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game.js
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game.js
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'use strict';
class Vector {
constructor(x = 0, y = 0) {
this.x = x;
this.y = y;
}
plus(vector) {
if (!(vector instanceof Vector)) {
throw new Error('Можно прибавлять к вектору только вектор типа Vector');
}
return new Vector(this.x + vector.x, this.y + vector.y);
}
times(multiplier) {
return new Vector(this.x * multiplier, this.y * multiplier);
}
}
class Actor {
constructor(pos = new Vector(0, 0), size = new Vector(1, 1), speed = new Vector(0, 0)) {
if (!(pos instanceof Vector)) {
throw new Error('pos не является объектом типа Vector');
}
if (!(size instanceof Vector)) {
throw new Error('size не является объектом типа Vector');
}
if (!(speed instanceof Vector)) {
throw new Error('speed не является объектом типа Vector');
}
this.pos = pos;
this.size = size;
this.speed = speed;
}
act() {
}
get left() {
return this.pos.x;
}
get top() {
return this.pos.y;
}
get right() {
return this.pos.x + this.size.x;
}
get bottom() {
return this.pos.y + this.size.y;
}
get type() {
return 'actor';
}
isIntersect(movingObj) {
if (!(movingObj instanceof Actor)) {
throw new Error('Аргумент должен быть экземпляром класса Actor');
}
if (movingObj === this || (movingObj.left >= this.right) || (movingObj.right <= this.left) || (movingObj.top >= this.bottom) || (movingObj.bottom <= this.top) || (movingObj.size.x < 0 || movingObj.size.y < 0)) {
return false;
}
return true;
}
}
class Level {
constructor(grid = [], actors = []) {
this.grid = grid;
this.actors = actors;
this.player = this.actors.find(actor => actor.type === 'player');
this.height = this.grid.length;
this.width = this.height > 0 ? Math.max(...(this.grid.map((el) => {
return el.length;
}))) : 0;
this.status = null;
this.finishDelay = 1;
}
isFinished() {
if ((this.status !== null) && (this.finishDelay < 0)) {
return true;
}
return false;
}
actorAt(movingObject) {
if (!(movingObject instanceof Actor) || movingObject === '') {
throw Error('не объект Actor');
}
return this.actors.find(actor => actor.isIntersect(movingObject));
}
obstacleAt(pos, size) {
var leftBorder = Math.floor(pos.x);
var rightBorder = Math.ceil(pos.x + size.x);
var topBorder = Math.floor(pos.y);
var bottomBorder = Math.ceil(pos.y + size.y);
if (leftBorder < 0 || rightBorder > this.width || topBorder < 0) {
return 'wall';
}
if (bottomBorder > this.height) {
return 'lava';
}
for (let y = topBorder; y < bottomBorder; y++) {
for (let x = leftBorder; x < rightBorder; x++) {
let fieldGame = this.grid[y][x];
if (fieldGame) {
return fieldGame;
}
}
}
}
removeActor(obj) {
var indexObj = this.actors.indexOf(obj);
if (indexObj !== -1) {
this.actors.splice(indexObj, 1);
}
}
noMoreActors(type) {
return !this.actors.some(actor => actor.type === type)
}
playerTouched(type, movingObj) {
if (this.status !== null) {
return false;
} else if ((type === 'lava') || (type === 'fireball')) {
this.status = 'lost';
this.finishDelay = 1;
} else if (type === "coin") {
this.actors = this.actors.filter(obj => obj !== movingObj);
if (this.noMoreActors('coin')) {
this.status = 'won';
this.finishDelay = 1;
}
}
}
}
class LevelParser {
constructor(dictionary) {
this.dictionary = dictionary;
}
actorFromSymbol(symbol) {
if (symbol === undefined) {
return undefined;
}
if (Object.keys(this.dictionary).indexOf(symbol) !== -1) {
return this.dictionary[symbol];
}
return undefined;
}
obstacleFromSymbol(symbol) {
if (symbol === 'x') {
return 'wall';
} else if (symbol === '!') {
return 'lava';
} else {
return undefined;
}
}
createGrid(arrayString) {
return arrayString.map(row => [...row].map(element => this.obstacleFromSymbol(element)));
}
createActors(arrayString) {
const arrayMovingObj = [];
if (this.dictionary) {
arrayString.forEach((line, y) => {
[...line].forEach((symbol, x) => {
if (typeof this.dictionary[symbol] === 'function') {
const actor = new this.dictionary[symbol](new Vector (x,y));
if (actor instanceof Actor) {
arrayMovingObj.push(actor);
}
}
});
});
}
return arrayMovingObj;
}
parse(arrayString) {
return new Level(this.createGrid(arrayString), this.createActors(arrayString));
}
}
class Fireball
extends Actor {
constructor(pos = new Vector(0, 0), speed = new Vector(0, 0)) {
super(pos, new Vector(1, 1), speed)
}
get type() {
return 'fireball';
}
getNextPosition(time = 1) {
return this.pos.plus(this.speed.times(time));
}
handleObstacle() {
this.speed = this.speed.times(-1);
}
act(time, level) {
var newPosition = this.getNextPosition(time);
if (level.obstacleAt(newPosition, this.size)) {
this.handleObstacle();
} else {
this.pos = newPosition;
}
}
}
class HorizontalFireball extends Fireball {
constructor(pos) {
super(pos, new Vector(2, 0));
}
}
class VerticalFireball extends Fireball {
constructor(pos) {
super(pos, new Vector(0, 2));
}
}
class FireRain extends Fireball {
constructor(pos) {
super(pos);
this.speed.y = 3;
this.startPos = pos;
}
handleObstacle() {
this.pos = this.startPos;
}
}
class Coin extends Actor {
constructor(pos = new Vector(0, 0)) {
super(pos, new Vector(0.6, 0.6));
this.pos = this.pos.plus(new Vector(0.2, 0.1));
this.springSpeed = 8;
this.springDist = 0.07;
this.spring = Math.random() * 2 * Math.PI;
this.startPos = this.pos;
}
get type() {
return 'coin';
}
updateSpring(time = 1) {
this.spring = this.spring + this.springSpeed * time;
}
getSpringVector() {
return new Vector(0, Math.sin(this.spring) * this.springDist);
}
getNextPosition(time = 1) {
this.updateSpring(time);
return this.startPos.plus(this.getSpringVector());
}
act(time) {
this.pos = this.getNextPosition(time);
}
}
class Player extends Actor {
constructor(pos = new Vector(0, 0)) {
super(pos, new Vector(0.8, 1.5), new Vector(0, 0));
this.pos.y -= 0.5;
}
get type() {
return 'player';
}
}
const actorDict = {
'@': Player,
'v': FireRain,
'=': HorizontalFireball,
'|': VerticalFireball,
'o': Coin
};
const parser = new LevelParser(actorDict);
loadLevels()
.then(schemas => runGame(JSON.parse(schemas), parser, DOMDisplay))
.then(() => alert('Вы выиграли приз!'))
.catch(err => alert(err));