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/** * The Blob Class / class Blob { /* * The Blob constructor / constructor() { this.init(Board.gameCanvas); } /* * Initializes the Blob * @param {Canvas} canvas / init(canvas) { this.canvas = canvas; this.ctx = canvas.context; this.tile = Board.startingPos; this.tileCenter = Board.getTileXYCenter(this.tile); this.x = this.tileCenter.x; this.y = this.tileCenter.y; this.dir = Board.startingDir; this.speed = Data.getLevelData("pmSpeed"); this.center = true; this.turn = null; this.delta = null; this.mouth = 5; this.radius = Board.blobRadius; this.sound = 1; } /* * Animates the Blob * @param {number} speed * @return {boolean} / animate(speed) { let newTile = false; if (this.center && this.crashed()) { this.mouth = 5; } else if (this.delta) { newTile = this.cornering(speed); } else { newTile = this.move(speed); } this.draw(); return newTile; } /* * Moves the Blob * @param {number} speed * @return {boolean} / move(speed) { this.x += this.dir.x this.speed * speed; this.y += this.dir.y * this.speed * speed; this.moveMouth(); this.newTile(); let newTile = this.atCenter(); this.x = Board.tunnelEnds(this.x); return newTile; } /** * Changes the state of the Blob's mouth / moveMouth() { this.mouth = (this.mouth + 1) % 20; } /* * The Blob might have entered a new Tile, and several things might need to be done / newTile() { let tile = Board.getTilePos(this.x, this.y); if (!Board.equalTiles(this.tile, tile)) { this.tile = tile; this.tileCenter = Board.getTileXYCenter(tile); this.center = false; if (this.turn && this.inBoard(this.turn) && !this.isWall(this.turn)) { this.delta = { x : this.dir.x \|\| this.turn.x, y : this.dir.y \|\| this.turn.y }; } } } /* * Does the turning or wall crash when the Blob is at, or just passed, the center of a tile * @return {boolean} / atCenter() { if (!this.center && this.passedCenter()) { let turn = false; if (this.turn && this.inBoard(this.turn) && !this.isWall(this.turn)) { this.dir = this.turn; this.turn = null; turn = true; } if (turn \|\| this.crashed()) { this.x = this.tileCenter.x; this.y = this.tileCenter.y; } this.center = true; return true; } return false; } /* * Does a faster turn by turnning a bit before the corner. * Only when a turn is asked before reaching an intersection * @param {number} speed * @return {boolean} / cornering(speed) { this.x += this.delta.x this.speed * speed; this.y += this.delta.y * this.speed * speed; if (this.passedCenter()) { if (this.dir.x) { this.x = this.tileCenter.x; } if (this.dir.y) { this.y = this.tileCenter.y; } this.dir = this.turn; this.turn = null; this.delta = null; return true; } return false; } /** * Eats food (dots, energizers, fruits) * @param {boolean} atPill * @param {boolean} frightenGhosts / onEat(atPill, frightenGhosts) { if (!atPill) { this.sound = 1; } let key; if (frightenGhosts) { key = atPill ? "eatingFrightSpeed" : "pmFrightSpeed"; } else { key = atPill ? "eatingSpeed" : "pmSpeed"; } this.speed = Data.getLevelData(key); } /* * Returns the apropiate sound effect * @return {string} / getSound() { this.sound = (this.sound + 1) % 2; return this.sound ? "eat2" : "eat1"; } /* * New direction (given by the user) * @param {{x: number, y: number}} turn / makeTurn(turn) { if (this.delta) { return; } if (this.turnNow(turn)) { this.dir = turn; this.turn = null; this.center = false; } else { this.turn = turn; } } /* * Draws a Blob with the given data / draw() { let values = [ 0, 0.2, 0.4, 0.2 ], mouth = Math.floor(this.mouth / 5), delta = values[mouth]; this.savePos(); this.ctx.save(); this.ctx.fillStyle = "rgb(255, 255, 51)"; this.ctx.translate(Math.round(this.x), Math.round(this.y)); this.ctx.rotate(this.getAngle()); this.ctx.beginPath(); this.ctx.arc(0, 0, this.radius, (1 + delta) Math.PI, (3 - delta) * Math.PI); this.ctx.lineTo(Math.round(this.radius / 3), 0); this.ctx.fill(); this.ctx.restore(); } /** * Saves the Blob's position to delete clear it before the next animation / savePos() { this.canvas.savePos(this.x, this.y); } /* * Draws the next step in the Blob's death animation * @param {Context} ctx * @param {number} count / drawDeath(ctx, count) { let delta = count / 50; ctx.fillStyle = "rgb(255, 255, 51)"; ctx.beginPath(); ctx.arc(0, 0, this.radius, (1.5 - delta) Math.PI, (1.5 + delta) * Math.PI, true); ctx.lineTo(0, 0); ctx.fill(); } /** * Draws a circle as the next step in the Blob Death animation * @param {Context} ctx * @param {number} count / drawCircle(ctx, count) { let radius = Math.round(count / 2); ctx.strokeStyle = "rgb(159, 159, 31)"; ctx.lineWidth = 3; ctx.beginPath(); ctx.arc(0, 0, radius, 0, 2 Math.PI, true); ctx.stroke(); } /** * Returns true if the Blob crashed with a wall * @return {boolean} / crashed() { return this.inBoard(this.dir) && this.isWall(this.dir); } /* * Returns true if the Blob has passed the center of the currrent 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 true if the Blob has to turn now * @param {{x: number, y: number}} * @return {boolean} / turnNow(turn) { return ( (!this.dir.x && !turn.x) \|\| (!this.dir.y && !turn.y) \|\| // Half Turn (this.center && this.crashed() && this.inBoard(turn) && !this.isWall(turn)) // Crash Turn ); } /* * Returns true if the next tile is a wall * @param {{x: number, y: number}} * @return {boolean} / isWall(turn) { let tile = Board.sumTiles(this.tile, turn); return Board.isWall(tile.x, tile.y); } /* * Returns true if the next tile is a wall * @param {{x: number, y: number}} * @return {boolean} / inBoard(turn) { let tile = Board.sumTiles(this.tile, turn); return Board.inBoard(tile.x, tile.y); } /* * Returns the angle of the Blob using its direction * @return {number} / getAngle() { let angle; if (this.dir.x === -1) { angle = 0; } else if (this.dir.x === 1) { angle = Math.PI; } else if (this.dir.y === -1) { angle = 0.5 Math.PI; } else if (this.dir.y === 1) { angle = 1.5 * Math.PI; } return angle; } /** * Returns the Blob x position * @return {number} / getX() { return this.x; } /* * Returns the Blob y position * @return {number} / getY() { return this.y; } /* * Returns the Blob direction * @return {{x: number, y: number}} / getDir() { return this.dir; } /* * Returns the Blob tile * @return {{x: number, y: number}} */ getTile() { return this.tile; } }

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