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.projection;

import javax.microedition.khronos.egl.EGLConfig;

import javax.microedition.khronos.opengles.GL10;

import org.distorted.library.effect.MatrixEffectScale;

import org.distorted.library.effect.VertexEffectDeform;

import org.distorted.library.main.DistortedLibrary;

import org.distorted.library.main.DistortedEffects;

import org.distorted.library.main.DistortedScreen;

import org.distorted.library.mesh.MeshRectangles;

import org.distorted.library.main.DistortedTexture;

import org.distorted.library.type.Static1D;

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 ProjectionRenderer implements GLSurfaceView.Renderer, DistortedLibrary.ExceptionListener

{

   private GLSurfaceView mView;

   private DistortedEffects mEffects;

   private DistortedScreen mScreen;

   private MeshRectangles mMesh;

   private DistortedTexture mTexture;

   private float mF, mNear;

   private Static3D mScale;

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

   ProjectionRenderer(GLSurfaceView view)

      { 

      mView   = view;

      mEffects= new DistortedEffects();

      mScreen = new DistortedScreen();

      Static3D point1 = new Static3D(  0.25f,   0.25f, 0);

      Static3D point2 = new Static3D( -0.25f,   0.25f, 0);

      Static3D point3 = new Static3D(  0.25f,  -0.25f, 0);

      Static3D point4 = new Static3D( -0.25f,  -0.25f, 0);

      Static4D region = new Static4D( 0, 0, 0, 0.25f);

      Static3D vector = new Static3D( 0, 0, 0.25f);

      Static1D deformRadius = new Static1D(1);

      mScale = new Static3D(1,1,1);

      mEffects.apply( new MatrixEffectScale(mScale) );

      mEffects.apply( new VertexEffectDeform(vector, deformRadius, point1, region) );

      mEffects.apply( new VertexEffectDeform(vector, deformRadius, point2, region) );

      mEffects.apply( new VertexEffectDeform(vector, deformRadius, point3, region) );

      mEffects.apply( new VertexEffectDeform(vector, deformRadius, point4, region) );

      mTexture= new DistortedTexture();

      }

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

   float setFOV(int f)

      {

      mF = f;

      mScreen.setProjection(mF,mNear);

      return mF;

      }

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

   float setNear(int near)

      {

      mNear = near/100.0f;

      mScreen.setProjection(mF,mNear);

      return mNear;

      }

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

   public void onDrawFrame(GL10 glUnused) 

      {

      mScreen.render( System.currentTimeMillis() );

      }

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

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

      {

      mScreen.setProjection(mF,mNear);

      Paint paint = new Paint();

      Bitmap bmp  = Bitmap.createBitmap(width,height, Bitmap.Config.ARGB_8888);

      Canvas bmpCanvas = new Canvas(bmp);

      paint.setColor(0xff008800);

      paint.setStyle(Style.FILL);

      bmpCanvas.drawRect(0, 0, width, height, paint);

      paint.setColor(0xffffffff);

      final int NUMLINES = 10;

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

        {

        bmpCanvas.drawRect(width*i/NUMLINES-1,                   0, width*i/NUMLINES+1, height             , paint);

        bmpCanvas.drawRect(                 0, height*i/NUMLINES-1, width             , height*i/NUMLINES+1, paint);

        }

      mScale.set(width,height,width);

      mTexture.setTexture(bmp);

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

      mMesh = new MeshRectangles(100,100*height/width);

      mScreen.detachAll();

      mScreen.attach(mTexture,mEffects,mMesh);

      mScreen.resize(width, height);

      }

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

   public void onSurfaceCreated(GL10 glUnused, EGLConfig config) 

      {

      VertexEffectDeform.enable();

      DistortedLibrary.onCreate(mView.getContext(), this);

      }

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

    public void distortedException(Exception ex)

      {

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

      }

}