, mPaint);

     mPaint.setColor(0xff000000);

     fpsCanvas.drawText(fpsString, fpsW/2, 5*fpsH/6, mPaint);

     fpsTexture.setTexture(fpsBitmap);

     mScreen.renderTo(fpsTexture, fpsMesh,fpsEffects,time);

     computeFPS(time);

     }

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

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

     {

     scrHeight = height;

     scrWidth  = width;

     if( !bitmapCreated )

       {

       createBitmap(scrWidth/2,scrHeight/2);

       stretchEffects.abortAllEffects();

       fpsEffects.abortAllEffects();

       stretchEffects.move( new Static3D(scrWidth/4,scrHeight/4,0) );

       fpsEffects.move( new Static3D(5,5,0) );

       bitmapCreated=true;

       }

     else

       {

       stretchEffects.abortEffects(EffectTypes.VERTEX);

       stretchEffects.abortEffects(EffectTypes.FRAGMENT);

       stretchEffects.abortEffects(EffectNames.SHEAR);

       }

     mScreen.resize(width, height);

     }

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

   public void onSurfaceCreated(GL10 glUnused, EGLConfig config)

     {

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

     try

       {

       Distorted.onCreate(mView.getContext());

       }

     catch(Exception ex)

       {

       android.util.Log.e("DeformRenderer", ex.toString() );

       }

     }

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

   private void createBitmap(int w, int h)

     {

     Canvas stretchCanvas;

     stretchTexture = new DistortedTexture(w,h);

     stretchMesh = new MeshFlat(50,50*h/w);

     Bitmap stretchBitmap = Bitmap.createBitmap(w,h, Bitmap.Config.ARGB_8888);

     stretchCanvas = new Canvas(stretchBitmap);

     fpsW = scrWidth/5;

     fpsH = fpsW/2;

     mPaint.setTextSize(2*fpsH/3);

     mPaint.setColor(0xff008800);

     mPaint.setStyle(Style.FILL);

     stretchCanvas.drawRect(0, 0, w, h, mPaint);

     mPaint.setColor(0xffffffff);

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

       {

       stretchCanvas.drawRect(w*i/NUM_LINES - 1,                 0,  w*i/NUM_LINES + 1,  h                , mPaint);

       stretchCanvas.drawRect(                0, h *i/NUM_LINES -1,  w                ,  h*i/NUM_LINES + 1, mPaint);

       }

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

     fpsTexture = new DistortedTexture(fpsW,fpsH);

     fpsMesh = new MeshFlat(1,1);

     fpsBitmap = Bitmap.createBitmap(fpsW,fpsH, Bitmap.Config.ARGB_8888);

     fpsCanvas = new Canvas(fpsBitmap);

     stretchTexture.setTexture(stretchBitmap);

     fpsTexture.setTexture(fpsBitmap);

     }

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

   void down(int x, int y)

     {

     int xt = x-scrWidth/4;

     int yt = y-scrHeight/4;

     if( xt<0 ) xt=0;

     if( xt>scrWidth/2 ) xt=scrWidth/2;

     if( yt<0 ) yt=0;

     if( yt>scrHeight/2 ) yt=scrHeight/2;

     touchPoint.set(xt,yt,0);

     switch(mMode)

       {

       case DISTORT: vDistort[0].set(0,0,0);

                     mLastEffect = stretchEffects.distort( mMovingDistortDynamic, touchPoint, mRegion);

                     break;

       case DEFORM : vDeform[0].set(0,0,0);

                     mLastEffect = stretchEffects.deform( mMovingDeformDynamic, touchPoint, mRegion);

                     break;

       case SHEAR  : vShear[0].set(0,0,0);

                     mLastEffect = stretchEffects.shear(mMovingShearDynamic, touchPoint);

                     break;

       }

     }

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

   void move(int x, int y)

     {

     switch(mMode)

       {

       case DISTORT: vDistort[0].set(x,y);

                     break;

       case DEFORM:  vDeform[0].set(x,y);

                     break;

       case SHEAR:   vShear[0].set( (float)x/(scrWidth/2), (float)y/(scrHeight/2));

                     break;

       }

     }

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

   void up()

     {

     stretchEffects.abortEffect(mLastEffect);

     float damp = -0.65f;

     switch(mMode)

       {

       case DISTORT: for(int i=1; i<NUM_VECTORS-1; i++)

                       {

                       vDistort[i].set( vDistort[i-1].getX()*damp, vDistort[i-1].getY()*damp );

                       }

                     vDistort[NUM_VECTORS-1].set(0,0);

                     stretchEffects.distort( mReleasedDistortDynamic, touchPoint, mRegion);

                     break;

       case DEFORM : for(int i=1; i<NUM_VECTORS-1; i++)

                       {

                       vDeform[i].set( vDeform[i-1].getX()*damp, vDeform[i-1].getY()*damp );

                       }

                     vDeform[NUM_VECTORS-1].set(0,0);

                     stretchEffects.deform( mReleasedDeformDynamic, touchPoint, mRegion);

                     break;

       case SHEAR  : for(int i=1; i<NUM_VECTORS-1; i++)

                       {

                       vShear[i].set( vShear[i-1].getX()*damp, vShear[i-1].getY()*damp );

                       }

                     vShear[NUM_VECTORS-1].set(0,0);

                     stretchEffects.shear(mReleasedShearDynamic, touchPoint);

                     break;

       }

     }

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

   private void computeFPS(long currentTime)

     {

     if( lastTime!=0 )

       {

       currDuration++;

       if( currDuration>=NUM_FRAMES ) currDuration = 0;

       durations[NUM_FRAMES] += ((currentTime-lastTime)-durations[currDuration]);

       durations[currDuration] = currentTime-lastTime;

       fpsString = "" + ((int)(10000.0f*NUM_FRAMES/durations[NUM_FRAMES]))/10.0f;

       }

     lastTime = currentTime;

     }

   }