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package me.Danker.utils;
import me.Danker.features.puzzlesolvers.BoulderSolver;
import net.minecraft.util.AxisAlignedBB;
import net.minecraft.util.BlockPos;
import net.minecraft.util.Vec3;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashSet;
import java.util.List;
public class BoulderUtils {
public static HashSet<String> seenBoardStates = new HashSet<>();
public static long iterations = 0;
public static int fastestSolution = 10;
/*
CC BY-SA 4.0
Unmodified
Question: https://stackoverflow.com/questions/5617016/
Answer: https://stackoverflow.com/a/53397359
Author: https://stackoverflow.com/users/3647002/gayan-weerakutti
*/
public static char[][] copy(char[][] array) {
return Arrays.stream(array).map(char[]::clone).toArray(char[][]::new);
}
public static char[][] flipVertically(char[][] board) {
char[][] newBoard = new char[7][7];
for (int row = 0; row < 7; row++) {
System.arraycopy(board[6 - row], 0, newBoard[row], 0, 7);
}
return newBoard;
}
public static char[][] flipHorizontally(char[][] board) {
char[][] newBoard = new char[7][7];
for (int row = 0; row < 7; row++) {
for (int column = 0; column < 7; column++) {
newBoard[row][column] = board[row][6 - column];
}
}
return newBoard;
}
public static char[][] rotateClockwise(char[][] board) {
char[][] newBoard = new char[7][7];
for (int row = 0; row < 7; row++) {
for (int column = 0; column < 7; column++) {
newBoard[column][6 - row] = board[row][column];
}
}
return newBoard;
}
public static char[][] removeFirstRow(char[][] board) {
List<char[]> list = new ArrayList<>(Arrays.asList(board));
list.remove(0);
return list.toArray(new char[][]{});
}
public static String toString(char[][] board) {
StringBuilder sb = new StringBuilder();
for (char[] row : board) {
for (char column : row) {
sb.append(column);
}
}
return sb.toString();
}
public static int findSolution(char[][] board, int depth, List<int[]> route) {
if (depth > 9) return 10;
String boardString = toString(board);
if (seenBoardStates.contains(boardString)) return 10; // this line turns 600 million iterations to 700 thousand
seenBoardStates.add(boardString);
if (hasOpenPath(board)) return depth;
char[][] floodFilledBoard = floodFillBottom(board);
List<int[]> newRoute = new ArrayList<>(route);
int solutionLength = 10;
int bestRow = -1;
int bestColumn = -1;
int bestDirection = -1;
for (int row = 0; row < 6; row++) {
for (int column = 0; column < 7; column++) {
iterations++;
if (floodFilledBoard[row][column] == 'X' && isTouchingOpenSpace(floodFilledBoard, row, column)) {
if (canBePushed(floodFilledBoard, row, column, 'u')) {
int solution = findSolution(push(board, row, column, 'u'), depth + 1, add(newRoute, new int[]{row, column, 1}));
if (solution < solutionLength) {
solutionLength = solution;
bestRow = row;
bestColumn = column;
bestDirection = 1;
}
}
if (canBePushed(floodFilledBoard, row, column, 'd')) {
int solution = findSolution(push(board, row, column, 'd'), depth + 1, add(newRoute, new int[]{row, column, 2}));
if (solution < solutionLength) {
solutionLength = solution;
bestRow = row;
bestColumn = column;
bestDirection = 2;
}
}
if (canBePushed(floodFilledBoard, row, column, 'l')) {
int solution = findSolution(push(board, row, column, 'l'), depth + 1, add(newRoute, new int[]{row, column, 3}));
if (solution < solutionLength) {
solutionLength = solution;
bestRow = row;
bestColumn = column;
bestDirection = 3;
}
}
if (canBePushed(floodFilledBoard, row, column, 'r')) {
int solution = findSolution(push(board, row, column, 'r'), depth + 1, add(newRoute, new int[]{row, column, 4}));
if (solution < solutionLength) {
solutionLength = solution;
bestRow = row;
bestColumn = column;
bestDirection = 4;
}
}
}
}
}
if (bestRow != -1) {
newRoute.add(0, new int[]{bestRow, bestColumn, bestDirection});
}
if (solutionLength < fastestSolution) {
fastestSolution = solutionLength;
newRoute.add(newRoute.remove(0)); // dont know why the last one goes first but this fixes it
BoulderSolver.route = new ArrayList<>(newRoute);
}
return solutionLength;
}
public static boolean canBePushed(char[][] floodFilledBoard, int row, int column, char direction) {
switch (direction) {
case 'u':
if (row > 0 && row < 5 && floodFilledBoard[row - 1][column] != 'X' && floodFilledBoard[row + 1][column] == 'O') return true;
break;
case 'd':
if (row > 0 && row < 5 && floodFilledBoard[row - 1][column] == 'O' && floodFilledBoard[row + 1][column] != 'X') return true;
break;
case 'l':
if (column > 0 && column < 6 && floodFilledBoard[row][column - 1] != 'X' && floodFilledBoard[row][column + 1] == 'O') return true;
break;
case 'r':
if (column > 0 && column < 6 && floodFilledBoard[row][column - 1] == 'O' && floodFilledBoard[row][column + 1] != 'X') return true;
break;
}
return false;
}
public static char[][] push(char[][] board, int row, int column, char direction) {
char[][] newBoard = copy(board);
switch (direction) {
case 'u':
newBoard[row - 1][column] = 'X';
break;
case 'd':
newBoard[row + 1][column] = 'X';
break;
case 'l':
newBoard[row][column - 1] = 'X';
break;
case 'r':
newBoard[row][column + 1] = 'X';
}
newBoard[row][column] = '\0';
return newBoard;
}
public static boolean isTouchingOpenSpace(char[][] floodFilledBoard, int row, int column) {
return (row > 0 && floodFilledBoard[row - 1][column] == 'O') ||
(row < 5 && floodFilledBoard[row + 1][column] == 'O') ||
(column > 0 && floodFilledBoard[row][column - 1] == 'O') ||
(column < 6 && floodFilledBoard[row][column + 1] == 'O');
}
public static boolean hasOpenPath(char[][] board) {
char[][] newBoard = floodFillBottom(copy(board));
// Check if flood fill reached top
for (int column = 0; column < 7; column++) {
if (newBoard[0][column] == 'O') return true;
}
return false;
}
public static char[][] floodFillBottom(char[][] board) {
char[][] newBoard = copy(board);
for (int column = 0; column < 7; column++) {
if (newBoard[5][column] == '\0') {
newBoard = floodFill(newBoard, 5, column);
}
}
return newBoard;
}
public static char[][] floodFill(char[][] board, int row, int column) {
if (row < 0 || row > 5 || column < 0 || column > 6) return board;
if (board[row][column] == '\0') {
board[row][column] = 'O';
floodFill(board, row - 1, column);
floodFill(board, row + 1, column);
floodFill(board, row, column - 1);
floodFill(board, row, column + 1);
return board;
}
return board;
}
public static List<int[]> add(List<int[]> list, int[] arrayToAdd) {
List<int[]> newList = new ArrayList<>(list);
newList.add(arrayToAdd);
return newList;
}
public static AxisAlignedBB getBoulder(int row, int column, BlockPos chestLocation, String boulderRoomDirection) {
BlockPos boulderPosition;
switch (boulderRoomDirection) {
case "north":
boulderPosition = chestLocation.add(3 * column - 10, -2, 3 * row + 4);
break;
case "east":
boulderPosition = chestLocation.add(-3 * row - 6, -2, 3 * column - 10);
break;
case "south":
boulderPosition = chestLocation.add(-3 * column + 8, -2, -3 * row - 6);
break;
case "west":
boulderPosition = chestLocation.add(3 * row + 4, -2, -3 * column + 8);
break;
default:
return null;
}
return new AxisAlignedBB(boulderPosition.getX() - 0.01, boulderPosition.getY() - 0.01, boulderPosition.getZ() - 0.01, boulderPosition.getX() + 3.01, boulderPosition.getY() + 3.01, boulderPosition.getZ() + 3.01);
}
public static void drawArrow(AxisAlignedBB aabb, String boulderRoomDirection, char direction, int colourInt, float partialTicks) {
double averageX = (aabb.minX + aabb.maxX) / 2;
double thirtyPercent = (aabb.maxX - aabb.minX) * 0.3;
double averageZ = (aabb.minZ + aabb.maxZ) / 2;
if (((boulderRoomDirection.equals("north") || boulderRoomDirection.equals("south")) && (direction == 'u' || direction == 'd')) ||
((boulderRoomDirection.equals("east") || boulderRoomDirection.equals("west")) && (direction == 'l' || direction == 'r'))) {
Utils.draw3DLine(new Vec3(averageX, aabb.minY, aabb.minZ), new Vec3(averageX, aabb.minY, aabb.maxZ), colourInt, 10, false, partialTicks);
} else {
Utils.draw3DLine(new Vec3(aabb.minX, aabb.minY, averageZ), new Vec3(aabb.maxX, aabb.minY, averageZ), colourInt, 10, false, partialTicks);
}
if ((boulderRoomDirection.equals("north") && direction == 'u') || (boulderRoomDirection.equals("south") && direction == 'd') ||
(boulderRoomDirection.equals("east") && direction == 'l') || (boulderRoomDirection.equals("west") && direction == 'r')) {
Utils.draw3DLine(new Vec3(averageX, aabb.minY, aabb.minZ), new Vec3(aabb.minX + thirtyPercent, aabb.minY, aabb.minZ + thirtyPercent), colourInt, 10, false, partialTicks);
Utils.draw3DLine(new Vec3(averageX, aabb.minY, aabb.minZ), new Vec3(aabb.maxX - thirtyPercent, aabb.minY, aabb.minZ + thirtyPercent), colourInt, 10, false, partialTicks);
} else if ((boulderRoomDirection.equals("north") && direction == 'd') || (boulderRoomDirection.equals("south") && direction == 'u') ||
(boulderRoomDirection.equals("east") && direction == 'r') || (boulderRoomDirection.equals("west") && direction == 'l')) {
Utils.draw3DLine(new Vec3(averageX, aabb.minY, aabb.maxZ), new Vec3(aabb.minX + thirtyPercent, aabb.minY, aabb.maxZ - thirtyPercent), colourInt, 10, false, partialTicks);
Utils.draw3DLine(new Vec3(averageX, aabb.minY, aabb.maxZ), new Vec3(aabb.maxX - thirtyPercent, aabb.minY, aabb.maxZ - thirtyPercent), colourInt, 10, false, partialTicks);
} else if ((boulderRoomDirection.equals("north") && direction == 'l') || (boulderRoomDirection.equals("south") && direction == 'r') ||
(boulderRoomDirection.equals("east") && direction == 'd') || (boulderRoomDirection.equals("west") && direction == 'u')) {
Utils.draw3DLine(new Vec3(aabb.minX, aabb.minY, averageZ), new Vec3(aabb.minX + thirtyPercent, aabb.minY, aabb.minZ + thirtyPercent), colourInt, 10, false, partialTicks);
Utils.draw3DLine(new Vec3(aabb.minX, aabb.minY, averageZ), new Vec3(aabb.minX + thirtyPercent, aabb.minY, aabb.maxZ - thirtyPercent), colourInt, 10, false, partialTicks);
} else {
Utils.draw3DLine(new Vec3(aabb.maxX, aabb.minY, averageZ), new Vec3(aabb.maxX - thirtyPercent, aabb.minY, aabb.minZ + thirtyPercent), colourInt, 10, false, partialTicks);
Utils.draw3DLine(new Vec3(aabb.maxX, aabb.minY, averageZ), new Vec3(aabb.maxX - thirtyPercent, aabb.minY, aabb.maxZ - thirtyPercent), colourInt, 10, false, partialTicks);
}
}
}
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