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.transparency;

import android.opengl.GLSurfaceView;

import org.distorted.library.effect.FragmentEffectAlpha;

import org.distorted.library.effect.MatrixEffectMove;

import org.distorted.library.effect.MatrixEffectQuaternion;

import org.distorted.library.effect.MatrixEffectScale;

import org.distorted.library.effect.PostprocessEffectBlur;

import org.distorted.library.main.Distorted;

import org.distorted.library.main.DistortedEffects;

import org.distorted.library.main.DistortedNode;

import org.distorted.library.main.DistortedScreen;

import org.distorted.library.main.DistortedTexture;

import org.distorted.library.main.MeshFlat;

import org.distorted.library.type.Static1D;

import org.distorted.library.type.Static3D;

import org.distorted.library.type.Static4D;

import javax.microedition.khronos.egl.EGLConfig;

import javax.microedition.khronos.opengles.GL10;

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

class TransparencyRenderer implements GLSurfaceView.Renderer

{

    private static final int NUM = 4; // 4 ints (x,y,z, argb) each describe 1 object below

    private static final int[] OBJECTS =

        {

         +9, -10, +2, 0xffff0000,

         -9, +10, -2, 0xffffff00

        };

    private static final int NUM_OBJECTS = OBJECTS.length/NUM;

    private static final int OBJ_SIZE    = 100;

    private GLSurfaceView mView;

    private DistortedNode[] mNode;

    private DistortedTexture[] mTex;

    private Static3D[]  mMoveVector;

    private Static1D[]  mAlphaVector;

    private DistortedScreen mScreen;

    private Static3D mMove, mScale, mCenter;

    Static4D mQuat1, mQuat2;

    int mScreenMin;

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

    TransparencyRenderer(GLSurfaceView v)

      {

      mView = v;

      MeshFlat mesh = new MeshFlat(1,1);

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

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

      mScreen = new DistortedScreen();

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

      mMoveVector   = new Static3D[NUM_OBJECTS];

      mAlphaVector  = new Static1D[NUM_OBJECTS];

      mNode         = new DistortedNode[NUM_OBJECTS];

      mTex          = new DistortedTexture[NUM_OBJECTS];

      FragmentEffectAlpha[] alpha  = new FragmentEffectAlpha[NUM_OBJECTS];

      DistortedEffects[] effects   = new DistortedEffects[NUM_OBJECTS];

      PostprocessEffectBlur[] blur = new PostprocessEffectBlur[NUM_OBJECTS];

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

      mScale = new Static3D(1.0f,1.0f,1.0f);

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

      MatrixEffectMove moveEffect        = new MatrixEffectMove(mMove);

      MatrixEffectScale scaleEffect      = new MatrixEffectScale(mScale);

      MatrixEffectQuaternion quatEffect1 = new MatrixEffectQuaternion(mQuat1, mCenter);

      MatrixEffectQuaternion quatEffect2 = new MatrixEffectQuaternion(mQuat2, mCenter);

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

        {

        mTex[i]          = new DistortedTexture(OBJ_SIZE,OBJ_SIZE);

        mMoveVector[i]   = new Static3D(0,0,0);

        mAlphaVector[i]  = new Static1D(0.5f);

        alpha[i]         = new FragmentEffectAlpha(mAlphaVector[i]);

        blur[i]          = new PostprocessEffectBlur(new Static1D(0));

        effects[i]       = new DistortedEffects();

        effects[i].apply(blur[i]);

        effects[i].apply(alpha[i]);

        effects[i].apply(moveEffect);

        effects[i].apply(scaleEffect);

        effects[i].apply(quatEffect1);

        effects[i].apply(quatEffect2);

        effects[i].apply(new MatrixEffectMove(mMoveVector[i]));

        mNode[i] = new DistortedNode(mTex[i], effects[i], mesh );

        mScreen.attach(mNode[i]);

        }

      }

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

    void setTransparency(int object, float level)

      {

      if( object>=0 && object<NUM_OBJECTS) mAlphaVector[object].set(level);

      }

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

// no better way to attach mNode[object] as the first child than detaching all and reattaching back...

    void setRenderFirst(int object)

      {

      if( object>=0 && object<NUM_OBJECTS)

        {

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

          {

          mScreen.detach(mNode[i]);

          }

        mScreen.attach(mNode[object]);

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

          {

          if( i!=object )

            mScreen.attach(mNode[i]);

          }

        }

      }

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

    public void onDrawFrame(GL10 glUnused) 

      {

      mScreen.render(System.currentTimeMillis());

      }

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

    public void onSurfaceCreated(GL10 glUnused, EGLConfig config) 

      {

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

        {

        mTex[i].setColor(OBJECTS[NUM * i + 3]);

        }

      PostprocessEffectBlur.enable();

      FragmentEffectAlpha.enable();

      try

        {

        Distorted.onCreate(mView.getContext());

        }

      catch(Exception ex)

        {

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

        }

      }

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

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

      {

      mScreenMin = width<height ? width:height;

      float factor = 0.70f*mScreenMin/OBJ_SIZE;

      mScale.set(factor,factor,factor);

      mCenter.set((float)OBJ_SIZE/2, (float)OBJ_SIZE/2, -(float)OBJ_SIZE/2 );

      mMove.set( (width -factor*OBJ_SIZE)/2 ,(height-factor*OBJ_SIZE)/2 ,0);

      float size= 0.02f*OBJ_SIZE;

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

        {

        mMoveVector[i].set(size*OBJECTS[NUM*i], size*OBJECTS[NUM*i+1], size*OBJECTS[NUM*i+2]);

        }

      mScreen.resize(width, height);

      }

}