Magic Cube

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

// Copyright 2022 Leszek Koltunski                                                               //

//                                                                                               //

// This file is part of Magic Cube.                                                              //

//                                                                                               //

// Magic Cube is proprietary software licensed under an EULA which you should have received      //

// along with the code. If not, check https://distorted.org/magic/License-Magic-Cube.html        //

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

package org.distorted.bandaged;

import org.json.JSONException;

import java.io.File;

import java.io.FileNotFoundException;

import java.io.IOException;

import java.io.InputStream;

import java.nio.ByteBuffer;

import java.nio.ByteOrder;

import java.util.Stack;

import javax.microedition.khronos.egl.EGLConfig;

import javax.microedition.khronos.opengles.GL10;

import android.app.Activity;

import android.content.res.Resources;

import android.opengl.GLES31;

import android.opengl.GLSurfaceView;

import android.widget.Toast;

import org.distorted.library.effect.EffectType;

import org.distorted.library.effect.FragmentEffectBrightness;

import org.distorted.library.effect.PostprocessEffectBorder;

import org.distorted.library.main.DistortedEffects;

import org.distorted.library.main.DistortedFramebuffer;

import org.distorted.library.main.DistortedLibrary;

import org.distorted.library.main.DistortedNode;

import org.distorted.library.main.DistortedScreen;

import org.distorted.library.main.InternalOutputSurface;

import org.distorted.library.mesh.MeshBase;

import org.distorted.library.type.Static1D;

import org.distorted.library.type.Static3D;

import org.distorted.library.type.Static4D;

import org.distorted.objectlib.bandaged.BandagedObject;

import org.distorted.objectlib.bandaged.LocallyBandagedList;

import org.distorted.objectlib.json.JsonWriter;

import org.distorted.objectlib.main.ObjectControl;

import org.distorted.objectlib.main.TwistyObject;

import org.distorted.dialogs.DialogBandagedSave;

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

public class BandagedRenderer implements GLSurfaceView.Renderer, DistortedLibrary.LibraryUser

{

   private static final int RESET_DURATION = 1000;

   private static final float MAX_SIZE_CHANGE = 1.70f;

   private static final float MIN_SIZE_CHANGE = 0.50f;

   private final BandagedView mView;

   private final Resources mResources;

   private final DistortedScreen mScreen;

   private final Static3D mScale;

   private final Static4D mQuatT, mQuatA;

   private final BandagedObject mObject;

   private final float mInitRatio;

   private boolean mInitialPhase;

   private long mStartTime;

   private float mQuatX, mQuatY, mQuatZ, mQuatW;

   private boolean mResetQuats, mSetQuatT, mResettingObject, mConnectingCubits;

   private boolean mCreatingCubits, mRescaling, mUndoingObject;

   private int mIndex1, mIndex2;

   private int mSaveIcon;

   private DistortedFramebuffer mFramebuffer;

   private String mPath;

   private boolean mCubitsCreated;

   private int mWidth, mHeight;

   private float mScaleValue, mObjectScreenRatio;

   private final Stack<Integer> mPairs;  // each Integer holds a packed pair in ints

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

   BandagedRenderer(BandagedView v, int ordinal)

     {

     mView = v;

     mResources = v.getResources();

     mQuatT = new Static4D(0,0,0,1);

     mQuatA = new Static4D(-0.25189602f,0.3546389f,0.009657208f,0.90038127f);

     mResetQuats       = false;

     mSetQuatT         = false;

     mResettingObject  = false;

     mConnectingCubits = false;

     mCubitsCreated    = false;

     mCreatingCubits   = false;

     mRescaling        = false;

     mUndoingObject    = false;

     mSaveIcon = -1;

     mScreen = new DistortedScreen();

     BandagedActivity act = (BandagedActivity)v.getContext();

     act.setUpBackgroundColor(mScreen);

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

     mObject= LocallyBandagedList.create(ordinal,mScreen);

     mInitRatio = mObject.getScreenRatio();

     mObjectScreenRatio= mInitRatio;

     mPairs = new Stack<>();

     }

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

   @Override

   public void onDrawFrame(GL10 glUnused)

     {

     long time = System.currentTimeMillis();

     mScreen.render(time);

     if( mSetQuatT )

       {

       mSetQuatT = false;

       mQuatT.set(mQuatX,mQuatY,mQuatZ,mQuatW);

       }

     if( mResetQuats )

       {

       mResetQuats = false;

       float qx = mQuatT.get0();

       float qy = mQuatT.get1();

       float qz = mQuatT.get2();

       float qw = mQuatT.get3();

       float rx = mQuatA.get0();

       float ry = mQuatA.get1();

       float rz = mQuatA.get2();

       float rw = mQuatA.get3();

       float tx = rw*qx - rz*qy + ry*qz + rx*qw;

       float ty = rw*qy + rz*qx + ry*qw - rx*qz;

       float tz = rw*qz + rz*qw - ry*qx + rx*qy;

       float tw = rw*qw - rz*qz - ry*qy - rx*qx;

       mQuatT.set(0f, 0f, 0f, 1f);

       mQuatA.set(tx, ty, tz, tw);

       }

     if( mResettingObject )

       {

       boolean done = continueResetting(time);

       if( done )

         {

         mResettingObject = false;

         mPairs.clear();

         }

       }

     if( mSaveIcon>=0 )

       {

       renderIcon(time); // for some reason we need to call render() twice here, otherwise the

       mSaveIcon++;      // icon turns out black. Probably some problem with binding the texture.

       }

     if( mSaveIcon>=2 )

       {

       saveIcon();

       mSaveIcon = -1;

       }

     if( mConnectingCubits )

       {

       boolean success = mObject.tryConnectingCubits(mIndex1,mIndex2,mScaleValue);

       if( success ) mPairs.add( packTwoIntsIntoPair(mIndex1,mIndex2) );

       mConnectingCubits = false;

       }

     if( mUndoingObject )

       {

       int num = mPairs.size();

       if( num>0 )

         {

         int pair  = mPairs.pop();

         int first = getFirstFromPair(pair);

         int second= getSecondFromPair(pair);

         mObject.disconnectCubits(first, second, mScaleValue);

         }

       mUndoingObject = false;

       }

     if( mCreatingCubits )

       {

       mPairs.clear();

       rescaleObject();

       if( mCubitsCreated )

         {

         mObject.createCubits(mQuatT,mQuatA,mScale);

         float[] dist = mObject.getDist3D();

         BandagedTouchControl control = mView.getTouchControl();

         control.setDist3D(dist);

         mScreen.detachAll();

         mView.resetCubits();

         mObject.attachCubits(mScaleValue);

         }

       mCreatingCubits = false;

       }

     if( mRescaling )

       {

       rescaleObject();

       mObject.scaleCubits(mScaleValue);

       BandagedTouchControl control = mView.getTouchControl();

       control.setObjectRatio(mObjectScreenRatio);

       mRescaling = false;

       }

     }

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

   @Override

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

      {

      if( width!=mWidth || height!=mHeight )

        {

        mWidth = width;

        mHeight= height;

        rescaleObject();

        mScreen.detachAll();

        int touched = mView.getTouched();

        mObject.attachAndMarkCubits(mScaleValue,touched);

        mView.setScreenSize(width,height);

        mScreen.resize(width,height);

        }

      }

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

   @Override

   public void onSurfaceCreated(GL10 glUnused, EGLConfig config)

      {

      DistortedLibrary.setMax(EffectType.VERTEX,0);

      MeshBase.setMaxEffComponents(ObjectControl.MAX_MOVING_PARTS);

      FragmentEffectBrightness.enable();

      DistortedLibrary.onSurfaceCreated(this,1);

      DistortedLibrary.setCull(true);

      mObject.recreateCubits(mQuatT,mQuatA,mScale);

      mCubitsCreated = true;

      mWidth = 0;

      mHeight= 0;

      }

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

   public DistortedScreen getScreen()

     {

     return mScreen;

     }

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

   void setConnecting(int index1, int index2)

     {

     mIndex1 = index1;

     mIndex2 = index2;

     mConnectingCubits = true;

     }

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

   public Static4D getQuatAccu()

     {

     return mQuatA;

     }

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

   public void setQuatTemp(float x, float y, float z, float w)

     {

     mSetQuatT = false;

     mQuatX = x;

     mQuatY = y;

     mQuatZ = z;

     mQuatW = w;

     mSetQuatT = true;

     }

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

   public void resetQuats()

     {

     mResetQuats = true;

     }

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

   public boolean isBusy()

     {

     return (mResettingObject || mCreatingCubits || mConnectingCubits);

     }

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

   public void saveObject()

     {

     TwistyObject obj = mObject.createObject(TwistyObject.MODE_NORM, 1.0f );

     String name = obj.getShortName();

     BandagedActivity act = (BandagedActivity) mView.getContext();

     if( act.objectDoesntExist(name) && createObjectJson(obj,act) )

       {

       setupIconCreation(act);

       act.addObject(obj.getShortName());

       act.doNotShowDialogAnymore();

       }

     }

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

   private int packTwoIntsIntoPair(int index1, int index2)

     {

     return (index1<<16) + index2;

     }

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

   private int getFirstFromPair(int pair)

     {

     return pair>>16;

     }

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

   private int getSecondFromPair(int pair)

     {

     return pair&0xffff;

     }

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

   private boolean createObjectJson(TwistyObject object, Activity act)

     {

     final String name = object.getShortName()+"_object.json";

     File file = new File(act.getFilesDir(), name);

     String filename = file.getAbsolutePath();

     try

       {

       JsonWriter writer = JsonWriter.getInstance();

       String json = writer.createObjectString(object);

       writer.write(filename,json);

       return true;

       }

     catch(JSONException ex)

       {

       act.runOnUiThread(new Runnable()

         {

         public void run()

           {

           String message = "JSON Exception saving to \n\n"+filename+"\n\n failed:\n\n"+ex.getMessage();

           Toast.makeText(act,message,Toast.LENGTH_LONG).show();

           }

         });

       return false;

       }

     catch(FileNotFoundException ex)

       {

       act.runOnUiThread(new Runnable()

         {

         public void run()

           {

           String message = "FileNotFound exception saving to \n\n"+filename+"\n\n failed:\n\n"+ex.getMessage();

           Toast.makeText(act,message,Toast.LENGTH_LONG).show();

           }

         });

       return false;

       }

     catch(IOException ex)

       {

       act.runOnUiThread(new Runnable()

         {

         public void run()

           {

           String message = "IO exception saving to \n\n"+filename+"\n\n failed:\n\n"+ex.getMessage();

           Toast.makeText(act,message,Toast.LENGTH_LONG).show();

           }

         });

       return false;

       }

     }

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

   private void setupIconCreation(Activity act)

     {

     final float R=1.0f;

     final int FBO_WIDTH  = (int)(R*720);

     final int FBO_HEIGHT = (int)(R*1280);

     final float OBJECT_SIZE = R*0.60f;

     TwistyObject obj = mObject.createObject(TwistyObject.MODE_ICON, OBJECT_SIZE );

     DistortedEffects effects = obj.getObjectEffects();

     DistortedNode node = obj.getNode();

     if( mFramebuffer==null )

       {

       mFramebuffer = new DistortedFramebuffer(FBO_WIDTH,FBO_HEIGHT,1, InternalOutputSurface.DEPTH_NO_STENCIL);

       mFramebuffer.glClearColor(0,0,0,0);

       }

     mFramebuffer.setProjection( mObject.computeProjectionAngle() ,0.1f);

     mFramebuffer.detachAll();

     mFramebuffer.attach(node);

     Static1D halo = new Static1D(5);

     Static4D color = new Static4D(0,0,0,1);

     PostprocessEffectBorder border = new PostprocessEffectBorder(halo,color);

     border.setHaloDepth(false);

     effects.apply(border);

     final String name = obj.getShortName()+".png";

     File file = new File(act.getFilesDir(), name);

     String filename = file.getAbsolutePath();

     mSaveIcon = 0;

     mPath = filename;

     }

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

   private void renderIcon(long time)

     {

     mFramebuffer.render(time);

     }

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

   private void saveIcon()

     {

     int fW = mFramebuffer.getWidth();

     int fH = mFramebuffer.getHeight();

     ByteBuffer buf = ByteBuffer.allocateDirect(fW*fH*4);

     buf.order(ByteOrder.LITTLE_ENDIAN);

     mFramebuffer.setAsReadFramebuffer(0);

     GLES31.glReadBuffer(GLES31.GL_COLOR_ATTACHMENT0);

     GLES31.glReadPixels( 0, 0, fW, fH, GLES31.GL_RGBA, GLES31.GL_UNSIGNED_BYTE, buf);

     BandagedWorkerThread.newBuffer(buf,fW,fH,6,mPath);

     GLES31.glBindFramebuffer(GLES31.GL_READ_FRAMEBUFFER, 0);

     mSaveIcon = -1;

     }

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

   void mulObjectRatio(float ratio)

     {

     mObjectScreenRatio *= ratio;

     if( mObjectScreenRatio>MAX_SIZE_CHANGE*mInitRatio) mObjectScreenRatio = MAX_SIZE_CHANGE*mInitRatio;

     if( mObjectScreenRatio<MIN_SIZE_CHANGE*mInitRatio) mObjectScreenRatio = MIN_SIZE_CHANGE*mInitRatio;

     mRescaling = true;

     }

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

   float getObjectRatio()

     {

     return mObjectScreenRatio;

     }

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

   private void rescaleObject()

     {

     float size = mObject.getMaxSize();

     final float Q = mObjectScreenRatio/size;

     mScaleValue = mWidth<mHeight ? Q*mWidth : Q*mHeight;

     mScale.set( mScaleValue,mScaleValue,mScaleValue );

     }

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

   public void changeObject(int x, int y, int z)

     {

     if( mObject.tryChangeObject(x,y,z) ) mCreatingCubits = true;

     }

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

   public void displaySavingDialog()

     {

     BandagedActivity act = (BandagedActivity)mView.getContext();

     DialogBandagedSave saveDiag = new DialogBandagedSave();

     saveDiag.show(act.getSupportFragmentManager(), null);

     }

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

   public void setupReset()

     {

     mResettingObject = true;

     mInitialPhase    = true;

     mStartTime       = System.currentTimeMillis();

     }

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

   public void setupUndo()

     {

     mUndoingObject = true;

     }

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

   public boolean continueResetting(long time)

     {

     long diff = time-mStartTime;

     float quotient = ((float)diff)/RESET_DURATION;

     if( mInitialPhase && quotient>0.5f )

       {

       mInitialPhase=false;

       mView.resetCubits();

       mObject.resetObject(mScaleValue);

       }

     double angle = 2*Math.PI*quotient*quotient*(3-2*quotient);

     float sinA = (float)Math.sin(angle);

     float cosA = (float)Math.cos(angle);

     mQuatT.set(0, -sinA, 0, cosA);

     return quotient>1.0f;

     }

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

  public void touchCubit(int index)

    {

    mObject.touchCubit(index);

    }

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

  public void untouchCubit(int index)

    {

    mObject.untouchCubit(index);

    }

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

  public BandagedTouchControl createTouchControl()

    {

    return new BandagedTouchControl( getObjectRatio() , mScreen.getFOV(), mObject );

    }

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

  public void distortedException(Exception ex)

    {

    android.util.Log.e("BandagedCreator", "unexpected exception: "+ex.getMessage() );

    }

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

  public InputStream localFile(int fileID)

    {

    return mResources.openRawResource(fileID);

    }

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

  public void logMessage(String message)

    {

    android.util.Log.e("BandagedCreator", message );

    }

}