Distorted Android

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// 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.meshjoin;

import android.graphics.Bitmap;

import android.graphics.BitmapFactory;

import android.graphics.Canvas;

import android.graphics.Paint;

import android.opengl.GLSurfaceView;

import org.distorted.examples.R;

import org.distorted.library.effect.MatrixEffect;

import org.distorted.library.effect.MatrixEffectMove;

import org.distorted.library.effect.MatrixEffectQuaternion;

import org.distorted.library.effect.MatrixEffectRotate;

import org.distorted.library.effect.MatrixEffectScale;

import org.distorted.library.effect.VertexEffectSink;

import org.distorted.library.main.DistortedEffects;

import org.distorted.library.main.DistortedLibrary;

import org.distorted.library.main.DistortedScreen;

import org.distorted.library.main.DistortedTexture;

import org.distorted.library.mesh.MeshBase;

import org.distorted.library.mesh.MeshJoined;

import org.distorted.library.mesh.MeshTriangles;

import org.distorted.library.type.Dynamic1D;

import org.distorted.library.type.DynamicQuat;

import org.distorted.library.type.Static1D;

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 MeshJoinRenderer implements GLSurfaceView.Renderer

{

    private GLSurfaceView mView;

    private DistortedTexture mTexture;

    private DistortedScreen mScreen;

    private DistortedEffects mEffects;

    private Static3D mScale;

    private MeshBase mMesh;

    Static4D mQuat1, mQuat2;

    int mScreenMin;

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

    MeshJoinRenderer(GLSurfaceView v)

      {

      mView = v;

      mScreen = new DistortedScreen();

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

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

      Dynamic1D sink = new Dynamic1D(5000,0.0f);

      sink.add( new Static1D(0.5f) );

      sink.add( new Static1D(2.0f) );

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

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

      DynamicQuat quatInt1 = new DynamicQuat(0,0.5f);

      DynamicQuat quatInt2 = new DynamicQuat(0,0.5f);

      quatInt1.add(mQuat1);

      quatInt2.add(mQuat2);

      mEffects = new DistortedEffects();

      mEffects.apply( new MatrixEffectQuaternion(quatInt2, center) );

      mEffects.apply( new MatrixEffectQuaternion(quatInt1, center) );

      mEffects.apply( new MatrixEffectScale(mScale));

      mEffects.apply( new VertexEffectSink( sink, center, new Static4D(0,0,0,0.75f) ) );

      mScreen.glClearColor(1.0f, 1.0f, 1.0f, 1.0f);

      }

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

    public void onDrawFrame(GL10 glUnused) 

      {

      mScreen.render( System.currentTimeMillis() );

      }

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

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

      {

      final float SCALE = 0.7f;

      mScreenMin = width<height ? width:height;

      float factor = SCALE*mScreenMin;

      mScale.set(factor,factor,factor);

      mScreen.resize(width, height);

      }

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

    public void onSurfaceCreated(GL10 glUnused, EGLConfig config) 

      {

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

      Bitmap bitmap;

      try

        {

        bitmap = BitmapFactory.decodeStream(is);

        }

      finally

        {

        try

          {

          is.close();

          }

        catch(IOException e) { }

        }

      if( mTexture==null ) mTexture = new DistortedTexture();

      mTexture.setTexture( createTetrahedronTexture(bitmap) );

      if( mMesh==null ) mMesh = createJoinedTetrahedron();

      //mMesh.setShowNormals(true);

      mScreen.detachAll();

      mScreen.attach(mTexture,mEffects,mMesh);

      VertexEffectSink.enable();

      try

        {

        DistortedLibrary.onCreate(mView.getContext());

        }

      catch(Exception ex)

        {

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

        }

      }

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

    private Bitmap createTetrahedronTexture(Bitmap input)

      {

      final int[] FACE_COLORS = new int[] { 0xffffff00, 0xff00ff00, 0xff0000ff, 0xffff0000 };

      final int FACES=FACE_COLORS.length;

      int height = input.getHeight();

      Bitmap result = Bitmap.createBitmap(FACES*height,height, Bitmap.Config.ARGB_8888);

      Canvas canvas = new Canvas(result);

      Paint paint = new Paint();

      paint.setStyle(Paint.Style.FILL);

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

        {

        paint.setColor(FACE_COLORS[i]);

        canvas.drawRect(i*height,0,(i+1)*height,height,paint);

        canvas.drawBitmap(input,i*height,0,null);

        }

      return result;

      }

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

    private MeshBase createJoinedTetrahedron()

      {

      final float SQ3 = (float)Math.sqrt(3);

      final float angleFaces = (float)((180/Math.PI)*(2*Math.asin(SQ3/3))); // angle between two faces of a tetrahedron

      final int MESHES=4;

      MeshBase[] meshes = new MeshTriangles[MESHES];

      for(int i=0; i<MESHES; i++) meshes[i] = new MeshTriangles(10);

      MatrixEffect[] effects0 = new MatrixEffect[3];

      effects0[0] = new MatrixEffectScale( new Static3D(1,SQ3/2,1) );

      effects0[1] = new MatrixEffectRotate( new Static1D(90), new Static3D(1,0,0), new Static3D(0,0,0) );

      effects0[2] = new MatrixEffectMove( new Static3D(0,-SQ3/6,SQ3/12) );

      meshes[0].apply(effects0);

      Static1D angle = new Static1D(angleFaces);

      Static3D axis  = new Static3D(-1,0,0);

      Static3D center= new Static3D(0,-SQ3/6,-SQ3/6);

      MatrixEffect[] effects1 = new MatrixEffect[5];

      effects1[0] = effects0[0];

      effects1[1] = effects0[1];

      effects1[2] = effects0[2];

      effects1[3] = new MatrixEffectRotate( new Static1D(180), new Static3D(0,0,1), center );

      effects1[4] = new MatrixEffectRotate( angle, axis, center );

      meshes[1].apply(effects1);

      axis.set(0.5f,0,-SQ3/2);

      center.set2(SQ3/3);

      meshes[2].apply(effects1);

      axis.set2(SQ3/2);

      meshes[3].apply(effects1);

      Static4D[] textureMaps = new Static4D[MESHES];

      for(int i=0; i<MESHES; i++) textureMaps[i] = new Static4D(i*0.25f,0.0f,0.25f,0.866f);

      MeshBase result = new MeshJoined(meshes);

      result.setTextureMap(textureMaps);

      return result;

      }

}