X-Git-Url: https://git.auder.net/img/rock_paper_scissors_lizard_spock.gif?a=blobdiff_plain;f=public%2Fjavascripts%2Fvariants%2FUltima.js;h=18afe40268efffe4c38a9c018d4664cc0bbb4ab8;hb=7688bf7781d10bdf7db2ff558a35852bebcaae53;hp=812d440ba3a5b5d811ea7024b4ff21c19c0064a5;hpb=32cfcea44bf00b0c6c4d172cca715823076ff490;p=vchess.git

diff --git a/public/javascripts/variants/Ultima.js b/public/javascripts/variants/Ultima.js
index 812d440b..18afe402 100644
--- a/public/javascripts/variants/Ultima.js
+++ b/public/javascripts/variants/Ultima.js
@@ -1,8 +1,355 @@
 class UltimaRules extends ChessRules
 {
-	// TODO: think about move UI for "removing an immobilized  piece from the board"
-	// (extend game.js and feedback Rules.js with "there was a click, is it a move?")
+	static getPpath(b)
+	{
+		if (b[1] == "m") //'m' for Immobilizer (I is too similar to 1)
+			return "Ultima/" + b;
+		return b; //usual piece
+	}
 
-	// TODO: Keep usual pieces names here (but comment with Ultima pieces names)
-	// Just change moving + capturing modes.
+	initVariables(fen)
+	{
+		this.kingPos = {'w':[-1,-1], 'b':[-1,-1]};
+		const fenParts = fen.split(" ");
+		const position = fenParts[0].split("/");
+		for (let i=0; i<position.length; i++)
+		{
+			let k = 0;
+			for (let j=0; j<position[i].length; j++)
+			{
+				switch (position[i].charAt(j))
+				{
+					case 'k':
+						this.kingPos['b'] = [i,k];
+						break;
+					case 'K':
+						this.kingPos['w'] = [i,k];
+						break;
+					default:
+						let num = parseInt(position[i].charAt(j));
+						if (!isNaN(num))
+							k += (num-1);
+				}
+				k++;
+			}
+		}
+		this.epSquares = []; //no en-passant here
+	}
+
+	setFlags(fen)
+	{
+		// TODO: for compatibility?
+		this.castleFlags = {"w":[false,false], "b":[false,false]};
+	}
+
+	static get IMMOBILIZER() { return 'm'; }
+	// Although other pieces keep their names here for coding simplicity,
+	// keep in mind that:
+	//  - a "rook" is a coordinator, capturing by coordinating with the king
+	//  - a "knight" is a long-leaper, capturing as in draughts
+	//  - a "bishop" is a chameleon, capturing as its prey
+	//  - a "queen" is a withdrawer, capturing by moving away from pieces
+
+	getPotentialMovesFrom([x,y])
+	{
+		// Pre-check: is thing on this square immobilized?
+		// In this case add potential suicide as a move "taking the immobilizer"
+		const piece = this.getPiece(x,y);
+		const color = this.getColor(x,y);
+		const oppCol = this.getOppCol(color);
+		const V = VariantRules;
+		const adjacentSteps = V.steps[V.ROOK].concat(V.steps[V.BISHOP]);
+		const [sizeX,sizeY] = V.size;
+		for (let step of adjacentSteps)
+		{
+			const [i,j] = [x+step[0],y+step[1]];
+			if (i>=0 && i<sizeX && j>=0 && j<sizeY && this.board[i][j] != V.EMPTY
+				&& this.getColor(i,j) == oppCol)
+			{
+				const oppPiece = this.getPiece(i,j);
+				if (oppPiece == V.IMMOBILIZER
+					|| (oppPiece == V.BISHOP && piece == V.IMMOBILIZER))
+				{
+					return [ new Move({
+						appear: [],
+						vanish: [{x:x,y:y,p:piece,c:color}],
+						start: {x:x,y:y},
+						end: {x:i,y:j}
+					}) ];
+				}
+			}
+		}
+		switch (this.getPiece(x,y))
+		{
+			case VariantRules.IMMOBILIZER:
+				return this.getPotentialImmobilizerMoves([x,y]);
+			default:
+				return super.getPotentialMovesFrom([x,y]);
+		}
+	}
+
+	getSlideNJumpMoves([x,y], steps, oneStep)
+	{
+		const color = this.getColor(x,y);
+		const piece = this.getPiece(x,y);
+		let moves = [];
+		const [sizeX,sizeY] = VariantRules.size;
+		outerLoop:
+		for (let step of steps)
+		{
+			let i = x + step[0];
+			let j = y + step[1];
+			while (i>=0 && i<sizeX && j>=0 && j<sizeY
+				&& this.board[i][j] == VariantRules.EMPTY)
+			{
+				moves.push(this.getBasicMove([x,y], [i,j]));
+				if (oneStep !== undefined)
+					continue outerLoop;
+				i += step[0];
+				j += step[1];
+			}
+			// Only king can take on occupied square:
+			if (piece==VariantRules.KING && i>=0 && i<sizeX && j>=0
+				&& j<sizeY && this.canTake([x,y], [i,j]))
+			{
+				moves.push(this.getBasicMove([x,y], [i,j]));
+			}
+		}
+		return moves;
+	}
+
+	// "Pincher"
+	getPotentialPawnMoves([x,y])
+	{
+		let moves = super.getPotentialRookMoves([x,y]);
+		// Add captures
+		moves.forEach(m => {
+			if (m
+		});
+	}
+
+	// Coordinator
+	getPotentialRookMoves(sq)
+	{
+		const color = this.getColor(sq);
+		const oppCol = this.getOppCol(color);
+		const kp = this.kingPos[color];
+		let moves = super.getPotentialQueenMoves(sq);
+		moves.forEach(m => {
+			// Check piece-king rectangle (if any) corners for enemy pieces
+			if (m.end.x == kp[0] || m.end.y == kp[1])
+				return; //"flat rectangle"
+			const corner1 = [Math.max(m.end.x,kp[0]), Math.min(m.end.y,kp[1])];
+			const corner2 = [Math.min(m.end.x,kp[0]), Math.max(m.end.y,kp[1])];
+			for (let [i,j] of [corner1,corner2])
+			{
+				if (this.board[i][j] != VariantRules.EMPTY && this.getColor(i,j) == oppCol)
+				{
+					m.vanish.push( new PiPo({
+						x:i,
+						y:j,
+						p:this.getPiece(i,j),
+						c:oppCol
+					}) );
+				}
+			}
+		});
+		return moves;
+	}
+
+	// Long-leaper
+	getPotentialKnightMoves([x,y])
+	{
+		let moves = super.getPotentialQueenMoves(sq);
+		// Look in every direction for captures
+		const V = VariantRules;
+		const steps = V.steps[V.ROOK].concat(V.steps[V.BISHOP]);
+		const [sizeX,sizeY] = V.size;
+		const color = this.getColor(x,y);
+		for (let step of steps)
+		{
+			let [i,j] = [x+step[0], y+step[1]];
+			while (i>=0 && i<sizeX && j>=0 && j<sizeY && this.board[i][j]==V.EMPTY)
+			{
+				i += step[0];
+				j += step[1];
+			}
+			if (i<0 && i>=sizeX || j<0 || j>=sizeY || this.getColor(i,j)==color)
+				continue;
+			// Found an enemy piece: potential capture (if empty space behind)
+			// So, while we find enemy pieces + space in this direction, add captures!
+			i += step[0];
+			j += step[1];
+			while ( ) //TODO: finish........
+		}
+		return moves;
+	}
+
+	getPotentialBishopMoves(sq)
+	{
+		return super.getPotentialQueenMoves(sq);
+		// TODO: add captures of coordinators,pinchers,withdrawers... by re-using code
+	}
+
+	getPotentialQueenMoves([x,y])
+	{
+		let moves = super.getPotentialQueenMoves(sq);
+		const V = VariantRules;
+		const adjacentSteps = V.steps[V.ROOK].concat(V.steps[V.BISHOP]);
+		let capturingDirections = [];
+		const color = this.getColor(x,y);
+		const oppCol = this.getOppCol(color);
+		adjacentSteps.forEach(step => {
+			const [i,j] = [x+step[0],y+step[1]];
+			if (this.board[i][j] != V.EMPTY && this.getColor(i,j) == oppCol)
+				capturingDirections.push(step);
+		});
+		moves.forEach(m => {
+			const step = [
+				m.end.x!=x ? (m.end.x-x)/Math.abs(m.end.x-x) : 0,
+				m.end.y!=y ? (m.end.y-y)/Math.abs(m.end.y-y) : 0
+			];
+			// NOTE: includes() function does not work on complex array elements
+			// TODO: this test should be done only once per direction
+			if (capturingDirection.some(dir => _.isEqual(dir, step)))
+			{
+				const [i,j] = [x-step[0],y-step[1]];
+				m.vanish.push(new PiPo({
+					x:i,
+					y:j,
+					p:this.getPiece(i,j),
+					c:oppCol
+				}));
+			}
+		});
+	}
+
+	getPotentialImmobilizerMoves(sq)
+	{
+		return super.getPotentialQueenMoves(sq);
+	}
+
+	getPotentialKingMoves(sq)
+	{
+		const V = VariantRules;
+		return this.getSlideNJumpMoves(sq,
+			V.steps[V.ROOK].concat(V.steps[V.BISHOP]), "oneStep");
+	}
+
+	// isAttacked() is OK because the immobilizer doesn't take
+
+	isAttackedByPawn([x,y], colors)
+	{
+		// Square (x,y) must be surrounded by two enemy pieces,
+		// and one of them at least should be a pawn
+		return false;
+	}
+
+	isAttackedByRook(sq, colors)
+	{
+		// Enemy king must be on same file and a rook on same row (or reverse)
+	}
+
+	isAttackedByKnight(sq, colors)
+	{
+		// Square (x,y) must be on same line as a knight,
+		// and there must be empty square(s) behind.
+	}
+
+	isAttackedByBishop(sq, colors)
+	{
+		// switch on piece nature on square sq: a chameleon attack as this piece
+		// ==> call the appropriate isAttackedBy... (exception of immobilizers)
+		// Other exception: a chameleon cannot attack a chameleon (seemingly...)
+	}
+
+	isAttackedByQueen(sq, colors)
+	{
+		// Square (x,y) must be adjacent to a queen, and the queen must have
+		// some free space in the opposite direction from (x,y)
+	}
+
+	updateVariables(move)
+	{
+		// Just update king position
+		const piece = this.getPiece(move.start.x,move.start.y);
+		const c = this.getColor(move.start.x,move.start.y);
+		if (piece == VariantRules.KING && move.appear.length > 0)
+		{
+			this.kingPos[c][0] = move.appear[0].x;
+			this.kingPos[c][1] = move.appear[0].y;
+		}
+	}
+
+	static get VALUES() { //TODO: totally experimental!
+		return {
+			'p': 1,
+			'r': 2,
+			'n': 5,
+			'b': 3,
+			'q': 3,
+			'm': 5,
+			'k': 1000
+		};
+	}
+
+	static get SEARCH_DEPTH() { return 2; } //TODO?
+
+	static GenRandInitFen()
+	{
+		let pieces = { "w": new Array(8), "b": new Array(8) };
+		// Shuffle pieces on first and last rank
+		for (let c of ["w","b"])
+		{
+			let positions = _.range(8);
+			// Get random squares for every piece, totally freely
+
+			let randIndex = _.random(7);
+			const bishop1Pos = positions[randIndex];
+			positions.splice(randIndex, 1);
+
+			randIndex = _.random(6);
+			const bishop2Pos = positions[randIndex];
+			positions.splice(randIndex, 1);
+
+			randIndex = _.random(5);
+			const knight1Pos = positions[randIndex];
+			positions.splice(randIndex, 1);
+
+			randIndex = _.random(4);
+			const knight2Pos = positions[randIndex];
+			positions.splice(randIndex, 1);
+
+			randIndex = _.random(3);
+			const queenPos = positions[randIndex];
+			positions.splice(randIndex, 1);
+
+			randIndex = _.random(2);
+			const kingPos = positions[randIndex];
+			positions.splice(randIndex, 1);
+
+			randIndex = _.random(1);
+			const rookPos = positions[randIndex];
+			positions.splice(randIndex, 1);
+			const immobilizerPos = positions[0];
+
+			pieces[c][bishop1Pos] = 'b';
+			pieces[c][bishop2Pos] = 'b';
+			pieces[c][knight1Pos] = 'n';
+			pieces[c][knight2Pos] = 'n';
+			pieces[c][queenPos] = 'q';
+			pieces[c][kingPos] = 'k';
+			pieces[c][rookPos] = 'r';
+			pieces[c][immobilizerPos] = 'm';
+		}
+		return pieces["b"].join("") +
+			"/pppppppp/8/8/8/8/PPPPPPPP/" +
+			pieces["w"].join("").toUpperCase() +
+			" 0000"; //TODO: flags?!
+	}
+
+	getFlagsFen()
+	{
+		return "0000"; //TODO: or "-" ?
+	}
 }