X-Git-Url: https://git.auder.net/?a=blobdiff_plain;f=client%2Fclient_OLD%2Fjavascripts%2Fvariants%2FMagnetic.js;fp=client%2Fclient_OLD%2Fjavascripts%2Fvariants%2FMagnetic.js;h=32279905ad00d01159eead1f1d52d7a251d89357;hb=625022fdcf750f0aff8fcd699f7e9b89730e1d10;hp=0000000000000000000000000000000000000000;hpb=b955c65b942d09d24b5c3bed0d755d4f2f8f71f1;p=vchess.git

diff --git a/client/client_OLD/javascripts/variants/Magnetic.js b/client/client_OLD/javascripts/variants/Magnetic.js
new file mode 100644
index 00000000..32279905
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+++ b/client/client_OLD/javascripts/variants/Magnetic.js
@@ -0,0 +1,204 @@
+class MagneticRules extends ChessRules
+{
+	static get HasEnpassant() { return false; }
+
+	getPotentialMovesFrom([x,y])
+	{
+		let standardMoves = super.getPotentialMovesFrom([x,y]);
+		let moves = [];
+		standardMoves.forEach(m => {
+			let newMove_s = this.applyMagneticLaws(m);
+			if (newMove_s.length == 1)
+				moves.push(newMove_s[0]);
+			else //promotion
+				moves = moves.concat(newMove_s);
+		});
+		return moves;
+	}
+
+	// Complete a move with magnetic actions
+	// TODO: job is done multiple times for (normal) promotions.
+	applyMagneticLaws(move)
+	{
+		if (move.appear[0].p == V.KING && move.appear.length==1)
+			return [move]; //kings are not charged
+		const aIdx = (move.appear[0].p != V.KING ? 0 : 1); //if castling, rook is charged
+		const [x,y] = [move.appear[aIdx].x, move.appear[aIdx].y];
+		const color = this.turn;
+		const lastRank = (color=="w" ? 0 : 7);
+		const standardMove = JSON.parse(JSON.stringify(move));
+		this.play(standardMove);
+		for (let step of [[-1,0],[1,0],[0,-1],[0,1]])
+		{
+			let [i,j] = [x+step[0],y+step[1]];
+			while (V.OnBoard(i,j))
+			{
+				if (this.board[i][j] != V.EMPTY)
+				{
+					// Found something. Same color or not?
+					if (this.getColor(i,j) != color)
+					{
+						// Attraction
+						if ((Math.abs(i-x)>=2 || Math.abs(j-y)>=2) && this.getPiece(i,j) != V.KING)
+						{
+							move.vanish.push(
+								new PiPo({
+									p:this.getPiece(i,j),
+									c:this.getColor(i,j),
+									x:i,
+									y:j
+								})
+							);
+							move.appear.push(
+								new PiPo({
+									p:this.getPiece(i,j),
+									c:this.getColor(i,j),
+									x:x+step[0],
+									y:y+step[1]
+								})
+							);
+						}
+					}
+					else
+					{
+						// Repulsion
+						if (this.getPiece(i,j) != V.KING)
+						{
+							// Push it until we meet an obstacle or edge of the board
+							let [ii,jj] = [i+step[0],j+step[1]];
+							while (V.OnBoard(ii,jj))
+							{
+								if (this.board[ii][jj] != V.EMPTY)
+									break;
+								ii += step[0];
+								jj += step[1];
+							}
+							ii -= step[0];
+							jj -= step[1];
+							if (Math.abs(ii-i)>=1 || Math.abs(jj-j)>=1)
+							{
+								move.vanish.push(
+									new PiPo({
+										p:this.getPiece(i,j),
+										c:this.getColor(i,j),
+										x:i,
+										y:j
+									})
+								);
+								move.appear.push(
+									new PiPo({
+										p:this.getPiece(i,j),
+										c:this.getColor(i,j),
+										x:ii,
+										y:jj
+									})
+								);
+							}
+						}
+					}
+					break;
+				}
+				i += step[0];
+				j += step[1];
+			}
+		}
+		this.undo(standardMove);
+		let moves = [];
+		// Scan move for pawn (max 1) on 8th rank
+		for (let i=1; i<move.appear.length; i++)
+		{
+			if (move.appear[i].p==V.PAWN && move.appear[i].c==color
+				&& move.appear[i].x==lastRank)
+			{
+				move.appear[i].p = V.ROOK;
+				moves.push(move);
+				for (let piece of [V.KNIGHT, V.BISHOP, V.QUEEN])
+				{
+					let cmove = JSON.parse(JSON.stringify(move));
+					cmove.appear[i].p = piece;
+					moves.push(cmove);
+				}
+				// Swap appear[i] and appear[0] for moves presentation (TODO: this is awkward)
+				moves.forEach(m => {
+					let tmp = m.appear[0];
+					m.appear[0] = m.appear[i];
+					m.appear[i] = tmp;
+				});
+				break;
+			}
+		}
+		if (moves.length == 0) //no pawn on 8th rank
+			moves.push(move);
+		return moves;
+	}
+
+	atLeastOneMove()
+	{
+		if (this.kingPos[this.turn][0] < 0)
+			return false;
+		return true; //TODO: is it right?
+	}
+
+	underCheck(color)
+	{
+		return false; //there is no check
+	}
+
+	getCheckSquares(move)
+	{
+		return [];
+	}
+
+	updateVariables(move)
+	{
+		super.updateVariables(move);
+		const c = move.vanish[0].c;
+		if (move.vanish.length >= 2 && move.vanish[1].p == V.KING)
+		{
+			// We took opponent king !
+			const oppCol = V.GetOppCol(c);
+			this.kingPos[oppCol] = [-1,-1];
+			this.castleFlags[oppCol] = [false,false];
+		}
+		// Did we magnetically move our (init) rooks or opponents' ones ?
+		const firstRank = (c == "w" ? 7 : 0);
+		const oppFirstRank = 7 - firstRank;
+		const oppCol = V.GetOppCol(c);
+		move.vanish.forEach(psq => {
+			if (psq.x == firstRank && this.INIT_COL_ROOK[c].includes(psq.y))
+				this.castleFlags[c][psq.y==this.INIT_COL_ROOK[c][0] ? 0 : 1] = false;
+			else if (psq.x == oppFirstRank && this.INIT_COL_ROOK[oppCol].includes(psq.y))
+				this.castleFlags[oppCol][psq.y==this.INIT_COL_ROOK[oppCol][0] ? 0 : 1] = false;
+		});
+	}
+
+	unupdateVariables(move)
+	{
+		super.unupdateVariables(move);
+		const c = move.vanish[0].c;
+		const oppCol = V.GetOppCol(c);
+		if (this.kingPos[oppCol][0] < 0)
+		{
+			// Last move took opponent's king
+			for (let psq of move.vanish)
+			{
+				if (psq.p == 'k')
+				{
+					this.kingPos[oppCol] = [psq.x, psq.y];
+					break;
+				}
+			}
+		}
+	}
+
+	checkGameEnd()
+	{
+		// No valid move: our king disappeared
+		return this.turn == "w" ? "0-1" : "1-0";
+	}
+
+	static get THRESHOLD_MATE()
+	{
+		return 500; //checkmates evals may be slightly below 1000
+	}
+}