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/** * The Ghost Base Class / class Ghost { /* * Initializes the Ghost * @param {Canvas} canvas * @param {?number} dots / init(canvas, dots) { this.canvas = canvas; this.ctx = canvas.context; this.mode = "scatter"; this.tile = Board.getGhostStartTile(this.inPen); this.tileCenter = Board.getTileXYCenter(this.tile); this.turn = Board.getGhostStartTurn(this.inPen); this.center = false; this.dotsCount = dots \|\| 0; this.target = this.scatter; this.speed = Data.getGhostSpeed(this.inPen); this.feet = 0; this.path = null; this.pathName = null; this.pathStep = 0; } /* * Switches the Ghost mode * @param {number} oldMode * @param {number} newMode * @param {Blob} blob / switchMode(oldMode, newMode, blob) { if (!this.dontSwitch(oldMode)) { this.mode = newMode; this.target = this.getTarget(blob); this.speed = this.getSpeed(); if (!this.dontHalfTurn(oldMode)) { if (this.path === null) { this.turn = { x : this.dir.x -1, y : this.dir.y * -1 }; } else { this.turn = { x: 1, y: 0 }; } } } } /** * Moves the Ghost * @param {number} speed * @param {Blob} blob * @param {number} switchMode * @return {boolean} / move(speed, blob, switchMode) { let addToPen = false; this.x += this.dir.x this.speed * speed; this.y += this.dir.y * this.speed * speed; if (this.path !== null) { addToPen = this.pathMove(blob, switchMode); } else { this.normalMove(blob); } this.moveFeet(); this.draw(); return addToPen; } /** * Moves the Ghost in a predefined path * @param {Blob} blob * @param {number} switchMode * @return {boolean} / pathMove(blob, switchMode) { let step = this.path[this.pathStep]; if (this.passedDist()) { if (this.dir.x) { this.x = step.distx; } if (this.dir.y) { this.y = step.disty; } if (step.next !== null) { this.pathStep = step.next; this.dir = this.path[this.pathStep].dir; } else if (this.pathName === "exitPen") { this.path = null; this.dir = this.turn; this.turn = null; this.speed = Data.getGhostSpeed(false); } else if (this.pathName === "enterPen") { this.mode = switchMode; this.target = this.getTarget(blob); this.tile = Board.getGhostStartTile(false); this.tileCenter = Board.getTileXYCenter(this.tile); this.turn = Board.getGhostStartTurn(true); return true; } } return false; } /* * Moves the Ghost around the board * @param {Blob} blob / normalMove(blob) { this.newTile(blob); this.x = Board.tunnelEnds(this.x); if (!this.center && this.passedCenter()) { if (this.turn) { this.makeTurn(); } if (this.isNextIntersection()) { this.decideTurn(); } this.speed = this.getSpeed(); this.center = true; } } /* * The Ghost moved to a new Tile * @param {Blob} blob / newTile(blob) { var tile = Board.getTilePos(this.x, this.y); if (!Board.equalTiles(this.tile, tile)) { this.tile = tile; this.tileCenter = Board.getTileXYCenter(this.tile); this.center = false; if (this.isEnteringPen()) { this.setPath("enterPen"); } } } /* * Sets the Path of the Ghost * @param {string} path / setPath(name) { this.pathName = name; this.pathStep = 0; this.path = this.paths[this.pathName]; this.dir = this.path[this.pathStep].dir; this.speed = Data.getPathSpeed(name); } /* * Returns true if the Ghost is entering the Pen * @return {boolean} / isEnteringPen() { return this.mode === "eyes" && Board.equalTiles(this.tile, Board.eyesTarget); } /* * The Ghost turns used the previously stored turn direction / makeTurn() { this.x = this.tileCenter.x; this.y = this.tileCenter.y; this.dir = this.turn; this.turn = null; } /* * The Ghost decided which direction to do next depending on different factors / decideTurn() { let turns = this.getTurns(); if (turns.length === 1) { this.turn = turns[0]; } else if (Data.isFrighten(this.mode)) { this.turn = turns[Utils.rand(0, turns.length - 1)]; } else { this.turn = this.getTargetTurn(turns); } } /* * Returns a list with all the possible turns a Ghost can do at an intersection * @return {Array.<{x: number, y: number}>} / getTurns() { let tile = this.getNextTile(), pos = Board.tileToString(tile), turns = Board.getTurns(pos), result = []; turns.forEach((turn) => { if ((turn + 2) % 4 !== Board.dirToNumber(this.dir)) { result.push(Board.numberToDir(turn)); } }); return result; } /* * Decides the best turn depending on which cell after the intersection is closes to the target * @param {Array.<{x: number, y: number}>} turns * @return {{x: number, y: number}} / getTargetTurn(turns) { let tile = this.getNextTile(), best = 999999, result = {}; turns.forEach((turn) => { let ntile = Board.sumTiles(tile, turn), distx = Math.pow(this.target.x - ntile.x, 2), disty = Math.pow(this.target.y - ntile.y, 2), dist = Math.sqrt(distx + disty); if (dist < best) { best = dist; result = turn; } }); return result; } /* * Checks if the Ghost and the Blob are in the same tile and when those * are the same depending on the Ghost's mode, it can kill the blob or die * @param {{x: number, y: number}} blobTile * @return {string} / killOrDie(blobTile) { if (Board.equalTiles(this.tile, blobTile) && !this.path) { if (Data.isFrighten(this.mode)) { this.mode = "eyes"; this.target = Board.eyesTarget; this.speed = Data.eyesSpeed; return "kill"; } else if (this.mode !== "eyes") { return "die"; } } } /* * Returns true if the Ghost should change it's target * @param {number} globalMode * @return {boolean} / shouldChangeTarget(globalMode) { return this.mode !== "eyes" && (globalMode === "chase" \|\| this.isElroy()); } /* * Don't let the Ghost change mode on certain cases * @param {number} mode * @return {boolean} / dontSwitch(mode) { return (Data.isFrighten(mode) && !Data.isFrighten(this.mode)) \|\| this.mode === "eyes"; } /* * Don't let the Ghost half turn when switching from Blue to White mode * @param {number} mode * @return {boolean} / dontHalfTurn(mode) { return mode === "blue" \|\| mode === "white"; } /* * Returns the Ghost's Speed based on diferent factors * @return {number} / getSpeed() { let speed = Data.getGhostSpeed(false); if (this.mode === "eyes") { speed = Data.eyesSpeed; } else if (Data.isFrighten(this.mode)) { speed = Data.getLevelData("ghostFrightSpeed"); } else if (Board.isTunnel(this.tile.x, this.tile.y)) { speed = Data.getLevelData("tunnelSpeed"); } else if (this.isElroy()) { speed = Data.getLevelData("elroySpeed" + this.elroyMode); } return speed; } /* * Returns true if the Ghost moved past certain distance stored in the Path * @return {boolean} / passedDist() { let path = this.path[this.pathStep]; return ( (this.dir.x === 1 && this.x >= path.distx) \|\| (this.dir.x === -1 && this.x <= path.distx) \|\| (this.dir.y === 1 && this.y >= path.disty) \|\| (this.dir.y === -1 && this.y <= path.disty) ); } /* * Returns true if the Ghost passed the center of the tile * @return {boolean} / passedCenter() { return ( (this.dir.x === 1 && this.x >= this.tileCenter.x) \|\| (this.dir.x === -1 && this.x <= this.tileCenter.x) \|\| (this.dir.y === 1 && this.y >= this.tileCenter.y) \|\| (this.dir.y === -1 && this.y <= this.tileCenter.y) ); } /* * Returns the next tile * @return {{x: number, y: number}} / getNextTile() { return Board.sumTiles(this.tile, this.dir); } /* * Returns true if the next tile is an intersection * @return {boolean} / isNextIntersection() { let tile = this.getNextTile(); return Board.isIntersection(tile.x, tile.y); } /* * Returns the Ghost's target depending on the current mode * @param {Blob} blob * @return {{x: number, y: number}} / getTarget(blob) { if (this.mode === "chase" \|\| this.isElroy()) { return this.chase(blob); } return this.scatter; } /* * Returns true if the Ghost is in "Cruise Elroy" Mode. Only used for Blinky * @return {boolean} / isElroy() { return false; } /* * Makes it possible for a Ghost to switch to "Cruise Elroy" Mode. Only used for Blinky / activateElroy() { return undefined; } /* * Increases the internal pills count of a Ghost / increaseDots() { this.dotsCount += 1; } /* * Sets the Chase target of the Ghost * @param {Blob} blob / setChaseTarget(blob) { this.target = this.chase(blob); } /* * Changes the Drawing for the Ghosts feet / moveFeet() { this.feet = (this.feet + 0.3) % 2; } /* * Draws the Ghost / draw() { let center = Board.ghostSize / 2; this.canvas.savePos(this.x, this.y); this.ctx.save(); this.ctx.translate(Math.round(this.x) - center, Math.round(this.y) - center); this.ghostBody(); if (Data.isFrighten(this.mode)) { this.ghostFrightenFace(); } else { this.ghostNormalFace(); } this.ctx.restore(); } /* * Draws the Ghost's Body / ghostBody() { this.ctx.fillStyle = this.getBodyColor(); this.ctx.beginPath(); this.ctx.arc(8, 8, 8, Math.PI, 1.5 Math.PI, false); this.ctx.arc(10, 8, 8, 1.5 * Math.PI, 2 * Math.PI, false); if (!Math.floor(this.feet)) { this.ghostFeet0(); } else { this.ghostFeet1(); } this.ctx.fill(); } /** * Draws one of the variations of the Ghost's Feet / ghostFeet0() { this.ctx.lineTo(18, 16); this.ctx.lineTo(16, 18); this.ctx.lineTo(15, 18); this.ctx.lineTo(12, 15); this.ctx.lineTo(9, 18); this.ctx.lineTo(6, 15); this.ctx.lineTo(3, 18); this.ctx.lineTo(2, 18); this.ctx.lineTo(0, 16); this.ctx.lineTo(0, 8); } /* * Draws the other variation of the Ghost's Feet / ghostFeet1() { this.ctx.lineTo(18, 18); this.ctx.lineTo(15, 15); this.ctx.lineTo(12, 18); this.ctx.lineTo(11, 18); this.ctx.lineTo(9, 15); this.ctx.lineTo(7, 18); this.ctx.lineTo(6, 18); this.ctx.lineTo(3, 15); this.ctx.lineTo(0, 18); this.ctx.lineTo(0, 8); } /* * Draws the Ghost's Face for the Chase/Scatter/Eyes modes / ghostNormalFace() { this.ctx.fillStyle = "rgb(255, 255, 255)"; this.ctx.beginPath(); this.ctx.arc(6 + this.dir.x 2, 7 + this.dir.y * 2, 3, 0, 2 * Math.PI); this.ctx.arc(12.5 + this.dir.x * 2, 7 + this.dir.y * 2, 3, 0, 2 * Math.PI); this.ctx.fill(); this.ctx.fillStyle = "rgb(0, 51, 255)"; this.ctx.beginPath(); this.ctx.arc(6 + this.dir.x * 4, 7 + this.dir.y * 4, 1.5, 0, 2 * Math.PI); this.ctx.arc(12.5 + this.dir.x * 4, 7 + this.dir.y * 4, 1.5, 0, 2 * Math.PI); this.ctx.fill(); } /** * Draws the Ghost's Face for the Frighten (Blue/White) modes / ghostFrightenFace() { this.ctx.fillStyle = this.getFaceColor(); this.ctx.beginPath(); this.ctx.arc(6, 7, 1.5, 0, 2 Math.PI); this.ctx.arc(12.5, 7, 1.5, 0, 2 * Math.PI); this.ctx.fill(); this.ctx.strokeStyle = this.getFaceColor(); this.ctx.beginPath(); this.ctx.moveTo(3, 14); this.ctx.lineTo(5, 11); this.ctx.lineTo(7, 14); this.ctx.lineTo(9, 11); this.ctx.lineTo(11, 14); this.ctx.lineTo(13, 11); this.ctx.lineTo(15, 14); this.ctx.stroke(); } /** * Returns the color for the Ghosts body depending on the mode * @return {string} / getBodyColor() { switch (this.mode) { case "blue": return "rgb(0, 51, 255)"; case "white": return "rgb(255, 255, 255)"; case "eyes": return "rgb(0, 0, 0)"; default: return this.color; } } /* * Returns the color used for the Ghosts face depending on the mode * @return {string} / getFaceColor() { return this.mode === "blue" ? "rgb(255, 255, 255)" : "rgb(255, 0, 0)"; } /* * Returns the Ghost's ID * @return {number} / getID() { return this.id; } /* * Returns the Ghost's x position * @return {number} / getX() { return this.x; } /* * Returns the Ghost's y position * @return {number} / getY() { return this.y; } /* * Returns the Ghost's tile position * @return {{x: number, y: number}} / getTile() { return this.tile; } /* * Returns the Ghost's interntal dots counter * @return {number} / getDots() { return this.dotsCount; } /* * Returns the Ghost's current target tile * @return {number} */ getTargetTile() { return this.target; } }

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