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.cubes;

import java.io.IOException;

import java.io.InputStream;

import javax.microedition.khronos.egl.EGLConfig;

import javax.microedition.khronos.opengles.GL10;

import org.distorted.examples.R;

import org.distorted.library.DistortedObject;

import org.distorted.library.GridObject;

import org.distorted.library.EffectTypes;

import org.distorted.library.type.DynamicQuat;

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 CubesRenderer implements GLSurfaceView.Renderer 

{

    private GLSurfaceView mView;

    private DistortedObject mObject;

    private GridObject mGrid;

    private int mObjWidth, mObjHeight;

    private DynamicQuat mQuatInt1, mQuatInt2;

    Static4D mQuat1, mQuat2;

    int mScreenMin;

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

    CubesRenderer(GLSurfaceView v)

      {

      mView = v;

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

      mObject = act.getObject();

      mGrid   = act.getGrid();

      mObjWidth = mObject.getWidth();

      mObjHeight= mObject.getHeight();

      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);

      }

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

    public void onDrawFrame(GL10 glUnused) 

      {

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

      mObject.draw(System.currentTimeMillis(),mGrid);

      }

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

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

      {

      mScreenMin = width<height ? width:height;

      mObject.abortEffects(EffectTypes.MATRIX);

      float factor;

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

        {

        factor = (0.8f*height)/mObjHeight;

        }

      else

        {

        factor = (0.8f*width)/mObjWidth;

        }

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

      mObject.scale(factor);

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

      mObject.quaternion(mQuatInt1, center);

      mObject.quaternion(mQuatInt2, center);

      Distorted.onSurfaceChanged(width, height); 

      }

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

    public void onSurfaceCreated(GL10 glUnused, EGLConfig config) 

      {

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

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

      Bitmap bitmap;

      try 

        {

        bitmap = BitmapFactory.decodeStream(is);

        } 

      finally 

        {

        try 

          {

          is.close();

          } 

        catch(IOException e) { }

        }  

      mObject.setTexture(bitmap);

      try

        {

        Distorted.onSurfaceCreated(mView.getContext());

        }

      catch(Exception ex)

        {

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

        }

      }

}