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.effects3d;

import android.graphics.Bitmap;

import android.graphics.BitmapFactory;

import android.opengl.GLES30;

import android.opengl.GLSurfaceView;

import org.distorted.examples.R;

import org.distorted.library.Distorted;

import org.distorted.library.DistortedEffects;

import org.distorted.library.DistortedNode;

import org.distorted.library.DistortedScreen;

import org.distorted.library.DistortedTexture;

import org.distorted.library.EffectNames;

import org.distorted.library.MeshFlat;

import org.distorted.library.MeshObject;

import org.distorted.library.EffectTypes;

import org.distorted.library.type.Dynamic3D;

import org.distorted.library.type.DynamicQuat;

import org.distorted.library.type.Static3D;

import org.distorted.library.type.Static4D;

import java.io.IOException;

import java.io.InputStream;

import javax.microedition.khronos.egl.EGLConfig;

import javax.microedition.khronos.opengles.GL10;

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

class Effects3DRenderer implements GLSurfaceView.Renderer

{

    private static final float FOV = 70.0f;

    private static final float NEAR = 0.1f;

    private GLSurfaceView mView;

    private DistortedTexture mObjectTexture, mBackgroundTexture, mCenterTexture, mRegionTexture;

    private DistortedEffects mObjectEffects, mBackgroundEffects, mCenterEffects, mRegionEffects;

    private DistortedScreen mScreen;

    private DistortedNode mCenterNode, mRegionNode;

    private int mObjWidth, mObjHeight, mObjDepth;

    private DynamicQuat mQuatInt1, mQuatInt2;

    private Dynamic3D mCenterInter, mRegionInter;

    private Static3D mCenterPoint, mRegionPoint;

    private Dynamic3D mRegionScaleInter;

    private Static3D mRegionScalePoint;

    private float mFactorObj, mFactorReg;

    Static4D mQuat1, mQuat2;

    int mScreenMin;

    private boolean mShowing=false;

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

    Effects3DRenderer(GLSurfaceView v)

      {

      mView = v;

      Effects3DActivity act = (Effects3DActivity)v.getContext();

      mObjectTexture     = act.getTexture();

      mObjectEffects     = act.getEffects();

      mBackgroundTexture = new DistortedTexture(100,100);

      mCenterTexture     = new DistortedTexture(100,100);

      mRegionTexture     = new DistortedTexture(100,100);

      mBackgroundEffects = new DistortedEffects();

      mCenterEffects     = new DistortedEffects();

      mRegionEffects     = new DistortedEffects();

      MeshObject meshO   = act.getMesh();

      MeshFlat quad      = new MeshFlat(1,1);

      mObjWidth = mObjectTexture.getWidth();

      mObjHeight= mObjectTexture.getHeight();

      mObjDepth = mObjectTexture.getDepth(meshO);

      mQuat1 = new Static4D(0,0,0,1);  // unity

      mQuat2 = new Static4D(0,0,0,1);  // quaternions

      mQuatInt1 = new DynamicQuat(0,0.5f);

      mQuatInt2 = new DynamicQuat(0,0.5f);

      mQuatInt1.add(mQuat1);

      mQuatInt2.add(mQuat2);

      mCenterInter= new Dynamic3D();

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

      mCenterInter.add(mCenterPoint);

      mRegionInter= new Dynamic3D();

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

      mRegionInter.add(mRegionPoint);

      mRegionScaleInter = new Dynamic3D();

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

      mRegionScaleInter.add(mRegionScalePoint);

      mCenterNode = new DistortedNode(mCenterTexture, mCenterEffects, quad);

      mRegionNode = new DistortedNode(mRegionTexture, mRegionEffects, quad);

      mScreen = new DistortedScreen();

      mScreen.setProjection(FOV, NEAR);

      mScreen.attach(mBackgroundTexture, mBackgroundEffects, quad );

      mScreen.attach(mObjectTexture    , mObjectEffects    , meshO);

      }

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

    void showRegionAndCenter(boolean show)

      {

      if( mShowing!=show )

        {

        if( show )

          {

          mScreen.attach(mCenterNode);

          mScreen.attach(mRegionNode);

          }

        else

          {

          mScreen.detach(mCenterNode);

          mScreen.detach(mRegionNode);

          }

        mShowing = show;

        }

      }

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

    void setCenter(float x, float y, float z)

      {

      mCenterPoint.set(mFactorObj*x,mFactorObj*y,mFactorObj*z);

      }

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

    void setRegion(float x, float y, float r)

      {

      mFactorReg = 2*mFactorObj*r/mRegionTexture.getWidth();

      mRegionPoint.set(mFactorObj*x,mFactorObj*y,0);

      mRegionScalePoint.set(mFactorReg,mFactorReg,mFactorReg);

      }

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

    public void onDrawFrame(GL10 glUnused)

      {

      GLES30.glClear( GLES30.GL_DEPTH_BUFFER_BIT | GLES30.GL_COLOR_BUFFER_BIT);

      mScreen.render(System.currentTimeMillis());

      }

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

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

      {

      mScreenMin = width<height ? width:height;

      mObjectEffects.abortEffects(EffectTypes.MATRIX);

      mBackgroundEffects.abortEffects(EffectTypes.MATRIX);

      mCenterEffects.abortEffects(EffectTypes.MATRIX);

      mRegionEffects.abortEffects(EffectTypes.MATRIX);

      float factorCen;

      int centerSize = mCenterTexture.getWidth();

      int regionSize = mRegionTexture.getWidth();

      if( width*mObjHeight > height*mObjWidth ) // screen is more 'horizontal' than the Object

        {

        mFactorObj = (0.80f*height)/mObjHeight;

        factorCen  = (0.08f*height)/centerSize;

        }

      else

        {

        mFactorObj = (0.80f*width)/mObjWidth;

        factorCen  = (0.08f*width)/centerSize;

        }

      Effects3DActivity act = (Effects3DActivity)mView.getContext();

      mCenterPoint.set(mFactorObj*act.getCenterX(),mFactorObj*act.getCenterY(),0);

      mRegionPoint.set(mFactorObj*act.getRegionX(),mFactorObj*act.getRegionY(),0);

      mFactorReg = 2*mFactorObj*act.getRegionR()/regionSize;

      mRegionScalePoint.set(mFactorReg,mFactorReg,mFactorReg);

      Static3D rotateObj = new Static3D(mObjWidth/2,mObjHeight/2, 0);

      mObjectEffects.move( new Static3D( (width-mFactorObj*mObjWidth)/2 , (height-mFactorObj*mObjHeight)/2 , 0) );

      mObjectEffects.scale(mFactorObj);

      mObjectEffects.quaternion(mQuatInt1, rotateObj);

      mObjectEffects.quaternion(mQuatInt2, rotateObj);

      Static3D rotateCen = new Static3D(width/2,height/2, 0);

      mCenterEffects.quaternion(mQuatInt1, rotateCen);

      mCenterEffects.quaternion(mQuatInt2, rotateCen);

      mCenterEffects.move( new Static3D( (width -factorCen*centerSize-mFactorObj*mObjWidth )/2 ,

                                  (height-factorCen*centerSize-mFactorObj*mObjHeight)/2 , mFactorObj*mObjDepth/2+10) );

      mCenterEffects.move(mCenterInter);

      mCenterEffects.scale(factorCen);

      mRegionEffects.quaternion(mQuatInt1, rotateCen);

      mRegionEffects.quaternion(mQuatInt2, rotateCen);

      mRegionEffects.move( new Static3D( (width -mFactorObj*mObjWidth )/2 ,

                                  (height-mFactorObj*mObjHeight)/2 , mFactorObj*mObjDepth/2+12) );

      mRegionEffects.move(mCenterInter);

      mRegionEffects.move(mRegionInter);

      mRegionEffects.scale(mRegionScaleInter);

      mRegionEffects.move( new Static3D( -regionSize/2 , -regionSize/2 , 0) );

      int backgroundSize = mBackgroundTexture.getWidth();

      float factorBackX = ((float)width)/backgroundSize;

      float factorBackY = ((float)height)/backgroundSize;

      // quite tricky: move the background exactly to the FAR plane! (see DistortedOutputSurface.setProjection() )

      mBackgroundEffects.move(new Static3D( -width/2, -height/2, -height*(1.0f-NEAR)/(2.0f*(float)Math.tan(FOV*Math.PI/360))) );

      mBackgroundEffects.scale(new Static3D(2*factorBackX, 2*factorBackY, 1.0f) );

      mScreen.resize(width, height);

      }

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

    public void onSurfaceCreated(GL10 glUnused, EGLConfig config)

      {

      GLES30.glClearColor(0.0f, 0.0f, 0.0f, 1.0f);

      Effects3DActivity act = (Effects3DActivity)mView.getContext();

      InputStream isB = act.getResources().openRawResource(R.raw.water);

      InputStream isC = act.getResources().openRawResource(R.raw.center);

      InputStream isR = act.getResources().openRawResource(R.raw.region);

      Bitmap bitmapB,bitmapC,bitmapR;

      try 

        {

        bitmapB = BitmapFactory.decodeStream(isB);

        bitmapC = BitmapFactory.decodeStream(isC);

        bitmapR = BitmapFactory.decodeStream(isR);

        }

      finally 

        {

        try 

          {

          isB.close();

          isC.close();

          isR.close();

          }

        catch(IOException e) { }

        }  

      mObjectTexture.setTexture( act.getBitmap() );

      mBackgroundTexture.setTexture(bitmapB);

      mCenterTexture.setTexture(bitmapC);

      mRegionTexture.setTexture(bitmapR);

      EffectTypes type;

      for( EffectNames name : EffectNames.values() )

        {

        type = name.getType();

        if( type== EffectTypes.VERTEX || type==EffectTypes.FRAGMENT )

          {

          DistortedEffects.enableEffect(name);

          }

        }

      try

        {

        Distorted.onCreate(mView.getContext());

        }

      catch(Exception ex)

        {

        android.util.Log.e("Effects3D", ex.getMessage() );

        }

      }

}