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///////////////////////////////////////////////////////////////////////////////////////////////////
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// Copyright 2023 Leszek Koltunski //
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// //
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// This file is part of Magic Cube. //
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// //
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// Magic Cube is proprietary software licensed under an EULA which you should have received //
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// along with the code. If not, check https://distorted.org/magic/License-Magic-Cube.html //
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///////////////////////////////////////////////////////////////////////////////////////////////////
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package org.distorted.solvers;
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import android.content.res.Resources;
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import org.distorted.main.R;
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import org.distorted.objectlib.main.ObjectSignatures;
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import org.distorted.objectlib.main.TwistyObject;
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import org.distorted.objectlib.tablebases.ImplementedTablebasesList;
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import org.distorted.objectlib.tablebases.TablebaseHelpers;
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import org.distorted.objectlib.tablebases.TablebasesAbstract;
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///////////////////////////////////////////////////////////////////////////////////////////////////
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public class SolverSkewbDiamond extends SolverTablebase
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{
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private static final int ERROR_CORNER_FR_MISSING = -1;
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private static final int ERROR_CORNER_BR_MISSING = -2;
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private static final int ERROR_CORNER_BL_MISSING = -3;
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private static final int ERROR_CORNER_FL_MISSING = -4;
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private static final int ERROR_CORNER_TO_MISSING = -5;
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private static final int ERROR_CORNER_BO_MISSING = -6;
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private static final int ERROR_CENTER_0_MISSING = -7;
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private static final int ERROR_CENTER_1_MISSING = -8;
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private static final int ERROR_CENTER_2_MISSING = -9;
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private static final int ERROR_CENTER_3_MISSING = -10;
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private static final int ERROR_CENTER_4_MISSING = -11;
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private static final int ERROR_CENTER_5_MISSING = -12;
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private static final int ERROR_CENTER_6_MISSING = -13;
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private static final int ERROR_CENTER_7_MISSING = -14;
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private static final int ERROR_TWO_CORNERS = -15;
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private static final int ERROR_TWO_CENTERS = -16;
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private static final int ERROR_CORNER_TWIST = -17;
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private static final int ERROR_CORNERS_CANNOT = -18;
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private TablebasesAbstract mSolver;
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private final int[] mFaceColors;
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private static final int[] FREE_CENTERS = {0,2,5,7};
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///////////////////////////////////////////////////////////////////////////////////////////////////
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public SolverSkewbDiamond(Resources res, TwistyObject object)
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{
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super(res,object);
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mFaceColors = new int[8];
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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private int retCorner(int[][] corners, int c1, int c2)
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{
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for(int i=0; i<6; i++)
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{
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int[] cor = corners[i];
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int twist = retCornerTwist(cor,c1,c2);
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if( twist>=0 ) return i;
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}
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return -1;
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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private int[] getCornersPermutation(int[][] corners)
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{
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int[] perm = new int[6];
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perm[0] = retCorner(corners,mFaceColors[1],mFaceColors[4]);
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perm[1] = retCorner(corners,mFaceColors[1],mFaceColors[6]);
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perm[2] = retCorner(corners,mFaceColors[3],mFaceColors[6]);
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perm[3] = retCorner(corners,mFaceColors[3],mFaceColors[4]);
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perm[4] = retCorner(corners,mFaceColors[1],mFaceColors[3]);
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perm[5] = retCorner(corners,mFaceColors[4],mFaceColors[6]);
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return perm;
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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private int computeCornerTwist(int[] corner, int color )
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{
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if( corner[3]==color ) return 0;
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if( corner[2]==color ) return 1;
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if( corner[1]==color ) return 2;
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if( corner[0]==color ) return 3;
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return -1;
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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private int[] getCornersTwist(int[] corners_perm, int[][] corners)
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{
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int[] twist = new int[6];
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twist[0] = computeCornerTwist( corners[corners_perm[0]], mFaceColors[1] );
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twist[1] = computeCornerTwist( corners[corners_perm[1]], mFaceColors[1] );
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twist[2] = computeCornerTwist( corners[corners_perm[2]], mFaceColors[3] );
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twist[3] = computeCornerTwist( corners[corners_perm[3]], mFaceColors[3] );
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twist[4] = computeCornerTwist( corners[corners_perm[4]], mFaceColors[1] );
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twist[5] = computeCornerTwist( corners[corners_perm[5]], mFaceColors[4] );
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return twist;
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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private int retCenter(int color, int[] centers)
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{
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for(int i=0; i<4; i++ )
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if( centers[FREE_CENTERS[i]]==color ) return i;
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return -1;
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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private int[] getFreeCentersPermutation(int[] centers)
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{
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int[] perm = new int[4];
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for(int i=0; i<4; i++ )
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perm[i] = retCenter(mFaceColors[FREE_CENTERS[i]],centers);
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return perm;
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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private int getTotalTwist(int[] twist)
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{
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int total = 0;
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for(int i=0; i<6; i++)
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{
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int t= twist[i];
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if( t==1 || t==3 ) return -1;
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if( i<5 && t==2 ) total+=(1<<i);
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}
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return total;
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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private int retCornerTwist(int[] corner, int c1, int c2)
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{
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if( corner[0]==c1 && corner[2]==c2 ) return 1;
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if( corner[1]==c1 && corner[3]==c2 ) return 2;
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if( corner[2]==c1 && corner[0]==c2 ) return 3;
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if( corner[3]==c1 && corner[1]==c2 ) return 0;
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return -1;
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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private int figureOutColor(int[][] corners, int c1, int c2)
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{
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for(int i=0; i<6; i++)
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{
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int[] cor = corners[i];
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int twist = retCornerTwist(cor,c1,c2);
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if( twist>=0 ) return cor[twist];
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}
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return -1;
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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// We only move the UR, UR, DR & DB faces --> those centers are fixed and determine the colors of
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// the faces.
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private int figureOutFaceColors(int[] output, int[] centers, int[][] corners)
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{
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output[1] = centers[1];
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output[3] = centers[3];
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output[4] = centers[4];
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output[6] = centers[6];
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int color01 = figureOutColor(corners,output[4],output[1]);
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if( color01<0 ) return ERROR_CORNER_FR_MISSING;
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int color02 = figureOutColor(corners,output[3],output[4]);
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if( color02<0 ) return ERROR_CORNER_FL_MISSING;
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int color03 = figureOutColor(corners,output[1],output[3]);
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if( color03<0 ) return ERROR_CORNER_TO_MISSING;
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if( color01!=color02 || color01!=color03 ) return ERROR_CORNERS_CANNOT;
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output[0] = color01;
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int color21 = figureOutColor(corners,output[1],output[6]);
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if( color21<0 ) return ERROR_CORNER_BR_MISSING;
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int color22 = figureOutColor(corners,output[6],output[3]);
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if( color22<0 ) return ERROR_CORNER_BL_MISSING;
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int color23 = figureOutColor(corners,output[3],output[1]);
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if( color23<0 ) return ERROR_CORNER_TO_MISSING;
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if( color21!=color22 || color21!=color23 ) return ERROR_CORNERS_CANNOT;
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output[2] = color21;
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int color51 = figureOutColor(corners,output[1],output[4]);
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if( color51<0 ) return ERROR_CORNER_FR_MISSING;
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int color52 = figureOutColor(corners,output[6],output[1]);
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if( color52<0 ) return ERROR_CORNER_BR_MISSING;
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int color53 = figureOutColor(corners,output[4],output[6]);
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if( color53<0 ) return ERROR_CORNER_BO_MISSING;
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if( color51!=color52 || color51!=color53 ) return ERROR_CORNERS_CANNOT;
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output[5] = color51;
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int color71 = figureOutColor(corners,output[3],output[6]);
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if( color71<0 ) return ERROR_CORNER_BL_MISSING;
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int color72 = figureOutColor(corners,output[4],output[3]);
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if( color72<0 ) return ERROR_CORNER_FL_MISSING;
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int color73 = figureOutColor(corners,output[6],output[4]);
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if( color73<0 ) return ERROR_CORNER_BO_MISSING;
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if( color71!=color72 || color71!=color73 ) return ERROR_CORNERS_CANNOT;
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output[7] = color71;
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return 0;
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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private int checkAllColorsDifferent()
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{
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for(int i=0; i<8; i++)
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{
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boolean present = false;
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for(int j=0; j<8; j++)
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if( mFaceColors[j]==i )
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{
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present=true;
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break;
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}
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if( !present ) return ERROR_CORNERS_CANNOT;
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}
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return 0;
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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private int checkAllCentersPresent(int[] centers)
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{
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for(int i=0; i<8; i++)
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{
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boolean present = false;
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for(int j=0; j<8; j++)
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if( centers[j]==i )
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{
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present=true;
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break;
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}
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if( !present )
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{
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switch(i)
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{
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case 0: return ERROR_CENTER_0_MISSING;
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case 1: return ERROR_CENTER_1_MISSING;
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case 2: return ERROR_CENTER_2_MISSING;
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case 3: return ERROR_CENTER_3_MISSING;
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case 4: return ERROR_CENTER_4_MISSING;
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case 5: return ERROR_CENTER_5_MISSING;
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case 6: return ERROR_CENTER_6_MISSING;
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case 7: return ERROR_CENTER_7_MISSING;
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}
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}
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}
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return 0;
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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private void getCorners(TwistyObject object, int[][] corners)
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{
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corners[0][0] = object.getCubitFaceStickerIndex( 0,5); // FR
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corners[0][1] = object.getCubitFaceStickerIndex( 0,4);
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corners[0][2] = object.getCubitFaceStickerIndex( 0,0);
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corners[0][3] = object.getCubitFaceStickerIndex( 0,1);
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corners[1][0] = object.getCubitFaceStickerIndex( 1,2); // BR
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corners[1][1] = object.getCubitFaceStickerIndex( 1,6);
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corners[1][2] = object.getCubitFaceStickerIndex( 1,5);
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corners[1][3] = object.getCubitFaceStickerIndex( 1,1);
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corners[2][0] = object.getCubitFaceStickerIndex( 2,7); // BL
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corners[2][1] = object.getCubitFaceStickerIndex( 2,6);
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corners[2][2] = object.getCubitFaceStickerIndex( 2,2);
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corners[2][3] = object.getCubitFaceStickerIndex( 2,3);
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corners[3][0] = object.getCubitFaceStickerIndex( 3,0); // FL
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corners[3][1] = object.getCubitFaceStickerIndex( 3,4);
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corners[3][2] = object.getCubitFaceStickerIndex( 3,7);
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corners[3][3] = object.getCubitFaceStickerIndex( 3,3);
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corners[4][0] = object.getCubitFaceStickerIndex( 4,0); // U
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corners[4][1] = object.getCubitFaceStickerIndex( 4,3);
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corners[4][2] = object.getCubitFaceStickerIndex( 4,2);
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corners[4][3] = object.getCubitFaceStickerIndex( 4,1);
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corners[5][0] = object.getCubitFaceStickerIndex( 5,5); // D
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corners[5][1] = object.getCubitFaceStickerIndex( 5,6);
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corners[5][2] = object.getCubitFaceStickerIndex( 5,7);
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corners[5][3] = object.getCubitFaceStickerIndex( 5,4);
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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private void getCenters(TwistyObject object, int[] centers)
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{
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centers[0] = object.getCubitFaceStickerIndex( 9,0); // UF
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centers[1] = object.getCubitFaceStickerIndex( 6,0); // UR
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centers[2] = object.getCubitFaceStickerIndex( 7,0); // UB
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centers[3] = object.getCubitFaceStickerIndex( 8,0); // UL
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centers[4] = object.getCubitFaceStickerIndex(13,0); // DF
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centers[5] = object.getCubitFaceStickerIndex(10,1); // DR
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centers[6] = object.getCubitFaceStickerIndex(11,0); // DB
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centers[7] = object.getCubitFaceStickerIndex(12,0); // DL
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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public int tablebaseIndex(TwistyObject object)
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{
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int[][] corners = new int[6][4];
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int[] centers = new int[8];
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getCorners(object,corners);
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getCenters(object,centers);
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int result1 = checkAllCentersPresent(centers);
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if( result1<0 ) return result1;
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int result2 = figureOutFaceColors(mFaceColors,centers,corners);
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if( result2<0 ) return result2;
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int result3 = checkAllColorsDifferent();
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if( result3<0 ) return result3;
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354
|
int[] corners_perm = getCornersPermutation(corners);
|
|
355
|
boolean even1 = TablebaseHelpers.permutationIsEven(corners_perm);
|
|
356
|
if( !even1 ) return ERROR_TWO_CORNERS;
|
|
357
|
|
|
358
|
int[] free_centers_perm = getFreeCentersPermutation(centers);
|
|
359
|
boolean even2 = TablebaseHelpers.permutationIsEven(free_centers_perm);
|
|
360
|
if( !even2 ) return ERROR_TWO_CENTERS;
|
|
361
|
|
|
362
|
int[] corners_twist = getCornersTwist(corners_perm, corners);
|
|
363
|
/*
|
|
364
|
android.util.Log.e("D", "faces: "+mFaceColors[0]+" "+mFaceColors[1]+" "+mFaceColors[2]+" "
|
|
365
|
+mFaceColors[3]+" "+mFaceColors[4]+" "+mFaceColors[5]+" "+mFaceColors[6]+" "+mFaceColors[7]);
|
|
366
|
|
|
367
|
android.util.Log.e("D", "corn perm: "+corners_perm[0]+" "+corners_perm[1]+" "+corners_perm[2]+" "
|
|
368
|
+corners_perm[3]+" "+corners_perm[4]+" "+corners_perm[5]);
|
|
369
|
|
|
370
|
android.util.Log.e("D", "corn twist: "+corners_twist[0]+" "+corners_twist[1]+" "+corners_twist[2]+" "
|
|
371
|
+corners_twist[3]+" "+corners_twist[4]+" "+corners_twist[5]);
|
|
372
|
*/
|
|
373
|
int totalTwist = getTotalTwist(corners_twist);
|
|
374
|
if( totalTwist<0 ) return ERROR_CORNER_TWIST;
|
|
375
|
|
|
376
|
int corners_perm_num = TablebaseHelpers.computeEvenPermutationNum(corners_perm);
|
|
377
|
int centers_perm_num = TablebaseHelpers.computeEvenPermutationNum(free_centers_perm);
|
|
378
|
|
|
379
|
return centers_perm_num + 12*(totalTwist + 32*corners_perm_num);
|
|
380
|
}
|
|
381
|
|
|
382
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
|
383
|
|
|
384
|
private int getColorIndex4(int face)
|
|
385
|
{
|
|
386
|
switch(mFaceColors[face])
|
|
387
|
{
|
|
388
|
case 0: return R.string.color_violet4;
|
|
389
|
case 1: return R.string.color_grey4;
|
|
390
|
case 2: return R.string.color_blue4;
|
|
391
|
case 3: return R.string.color_red4;
|
|
392
|
case 4: return R.string.color_orange4;
|
|
393
|
case 5: return R.string.color_green4;
|
|
394
|
case 6: return R.string.color_white4;
|
|
395
|
case 7: return R.string.color_yellow4;
|
|
396
|
}
|
|
397
|
|
|
398
|
return -1;
|
|
399
|
}
|
|
400
|
|
|
401
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
|
402
|
|
|
403
|
private int getColorIndex3(int face)
|
|
404
|
{
|
|
405
|
switch(mFaceColors[face])
|
|
406
|
{
|
|
407
|
case 0: return R.string.color_violet3;
|
|
408
|
case 1: return R.string.color_grey3;
|
|
409
|
case 2: return R.string.color_blue3;
|
|
410
|
case 3: return R.string.color_red3;
|
|
411
|
case 4: return R.string.color_orange3;
|
|
412
|
case 5: return R.string.color_green3;
|
|
413
|
case 6: return R.string.color_white3;
|
|
414
|
case 7: return R.string.color_yellow3;
|
|
415
|
}
|
|
416
|
|
|
417
|
return -1;
|
|
418
|
}
|
|
419
|
|
|
420
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
|
421
|
|
|
422
|
private int getColorIndex2(int face)
|
|
423
|
{
|
|
424
|
switch(face)
|
|
425
|
{
|
|
426
|
case 0: return R.string.color_violet2;
|
|
427
|
case 1: return R.string.color_grey2;
|
|
428
|
case 2: return R.string.color_blue2;
|
|
429
|
case 3: return R.string.color_red2;
|
|
430
|
case 4: return R.string.color_orange2;
|
|
431
|
case 5: return R.string.color_green2;
|
|
432
|
case 6: return R.string.color_white2;
|
|
433
|
case 7: return R.string.color_yellow2;
|
|
434
|
}
|
|
435
|
|
|
436
|
return -1;
|
|
437
|
}
|
|
438
|
|
|
439
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
|
440
|
|
|
441
|
private String centerError(Resources res, int face)
|
|
442
|
{
|
|
443
|
String color = res.getString(getColorIndex2(face));
|
|
444
|
return res.getString(R.string.solver_generic_missing_center,color);
|
|
445
|
}
|
|
446
|
|
|
447
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
|
448
|
|
|
449
|
private String cornerError(Resources res, int f1, int f2)
|
|
450
|
{
|
|
451
|
String c1 = res.getString(getColorIndex3(f1));
|
|
452
|
String c2 = res.getString(getColorIndex4(f2));
|
|
453
|
return res.getString(R.string.solver_generic_missing_corner2,c1,c2);
|
|
454
|
}
|
|
455
|
|
|
456
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
|
457
|
|
|
458
|
public String error(int index, Resources res)
|
|
459
|
{
|
|
460
|
switch(index)
|
|
461
|
{
|
|
462
|
case ERROR_CORNER_FR_MISSING: return cornerError(res,1,4);
|
|
463
|
case ERROR_CORNER_BR_MISSING: return cornerError(res,1,6);
|
|
464
|
case ERROR_CORNER_BL_MISSING: return cornerError(res,3,6);
|
|
465
|
case ERROR_CORNER_FL_MISSING: return cornerError(res,3,4);
|
|
466
|
case ERROR_CORNER_TO_MISSING: return cornerError(res,1,3);
|
|
467
|
case ERROR_CORNER_BO_MISSING: return cornerError(res,4,6);
|
|
468
|
|
|
469
|
case ERROR_CENTER_0_MISSING : return centerError(res,0);
|
|
470
|
case ERROR_CENTER_1_MISSING : return centerError(res,1);
|
|
471
|
case ERROR_CENTER_2_MISSING : return centerError(res,2);
|
|
472
|
case ERROR_CENTER_3_MISSING : return centerError(res,3);
|
|
473
|
case ERROR_CENTER_4_MISSING : return centerError(res,4);
|
|
474
|
case ERROR_CENTER_5_MISSING : return centerError(res,5);
|
|
475
|
case ERROR_CENTER_6_MISSING : return centerError(res,6);
|
|
476
|
case ERROR_CENTER_7_MISSING : return centerError(res,7);
|
|
477
|
|
|
478
|
case ERROR_TWO_CORNERS : return res.getString(R.string.solver_generic_two_corners);
|
|
479
|
case ERROR_TWO_CENTERS : return res.getString(R.string.solver_generic_two_centers);
|
|
480
|
case ERROR_CORNER_TWIST : return res.getString(R.string.solver_generic_corner_twist);
|
|
481
|
case ERROR_CORNERS_CANNOT : return res.getString(R.string.solver_generic_corners_cannot);
|
|
482
|
}
|
|
483
|
|
|
484
|
return null;
|
|
485
|
}
|
|
486
|
|
|
487
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
|
488
|
|
|
489
|
public int[][] solution(int index, Resources res)
|
|
490
|
{
|
|
491
|
if( mSolver==null )
|
|
492
|
{
|
|
493
|
mSolver = ImplementedTablebasesList.createPacked(res, ObjectSignatures.DIAM_2);
|
|
494
|
}
|
|
495
|
|
|
496
|
return mSolver!=null ? mSolver.solution(index,null) : null;
|
|
497
|
}
|
|
498
|
}
|
|
499
|
|