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examples / src / main / java / org / distorted / examples / earth / EarthRenderer.java @ e50f49b6

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///////////////////////////////////////////////////////////////////////////////////////////////////
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// Copyright 2016 Leszek Koltunski                                                               //
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//                                                                                               //
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// This file is part of Distorted.                                                               //
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//                                                                                               //
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// Distorted is free software: you can redistribute it and/or modify                             //
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// it under the terms of the GNU General Public License as published by                          //
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// the Free Software Foundation, either version 2 of the License, or                             //
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// (at your option) any later version.                                                           //
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//                                                                                               //
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// Distorted is distributed in the hope that it will be useful,                                  //
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// but WITHOUT ANY WARRANTY; without even the implied warranty of                                //
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the                                 //
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// GNU General Public License for more details.                                                  //
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//                                                                                               //
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// You should have received a copy of the GNU General Public License                             //
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// along with Distorted.  If not, see <http://www.gnu.org/licenses/>.                            //
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///////////////////////////////////////////////////////////////////////////////////////////////////
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package org.distorted.examples.earth;
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import android.graphics.Bitmap;
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import android.graphics.BitmapFactory;
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import android.opengl.GLSurfaceView;
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import org.distorted.examples.R;
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import org.distorted.library.effect.Effect;
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import org.distorted.library.effect.EffectName;
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import org.distorted.library.effect.EffectType;
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import org.distorted.library.effect.FragmentEffectAlpha;
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import org.distorted.library.effect.FragmentEffectBrightness;
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import org.distorted.library.effect.FragmentEffectChroma;
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import org.distorted.library.effect.FragmentEffectContrast;
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import org.distorted.library.effect.FragmentEffectSaturation;
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import org.distorted.library.effect.MatrixEffectMove;
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import org.distorted.library.effect.MatrixEffectQuaternion;
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import org.distorted.library.effect.MatrixEffectScale;
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import org.distorted.library.effect.VertexEffectDeform;
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import org.distorted.library.effect.VertexEffectDistort;
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import org.distorted.library.effect.VertexEffectPinch;
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import org.distorted.library.effect.VertexEffectSink;
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import org.distorted.library.effect.VertexEffectSwirl;
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import org.distorted.library.effect.VertexEffectWave;
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import org.distorted.library.main.DistortedLibrary;
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import org.distorted.library.main.DistortedEffects;
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import org.distorted.library.main.DistortedScreen;
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import org.distorted.library.main.DistortedTexture;
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import org.distorted.library.mesh.MeshBase;
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import org.distorted.library.mesh.MeshSphere;
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import org.distorted.library.type.Dynamic3D;
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import org.distorted.library.type.DynamicQuat;
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import org.distorted.library.type.Static1D;
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import org.distorted.library.type.Static3D;
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import org.distorted.library.type.Static4D;
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import org.distorted.library.type.Static5D;
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import java.io.IOException;
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import java.io.InputStream;
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import javax.microedition.khronos.egl.EGLConfig;
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import javax.microedition.khronos.opengles.GL10;
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///////////////////////////////////////////////////////////////////////////////////////////////////
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class EarthRenderer implements GLSurfaceView.Renderer
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{
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    private static final int   SIZE    =     500;
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    private static final int   RADIUS_V= SIZE/ 8;
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    private static final int   RADIUS_F= SIZE/15;
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    private static final int   LEVEL   =      40;
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    private static final float FOV     =   30.0f;
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    private static final float NEAR    =    0.1f;
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    private static final int   MAX_EFF =      20;
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    private static final float SCALE   =   1.10f;
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    private GLSurfaceView mView;
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    private DistortedTexture mTexture;
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    private DistortedEffects mEffects;
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    private MeshBase mMesh;
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    private DistortedScreen mScreen;
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    private int mObjWidth, mObjHeight, mObjDepth;
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    private Static3D mMove, mScaleFactor;
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    private int mScrWidth, mScrHeight;
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    private float mLevel;
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    private Static3D mColor;
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    private Static3D mRegionF;
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    private Static4D mRegionV;
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    private Static1D mStrength;
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    private Static3D mPinch;
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    private Static1D mSwirl;
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    Static4D mQuat1, mQuat2;
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    int mScreenMin;
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///////////////////////////////////////////////////////////////////////////////////////////////////
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    EarthRenderer(GLSurfaceView v)
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      {
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      mView = v;
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      mLevel = SCALE;
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      mStrength   = new Static1D(0.5f);
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      mColor      = new Static3D(255,0,0);
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      mRegionF    = new Static3D(RADIUS_F,RADIUS_F,RADIUS_F);
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      mRegionV    = new Static4D(0,0,0,RADIUS_V);
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      mMove       = new Static3D(0,0,0);
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      mScaleFactor= new Static3D(1,1,1);
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      mPinch      = new Static3D(0.5f,0.0f,0.0f);
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      mSwirl      = new Static1D(45.0f);
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      Static3D center = new Static3D(0,0,0);
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      Dynamic3D scale = new Dynamic3D(0,0.5f);
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      scale.add(mScaleFactor);
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      mMesh     = new MeshSphere(LEVEL);
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      mMesh.setStretch(SIZE,SIZE,SIZE);
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      mTexture  = new DistortedTexture();
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      mObjWidth = mObjHeight = mObjDepth = SIZE;
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      mQuat1 = new Static4D(0,0,0,1);  // unity
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      mQuat2 = new Static4D(0,0,0,1);  // quaternions
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      DynamicQuat quatInt1 = new DynamicQuat(0,0.5f);
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      DynamicQuat quatInt2 = new DynamicQuat(0,0.5f);
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      quatInt1.add(mQuat1);
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      quatInt2.add(mQuat2);
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      mEffects = new DistortedEffects();
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      mEffects.apply( new MatrixEffectQuaternion(quatInt2, center) );
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      mEffects.apply( new MatrixEffectQuaternion(quatInt1, center) );
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      mEffects.apply( new MatrixEffectScale(scale));
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      mEffects.apply( new MatrixEffectMove(mMove) );
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      mScreen = new DistortedScreen();
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      mScreen.setProjection(FOV, NEAR);
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      }
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///////////////////////////////////////////////////////////////////////////////////////////////////
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    public void onDrawFrame(GL10 glUnused) 
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      {
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      mScreen.render( System.currentTimeMillis() );
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      }
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///////////////////////////////////////////////////////////////////////////////////////////////////
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    public void onSurfaceChanged(GL10 glUnused, int width, int height) 
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      {
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      mScrWidth = width;
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      mScrHeight= height;
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      mScreenMin= width<height ? width:height;
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      adjustFactor();
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      mScreen.resize(width, height);
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      }
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///////////////////////////////////////////////////////////////////////////////////////////////////
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    void setLevel(int level)
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      {
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      final float N=2.0f;
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      // MAP: 0--> SCALE/N   50-->SCALE   100->SCALE*N
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      mLevel = SCALE* (1.0f+  (level>=50 ? N-1 : (N-1)/N) * (level-50)/50.0f);
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      adjustFactor();
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      }
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///////////////////////////////////////////////////////////////////////////////////////////////////
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    private void adjustFactor()
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      {
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      float xW = (float)mScrWidth /mObjWidth;
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      float xH = (float)mScrHeight/mObjHeight;
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      float factor = xW>xH ? mLevel*xH : mLevel*xW;
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      mMove.set( 0, 0, -factor*mObjDepth );
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      mScaleFactor.set(factor,factor,factor);
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      }
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///////////////////////////////////////////////////////////////////////////////////////////////////
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    void addNewPoint(float longitude, float latitude, EffectName name)
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      {
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      final float CORR = 10.0F;
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      Static3D vector;
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      Effect effect =null;
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      double sinLON = Math.sin(longitude);
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      double cosLON = Math.cos(longitude);
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      double sinLAT = Math.sin(latitude);
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      double cosLAT = Math.cos(latitude);
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      float x = (float)(sinLON*cosLAT)/2.0f;
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      float y = (float)        sinLAT /2.0f;
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      float z = (float)(cosLON*cosLAT)/2.0f;
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      Static3D center = new Static3D( (x)*mObjWidth, (y)*mObjHeight, (z)*mObjDepth);
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      switch(name)
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        {
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        case DISTORT          : vector = new Static3D( +x*mObjWidth/CORR, +y*mObjHeight/CORR, +z*mObjDepth/CORR);
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                                effect = new VertexEffectDistort(   vector, center, mRegionV); break;
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        case DEFORM           : vector = new Static3D( +x*mObjWidth/CORR, +y*mObjHeight/CORR, +z*mObjDepth/CORR);
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                                effect = new VertexEffectDeform (   vector, center, mRegionV); break;
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        case SINK             : effect = new VertexEffectSink   (mStrength, center, mRegionV); break;
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        case PINCH            : float lat = latitude>0 ? (float)(-Math.PI/2 + latitude) : (float)(Math.PI/2 + latitude);
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                                float lon = longitude;
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                                float latInDegrees = (float)(lat*180.0f/Math.PI);
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                                float lonInDegrees = (float)(lon*180.0f/Math.PI);
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                                mPinch.set1(latInDegrees);
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                                mPinch.set2(lonInDegrees);
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                                effect = new VertexEffectPinch  (mPinch   , center, mRegionV); break;
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        case SWIRL            : effect = new VertexEffectSwirl  (mSwirl   , center, mRegionV); break;      // SWIRL & WAVE are not really fully
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        case WAVE             : Static5D wave = new Static5D( RADIUS_V/2, RADIUS_V/2, 0, 90-latitude, 90); // 3D effects. They will not look
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                                effect = new VertexEffectWave   (wave     , center, mRegionV); break;      // good everywhere on the sphere.
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        case ALPHA            : effect = new FragmentEffectAlpha     (mStrength,        center, mRegionF, false); break;
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        case SMOOTH_ALPHA     : effect = new FragmentEffectAlpha     (mStrength,        center, mRegionF, true ); break;
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        case CHROMA           : effect = new FragmentEffectChroma    (mStrength, mColor,center, mRegionF, false); break;
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        case SMOOTH_CHROMA    : effect = new FragmentEffectChroma    (mStrength, mColor,center, mRegionF, true ); break;
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        case BRIGHTNESS       : effect = new FragmentEffectBrightness(mStrength,        center, mRegionF, false); break;
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        case SMOOTH_BRIGHTNESS: effect = new FragmentEffectBrightness(mStrength,        center, mRegionF, true ); break;
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        case SATURATION       : effect = new FragmentEffectSaturation(mStrength,        center, mRegionF, false); break;
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        case SMOOTH_SATURATION: effect = new FragmentEffectSaturation(mStrength,        center, mRegionF, true ); break;
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        case CONTRAST         : effect = new FragmentEffectContrast  (mStrength,        center, mRegionF, false); break;
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        case SMOOTH_CONTRAST  : effect = new FragmentEffectContrast  (mStrength,        center, mRegionF, true ); break;
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        default               : android.util.Log.e("EarthRenderer", "unexpected effect: "+name.toString() );
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        }
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      if( effect!=null )
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        {
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        mEffects.apply(effect);
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        }
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      }
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///////////////////////////////////////////////////////////////////////////////////////////////////
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    void removeAll()
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      {
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      mEffects.abortByType(EffectType.VERTEX);
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      mEffects.abortByType(EffectType.FRAGMENT);
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      }
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///////////////////////////////////////////////////////////////////////////////////////////////////
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    public void onSurfaceCreated(GL10 glUnused, EGLConfig config) 
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      {
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      InputStream is = mView.getContext().getResources().openRawResource(R.raw.world);
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      Bitmap bitmap;
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      try
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        {
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        bitmap = BitmapFactory.decodeStream(is);
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        }
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      finally
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        {
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        try
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          {
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          is.close();
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          }
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        catch(IOException e) { }
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        }
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      mTexture.setTexture(bitmap);
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      mScreen.detachAll();
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      mScreen.attach(mTexture,mEffects,mMesh);
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      Effect.enableEffects(EffectType.FRAGMENT);
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      Effect.enableEffects(EffectType.VERTEX);
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      DistortedLibrary.setMax(EffectType.VERTEX  , MAX_EFF);
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      DistortedLibrary.setMax(EffectType.FRAGMENT, MAX_EFF);
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      try
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        {
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        DistortedLibrary.onCreate(mView.getContext());
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        }
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      catch(Exception ex)
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        {
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        android.util.Log.e("Earth", ex.getMessage() );
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        }
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      }
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}