TwistyPuzzleLib

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

// Copyright 2023 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.objectlib.main;

import org.distorted.library.effect.VertexEffectRotate;

import org.distorted.library.main.DistortedEffects;

import org.distorted.library.message.EffectListener;

import org.distorted.library.type.Dynamic1D;

import org.distorted.library.type.Static1D;

import org.distorted.library.type.Static3D;

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

public class TwistyLayerRotations

  {

  private static final int STATE_NOTHING = 0;

  private static final int STATE_ROTATE  = 1;

  private static final int STATE_FINISH  = 2;

  private static final int POST_ROTATION_MILLISEC = 500;

  private static final Static3D CENTER = new Static3D(0,0,0);

  private int mRotationState;

  private int mRotRowBitmap;

  private int mCurrentRotAxis;

  private final int mMaxNumLayers;

  private final Static3D mRotationAxis;

  private final VertexEffectRotate mRotateEffect;

  private final Dynamic1D mRotationAngle;

  private final Static1D mRotationAngleStatic, mRotationAngleMiddle, mRotationAngleFinal;

  private final TwistyObject mParent;

  // ghost angle

  private final int mGhostAngle;

  private final Static3D[] mAxis;

  private final int[] mNumLayers;

  private int mSolvedBitmap;

  private int mGhostEffectBitmap;

  private VertexEffectRotate mGhostEffect1;

  private boolean mCanGhost;

  private Static3D mEffectAx;

  private int mAxNum;

  private int mGhostRot;

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

  TwistyLayerRotations(TwistyObject parent, Static3D[] axis, int[] numLayers, int ghostAngle, DistortedEffects effect)

    {

    mParent = parent;

    mGhostAngle = ghostAngle;

    mAxis = axis;

    mNumLayers = numLayers;

    int maxLayers = -1;

    for(int numLayer : numLayers) if(maxLayers<numLayer) maxLayers = numLayer;

    mMaxNumLayers = maxLayers;

    mRotationState = STATE_NOTHING;

    mRotationAngleStatic = new Static1D(0);

    mRotationAngleMiddle = new Static1D(0);

    mRotationAngleFinal  = new Static1D(0);

    mRotationAngle= new Dynamic1D();

    mRotationAxis = new Static3D(1,0,0);

    mRotateEffect = new VertexEffectRotate(mRotationAngle, mRotationAxis, CENTER);

    effect.apply(mRotateEffect);

    if( mGhostAngle!=0 )

      {

      mAxNum = 0;

      int nL = mNumLayers[mAxNum];

      mEffectAx = mAxis[mAxNum];

      int numRightRows = nL - nL/2;

      mSolvedBitmap =  ((1<<numRightRows)-1)<<(nL/2);

      mGhostEffectBitmap = mSolvedBitmap;

      mParent.enableGhostAxis(mAxNum,false);

      Static1D ghostAngle1= new Static1D(mGhostAngle);

      mGhostEffect1 = new VertexEffectRotate(ghostAngle1, mEffectAx, CENTER);

      mGhostEffect1.setMeshAssociation(mGhostEffectBitmap,-1);

      effect.apply(mGhostEffect1);

      }

    }

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

// GHOST

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

  private int computeGhostAngle(int row, int basicAngle, float angle, float speed)

    {

    boolean ghosted = rowIsGhosted(row);

    int basic = 360/basicAngle;

    int nearest = computeNearest( ghosted ? basic-mGhostAngle : mGhostAngle, basic, angle );

    if( (nearest%basic)!=0 )

      {

      changeRow(row);

      mGhostRot = (ghosted ? 1:-1)*mGhostAngle;

      }

    int ret= computeNoGhostAngle(basicAngle,angle,speed);

    android.util.Log.e("D", "computeGhostAngle: "+ret+" ghostRot="+mGhostRot+" angle>0: "+(angle>0)+" ghosted="+ghosted);

    return ret;

    }

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

  private boolean rowIsGhosted(int row)

    {

    return ((mGhostEffectBitmap>>row)&0x1)==1;

    }

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

  private int computeNearest(int ghostAngle, int basicAngle, float angle)

    {

    float A = (2*angle-ghostAngle)/basicAngle;

    int k = A>=0 ? (int)A : (int)A-1;

    return (k%2)==0 ? (k/2)*basicAngle+ghostAngle : ((k+1)/2)*basicAngle;

    }

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

  private void changeRow(int row)

    {

    android.util.Log.e("D", "changing row "+row);

    int nL = mNumLayers[mAxNum];

    if( mGhostEffectBitmap==0 || mGhostEffectBitmap==((1<<nL)-1) ) mParent.enableGhostAxis(mAxNum,false);

    mGhostEffectBitmap ^= (1<<row);

    if( mGhostEffectBitmap==0 || mGhostEffectBitmap==((1<<nL)-1) ) mParent.enableGhostAxis(mAxNum,true);

    mGhostEffect1.setMeshAssociation( mGhostEffectBitmap, -1);

    }

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

// END GHOST

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

  private int computeNoGhostAngle(int basicAngle, float angle, float speed)

    {

    int basicDeg = 360/basicAngle;

    int numRot = (int)(angle/basicDeg + 0.5f);

    if( angle< -(basicDeg*0.5) ) numRot-=1;

    if( numRot==0 && speed>1.1f ) numRot = (angle>0 ? 1:-1);

    return basicDeg*numRot;

    }

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

  private int computeNearestAngle(int axisIndex, int row, int basicAngle, float angle, float speed)

    {

    if( mGhostAngle==0 || axisIndex!=0 /*|| !mCanGhost*/ )

      {

      return computeNoGhostAngle(basicAngle,angle,speed);

      }

    else

      {

      return computeGhostAngle(row,basicAngle,angle,speed);

      }

    }

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

  private float getAngle()

    {

    int pointNum = mRotationAngle.getNumPoints();

    return pointNum>=1 ? mRotationAngle.getPoint(pointNum-1).get0() : 0;

    }

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

// API

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

// the rotation has fully finished (everything including the last mini 'come back'). Delete it.

  synchronized float removeRotation()

    {

    float angle = getAngle();

    mRotationAngleStatic.set0(0);

    mRotationAngle.removeAll();

    mParent.rotateAllCubits(mCurrentRotAxis,mRotRowBitmap, (int)angle );

    mRotationState = STATE_NOTHING;

    return angle;

    }

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

// we have just lifted the finger; create this last little 'come back'

  long finishRotation(ObjectPreRender pre, int axisIndex, int row, int basicAngle, float finishAngle, float avgSpeed)

    {

    mGhostRot = 0;

    int nearestAngleInDegrees = computeNearestAngle(axisIndex,row,basicAngle,finishAngle,avgSpeed);

    mRotationState = STATE_FINISH;

    float angle = getAngle() + mGhostRot;

    mRotationAngleStatic.set0(angle);

    mRotationAngleFinal.set0(nearestAngleInDegrees);

    mRotationAngleMiddle.set0( nearestAngleInDegrees + (nearestAngleInDegrees-angle)*0.2f );

    mRotationAngle.setDuration(POST_ROTATION_MILLISEC);

    mRotationAngle.resetToBeginning();

    mRotationAngle.removeAll();

    mRotationAngle.add(mRotationAngleStatic);

    mRotationAngle.add(mRotationAngleMiddle);

    mRotationAngle.add(mRotationAngleFinal);

    mRotateEffect.notifyWhenFinished(pre);

    return mRotateEffect.getID();

    }

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

// rotation has begun and we have just moved the finger a bit

  void continueRotation(float angleInDegrees)

    {

    mRotationAngleStatic.set0(angleInDegrees);

    }

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

// this is 'programmatic' rotation - i.e. for example the one induced by the 'backMove' button.

  synchronized long addRotation(EffectListener listener, int axisIndex, int rowBitmap, int angle, long durationMillis )

    {

    int mult = 1;

    if( mRotationState==STATE_ROTATE ) return 0;

    if( mRotationState==STATE_FINISH ) { removeRotation(); mult = -1; }

    mRotationState = STATE_ROTATE;

    mCurrentRotAxis= axisIndex;

    mRotRowBitmap  = mParent.computeBandagedBitmap(rowBitmap,axisIndex);

    mRotationAngleStatic.set0(0.0f);

    mRotationAxis.set(mAxis[axisIndex]);

    mRotationAngle.setDuration(durationMillis);

    mRotationAngle.resetToBeginning();

    mRotationAngle.add(new Static1D(0));

    mRotationAngle.add(new Static1D(angle));

    mRotateEffect.setMeshAssociation( mRotRowBitmap<<(axisIndex*mMaxNumLayers) , -1);

    mRotateEffect.notifyWhenFinished(listener);

    return mult*mRotateEffect.getID();

    }

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

// i.e. we just touched the screen, moved it a little bit and the TouchControl has figured out

// along which axis we are going to rotate.

  synchronized boolean beginRotation(int axisIndex, int row )

    {

    if( mRotationState==STATE_ROTATE ) return false;

    if( mRotationState==STATE_FINISH ) removeRotation();

    mRotationState = STATE_ROTATE;

    mCurrentRotAxis= axisIndex;

    mRotRowBitmap  = mParent.computeBandagedBitmap( (1<<row),axisIndex );

    mRotationAngleStatic.set0(0.0f);

    mRotationAxis.set( mAxis[axisIndex] );

    mRotationAngle.add(mRotationAngleStatic);

    mRotateEffect.setMeshAssociation( mRotRowBitmap<<(axisIndex*mMaxNumLayers) , -1);

    return true;

    }

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

  boolean isSolved(boolean solved)

    {

    mCanGhost = solved;

    return (solved && (mGhostAngle==0 || mGhostEffectBitmap==mSolvedBitmap) );

    }

  }