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index.html
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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>HTML</title>
<link rel="stylesheet" type="text/css" href="styles.css">
<script src="js/jquery-3.3.1.min.js"></script>
</head>
<script>
var sizeField = 20;
var sizeStartSnake = 7;
class Game {
makeGame(elemGame) {
this.interval = 500;
this.elemGame = elemGame;
this.start = false;
this.elemCaption = $('<div/>', {'id': 'divCaption'});
var elemButtonStart = $('<div/>', {'id': 'buttonStart', 'text': 'Start', 'click': this.startGame.bind(this)});
var elemButtonStop = $('<div/>', {'id': 'buttonStop', 'text': 'Stop', 'click': this.stopGame.bind(this)});
this.elemResult = $('<div/>', {'id': 'divResult', 'text': '0'});
this.elemCaption.append(elemButtonStart);
this.elemCaption.append(this.elemResult);
this.elemCaption.append(elemButtonStop);
this.elemGame.append(this.elemCaption);
this.elemSpeed = $('<div/>', {'id': 'divSpeed'});
var elemButtonSlow = $('<div/>', {'id': 'buttonSlow', 'class': 'buttonSpeed ', 'text': 'Slow', 'click': this.setSpeed.bind(this, 1000)});
var elemButtonMiddle = $('<div/>', {'id': 'buttonMiddle', 'class': 'buttonSpeed selected', 'text': 'Middle', 'click': this.setSpeed.bind(this, 500)});
var elemButtonFast = $('<div/>', {'id': 'buttonFast', 'class': 'buttonSpeed', 'text': 'Fast', 'click': this.setSpeed.bind(this, 100)});
this.elemSpeed.append(elemButtonSlow);
this.elemSpeed.append(elemButtonMiddle);
this.elemSpeed.append(elemButtonFast);
this.elemGame.append(this.elemSpeed);
this.divForField = $('<div/>', {'id': 'divField'});
this.elemGame.append(this.divForField);
var fieldcells = field.makeField(sizeField);
this.divForField.append(fieldcells);
var divKeyboard = $('<div/>', {'id': 'keyboard'});
var divLRButtons = $('<div/>', {'id': 'LRButtons'});
var elemButtonTop = $('<div/>', {'id': 'buttonTop', 'class': 'buttonControl', 'text': '↑', 'click': this.setDirection.bind(this)});
var elemButtonLeft = $('<div/>', {'id': 'buttonLeft', 'class': 'buttonControl', 'text': '←', 'click': this.setDirection.bind(this)});
var elemButtonRight = $('<div/>', {'id': 'buttonRight', 'class': 'buttonControl', 'text': '→', 'click': this.setDirection.bind(this)});
var elemButtonBottom = $('<div/>', {'id': 'buttonBottom', 'class': 'buttonControl', 'text': '↓', 'click': this.setDirection.bind(this)});
divKeyboard.append(elemButtonTop);
divLRButtons.append(elemButtonLeft);
divLRButtons.append(elemButtonRight);
divKeyboard.append(divLRButtons);
divKeyboard.append(elemButtonBottom);
this.elemGame.append(divKeyboard);
document.addEventListener('keydown', this._setDirection.bind(this));
}
setSpeed(speed) {
console.log('speed ' + speed);
if(!this.start) {
this.interval = speed;
$('.buttonSpeed').removeClass('selected');
$(event.target).addClass('selected');
}
}
setDirection() {
var direction = event.target.getAttribute('id').substr(6).toLowerCase();
console.log(direction);
this.direction = direction;
}
startGame() {
if(this.start) {this.stopGame()};
this.elemResult.html('0');
this.start = true;
this.direction = 'right';
this.divForField.removeClass('crush');
this.divForField.html('');
var fieldcells = field.makeField(sizeField);
this.divForField.append(fieldcells);
var snakeStartBody = snake.makeSnake(sizeStartSnake);
field.setNewSnake(snakeStartBody);
field.makeNewFood();
this.timerGame = setInterval(snake.stepSnake.bind(snake), this.interval);
}
stopGame() {
console.log('stop');
clearInterval(this.timerGame);
this.divForField.addClass('crush');
this.start = false;
}
showResult(result) {
this.elemResult.html(result);
}
_setDirection() {
var key = event.keyCode;
switch(key) {
case 39:
this.direction = 'right';
break;
case 37:
this.direction = 'left';
break;
case 38:
this.direction = 'top';
break;
case 40:
this.direction = 'bottom';
break;
default:
this.direction = 'right';
break;
}
}
}
class Field {
makeField(sizeField) {
this.sizeField = sizeField;
this.fieldMatrix = [];
this.arrCellElem = [];
this.elemFieldCells = $('<div/>', {'id': 'fieldCells'});
for(var i = 0; i < this.sizeField; i++) {
this.fieldMatrix[i] = [];
for(var j = 0; j < this.sizeField; j++) {
var cell = $('<div/>', {'class': 'cell'});
this.fieldMatrix[i][j] = cell;
this.arrCellElem.push(cell);
this.elemFieldCells.append(cell);
}
}
return this.elemFieldCells;
}
_markBodySnake(cell) {
console.log(cell.x + '-' + cell.y);
this.fieldMatrix[cell.y][cell.x].addClass('snake');
this.fieldMatrix[cell.y][cell.x].mark = true;
}
_unmarkBodySnake(cell) {
console.log(cell.x + '-' + cell.y);
this.fieldMatrix[cell.y][cell.x].removeClass('snake');
this.fieldMatrix[cell.y][cell.x].mark = false;
}
setNewSnake(arrElemSnake) {
arrElemSnake.forEach(function(elem) {
this._markBodySnake(elem);
}, field);
}
setTailHeadSnake(delCell, newCell) {
this._markBodySnake(newCell);
this._unmarkBodySnake(delCell);
}
displayCrush() {
console.log('crush');
game.stopGame();
}
makeNewFood() {
var arrEmpty = [];
arrEmpty = this.arrCellElem.filter(function(cell) {return !(!!cell.mark)});
this.randCell = arrEmpty[Math.floor(Math.random() * arrEmpty.length)];
this.randCell.addClass('food');
this.randCell.markFood = true;
}
eatFood(cell) {
this.fieldMatrix[cell.y][cell.x].markFood = false;
this.randCell.removeClass('food');
}
testCellOnFood(cell) {
return this.fieldMatrix[cell.y][cell.x].markFood;
}
}
class Snake {
makeSnake(sizeStartSnake) {
this.sizeSnake = sizeStartSnake;
this.arrElemBody = [];
this.eat = false;
this.countEat = 0;
var xcoord = Math.floor(field.sizeField / 2) - this.sizeSnake;
var ycoord = Math.floor(field.sizeField / 2);
for(var i = 0; i < this.sizeSnake; i++) {
this.arrElemBody.push({x: xcoord + i, y: ycoord});
}
return this.arrElemBody;
}
stepSnake() {
var direction = game.direction;
console.log(this.eat);
var head = this.arrElemBody[this.arrElemBody.length - 1];
if(this.eat) {
var oldTail = this.arrElemBody[0];
this.eat = false;
this.sizeSnake = this.arrElemBody.length;
} else {
var oldTail = this.arrElemBody.shift();
}
var x = head.x;
var y = head.y;
switch(direction) {
case 'right':
head = {x: x + 1, y: y};
break;
case 'left':
head = {x: x - 1, y: y};
break;
case 'top':
head = {x: x, y: y - 1};
break;
case 'bottom':
head = {x: x, y: y + 1};
break;
}
if(!this._testCrush(head)) {
if(field.testCellOnFood(head)) {
this.eat = true;
field.eatFood(head);
game.showResult(++this.countEat);
}
field.setTailHeadSnake(oldTail, head);
this.arrElemBody.push(head);
if(this.eat) {
field.makeNewFood();
}
} else {
field.displayCrush();
}
}
_testCrush(head) {
//console.log(head);
//console.log(this.arrElemBody);
//console.log(!!this.arrElemBody.find(elem => elem.x == head.x && elem.y == head.y));
return head.x < 0 || head.x >= field.sizeField || head.y < 0 || head.y >= field.sizeField || !!this.arrElemBody.find(elem => elem.x == head.x && elem.y == head.y);
}
}
game = new Game();
field = new Field();
snake = new Snake(sizeStartSnake);
$(document).ready(function () {
game.makeGame($('#gameField'));
});
</script>
<body>
<div id="gameField">
</div>
</body>
</html>