airplane_game/index.html at master · codingdojoco/airplane_game · GitHub

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<html>
<head>
	<title>Airplane Shooting Game</title>
	<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"></script>

	<style>
		#canvas{
			position:relative;
			border:1px solid silver;
			width:500px;
			height:400px;
		}
		.bullet{
			position:absolute;
			background-color:red;
			border: 1px solid red;
			width:10px;
			height:10px;
			border-radius:10px;
		}
		.enemy_plane{
			position:absolute;
		}
	</style>
</head>
<body>

	<div id="canvas">
		<img src="airplane.gif" id="my_plane" style="position:absolute; top:300px; left:200px;" />
	</div>

	Use the arrows to move the airplane and space bar to shoot.  No collission system built yet but you can make the game a lot better.  The codes were built quickly and need quite a bit of refactoring.

	<script type="text/javascript">


	function GameEngine()
	{
		//create a new airplane object
		var airplane = new MyAirplane();
		var bullets = [];
		var bullets_total = 0;
		var keyPressed = [];
		var enemies = [];
		//create two enemies

		this.createNewEnemy = function()
		{
			var enemy = new EnemyPlane({x:parseInt(Math.random()*6)*80, y:parseInt(Math.random()*3)*80}, enemies.length, parseInt(Math.random()*2));
			enemies.push(enemy);
			console.log(enemies);
		}

		this.createNewEnemy();
		this.createNewEnemy();
		this.createNewEnemy();
		this.createNewEnemy();

		//game loop that goes forever
		this.loop = function()
		{
			airplane.draw();

			for(var i=0; i<bullets.length; i++)
			{
				bullets[i].moveUp();
			}
		}

		//to detect multiple keys being pressed
		$(document).keydown(function(e) {
			keyPressed[e.keyCode] = true;

			if(keyPressed[37])	//left arrow
				airplane.performAction("MOVE_LEFT");
			if(keyPressed[39]) //right arrow
				airplane.performAction("MOVE_RIGHT");
			if(keyPressed[38])	//left arrow
				airplane.performAction("MOVE_UP");
			if(keyPressed[40]) //right arrow
				airplane.performAction("MOVE_DOWN");
			if(keyPressed[32])	//space key
			{
				bullet = new Bullet({x: airplane.position.x+32, y: airplane.position.y-12}, bullets_total++); //create a new bullet
				bullets.push(bullet); //store the bullet in the bullets array
			}
		}).keyup(function(e) {
			delete keyPressed[e.keyCode];
		});

		setInterval(this.loop, 50);
	}

	function MyAirplane()
	{
		this.position = {x:200, y:300}

		this.draw = function()
		{
			$('#my_plane').css({top: this.position.y+"px", left: this.position.x+"px" });
		}
		this.performAction = function(action)
		{
			if(action == "MOVE_LEFT")
				this.position.x -= 10;
			else if(action == 'MOVE_RIGHT')
				this.position.x += 10;
			else if(action == 'MOVE_UP')
				this.position.y -= 10;
			else if(action == 'MOVE_DOWN')
				this.position.y += 10;
		}
	}

	function Bullet(initial_coordinates, id)
	{
		this.position = {x:initial_coordinates.x, y:initial_coordinates.y};
		this.bullet_html_id = id;

		this.initialize = function()
		{
			$('#canvas').append('<div class="bullet" id="bullet'+this.bullet_html_id+'"></div>'); //create the bullet
			this.draw();	//update the coordinates
		}

		this.draw = function()
		{
			$('#bullet'+this.bullet_html_id).css({top: this.position.y+"px", left: this.position.x+"px" });
		}

		this.moveUp = function()
		{
			this.position.y -= 10;
			this.draw();
		}

		this.initialize();
	}

	function EnemyPlane(initial_coordinates, id, type)
	{
		this.position = {x:initial_coordinates.x, y:initial_coordinates.y};
		this.plane_html_id = id;

		this.initialize = function(type)
		{
			$('#canvas').append('<img class="enemy_plane" src="enemy'+type+'.gif" id="enemy'+this.plane_html_id+'" />'); //create the bullet
			this.draw();	//update the coordinates
		}

		this.draw = function()
		{
			$('#enemy'+this.plane_html_id).css({top: this.position.y+"px", left: this.position.x+"px" });
		}

		this.initialize(type);

	}

	var engine = new GameEngine();


	</script>

</body>
</html>