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f0336037
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Leszek Koltunski
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///////////////////////////////////////////////////////////////////////////////////////////////////
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// Copyright 2020 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 free software: you can redistribute it and/or modify //
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// it under the terms of the GNU General Public License as published by //
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// the Free Software Foundation, either version 2 of the License, or //
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// (at your option) any later version. //
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// //
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// Magic Cube is distributed in the hope that it will be useful, //
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// but WITHOUT ANY WARRANTY; without even the implied warranty of //
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //
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// GNU General Public License for more details. //
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// //
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// You should have received a copy of the GNU General Public License //
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// along with Magic Cube. If not, see <http://www.gnu.org/licenses/>. //
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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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318c0a7d
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Leszek Koltunski
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import org.distorted.objectlib.main.ObjectType;
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3f7a4363
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Leszek Koltunski
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import org.distorted.objectlib.main.TwistyObject;
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f0336037
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Leszek Koltunski
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import org.distorted.main.R;
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fcd5b990
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Leszek Koltunski
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import org.distorted.screens.ScreenList;
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import org.distorted.screens.RubikScreenSolver;
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f0336037
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Leszek Koltunski
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///////////////////////////////////////////////////////////////////////////////////////////////////
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a304ee64
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Leszek Koltunski
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public class SolverMain implements Runnable
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f0336037
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Leszek Koltunski
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{
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c494476f
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Leszek Koltunski
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private final Resources mRes;
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ecf3f149
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Leszek Koltunski
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private final TwistyObject mObject;
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f0336037
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Leszek Koltunski
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///////////////////////////////////////////////////////////////////////////////////////////////////
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ecf3f149
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Leszek Koltunski
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public SolverMain(Resources res, TwistyObject object)
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f0336037
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Leszek Koltunski
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{
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ecf3f149
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mRes = res;
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mObject= object;
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f0336037
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Leszek Koltunski
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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46a961fd
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Leszek Koltunski
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// certain objects have certain cubits locked - for example, the Cube3's centers of
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// sides always have the same color.
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// If a certain cubit is locked, return the color (index into it's FACE_COLORS array) it
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// must have. Otherwise return -1.
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public static int cubitIsLocked(ObjectType object, int cubit)
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Leszek Koltunski
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{
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318c0a7d
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if( object == ObjectType.CUBE_3 )
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{
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if( cubit==21 ) return 0; // center of the right face
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if( cubit== 4 ) return 1; // center of the left face
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if( cubit==15 ) return 2; // center of the up face
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if( cubit==10 ) return 3; // center of the bottom face
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if( cubit==13 ) return 4; // center of the front face
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if( cubit==12 ) return 5; // center of the back face
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}
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return -1;
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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f0336037
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Leszek Koltunski
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private void solveCube3(RubikScreenSolver solver)
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f0336037
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Leszek Koltunski
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{
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373fa45f
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String result;
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if( !org.distorted.solvers.cube3.Search.prepare(mRes) )
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result= "Error 9";
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else
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ecf3f149
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{
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String objectPosition = prepareCube3position();
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result = org.distorted.solvers.cube3.Search.solution(objectPosition, 24, 20);
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}
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373fa45f
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Leszek Koltunski
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if (result.contains("Error"))
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{
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switch (result.charAt(result.length() - 1))
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{
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case '1': result = mRes.getString(R.string.solver_cube3_error1); break;
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case '2': result = mRes.getString(R.string.solver_cube3_error2); break;
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case '3': result = mRes.getString(R.string.solver_cube3_error3); break;
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case '4': result = mRes.getString(R.string.solver_cube3_error4); break;
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case '5': result = mRes.getString(R.string.solver_cube3_error5); break;
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case '6': result = mRes.getString(R.string.solver_cube3_error6); break;
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case '7': result = mRes.getString(R.string.solver_cube3_error7); break;
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case '8': result = mRes.getString(R.string.solver_cube3_error8); break;
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case '9': result = mRes.getString(R.string.solver_cube3_error9); break;
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}
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solver.displayErrorDialog(result);
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}
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else
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{
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solver.setSolved(result);
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}
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f0336037
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Leszek Koltunski
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}
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ecf3f149
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Leszek Koltunski
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///////////////////////////////////////////////////////////////////////////////////////////////////
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// order: Up --> Right --> Front --> Down --> Left --> Back
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// (because the first implemented Solver - the two-phase Cube3 one - expects such order)
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//
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// Solved 3x3x3 Cube maps to "UUUUUUUUURRRRRRRRRFFFFFFFFFDDDDDDDDDLLLLLLLLLBBBBBBBBB"
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//
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// s : size of the cube; let index = a*s + b (i.e. a,b = row,column)
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//
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// Up : index --> b<s-1 ? (s-1)*(s+4b)+a : 6*s*s -13*s +8 +a
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// Right : index --> 6*s*s - 12*s + 7 - index
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// Front : index --> if b==0 : s*s - 1 - index
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// if b==s-1: 6*s*s -11*s +6 - index
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// else
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// a==0: s*s + s-1 + 4*(b-1)*(s-1) + 2*(s-2) + s
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// else: s*s + s-1 + 4*(b-1)*(s-1) + 2*(s-1-a)
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// Down : index --> b==0 ? (s-1-a) : s*s + s-1 + 4*(b-1)*(s-1) - a
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// Left : index --> (s-1-a)*s + b
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// Back : index --> if b==s-1: s*(s-1-a)
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// if b==0 : 5*s*s -12*s + 8 + (s-1-a)*s
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// else
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// if a==s-1: s*s + 4*(s-2-b)*(s-1)
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// else : s*s + 4*(s-2-b)*(s-1) + s + (s-2-a)*2
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private String prepareCube3position()
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{
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StringBuilder objectString = new StringBuilder();
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int layers = mObject.getNumLayers();
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int len = layers*layers;
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int cubitIndex, row, col, color,face;
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final int RIGHT= 0;
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final int LEFT = 1;
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final int UP = 2;
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final int DOWN = 3;
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final int FRONT= 4;
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final int BACK = 5;
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// 'I' - interior, theoretically can happen
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final char[] FACE_NAMES = { 'R', 'L', 'U', 'D', 'F', 'B', 'I'};
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face = UP;
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for(int i=0; i<len; i++)
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{
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row = i/layers;
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col = i%layers;
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cubitIndex = col<layers-1 ? (layers-1)*(layers+4*col) + row : 6*layers*layers - 13*layers + 8 + row;
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color = mObject.getCubitFaceColorIndex(cubitIndex,face);
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objectString.append(FACE_NAMES[color]);
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}
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face = RIGHT;
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for(int i=0; i<len; i++)
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{
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cubitIndex = 6*layers*layers - 12*layers +7 - i;
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color = mObject.getCubitFaceColorIndex(cubitIndex,face);
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objectString.append(FACE_NAMES[color]);
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}
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face = FRONT;
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for(int i=0; i<len; i++)
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{
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row = i/layers;
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col = i%layers;
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if( col==layers-1 ) cubitIndex = 6*layers*layers - 11*layers + 6 -i;
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else if( col==0 ) cubitIndex = layers*layers - 1 - i;
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else
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{
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if( row==0 ) cubitIndex = layers*layers + layers-1 + 4*(col-1)*(layers-1) + 2*(layers-2) + layers;
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else cubitIndex = layers*layers + layers-1 + 4*(col-1)*(layers-1) + 2*(layers-1-row);
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}
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color = mObject.getCubitFaceColorIndex(cubitIndex,face);
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objectString.append(FACE_NAMES[color]);
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}
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face = DOWN;
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for(int i=0; i<len; i++)
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{
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row = i/layers;
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col = i%layers;
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cubitIndex = col==0 ? layers-1-row : layers*layers + layers-1 + 4*(col-1)*(layers-1) - row;
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color = mObject.getCubitFaceColorIndex(cubitIndex,face);
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objectString.append(FACE_NAMES[color]);
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}
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face = LEFT;
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for(int i=0; i<len; i++)
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{
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row = i/layers;
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col = i%layers;
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cubitIndex = (layers-1-row)*layers + col;
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color = mObject.getCubitFaceColorIndex(cubitIndex,face);
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objectString.append(FACE_NAMES[color]);
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}
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face = BACK;
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for(int i=0; i<len; i++)
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{
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row = i/layers;
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col = i%layers;
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if( col==layers-1 ) cubitIndex = layers*(layers-1-row);
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else if( col==0 ) cubitIndex = 5*layers*layers - 12*layers + 8 + (layers-1-row)*layers;
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else
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{
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if( row==layers-1 ) cubitIndex = layers*layers + 4*(layers-2-col)*(layers-1);
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else cubitIndex = layers*layers + 4*(layers-2-col)*(layers-1) + layers + 2*(layers-2-row);
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}
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color = mObject.getCubitFaceColorIndex(cubitIndex,face);
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objectString.append(FACE_NAMES[color]);
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}
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return objectString.toString();
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}
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f0336037
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Leszek Koltunski
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///////////////////////////////////////////////////////////////////////////////////////////////////
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373fa45f
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Leszek Koltunski
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private void interruptCube3()
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f0336037
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Leszek Koltunski
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{
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org.distorted.solvers.cube3.Search.interrupt();
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}
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373fa45f
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Leszek Koltunski
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///////////////////////////////////////////////////////////////////////////////////////////////////
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public void start()
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{
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Thread thr = new Thread(this);
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thr.start();
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}
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f0336037
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Leszek Koltunski
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///////////////////////////////////////////////////////////////////////////////////////////////////
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public void run()
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{
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f5da732a
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Leszek Koltunski
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RubikScreenSolver solver = (RubikScreenSolver) ScreenList.SVER.getScreenClass();
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f0336037
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Leszek Koltunski
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c4175d85
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Leszek Koltunski
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if( mObject.getObjectType()== ObjectType.CUBE_3 )
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f0336037
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Leszek Koltunski
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{
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373fa45f
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Leszek Koltunski
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solveCube3(solver);
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f0336037
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Leszek Koltunski
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}
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else
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{
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373fa45f
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Leszek Koltunski
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solver.displayErrorDialog(mRes.getString(R.string.solver_generic_error1));
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f0336037
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Leszek Koltunski
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}
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}
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}
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