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refactored pawn movement + implemented knight movement

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This commit is contained in:
CT
2026-04-23 16:18:28 -05:00
parent 6e6c222d57
commit ce61482b9e
4 changed files with 34 additions and 18 deletions
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6
Board.java
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@@ -26,6 +26,10 @@ public class Board {
} }
public boolean isOpen(Position pos) { public boolean isOpen(Position pos) {
return this.board[pos.x][pos.y] == null; return this.getPiece(pos) == null;
}
public Piece getPiece(Position pos) {
return this.board[pos.x][pos.y];
} }
} }

15
Knight.java
View File

@@ -12,10 +12,17 @@ public class Knight extends Piece {
public ArrayList<Position> getLegalMoves(Board board) { public ArrayList<Position> getLegalMoves(Board board) {
ArrayList<Position> positions = new ArrayList<Position>(); ArrayList<Position> positions = new ArrayList<Position>();
for (int i : xDir) { for (int i = 0; i < xDir.length; i++) {
for (int j : yDir) { int xPlus = xDir[i];
Position test = new Position(pos.x + i, pos.y + j); int yPlus = yDir[i];
if (!Board.inBounds(test)) continue; Position test = new Position(pos.x + xPlus, pos.y + yPlus);
if (!Board.inBounds(test)) continue;
if (board.isOpen(test)) {
positions.add(test);
continue;
}
if (!board.getPiece(test).colorMatches(this)) {
positions.add(test);
} }
} }

27
Pawn.java
View File

@@ -13,27 +13,28 @@ public class Pawn extends Piece {
public ArrayList<Position> getLegalMoves(Board board) { public ArrayList<Position> getLegalMoves(Board board) {
ArrayList<Position> positions = new ArrayList<Position>(); ArrayList<Position> positions = new ArrayList<Position>();
// diagonal moves (captures) // diagonal moves (captures)
if (Board.inBounds(new Position(pos.x + 1, pos.y + colorDir)) Position test = new Position(pos.x + 1, pos.y + colorDir);
&& !board.isOpen(new Position(pos.x + 1, pos.y + colorDir)) if (Board.inBounds(test) && !board.isOpen(test) && !board.getPiece(test).colorMatches(this)) {
&& !board.board[pos.x + 1][pos.y + colorDir].color.equals(this.color)) { positions.add(test);
positions.add(new Position(pos.x + 1, pos.y + colorDir));
} }
if (Board.inBounds(new Position(pos.x - 1, pos.y + colorDir))
&& !board.isOpen(new Position(pos.x - 1, pos.y + colorDir)) test = new Position(pos.x - 1, pos.y + colorDir);
&& !board.board[pos.x - 1][pos.y + colorDir].color.equals(this.color)) { if (Board.inBounds(test) && !board.isOpen(test) && !board.getPiece(test).colorMatches(this)) {
positions.add(new Position(pos.x - 1, pos.y + colorDir)); positions.add(test);
} }
// one square in front: if blocked return early // one square in front: if blocked return early
if (Board.inBounds(new Position(pos.x, pos.y + colorDir)) test = new Position(pos.x, pos.y + colorDir);
&& board.isOpen(new Position(pos.x, pos.y + colorDir))) { if (Board.inBounds(test) && board.isOpen(test)) {
positions.add(new Position(pos.x, pos.y + colorDir)); positions.add(test);
} else return positions; } else return positions;
// two squares in front // two squares in front
if (!hasMoved && board.isOpen(new Position(pos.x, pos.y + 2 * colorDir))) { test = new Position(pos.x, pos.y + 2 * colorDir);
positions.add(new Position(pos.x, pos.y + 2 * colorDir)); if (!hasMoved && board.isOpen(test)) {
positions.add(test);
} }
return positions; return positions;
} }

4
Piece.java
View File

@@ -21,4 +21,8 @@ public class Piece {
System.out.println("parent method not overriden"); System.out.println("parent method not overriden");
return null; return null;
} }
public boolean colorMatches(Piece p) {
return this.color.equals(p.color);
}
} }