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.earth;

import android.graphics.Bitmap;

import android.graphics.BitmapFactory;

import android.opengl.GLSurfaceView;

import org.distorted.examples.R;

import org.distorted.library.effect.Effect;

import org.distorted.library.effect.EffectName;

import org.distorted.library.effect.EffectType;

import org.distorted.library.effect.FragmentEffectAlpha;

import org.distorted.library.effect.FragmentEffectBrightness;

import org.distorted.library.effect.FragmentEffectChroma;

import org.distorted.library.effect.FragmentEffectContrast;

import org.distorted.library.effect.FragmentEffectSaturation;

import org.distorted.library.effect.MatrixEffectMove;

import org.distorted.library.effect.MatrixEffectQuaternion;

import org.distorted.library.effect.MatrixEffectScale;

import org.distorted.library.effect.VertexEffectDeform;

import org.distorted.library.effect.VertexEffectDistort;

import org.distorted.library.effect.VertexEffectPinch;

import org.distorted.library.effect.VertexEffectSink;

import org.distorted.library.effect.VertexEffectSwirl;

import org.distorted.library.effect.VertexEffectWave;

import org.distorted.library.main.DistortedLibrary;

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.MeshSphere;

import org.distorted.library.type.Dynamic3D;

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 org.distorted.library.type.Static5D;

import java.io.IOException;

import java.io.InputStream;

import javax.microedition.khronos.egl.EGLConfig;

import javax.microedition.khronos.opengles.GL10;

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

class EarthRenderer implements GLSurfaceView.Renderer, DistortedLibrary.ExceptionListener

{

    private static final float RADIUS_V= 1.0f/ 8;

    private static final float RADIUS_F= 1.0f/15;

    private static final int   LEVEL   =      40;

    private static final float FOV     =   30.0f;

    private static final float NEAR    =    0.1f;

    private static final int   MAX_EFF =      20;

    private static final float SCALE   =   1.10f;

    private GLSurfaceView mView;

    private DistortedTexture mTexture;

    private DistortedEffects mEffects;

    private MeshBase mMesh;

    private DistortedScreen mScreen;

    private float mObjWidth, mObjHeight, mObjDepth;

    private Static3D mMove, mScaleFactor;

    private int mScrWidth, mScrHeight;

    private float mLevel;

    private Static3D mColor;

    private Static3D mRegionF;

    private Static4D mRegionV;

    private Static1D mStrength;

    private Static3D mPinch;

    private Static1D mSwirl;

    Static4D mQuat1, mQuat2;

    int mScreenMin;

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

    EarthRenderer(GLSurfaceView v)

      {

      mView = v;

      mLevel = SCALE;

      mStrength   = new Static1D(0.5f);

      mColor      = new Static3D(255,0,0);

      mRegionF    = new Static3D(RADIUS_F,RADIUS_F,RADIUS_F);

      mRegionV    = new Static4D(0,0,0,RADIUS_V);

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

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

      mPinch      = new Static3D(0.5f,0.0f,0.0f);

      mSwirl      = new Static1D(45.0f);

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

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

      scale.add(mScaleFactor);

      mMesh     = new MeshSphere(LEVEL);

      mTexture  = new DistortedTexture();

      mObjWidth = mObjHeight = mObjDepth = 1.0f;

      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(scale));

      mEffects.apply( new MatrixEffectMove(mMove) );

      mScreen = new DistortedScreen();

      mScreen.setProjection(FOV, NEAR);

      }

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

    public void onDrawFrame(GL10 glUnused) 

      {

      mScreen.render( System.currentTimeMillis() );

      }

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

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

      {

      mScrWidth = width;

      mScrHeight= height;

      mScreenMin= Math.min(width, height);

      adjustFactor();

      mScreen.resize(width, height);

      }

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

    void setLevel(int level)

      {

      final float N=2.0f;

      // MAP: 0--> SCALE/N   50-->SCALE   100->SCALE*N

      mLevel = SCALE* (1.0f+  (level>=50 ? N-1 : (N-1)/N) * (level-50)/50.0f);

      adjustFactor();

      }

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

    private void adjustFactor()

      {

      float xW = (float)mScrWidth /mObjWidth;

      float xH = (float)mScrHeight/mObjHeight;

      float factor = xW>xH ? mLevel*xH : mLevel*xW;

      mMove.set( 0, 0, -factor*mObjDepth );

      mScaleFactor.set(factor,factor,factor);

      }

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

    void addNewPoint(float longitude, float latitude, EffectName name)

      {

      final float CORR = 10.0F;

      Static3D vector;

      Effect effect =null;

      double sinLON = Math.sin(longitude);

      double cosLON = Math.cos(longitude);

      double sinLAT = Math.sin(latitude);

      double cosLAT = Math.cos(latitude);

      float x = (float)(sinLON*cosLAT)/2.0f;

      float y = (float)        sinLAT /2.0f;

      float z = (float)(cosLON*cosLAT)/2.0f;

      Static3D center = new Static3D( (x)*mObjWidth, (y)*mObjHeight, (z)*mObjDepth);

      switch(name)

        {

        case DISTORT          : vector = new Static3D( +x*mObjWidth/CORR, +y*mObjHeight/CORR, +z*mObjDepth/CORR);

                                effect = new VertexEffectDistort(   vector, center, mRegionV); break;

        case DEFORM           : vector = new Static3D( +x*mObjWidth/CORR, +y*mObjHeight/CORR, +z*mObjDepth/CORR);

                                Static1D radius = new Static1D(mObjWidth/2);

                                effect = new VertexEffectDeform (   vector, radius, center, mRegionV); break;

        case SINK             : effect = new VertexEffectSink   (mStrength, center, mRegionV); break;

        case PINCH            : float lat = latitude>0 ? (float)(-Math.PI/2 + latitude) : (float)(Math.PI/2 + latitude);

                                float lon = longitude;

                                float latInDegrees = (float)(lat*180.0f/Math.PI);

                                float lonInDegrees = (float)(lon*180.0f/Math.PI);

                                mPinch.set1(latInDegrees);

                                mPinch.set2(lonInDegrees);

                                effect = new VertexEffectPinch  (mPinch   , center, mRegionV); break;

        case SWIRL            : effect = new VertexEffectSwirl  (mSwirl   , center, mRegionV); break;      // SWIRL & WAVE are not really fully

        case WAVE             : Static5D wave = new Static5D( RADIUS_V/2, RADIUS_V/2, 0, 90-latitude, 90); // 3D effects. They will not look

                                effect = new VertexEffectWave   (wave     , center, mRegionV); break;      // good everywhere on the sphere.

        case ALPHA            : effect = new FragmentEffectAlpha     (mStrength,        center, mRegionF, false); break;

        case SMOOTH_ALPHA     : effect = new FragmentEffectAlpha     (mStrength,        center, mRegionF, true ); break;

        case CHROMA           : effect = new FragmentEffectChroma    (mStrength, mColor,center, mRegionF, false); break;

        case SMOOTH_CHROMA    : effect = new FragmentEffectChroma    (mStrength, mColor,center, mRegionF, true ); break;

        case BRIGHTNESS       : effect = new FragmentEffectBrightness(mStrength,        center, mRegionF, false); break;

        case SMOOTH_BRIGHTNESS: effect = new FragmentEffectBrightness(mStrength,        center, mRegionF, true ); break;

        case SATURATION       : effect = new FragmentEffectSaturation(mStrength,        center, mRegionF, false); break;

        case SMOOTH_SATURATION: effect = new FragmentEffectSaturation(mStrength,        center, mRegionF, true ); break;

        case CONTRAST         : effect = new FragmentEffectContrast  (mStrength,        center, mRegionF, false); break;

        case SMOOTH_CONTRAST  : effect = new FragmentEffectContrast  (mStrength,        center, mRegionF, true ); break;

        default               : android.util.Log.e("EarthRenderer", "unexpected effect: "+name.toString() );

        }

      if( effect!=null )

        {

        mEffects.apply(effect);

        }

      }

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

    void removeAll()

      {

      mEffects.abortByType(EffectType.VERTEX);

      mEffects.abortByType(EffectType.FRAGMENT);

      }

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

    public void onSurfaceCreated(GL10 glUnused, EGLConfig config) 

      {

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

      Bitmap bitmap;

      try

        {

        bitmap = BitmapFactory.decodeStream(is);

        }

      finally

        {

        try

          {

          is.close();

          }

        catch(IOException e) { }

        }

      mTexture.setTexture(bitmap);

      mScreen.detachAll();

      mScreen.attach(mTexture,mEffects,mMesh);

      Effect.enableEffects(EffectType.FRAGMENT);

      Effect.enableEffects(EffectType.VERTEX);

      DistortedLibrary.setMax(EffectType.VERTEX  , MAX_EFF);

      DistortedLibrary.setMax(EffectType.FRAGMENT, MAX_EFF);

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

      }

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

    public void distortedException(Exception ex)

      {

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

      }

}