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b8519939
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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.objectlib.tablebases;
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import static org.distorted.objectlib.main.TwistyObject.SQ2;
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ccd8a6f2
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Leszek Koltunski
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import static org.distorted.objectlib.main.TwistyObject.SQ3;
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b8519939
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Leszek Koltunski
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import static org.distorted.objectlib.main.TwistyObject.SQ6;
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import android.content.res.Resources;
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import org.distorted.library.type.Static3D;
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74cc695a
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Leszek Koltunski
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import org.distorted.objectlib.R;
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b8519939
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Leszek Koltunski
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///////////////////////////////////////////////////////////////////////////////////////////////////
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public class TablebasesPyraminx extends TablebasesAbstract
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{
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d8003f3a
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Leszek Koltunski
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public static final int[][] EDGE_QUATS = new int[][]
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{
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{ 0,10}, // even-odd quat (i.e. even-odd twist of the relevant edge piece)
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{ 1, 7},
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{ 4, 8},
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{ 2, 6},
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{ 3, 5},
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f32c546d
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{11, 9}
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};
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b8519939
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Leszek Koltunski
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///////////////////////////////////////////////////////////////////////////////////////////////////
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public TablebasesPyraminx()
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{
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super();
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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public TablebasesPyraminx(Resources res)
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{
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super(res, R.raw.pyra_3_tablebase);
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Leszek Koltunski
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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int[][] getBasicAngles()
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{
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int[] tmp = {3,3};
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return new int[][] { tmp,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( 0,-SQ3/3,-SQ6/3),
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new Static3D( 0,-SQ3/3, SQ6/3),
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new Static3D( SQ6/3, SQ3/3, 0),
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new Static3D(-SQ6/3, SQ3/3, 0),
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};
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Leszek Koltunski
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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float[][] getPosition()
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{
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return new float[][]
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{
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{ 0.0f,-SQ2/4, 0.5f},
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{ 0.0f,-SQ2/4,-0.5f},
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{-0.5f, SQ2/4, 0.0f},
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{ 0.5f, SQ2/4, 0.0f},
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{ 0.0f,-SQ2/2, 0.0f}, // index=0 has the quats already set up so that
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{ 0.0f,-SQ2/2, 0.0f}, // all the edges fall into right spots, so here
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{ 0.0f,-SQ2/2, 0.0f}, // they need to be all in one place
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{ 0.0f,-SQ2/2, 0.0f},
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{ 0.0f,-SQ2/2, 0.0f},
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{ 0.0f,-SQ2/2, 0.0f},
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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[] cut = { 0.25f*(SQ6/3) };
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return new float[][] { cut,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 = new boolean[] {false,true};
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return new boolean[][] { tmp,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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int getSize()
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{
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return 933120; // see https://www.jaapsch.net/puzzles/pyraminx.htm
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}
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b9f8919d
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///////////////////////////////////////////////////////////////////////////////////////////////////
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public static void getEdgePermutation(int[] output, int[] quats, int index)
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{
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for(int i=0; i<6; i++ )
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{
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int quat = quats[i+index];
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for(int j=0; j<6; j++)
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{
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int[] edge = EDGE_QUATS[j];
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if( quat==edge[0] || quat==edge[1] ) { output[i]=j; break; }
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}
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}
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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public static void getEdgeTwist(int[] output, int[] quats, int index)
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{
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for(int i=0; i<6; i++)
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{
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int quat = quats[i+index];
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for(int j=0; j<6; j++)
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{
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int[] edge = EDGE_QUATS[j];
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if( quat==edge[0] ) { output[i]=0; break; }
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if( quat==edge[1] ) { output[i]=1; break; }
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}
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}
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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private void getEdgeQuats(int twist, int[] perm, int[] output)
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{
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int totalTwist = 0;
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for(int i=0; i<5; i++)
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{
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int p = perm[i];
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int t = (twist%2);
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twist/=2;
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output[i+4] = EDGE_QUATS[p][t];
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totalTwist += t;
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}
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int p = perm[5];
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int t = (totalTwist%2)==0 ? 0:1;
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output[9] = EDGE_QUATS[p][t];
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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private int getVertexTwist(int[] quats)
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{
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int twist = 0;
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if( quats[3]==5 ) twist += 1;
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if( quats[3]==6 ) twist += 2;
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twist *= 3;
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if( quats[2]==7 ) twist += 1;
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if( quats[2]==8 ) twist += 2;
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twist *= 3;
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if( quats[1]==1 ) twist += 1;
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if( quats[1]==2 ) twist += 2;
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twist *= 3;
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if( quats[0]==3 ) twist += 1;
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if( quats[0]==4 ) twist += 2;
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return twist;
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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private void getVertexQuats(int twist, int[] output)
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{
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switch(twist%3)
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{
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case 0: output[0]=0; break;
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case 1: output[0]=3; break;
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case 2: output[0]=4; break;
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}
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twist /= 3;
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switch(twist%3)
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{
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case 0: output[1]=0; break;
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case 1: output[1]=1; break;
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case 2: output[1]=2; break;
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}
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twist /= 3;
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switch(twist%3)
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{
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case 0: output[2]=0; break;
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case 1: output[2]=7; break;
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case 2: output[2]=8; break;
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}
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twist /= 3;
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switch(twist%3)
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{
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case 0: output[3]=0; break;
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case 1: output[3]=5; break;
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case 2: output[3]=6; break;
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}
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b9f8919d
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Leszek Koltunski
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}
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b8519939
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Leszek Koltunski
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///////////////////////////////////////////////////////////////////////////////////////////////////
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f32c546d
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Leszek Koltunski
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public int[] getQuats(int index)
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{
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int vertexTwist = (index%81);
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index /= 81;
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int edgeTwist = (index%32);
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int perm_num = index/32;
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int[] quats = new int[10];
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getVertexQuats(vertexTwist,quats);
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int[] permutation = new int[6];
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522d858e
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TablebaseHelpers.getEvenPermutationFromNum(permutation,perm_num);
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getEdgeQuats(edgeTwist,permutation,quats);
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return quats;
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b8519939
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Leszek Koltunski
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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f32c546d
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public int getIndex(int[] quats)
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{
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int vertexTwist = getVertexTwist(quats);
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int[] permutation = new int[6];
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getEdgePermutation(permutation,quats,4);
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int[] twist = new int[6];
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getEdgeTwist(twist,quats,4);
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int edgeTwist = twist[0]+ 2*(twist[1]+ 2*(twist[2]+ 2*(twist[3]+ 2*twist[4])));
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int perm_num = TablebaseHelpers.computeEvenPermutationNum(permutation);
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return vertexTwist + 81*(edgeTwist + 32*perm_num);
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}
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}
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