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.effect.EffectName;

import org.distorted.library.effect.MatrixEffectShear;

import org.distorted.library.effect.VertexEffectDeform;

import org.distorted.library.effect.VertexEffectDistort;

import org.distorted.library.main.Distorted;

import org.distorted.library.main.DistortedEffects;

import org.distorted.library.main.DistortedScreen;

import org.distorted.library.main.DistortedTexture;

import org.distorted.library.mesh.MeshBase;

import org.distorted.library.mesh.MeshFlat;

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.GLSurfaceView;

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

class DeformRenderer implements GLSurfaceView.Renderer 

   {

   private static final int NUM_VECTORS =  8;

   private static final int NUM_LINES   = 10;

   private GLSurfaceView mView;

   private DistortedTexture stretchTexture;

   private DistortedEffects stretchEffects;

   private MeshBase stretchMesh;

   private DistortedScreen mScreen;

   private Static3D mTouchPoint;

   private Static3D[] vDistort;

   private Static3D[] vDeform;

   private Static3D[] vShear;

   private Static4D mRegion;

   private int scrHeight, scrWidth;

   private int textureWidth, textureHeight;

   private float mRadius;

   private EffectName mMode = EffectName.DISTORT;

   private long mLastEffect = -1;

   private MatrixEffectShear mMovingShear, mReleasedShear;

   private VertexEffectDistort mMovingDistort, mReleasedDistort;

   private VertexEffectDeform mMovingDeform, mReleasedDeform;

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

   DeformRenderer(GLSurfaceView view)

      { 

      mView = view;

      stretchEffects = new DistortedEffects();

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

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

      // DISTORT

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

      releasedDistortDynamic.setMode(Dynamic3D.MODE_PATH);

      Dynamic3D movingDistortDynamic = new Dynamic3D(0,0.5f);

      movingDistortDynamic.setMode(Dynamic3D.MODE_PATH);

      vDistort = new Static3D[NUM_VECTORS];

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

        {

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

        releasedDistortDynamic.add(vDistort[i]);

        }

      movingDistortDynamic.add(vDistort[0]);

      // Deform

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

      releasedDeformDynamic.setMode(Dynamic3D.MODE_PATH);

      Dynamic3D movingDeformDynamic = new Dynamic3D(0,0.5f);

      movingDeformDynamic.setMode(Dynamic3D.MODE_PATH);

      vDeform = new Static3D[NUM_VECTORS];

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

        {

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

        releasedDeformDynamic.add(vDeform[i]);

        }

      movingDeformDynamic.add(vDeform[0]);

      // Shear

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

      releasedShearDynamic.setMode(Dynamic3D.MODE_PATH);

      Dynamic3D movingShearDynamic = new Dynamic3D(0,0.5f);

      movingShearDynamic.setMode(Dynamic3D.MODE_PATH);

      vShear = new Static3D[NUM_VECTORS];

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

        {

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

        releasedShearDynamic.add(vShear[i]);

        }

      movingShearDynamic.add(vShear[0]);

      mScreen = new DistortedScreen();

      mScreen.showFPS();

      mMovingDistort   = new VertexEffectDistort( movingDistortDynamic  , mTouchPoint, mRegion);

      mMovingDeform    = new VertexEffectDeform ( movingDeformDynamic   , mTouchPoint, mRegion);

      mMovingShear     = new MatrixEffectShear  ( movingShearDynamic    , mTouchPoint         );

      mReleasedDistort = new VertexEffectDistort( releasedDistortDynamic, mTouchPoint, mRegion);

      mReleasedDeform  = new VertexEffectDeform ( releasedDeformDynamic , mTouchPoint, mRegion);

      mReleasedShear   = new MatrixEffectShear  ( releasedShearDynamic  , mTouchPoint         );

      }

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

   void setMode(EffectName mode)

      {

      mMode = mode;  

      }

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

   void setRegionRadius(int r)

      {

      mRadius = ( r==100 ? 100.0f : r/200.0f);

      mRegion.set4(mRadius*scrWidth);

      }

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

   public void onDrawFrame(GL10 glUnused)

     {

     mScreen.render(System.currentTimeMillis());

     }

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

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

     {

     scrHeight = height;

     scrWidth  = width;

     mRegion.set4(mRadius*scrWidth);

     Canvas stretchCanvas;

     textureWidth = (int)(0.6f*width);

     textureHeight= (int)(0.6f*height);

     if( stretchMesh!=null ) stretchMesh.markForDeletion();

     stretchMesh = new MeshFlat(50,50*textureHeight/textureWidth);

     Bitmap stretchBitmap = Bitmap.createBitmap(textureWidth,textureHeight, Bitmap.Config.ARGB_8888);

     stretchCanvas = new Canvas(stretchBitmap);

     Paint paint = new Paint();

     paint.setColor(0xff008800);

     paint.setStyle(Style.FILL);

     stretchCanvas.drawRect(0, 0, textureWidth, textureHeight, paint);

     paint.setColor(0xffffffff);

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

       {

       stretchCanvas.drawRect(textureWidth*i/NUM_LINES-1,                           0, textureWidth*i/NUM_LINES+1, textureHeight              , paint);

       stretchCanvas.drawRect(                         0, textureHeight*i/NUM_LINES-1, textureWidth              , textureHeight*i/NUM_LINES+1, paint);

       }

     if( stretchTexture==null ) stretchTexture = new DistortedTexture(textureWidth,textureHeight);

     stretchTexture.setTexture(stretchBitmap);

     mScreen.detachAll();

     mScreen.attach(stretchTexture,stretchEffects,stretchMesh);

     mScreen.resize(width, height);

     }

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

   public void onSurfaceCreated(GL10 glUnused, EGLConfig config)

     {

     VertexEffectDistort.enable();

     VertexEffectDeform.enable();

     try

       {

       Distorted.onCreate(mView.getContext());

       }

     catch(Exception ex)

       {

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

       }

     }

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

   void down(int x, int y)

     {

     int xt = x-(scrWidth -textureWidth )/2;

     int yt = y-(scrHeight-textureHeight)/2;

     yt = textureHeight - yt;  // OpenGL coord system and 2D coords have inverted Y axis

     switch(mMode)

       {

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

                     stretchEffects.apply(mMovingDistort);

                     mLastEffect = mMovingDistort.getID();

                     mTouchPoint.set(xt,yt,0);

                     break;

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

                     stretchEffects.apply(mMovingDeform);

                     mLastEffect = mMovingDeform.getID();

                     mTouchPoint.set(xt,yt,0);

                     break;

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

                     stretchEffects.apply(mMovingShear);

                     mLastEffect = mMovingShear.getID();

                     mTouchPoint.set(xt-textureWidth/2,yt-textureHeight/2,0);

                     break;

       }

     }

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

   void move(int x, int y)

     {

     switch(mMode)

       {

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

                     break;

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

                     break;

       case SHEAR:   vShear[0].set( (float)x/textureWidth, (float)(-y)/textureHeight, 0);

                     break;

       }

     }

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

   void up()

     {

     stretchEffects.abortById(mLastEffect);

     float damp = -0.65f;

     switch(mMode)

       {

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

                       {

                       vDistort[i].set( vDistort[i-1].get1()*damp, vDistort[i-1].get2()*damp, 0 );

                       }

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

                     stretchEffects.apply(mReleasedDistort);

                     break;

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

                       {

                       vDeform[i].set( vDeform[i-1].get1()*damp, vDeform[i-1].get2()*damp, 0 );

                       }

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

                     stretchEffects.apply(mReleasedDeform);

                     break;

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

                       {

                       vShear[i].set( vShear[i-1].get1()*damp, vShear[i-1].get2()*damp, 0 );

                       }

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

                     stretchEffects.apply(mReleasedShear);

                     break;

       }

     }

   }