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/* GLOBAL STATE VARIABLES START WITH A __ */ |
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var _player = null; |
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/* |
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Title: game-08.js |
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Description: In this version of the code, we are going to give our |
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player a death sequence when he is hit. |
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*/var _player = null; |
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var _viewportX = 0; |
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var _scoreDisplay = ""; |
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var _gameStartTime = (new Date()).getTime(); |
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var _timeLeftDisplay = ""; |
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var _secondsTotal = 120; |
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|
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/* State */ |
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var __STATE = {}; |
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__STATE.level = 1; |
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__STATE.gameStarted = false; |
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__STATE.gameOver = false; |
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__STATE.timeLeft = _secondsTotal; |
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__STATE.currentScore = 0; |
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__STATE.gameOverIsDisplaying = false; |
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__STATE.numCoinsToCollect = -1; |
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|
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const PLAYER_SPEED = 4; |
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const WALKER_VELOCITY = -80; |
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const EVENT_PLAYER_DIE = "EVENT_PLAYER_DIE"; |
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const EVENT_PLAYER_HIT_WALKER = "EVENT_PLAYER_HIT_WALKER"; |
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const EVENT_PLAYER_HIT_WALL = "EVENT_PLAYER_HIT_WALL"; |
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const EVENT_GAME_OVER = "EVENT_GAME_OVER"; |
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|
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const SCREENWIDTH = 800; |
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const SCREENHEIGHT = 600; |
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const TILE_WIDTH = 80; |
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const TILE_HEIGHT = 60; |
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const GRAVITY_STRENGTH = 1000; |
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const RIGHT = 0; |
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const LEFT = 1; |
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const NONE = 2; |
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|
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var _player = null; |
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|
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var tileMap = [ |
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[[0,1],[8,1],[0,13],[4,1],[0,8],[8,1],[0,5],[4,1],[0,7],[8,1],[0,6],[8,1],[0,2]], |
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[[0,8],[4,1],[0,3],[4,1],[0,6],[8,1],[0,28]], |
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[[0,8],[0,24],[4,1],[0,3],[4,1],[0,6],[8,1],[0,4]], |
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[[0,11],[4,1],[0,15],[4,1],[0,13],[4,1],[0,6]], |
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[[0,16],[8,1],[0,19],[8,1],[0,11]], |
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[[0,9],[4,1],[0,38]], |
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[[0,48]], |
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[[1,48]] |
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]; |
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|
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Crafty.init(800, 600, document.getElementById('gamecanvas')); |
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setupGlobalBindings(); |
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|
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var assets = {'tiles': ['img/tile-1.png', 'img/platform.png', 'img/platformx2.png']}; |
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var playerSprite = { 'sprites': { 'img/playerSprite.png': { tile: 50, tileh: 77, map: { man_left: [0, 1], man_right: [0, 2], jump_right: [6, 4] } } } }; |
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initialiseGame(); |
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function initialiseGame () { |
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Crafty.load(assets, function(){ |
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reset(); |
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loadBackground(); |
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loadSprites(); |
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generateMap(); |
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spawnEntities(); |
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displayText(); |
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/* Load sounds */ |
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Crafty.audio.add("coin", "sounds/coin.wav"); |
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__STATE.gameStarted = true; |
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}); |
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} |
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|
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function loadBackground () { |
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Crafty.background('#3BB9FF'); |
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//Crafty.background('#FFFFFF url(img/bg.png) repeat-x center center'); |
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} |
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|
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function loadSprites () { |
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Crafty.load(playerSprite); |
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Crafty.load(walkerSprite); |
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} |
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|
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function spawnEntities () { |
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spawnPlayer(); |
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spawnWalkers(); |
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} |
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|
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function spawnPlayer (){ |
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_player = Crafty.e('Player, 2D, DOM, man_right, SpriteAnimation, Twoway, Collision, Gravity, Tween, Keyboard') |
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.attr({ |
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x: 50, |
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y: 263 |
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}) |
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.reel('moveRight', 500, [[0, 2], [1, 2], [2, 2], [3, 2], [4, 2], [5, 2], [6, 2], [7, 2]]) |
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.reel('moveLeft', 500, [[0, 1], [1, 1], [2, 1], [3, 1], [4, 1], [5, 1], [6, 1], [7, 1]]) |
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.twoway(200, 510) |
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.gravity('FloorTile') |
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.gravityConst(GRAVITY_STRENGTH) |
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.bind('KeyDown', |
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function (e) { |
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if (Crafty.keydown['37'] && Crafty.keydown['39']) { |
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this.pauseAnimation(); |
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this.resetAnimation(); |
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this.isMoving = false; |
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return; |
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} |
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if (e.key === Crafty.keys.RIGHT_ARROW && !this.isJumping) { |
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this.animate('moveRight', -1); |
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} |
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else if (e.key === Crafty.keys.LEFT_ARROW && !this.isJumping) { |
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this.animate('moveLeft', -1); |
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} |
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this.isMoving = true; |
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} |
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) |
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.bind('KeyUp', |
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function (e) { |
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if ((this.isPlaying('moveRight') && e.key === Crafty.keys.RIGHT_ARROW) || |
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(this.isPlaying('moveLeft') && e.key === Crafty.keys.LEFT_ARROW)) { |
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this.pauseAnimation(); |
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this.resetAnimation(); |
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/* Check/Set the player's moving state */ |
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if (e.key === Crafty.keys.RIGHT_ARROW || e.key === Crafty.keys.LEFT_ARROW) { |
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this.isMoving = false; |
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return; |
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} |
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} |
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/* Kickstart animation if we need to */ |
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if (this.isDown('RIGHT_ARROW') && !this.isJumping) { |
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this.animate('moveRight', -1); |
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this.isMoving = true; |
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} |
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else if (this.isDown('LEFT_ARROW') && !this.isJumping) { |
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this.animate('moveLeft', -1); |
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this.isMoving = true; |
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} |
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} |
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) |
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.bind('Moved', function (obj) { |
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if (this.x >= (SCREENWIDTH / 2) && this.x <= 3440) { |
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Crafty.viewport.scroll('_x', (this.x - (SCREENWIDTH / 2)) * -1); |
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displayScore(); |
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displayTimeLeft(); |
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} |
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}) |
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.bind('CheckJumping', function (ground) { |
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this.isJumping = true; |
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var canJump, doubleJump; |
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if(this.canJump === false && !this.inDoubleJumpMode){ |
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/* Lets check if there is a platform above us */ |
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var platforms = Crafty('Tile'); |
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for(var i=0; i < platforms.length; i++){ |
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var platform = platforms[i]; |
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platform = Crafty(platform); |
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if(platform.x < this.x && platform.y < this.y && platform.x+160 > this.x){ |
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/* We probably have a platform above us so don't allow double jump */ |
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canJump = false; |
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doubleJump = false; |
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break; |
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} |
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} |
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this.canJump = canJump !== undefined ? canJump : true; |
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this.inDoubleJumpMode = doubleJump !== undefined ? doubleJump : true; |
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} |
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else if(this.inDoubleJumpMode){ |
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this.canJump = false; |
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} |
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this.pauseAnimation(); |
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this.resetAnimation(); |
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//this.animate('jump', 1) |
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this.sprite(this.currentDirection === RIGHT ? 6 : 2, 4); |
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}) |
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.bind('LandedOnGround', function (ground) { |
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if (this.isJumping) { |
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this.isJumping = false; |
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this.gravityConst(GRAVITY_STRENGTH); |
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/* We cannot get the direction from the velocity. We'll use the current loaded sprite animation */ |
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this.sprite(0, this.getReel().id === 'moveRight' ? 2 : 1); |
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/* We may need to enable controls here as we may have disabled them */ |
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if(this.bounced){ |
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this.velocity().x = 0; |
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this.bounced = false; |
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} |
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this.inDoubleJumpMode = false; |
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} |
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/* Will need to enable controls in some circumstances */ |
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this.enableControl(); |
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}) |
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.bind('NewDirection', function (obj) { |
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/* 0 is neither right nor left so we don't care about it */ |
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if (obj.x === 0) return; |
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this.currentDirection = obj.x === 1 ? RIGHT : LEFT; |
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if (this.currentDirection === RIGHT && !this.isJumping) { |
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if (this.isMoving) { |
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/* Start running again */ |
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this.animate('moveRight', -1); |
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}else { |
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this.sprite(0, 2); |
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} |
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} |
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else if (this.currentDirection === LEFT && !this.isJumping) { |
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if (this.isMoving) { |
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/* Start running again */ |
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this.animate('moveLeft', -1); |
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}else { |
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this.sprite(0, 1); |
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} |
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} |
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}) |
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.checkHits('Platform') |
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.bind('HitOn', function(hitData){ |
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console.log('Hit Platform:', 'x:', hitData[0].obj.x, 'y:', hitData[0].obj.y, 'PlayerX:', this.x, 'PlayerY:', this.y); |
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/* If underneath player, bounce back down */ |
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this.disableControl(); |
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this.gravityConst(1000); |
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this.velocity().x = 0; |
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this.velocity().y = 0; |
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Crafty.e("Delay").delay(reinstateMovement, 500, 1); |
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}) |
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.bind('TweenEnd', function(prop){ |
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if(this.alpha === 0.0){ |
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this.destroy(); |
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} |
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}) |
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.bind(EVENT_PLAYER_DIE, function () { |
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this.tween({ alpha: 0.0 }, 1000); |
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Crafty.trigger(EVENT_GAME_OVER); |
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}) |
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.bind(EVENT_PLAYER_HIT_WALKER, function () { |
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this.vy = -400; |
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this.tween({ y: this.y - 100 }, 300); |
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}) |
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.bind('EnterFrame', function(){ |
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if(this.x <= -6) this.x = -5; |
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if(this.x >= 3785) this.x = 3784; |
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}) |
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|
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/* Set player defaults */ |
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_player.isJumping = false; |
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_player.currentDirection = RIGHT; |
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_player.isMoving = false; |
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_player.reel('moveRight'); |
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_player.bounced = false; |
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_player.inDoubleJumpMode = false; |
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} |
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|
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function spawnWalkers () { |
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Crafty.e('Delay').delay(spawnWalker, Crafty.math.randomInt(2000, 8000), -1); |
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} |
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function spawnWalker () { |
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Crafty.e('Walker') |
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.onHit('Player', function(hitData) { |
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var playerObj = hitData[0].obj; |
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if(playerObj.isJumping){ |
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if(this.velocity().x !== 0){ |
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pauseAndResetAnimation(this); |
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this.animate('die', 1); |
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this.velocity().x = 0; |
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this.tween({alpha: 0}, 750); |
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Crafty.trigger(EVENT_PLAYER_HIT_WALKER); |
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} |
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} |
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else{ |
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/* We need to check this is a genuine collision */ |
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if(this.getReel().id === 'die') return; |
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this.velocity().x = 0; |
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this.x += 5; |
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pauseAndResetAnimation(this); |
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this.reelPosition(1); |
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Crafty.trigger(EVENT_PLAYER_DIE); |
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} |
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}); |
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Crafty.e('Walker'); |
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} |
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function generateMap () { |
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const Y_OFFSET = 600 - (tileMap.length * TILE_HEIGHT); |
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tileMap.map(function (tileRow, rowIdx) { |
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var xPos = 0; |
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var yPos = 0; |
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tileRow.map(function (tile, tileIdx) { |
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yPos = Y_OFFSET + (rowIdx * 60); |
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var tileType = tile[0]; |
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var tileNum = tile[1]; |
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if (tileType === 0){ |
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xPos += (tileNum * 80); |
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} |
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if (tileType === 1) { |
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for(var i=0; i < tileNum; i++){ |
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Crafty.e('FloorTile, 2D, DOM, Image, Collision') |
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.attr({ x: xPos, y: yPos, w: TILE_WIDTH, h: TILE_HEIGHT }) |
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.image(Crafty.assets['img/tile-' + tileType + '.png'].src); |
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xPos += 80; |
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} |
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} |
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else{ |
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if (tileType === 4) { |
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Crafty.e('Platform') |
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.setImage('img/platform.png') |
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.setPlatform(xPos, yPos, 1) |
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.addCoins(Crafty.math.randomInt(1,2)); |
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} |
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else if (tileType === 8) { |
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Crafty.e('Platform') |
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.setImage('img/platformx2.png') |
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.setPlatform(xPos, yPos, 2) |
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.addCoins(Crafty.math.randomInt(1,2)); |
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} |
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xPos += 80; |
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} |
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}); |
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}); |
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} |
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|
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function displayText () { |
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displayScore(); |
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displayTimeLeft(); |
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} |
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|
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function displayTimeLeft () { |
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if(_timeLeftDisplay){ |
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_timeLeftDisplay.destroy(); |
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} |
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_timeLeftDisplay = Crafty.e("2D, DOM, Text") |
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.attr({ x: 720 - Crafty.viewport._x, y: 20 }) |
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.text(__STATE.timeLeft) |
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.textColor('#FF0000') |
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.textFont({ size: '14px', weight: 'bold', family: 'Courier New' }); |
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} |
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|
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function displayScore () { |
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if(_scoreDisplay){ |
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_scoreDisplay.destroy(); |
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} |
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_scoreDisplay = Crafty.e("2D, DOM, Text") |
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.attr({ x: 750 - Crafty.viewport._x, y: 20 }) |
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.text(pad(__STATE.currentScore, 3)) |
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.textColor('#FF0000') |
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.textFont({ size: '14px', weight: 'bold', family: 'Courier New' }); |
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} |
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|
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function displayGameOver(){ |
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if(Crafty("GameOver")) |
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Crafty("GameOver").destroy(); |
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|
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Crafty.e("GameOver, 2D, DOM, Text") |
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.attr({ x: 280 - Crafty.viewport._x, y: 280, z:100, w: 250 }) |
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.text("GAME OVER").textColor('#FF0000').textFont({ size: '36px', weight: 'bold', family: 'Courier New' }); |
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} |
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|
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function displayLevelComplete(){ |
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if(Crafty("LevelComplete")) |
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Crafty("LevelComplete").destroy(); |
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|
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Crafty.e("LevelComplete, 2D, DOM, Text") |
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.attr({ x: 270 - Crafty.viewport._x, y: 280, z:100, w: 350 }) |
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.text("LEVEL COMPLETE").textColor('#33FF33').textFont({ size: '36px', weight: 'bold', family: 'Courier New' }); |
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} |
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|
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function updateScore(amt){ |
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__STATE.currentScore += amt; |
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displayScore(); |
347 |
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} |
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|
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function pad(num, size) { |
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var s = num+""; |
351 |
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while (s.length < size) s = "0" + s; |
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return s; |
353 |
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} |
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|
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function setupGlobalBindings () { |
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Crafty.bind(EVENT_GAME_OVER, function(){ |
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_player.disableControl(); |
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pauseAndResetAnimation(_player); |
359 |
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displayGameOver(); |
360 |
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}) |
361 |
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} |
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|
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function pauseAndResetAnimation (ent){ |
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ent.pauseAnimation(); |
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ent.resetAnimation(); |
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} |
367 |
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|
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function reinstateMovement () { |
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_player.enableControl(); |
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} |
371 |
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|
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function reset () { |
373 |
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_player = null; |
374 |
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_viewportX = 0; |
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_scoreDisplay = ""; |
376 |
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_gameStartTime = (new Date()).getTime(); |
377 |
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_timeLeftDisplay = ""; |
378 |
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_secondsTotal = 120; |
379 |
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|
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__STATE.gameStarted = false; |
381 |
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__STATE.gameOver = false; |
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__STATE.timeLeft = _secondsTotal; |
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__STATE.currentScore = 0; |
384 |
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__STATE.gameOverIsDisplaying = false; |
385 |
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__STATE.numCoinsToCollect = -1; |
386 |
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|
387 |
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/* Position viewport */ |
388 |
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Crafty.viewport.scroll('_x', 0) |
389 |
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} |
390 |
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|
391 |
387 |
Crafty.bind('EnterFrame', function(){ |
392 |
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if(__STATE.gameStarted === false) |
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return; |
394 |
390 |
|
395 |
391 |
if(Crafty.frame() % 50 === 1){ |
396 |
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__STATE.timeLeft = _secondsTotal - Math.round(((new Date()).getTime() - _gameStartTime) / 1000); |
397 |
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displayTimeLeft(); |
398 |
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} |
399 |
395 |
if(__STATE.gameOver && !__STATE.gameOverIsDisplaying){ |
400 |
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/* Display Game Over */ |
401 |
397 |
Crafty.trigger(EVENT_GAME_OVER); |
402 |
398 |
__STATE.gameOverIsDisplaying = true; |
403 |
399 |
} |
404 |
400 |
}) |