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18354673
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Leszek Koltunski
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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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b4f45fdc
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Leszek Koltunski
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import static org.distorted.objectlib.tablebases.TBSkewb.FREE;
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18354673
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Leszek Koltunski
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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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c76be0a6
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Leszek Koltunski
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import org.distorted.objectlib.tablebases.TBSkewb;
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cff92952
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Leszek Koltunski
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import org.distorted.objectlib.tablebases.TablebaseHelpers;
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18354673
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Leszek Koltunski
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import org.distorted.objectlib.tablebases.TablebasesAbstract;
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///////////////////////////////////////////////////////////////////////////////////////////////////
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public class SolverSkewb extends SolverTablebase
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{
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private static final int ERROR_CORNER_135_MISSING = -1;
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private static final int ERROR_CORNER_134_MISSING = -2;
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private static final int ERROR_CORNER_125_MISSING = -3;
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private static final int ERROR_CORNER_124_MISSING = -4;
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private static final int ERROR_CORNER_035_MISSING = -5;
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private static final int ERROR_CORNER_034_MISSING = -6;
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private static final int ERROR_CORNER_025_MISSING = -7;
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private static final int ERROR_CORNER_024_MISSING = -8;
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private static final int ERROR_CENTER_0_MISSING = -9;
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private static final int ERROR_CENTER_1_MISSING = -10;
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private static final int ERROR_CENTER_2_MISSING = -11;
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private static final int ERROR_CENTER_3_MISSING = -12;
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private static final int ERROR_CENTER_4_MISSING = -13;
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private static final int ERROR_CENTER_5_MISSING = -14;
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private static final int ERROR_CORNERS_CANNOT = -15;
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private static final int ERROR_CORNER_TWISTED = -16;
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private static final int ERROR_TWO_CENTERS = -17;
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private static final int ERROR_TWO_CORNERS = -18;
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private TablebasesAbstract mSolver;
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cff92952
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Leszek Koltunski
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private final int[] mFaceColors;
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18354673
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Leszek Koltunski
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///////////////////////////////////////////////////////////////////////////////////////////////////
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public SolverSkewb(Resources res, TwistyObject object)
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{
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super(res,object);
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cff92952
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Leszek Koltunski
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mFaceColors = new int[6];
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Leszek Koltunski
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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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cff92952
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Leszek Koltunski
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for(int i=0; i<8; i++)
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for(int j=0; j<3; j++)
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corners[i][j] = object.getCubitFaceStickerIndex(i,j);
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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6a64512e
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Leszek Koltunski
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private int getCenters(TwistyObject object, int[] output)
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cff92952
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Leszek Koltunski
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{
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6a64512e
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Leszek Koltunski
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final int[] map = {4,5,2,3,0,1};
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int[] inverted_perm = new int[6];
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boolean[] present = new boolean[6];
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18354673
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Leszek Koltunski
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cff92952
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for(int i=0; i<6; i++)
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{
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int color = object.getCubitFaceStickerIndex(i+8,0) - 6;
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present[color] = true;
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inverted_perm[i] = map[mFaceColors[color]];
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b4f45fdc
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}
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6a64512e
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Leszek Koltunski
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if( !present[0] ) return ERROR_CENTER_0_MISSING;
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if( !present[1] ) return ERROR_CENTER_1_MISSING;
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if( !present[2] ) return ERROR_CENTER_2_MISSING;
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if( !present[3] ) return ERROR_CENTER_3_MISSING;
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if( !present[4] ) return ERROR_CENTER_4_MISSING;
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if( !present[5] ) return ERROR_CENTER_5_MISSING;
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TablebaseHelpers.invertPermutation(inverted_perm,output);
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return 0;
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18354673
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Leszek Koltunski
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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cff92952
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private int commonCornerColor(int[] c1, int[] c2)
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Leszek Koltunski
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{
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cff92952
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Leszek Koltunski
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int theSame = 0;
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int index = 0;
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for(int i=0; i<3; i++)
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for(int j=0; j<3; j++)
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if( c1[i]==c2[j] )
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{
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index = i;
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theSame++;
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}
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return theSame==1 ? c1[index] : ERROR_CORNERS_CANNOT;
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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private int computeFaceColors(int[][] corners, int[] output)
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{
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6a64512e
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Leszek Koltunski
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final int[][] corner_indices = { {0,3},{5,6},{0,5},{6,3},{0,6},{3,5} };
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cff92952
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Leszek Koltunski
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for(int i=0; i<6; i++)
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{
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6a64512e
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int c1 = corner_indices[i][0];
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int c2 = corner_indices[i][1];
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cff92952
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Leszek Koltunski
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output[i] = commonCornerColor(corners[c1],corners[c2]);
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if( output[i]<0 ) return ERROR_CORNERS_CANNOT;
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}
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18354673
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Leszek Koltunski
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return 0;
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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private boolean cornerIs(int[] corner, int f0, int f1, int f2)
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{
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Leszek Koltunski
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int c0 = mFaceColors[f0];
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int c1 = mFaceColors[f1];
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int c2 = mFaceColors[f2];
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cff92952
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Leszek Koltunski
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return ( (corner[0]==c0 && corner[1]==c1 && corner[2]==c2 ) ||
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(corner[1]==c0 && corner[2]==c1 && corner[0]==c2 ) ||
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(corner[2]==c0 && corner[0]==c1 && corner[1]==c2 ) );
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18354673
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Leszek Koltunski
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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cff92952
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Leszek Koltunski
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private int checkAllCornersPresent(int[][] corners)
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18354673
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Leszek Koltunski
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{
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cff92952
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Leszek Koltunski
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boolean[] present = new boolean[8];
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for(int i=0; i<8; i++)
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{
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if( cornerIs(corners[i],4,2,0) ) present[0]=true;
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if( cornerIs(corners[i],2,5,0) ) present[1]=true;
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if( cornerIs(corners[i],3,4,0) ) present[2]=true;
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if( cornerIs(corners[i],5,3,0) ) present[3]=true;
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if( cornerIs(corners[i],1,2,4) ) present[4]=true;
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if( cornerIs(corners[i],5,2,1) ) present[5]=true;
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if( cornerIs(corners[i],4,3,1) ) present[6]=true;
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if( cornerIs(corners[i],1,3,5) ) present[7]=true;
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}
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if( !present[0] ) return ERROR_CORNER_024_MISSING;
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if( !present[1] ) return ERROR_CORNER_025_MISSING;
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if( !present[2] ) return ERROR_CORNER_034_MISSING;
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if( !present[3] ) return ERROR_CORNER_035_MISSING;
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if( !present[4] ) return ERROR_CORNER_124_MISSING;
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if( !present[5] ) return ERROR_CORNER_125_MISSING;
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if( !present[6] ) return ERROR_CORNER_134_MISSING;
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if( !present[7] ) return ERROR_CORNER_135_MISSING;
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18354673
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Leszek Koltunski
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cff92952
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Leszek Koltunski
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return 0;
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18354673
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Leszek Koltunski
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}
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cff92952
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Leszek Koltunski
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///////////////////////////////////////////////////////////////////////////////////////////////////
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14cf0761
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Leszek Koltunski
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private int retFreeCornerPermutation(int[] perm, int[][] corners)
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cff92952
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Leszek Koltunski
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{
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14cf0761
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Leszek Koltunski
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perm[0] = -1;
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cff92952
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Leszek Koltunski
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perm[1] = -1;
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perm[2] = -1;
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14cf0761
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Leszek Koltunski
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perm[3] = -1;
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cff92952
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Leszek Koltunski
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for(int i=0; i<4; i++)
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{
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b4f45fdc
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Leszek Koltunski
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int[] cor = corners[FREE[i]];
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cff92952
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Leszek Koltunski
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14cf0761
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Leszek Koltunski
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if( cornerIs(cor,2,5,0) ) perm[0] = i;
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if( cornerIs(cor,3,4,0) ) perm[1] = i;
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if( cornerIs(cor,1,2,4) ) perm[2] = i;
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if( cornerIs(cor,1,3,5) ) perm[3] = i;
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cff92952
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Leszek Koltunski
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}
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14cf0761
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Leszek Koltunski
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if( perm[0]==-1 ) return ERROR_CORNER_025_MISSING;
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if( perm[1]==-1 ) return ERROR_CORNER_034_MISSING;
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if( perm[2]==-1 ) return ERROR_CORNER_124_MISSING;
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if( perm[3]==-1 ) return ERROR_CORNER_135_MISSING;
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cff92952
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Leszek Koltunski
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18354673
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Leszek Koltunski
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return 0;
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}
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14cf0761
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Leszek Koltunski
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///////////////////////////////////////////////////////////////////////////////////////////////////
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cff92952
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Leszek Koltunski
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14cf0761
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Leszek Koltunski
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private int retCornerPerm(int index, int[] perm)
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{
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switch(index)
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{
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case 0: return 0;
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b4f45fdc
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Leszek Koltunski
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case 1: return FREE[perm[0]];
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case 2: return FREE[perm[1]];
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14cf0761
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Leszek Koltunski
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case 3: return 3;
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b4f45fdc
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Leszek Koltunski
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case 4: return FREE[perm[2]];
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14cf0761
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Leszek Koltunski
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case 5: return 5;
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case 6: return 6;
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b4f45fdc
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Leszek Koltunski
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case 7: return FREE[perm[3]];
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14cf0761
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Leszek Koltunski
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}
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cff92952
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Leszek Koltunski
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14cf0761
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Leszek Koltunski
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return -1;
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}
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cff92952
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Leszek Koltunski
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14cf0761
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Leszek Koltunski
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///////////////////////////////////////////////////////////////////////////////////////////////////
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cff92952
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Leszek Koltunski
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14cf0761
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Leszek Koltunski
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private void computeCornerQuats(int[] quats, int[][] corners, int[] perm)
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{
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6a64512e
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Leszek Koltunski
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final int[] zeroeth_face_map = { 4,2,3,5,1,5,4,1 };
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b4f45fdc
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Leszek Koltunski
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int[] twist = new int[8];
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cff92952
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Leszek Koltunski
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| 226 |
14cf0761
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Leszek Koltunski
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for(int i=0; i<8; i++)
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cff92952
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Leszek Koltunski
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{
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| 228 |
6a64512e
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Leszek Koltunski
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int color = mFaceColors[zeroeth_face_map[i]];
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14cf0761
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Leszek Koltunski
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int[] c = corners[retCornerPerm(i,perm)];
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b4f45fdc
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Leszek Koltunski
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if( c[0]==color ) twist[i] = 0;
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else if( c[1]==color ) twist[i] = 1;
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else twist[i] = 2;
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| 234 |
cff92952
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Leszek Koltunski
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}
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b4f45fdc
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Leszek Koltunski
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TBSkewb.fillInQuats(quats,perm,twist);
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cff92952
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Leszek Koltunski
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}
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| 239 |
18354673
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Leszek Koltunski
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///////////////////////////////////////////////////////////////////////////////////////////////////
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public int tablebaseIndex(TwistyObject object)
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{
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| 243 |
cff92952
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Leszek Koltunski
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int[][] corners= new int[8][3];
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int[] centers = new int[6];
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| 245 |
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int[] twist = new int[8];
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| 246 |
14cf0761
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Leszek Koltunski
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int[] freePerm = new int[4];
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int[] quats = new int[8];
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| 248 |
18354673
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Leszek Koltunski
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getCorners(object,corners);
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cff92952
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Leszek Koltunski
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int result1 = computeFaceColors(corners,mFaceColors);
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| 252 |
18354673
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Leszek Koltunski
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if( result1<0 ) return result1;
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cff92952
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Leszek Koltunski
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int result2 = checkAllCornersPresent(corners);
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if( result2<0 ) return result2;
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| 256 |
18354673
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Leszek Koltunski
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| 257 |
6a64512e
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Leszek Koltunski
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int result3 = getCenters(object,centers);
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| 258 |
cff92952
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Leszek Koltunski
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if( result3<0 ) return result3;
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| 259 |
18354673
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Leszek Koltunski
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| 260 |
cff92952
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Leszek Koltunski
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if( !TablebaseHelpers.permutationIsEven(centers) ) return ERROR_TWO_CENTERS;
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| 261 |
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int center_perm_num = TablebaseHelpers.computeEvenPermutationNum(centers);
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| 262 |
18354673
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Leszek Koltunski
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| 263 |
14cf0761
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Leszek Koltunski
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int result4 = retFreeCornerPermutation(freePerm,corners);
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| 264 |
cff92952
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Leszek Koltunski
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if( result4<0 ) return result4;
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| 265 |
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| 266 |
14cf0761
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Leszek Koltunski
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computeCornerQuats(quats,corners,freePerm);
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| 267 |
c76be0a6
|
Leszek Koltunski
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TBSkewb.computeCornerTwists(twist,quats);
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| 268 |
b4f45fdc
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Leszek Koltunski
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| 269 |
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int total = 0;
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| 270 |
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for(int i=0; i<4; i++) total += twist[FREE[i]];
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| 271 |
14cf0761
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Leszek Koltunski
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if( (total%3)!=0 ) return ERROR_CORNER_TWISTED;
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| 272 |
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int totalTwist = twist[0]+ 3*(twist[1]+ 3*(twist[2]+ 3*(twist[3]+ 3*(twist[4]+ 3*(twist[5]+ 3*twist[6])))));
|
| 273 |
cff92952
|
Leszek Koltunski
|
|
| 274 |
4fd36883
|
Leszek Koltunski
|
int locationOfFree0 = TBSkewb.computeLocation(0,quats[1]);
|
| 275 |
cff92952
|
Leszek Koltunski
|
|
| 276 |
14cf0761
|
Leszek Koltunski
|
return center_perm_num+ 360*(totalTwist + 2187*locationOfFree0);
|
| 277 |
18354673
|
Leszek Koltunski
|
}
|
| 278 |
|
|
|
| 279 |
|
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
| 280 |
|
|
|
| 281 |
|
|
private int getColorIndex2(int face)
|
| 282 |
|
|
{
|
| 283 |
|
|
switch(mFaceColors[face])
|
| 284 |
|
|
{
|
| 285 |
|
|
case 0: return R.string.color_yellow2;
|
| 286 |
|
|
case 1: return R.string.color_white2;
|
| 287 |
|
|
case 2: return R.string.color_blue2;
|
| 288 |
|
|
case 3: return R.string.color_green2;
|
| 289 |
|
|
case 4: return R.string.color_red2;
|
| 290 |
|
|
case 5: return R.string.color_orange2;
|
| 291 |
|
|
}
|
| 292 |
|
|
|
| 293 |
|
|
return -1;
|
| 294 |
|
|
}
|
| 295 |
|
|
|
| 296 |
|
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
| 297 |
|
|
|
| 298 |
|
|
private int getColorIndex3(int face)
|
| 299 |
|
|
{
|
| 300 |
|
|
switch(mFaceColors[face])
|
| 301 |
|
|
{
|
| 302 |
|
|
case 0: return R.string.color_yellow3;
|
| 303 |
|
|
case 1: return R.string.color_white3;
|
| 304 |
|
|
case 2: return R.string.color_blue3;
|
| 305 |
|
|
case 3: return R.string.color_green3;
|
| 306 |
|
|
case 4: return R.string.color_red3;
|
| 307 |
|
|
case 5: return R.string.color_orange3;
|
| 308 |
|
|
}
|
| 309 |
|
|
|
| 310 |
|
|
return -1;
|
| 311 |
|
|
}
|
| 312 |
|
|
|
| 313 |
|
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
| 314 |
|
|
|
| 315 |
|
|
private int getColorIndex4(int face)
|
| 316 |
|
|
{
|
| 317 |
|
|
switch(mFaceColors[face])
|
| 318 |
|
|
{
|
| 319 |
|
|
case 0: return R.string.color_yellow4;
|
| 320 |
|
|
case 1: return R.string.color_white4;
|
| 321 |
|
|
case 2: return R.string.color_blue4;
|
| 322 |
|
|
case 3: return R.string.color_green4;
|
| 323 |
|
|
case 4: return R.string.color_red4;
|
| 324 |
|
|
case 5: return R.string.color_orange4;
|
| 325 |
|
|
}
|
| 326 |
|
|
|
| 327 |
|
|
return -1;
|
| 328 |
|
|
}
|
| 329 |
|
|
|
| 330 |
|
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
| 331 |
|
|
|
| 332 |
|
|
private String cornerError(Resources res, int face0, int face1, int face2)
|
| 333 |
|
|
{
|
| 334 |
|
|
int j0 = getColorIndex3(face0);
|
| 335 |
|
|
int j1 = getColorIndex3(face1);
|
| 336 |
|
|
int j2 = getColorIndex4(face2);
|
| 337 |
|
|
|
| 338 |
|
|
String c0 = res.getString(j0);
|
| 339 |
|
|
String c1 = res.getString(j1);
|
| 340 |
|
|
String c2 = res.getString(j2);
|
| 341 |
|
|
|
| 342 |
|
|
return res.getString(R.string.solver_generic_missing_corner,c0,c1,c2);
|
| 343 |
|
|
}
|
| 344 |
|
|
|
| 345 |
|
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
| 346 |
|
|
|
| 347 |
|
|
private String centerError(Resources res, int face)
|
| 348 |
|
|
{
|
| 349 |
|
|
int color = getColorIndex2(face);
|
| 350 |
|
|
String clr= res.getString(color);
|
| 351 |
|
|
return res.getString(R.string.solver_generic_missing_center,clr);
|
| 352 |
|
|
}
|
| 353 |
|
|
|
| 354 |
|
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
| 355 |
|
|
|
| 356 |
|
|
public String error(int index, Resources res)
|
| 357 |
|
|
{
|
| 358 |
|
|
switch(index)
|
| 359 |
|
|
{
|
| 360 |
|
|
case ERROR_CORNER_135_MISSING: return cornerError(res,1,3,5);
|
| 361 |
|
|
case ERROR_CORNER_134_MISSING: return cornerError(res,1,3,4);
|
| 362 |
|
|
case ERROR_CORNER_125_MISSING: return cornerError(res,1,2,5);
|
| 363 |
|
|
case ERROR_CORNER_124_MISSING: return cornerError(res,1,2,4);
|
| 364 |
|
|
case ERROR_CORNER_035_MISSING: return cornerError(res,0,3,5);
|
| 365 |
|
|
case ERROR_CORNER_034_MISSING: return cornerError(res,0,3,4);
|
| 366 |
|
|
case ERROR_CORNER_025_MISSING: return cornerError(res,0,2,5);
|
| 367 |
|
|
case ERROR_CORNER_024_MISSING: return cornerError(res,0,2,4);
|
| 368 |
|
|
|
| 369 |
|
|
case ERROR_CENTER_0_MISSING : return centerError(res,0);
|
| 370 |
|
|
case ERROR_CENTER_1_MISSING : return centerError(res,1);
|
| 371 |
|
|
case ERROR_CENTER_2_MISSING : return centerError(res,2);
|
| 372 |
|
|
case ERROR_CENTER_3_MISSING : return centerError(res,3);
|
| 373 |
|
|
case ERROR_CENTER_4_MISSING : return centerError(res,4);
|
| 374 |
|
|
case ERROR_CENTER_5_MISSING : return centerError(res,5);
|
| 375 |
|
|
|
| 376 |
|
|
case ERROR_CORNERS_CANNOT : return res.getString(R.string.solver_generic_corners_cannot);
|
| 377 |
|
|
case ERROR_CORNER_TWISTED : return res.getString(R.string.solver_generic_corner_twist);
|
| 378 |
|
|
case ERROR_TWO_CENTERS : return res.getString(R.string.solver_generic_two_centers);
|
| 379 |
|
|
case ERROR_TWO_CORNERS : return res.getString(R.string.solver_generic_two_corners);
|
| 380 |
|
|
}
|
| 381 |
|
|
|
| 382 |
|
|
return null;
|
| 383 |
|
|
}
|
| 384 |
|
|
|
| 385 |
|
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
| 386 |
|
|
|
| 387 |
|
|
public int[][] solution(int index, Resources res)
|
| 388 |
|
|
{
|
| 389 |
|
|
if( mSolver==null )
|
| 390 |
|
|
{
|
| 391 |
4fd36883
|
Leszek Koltunski
|
mSolver = ImplementedTablebasesList.createPacked(res,ObjectSignatures.SKEW_2);
|
| 392 |
18354673
|
Leszek Koltunski
|
}
|
| 393 |
|
|
|
| 394 |
|
|
return mSolver!=null ? mSolver.solution(index,null) : null;
|
| 395 |
|
|
}
|
| 396 |
|
|
}
|