BotsAI/src/SnakeBot.java

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/*
* SnakeBot.
* Eine weitere wichtige Funktion des Rovers ist es, Gesteinsproben zu sammeln.
* Interessante Steine sind im Scan mit einem @ gekennzeichnet.
* Mit jeder aufgesammelten Gesteinsprobe wird an den Rover ein Wagen angehängt, der zukünftig hinter dem Rover mitgezogen wird.
* Die Wagen sind im Scan mit * zu identifizieren.
* Vorsicht: fährt der Rover in einen Wagen, ist er schwer beschädigt und kann keine weiteren Steine mehr sammeln.
* Sie können Ihre Implementierung wieder testen mit:
* docker run --rm -p 63187:63187 mediaeng/bots snakes
* Für diese Funktion wird am 7.2.24 in einer gemeinsamen Arena mit allen Teams des Jahrgangs ein Wettbewerb durchgeführt.
* Die besten acht Teams qualifizieren sich für die Königsdisziplin Rumble.
*/
public class SnakeBot extends Bot{
String moves = "";
private int spiralNumber = 0;
private boolean goesForward = true;
private boolean ignoreStones = false;
public static void main(String[] args) {
Bot snakeBot = new SnakeBot(args);
snakeBot.run();
}
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protected SnakeBot(String[] args) {
super(args);
}
//@TODO: find a better way to avoid collected stones
//@TODO: find a better way to collect stones
protected char nextMove(View view) {
boolean stoneDetected = view.data.contains("@");
char nextMove;
nextMove = (stoneDetected && !ignoreStones) ? goToStone(view) : walkBySpiral(view);
int centerCoordinateOfView = view.width / 2;
int frontCellIndex = calculateCharIndexFromCoordinates(view.width, centerCoordinateOfView, centerCoordinateOfView - 1);
if(nextMove == '^' && view.data.charAt(frontCellIndex) == '*'){
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nextMove = (countCollectedStonesLeft(view) <= countCollectedStonesRight(view)) ? '<' : '>';
ignoreStones = true;
}
if(countUncollectedStones(view) > 1) ignoreStones = true;
if(countCollectedStones(view) <= 2 && countUncollectedStones(view) <= 1) ignoreStones = false;
if(isStoneNearby(view)){
nextMove = goToNearbyStone(view);
}
return nextMove;
}
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private boolean isStoneNearby(View view){
int centerCoordinateOfView = view.width / 2;
int frontCellIndex = calculateCharIndexFromCoordinates(view.width, centerCoordinateOfView, centerCoordinateOfView - 1);
int leftCellIndex = calculateCharIndexFromCoordinates(view.width, centerCoordinateOfView - 1, centerCoordinateOfView);
int rightCellIndex = calculateCharIndexFromCoordinates(view.width, centerCoordinateOfView + 1, centerCoordinateOfView);
boolean stoneIsInFront = view.data.charAt(frontCellIndex) == '@';
boolean stoneIsOnTheLeft = view.data.charAt(leftCellIndex) == '@';
boolean stoneIsOneTheRight = view.data.charAt(rightCellIndex) == '@';
return stoneIsInFront || stoneIsOnTheLeft || stoneIsOneTheRight;
}
private char goToNearbyStone(View view){
int centerCoordinateOfView = view.width / 2;
int frontCellIndex = calculateCharIndexFromCoordinates(view.width, centerCoordinateOfView, centerCoordinateOfView - 1);
int leftCellIndex = calculateCharIndexFromCoordinates(view.width, centerCoordinateOfView - 1, centerCoordinateOfView);
int rightCellIndex = calculateCharIndexFromCoordinates(view.width, centerCoordinateOfView + 1, centerCoordinateOfView);
if(view.data.charAt(frontCellIndex) == '@') return '^';
if(view.data.charAt(leftCellIndex) == '@') return '<';
if(view.data.charAt(rightCellIndex) == '@') return '>';
return 0;
}
private void resetMoves() {
moves = "";
spiralNumber = 0;
}
private int countUncollectedStones(View view) {
int count = 0;
for (char c : view.data.toCharArray()) {
if (c == '@') count++;
}
return count;
}
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private int countCollectedStonesLeft(View view) {
int[] leftSide = generateLeftSideArray(view.width);
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int stones = 0;
for (int cellIndex : leftSide) {
if(view.data.charAt(cellIndex) == '*') stones++;
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}
return stones;
}
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private int countCollectedStonesRight(View view) {
int[] rightSide = generateRightSideArray(view.width);
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int stones = 0;
for (int cellIndex : rightSide) {
if(view.data.charAt(cellIndex) == '*') stones++;
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}
return stones;
}
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private int countCollectedStones(View view) {
int count = 0;
for (char c : view.data.toCharArray()) {
if (c == '*') count++;
}
return count;
}
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private char goToStone(View view) {
int rowDifference = findStoneRow(view) - (view.width / 2);
return rowDifference < 0 ? '^' : '<';
}
private int findStoneRow(View view) {
return view.data.indexOf('@') / view.width;
}
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private char walkBySpiral(View view) {
if (moves.isEmpty()) {
spiralNumber++;
moves += "^".repeat(view.width * spiralNumber) + ">" + "^".repeat(view.width * spiralNumber) + ">";
}
char nextMove = moves.charAt(0);
moves = moves.substring(1);
return nextMove;
}
private int calculateCharIndexFromCoordinates(int width, int x, int y){
return width * y + x;
}
private int[] generateLeftSideArray(int sideLength) {
int[] leftStones = new int[sideLength / 2 * sideLength];
int index = 0;
for (int row = 0; row < sideLength; row++) {
for (int col = 0; col < sideLength / 2; col++) {
leftStones[index++] = row * sideLength + col;
}
}
return leftStones;
}
private int[] generateRightSideArray(int sideLength) {
int[] rightStones = new int[sideLength / 2 * sideLength];
int index = 0;
for (int row = 0; row < sideLength; row++) {
for (int col = (sideLength / 2) + 1; col < sideLength; col++) {
rightStones[index++] = row * sideLength + col;
}
}
return rightStones;
}
private char walkByColumns(View view) {
if(moves.isEmpty()){
moves = "^".repeat(28);
moves += (goesForward ? ">" + "^".repeat(view.width) + ">" : "<" + "^".repeat(view.width) + "<");
goesForward = !goesForward;
}
char nextMove = moves.charAt(0);
moves = moves.substring(1);
return nextMove;
}
}