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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.objectlib.tablebases;
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import static org.distorted.objectlib.main.TwistyObject.SQ2;
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import android.content.res.Resources;
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import org.distorted.library.type.Static3D;
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///////////////////////////////////////////////////////////////////////////////////////////////////
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public class TBPyraminxDiamond extends TablebasesAbstract
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{
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private static final int[][] CORNER_QUATS =
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{
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{0,6,5,4},
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{0,4,5,6},
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{0,3,2,1},
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{0,9,8,7},
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{0,7,8,9},
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{0,1,2,3},
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};
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private static final int[][][] CENTER_QUATS =
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{
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{ {21,15, 0}, {10,13, 5}, {17, 9, 3}, {16,18,11}, {19, 1, 6}, { 2,12,23}, { 7,14, 4}, { 8,20,22} },
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{ { 5,23,20}, { 0,22,12}, {19,16,14}, { 7,17, 1}, { 4,11, 9}, {10, 8,15}, { 6, 3,18}, {21, 2,13} },
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{ { 1,17, 7}, {14,16,19}, { 0,12,22}, { 5,20,23}, {13, 2,21}, { 6,18, 3}, {15, 8,10}, { 4, 9,11} },
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{ {18,11,16}, { 9, 3,17}, { 5,10,13}, { 0,21,15}, {20,22, 8}, { 4, 7,14}, {12,23, 2}, { 6,19, 1} },
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{ { 4,19, 3}, { 6, 7,11}, {15, 2,20}, {13, 8,12}, { 0,10,23}, { 1,16, 9}, { 5,21,22}, {14,17,18} },
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{ {10, 2,22}, {21, 8,23}, { 4, 1,18}, { 6,14, 9}, { 7,16, 3}, { 0,13,20}, {19,17,11}, { 5,15,12} },
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{ { 6,14, 9}, { 4, 1,18}, {21, 8,23}, {10, 2,22}, { 5,15,12}, {19,17,11}, { 0,13,20}, { 7,16, 3} },
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{ {12, 8,13}, {20, 2,15}, { 6,11, 7}, { 4, 3,19}, {18,17,14}, { 5,22,21}, { 9,16, 1}, { 0,23,10} },
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};
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///////////////////////////////////////////////////////////////////////////////////////////////////
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public TBPyraminxDiamond()
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{
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super();
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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public TBPyraminxDiamond(Resources res)
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{
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super(res, 0);
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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int[][] getBasicAngles()
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{
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int[] tmp = {4,4,4};
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return new int[][] { tmp,tmp,tmp };
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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Static3D[] getRotationAxis()
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{
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return new Static3D[]
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{
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new Static3D(SQ2/2, 0, SQ2/2),
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new Static3D( 0, 1, 0),
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new Static3D(SQ2/2, 0,-SQ2/2)
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};
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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float[][] getPosition()
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{
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float B0 = 1.5f*SQ2;
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float C0 = 1.5f;
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float A = 1.03f;
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float B1 = 0.5f*SQ2*A;
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float C1 = A;
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return new float[][]
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{
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{ 0, B0, 0 },
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{ 0,-B0, 0 },
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{ C0, 0, C0 },
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{ C0, 0,-C0 },
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{-C0, 0, C0 },
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{-C0, 0,-C0 },
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{ 0, B1, C1 },
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{ 0, B1,-C1 },
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{ 0,-B1, C1 },
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{ 0,-B1,-C1 },
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{ C1, B1, 0 },
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{ C1,-B1, 0 },
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{-C1, B1, 0 },
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{-C1,-B1, 0 },
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};
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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float[][] getCuts()
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{
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float C = 0.5f*SQ2;
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float[] cut = { -C,C};
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return new float[][] { cut,cut,cut };
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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boolean[][] getRotatable()
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{
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boolean[] tmp = {true,false,true};
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return new boolean[][] { tmp,tmp,tmp };
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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// specifically for the tablebase
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///////////////////////////////////////////////////////////////////////////////////////////////////
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// 4^6 - corner twists; 8! - center permutation; divide by 2 because parity of permutation must
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// agree with parity of total twists = (4^6)*8! / 2 = 82.575.360
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int getSize()
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{
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return 82575360;
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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int getMinScramble()
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{
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return 8;
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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private int findIndex1(int[] table, int entry)
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{
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int len = table.length;
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for(int i=0; i<len; i++)
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if( table[i]==entry ) return i;
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return -1;
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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private int findIndex2(int[][] table, int entry)
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{
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int len = table.length;
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for(int i=0; i<len; i++)
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{
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int[] t = table[i];
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if( t[0]==entry || t[1]==entry || t[2]==entry ) return i;
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}
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return -1;
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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public int[] getQuats(int index)
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{
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int[] quats = new int[14];
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int[] perm = new int[8];
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int[] twist = new int[6];
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int centers_perm_num = index/2048;
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int total_twist = index%2048;
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TablebaseHelpers.getPermutationFromNum(perm,8,centers_perm_num);
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boolean even = TablebaseHelpers.permutationIsEven(perm);
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for(int i=0; i<5; i++) { twist[i] = total_twist%4; total_twist /=4; }
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int total = twist[0]+twist[1]+twist[2]+twist[3]+twist[4]+(even?0:1);
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twist[5] = 2*(1-total_twist) + (total%2);
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for(int i=0; i<6; i++) quats[i ] = CORNER_QUATS[i][twist[i]];
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for(int i=0; i<8; i++) quats[i+6] = CENTER_QUATS[i][perm[i]][0];
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return quats;
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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public int getIndex(int[] quats)
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{
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int[] twist = new int[6];
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int[] perm = new int[8];
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for(int i=0; i<6; i++) twist[i] = findIndex1(CORNER_QUATS[i],quats[i]);
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for(int i=0; i<8; i++) perm[i] = findIndex2(CENTER_QUATS[i],quats[i]);
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int centers_perm_num = TablebaseHelpers.computePermutationNum(perm);
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int total_twist = twist[0]+ 4*(twist[1]+ 4*(twist[2]+ 4*(twist[3]+ 4*(twist[4]+ 4*(twist[5]>1 ? 0:1)))));
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return total_twist + 2048*centers_perm_num;
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}
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}
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