rubentd / tanks Goto Github PK

client.on('joinGame', function(tank){
	console.log(tank.id + ' joined the game');
	var initX = getRandomInt(40, 900);
	var initY = getRandomInt(40, 500);
	client.emit('addTank', { id: tank.id, type: tank.type, isLocal: true, x: initX, y: initY, hp: TANK_INIT_HP });
	client.broadcast.emit('addTank', { id: tank.id, type: tank.type, isLocal: false, x: initX, y: initY, hp: TANK_INIT_HP} );

	game.addTank({ id: tank.id, type: tank.type, hp: TANK_INIT_HP});
});

client.on('initialize', function(tankdata){
	var BALL_SPEED = tankdata.ballspeed;
	var TANK_INIT_HP = tankdata.tankhp;
	var TANK_DAMAGES = tankdata.tankdamages;
});

client.on('sync', function(data){
	//Receive data from clients
	if(data.tank != undefined){
		game.syncTank(data.tank);
	}
	//update ball positions
	game.syncBalls();
	//Broadcast data to clients
	client.emit('sync', game.getData());
	client.broadcast.emit('sync', game.getData());

	//I do the cleanup after sending data, so the clients know
	//when the tank dies and when the balls explode
	game.cleanDeadTanks();
	game.cleanDeadBalls();
	counter ++;
});

client.on('shoot', function(ball){
	var ball = new Ball(ball.ownerId, ball.alpha, ball.x, ball.y );
	game.addBall(ball);
});

client.on('chatMessage', function(message, tankname){
	console.log('['+tankname+'] : '+message);
	client.emit('recieveChatMessage', message, tankname);
	client.broadcast.emit('recieveChatMessage', message, tankname);
});

client.on('leaveGame', function(tankId){
	console.log(tankId + ' has left the game');
	game.removeTank(tankId);
	client.broadcast.emit('removeTank', tankId);
});

fly: function(){
	//move to trayectory
	var speedX = BALL_SPEED * Math.sin(this.alpha);
	var speedY = -BALL_SPEED * Math.cos(this.alpha);
	this.x += speedX;
	this.y += speedY;
}

addTank: function(tank){
	this.tanks.push(tank);
},

addBall: function(ball){
	this.balls.push(ball);
},

removeTank: function(tankId){
	//Remove tank object
	this.tanks = this.tanks.filter( function(t){return t.id != tankId} );
},

//Sync tank with new data received from a client
syncTank: function(newTankData){
	this.tanks.forEach( function(tank){
		if(tank.id == newTankData.id){
			tank.x = newTankData.x;
			tank.y = newTankData.y;
			tank.baseAngle = newTankData.baseAngle;
			tank.cannonAngle = newTankData.cannonAngle;
		}
	});
},

//The app has absolute control of the balls and their movement
syncBalls: function(){
	var self = this;
	//Detect when ball is out of bounds
	this.balls.forEach( function(ball){
		self.detectCollision(ball);

		if(ball.x < 0 || ball.x > WIDTH
			|| ball.y < 0 || ball.y > HEIGHT){
			ball.out = true;
		}else{
			ball.fly();
		}
	});
},

//Detect if ball collides with any tank
detectCollision: function(ball){
	var self = this;

	this.tanks.forEach( function(tank){
		if(tank.id != ball.ownerId
			&& Math.abs(tank.x - ball.x) < 30
			&& Math.abs(tank.y - ball.y) < 30){
			//Hit tank
			self.hurtTank(tank);
			ball.out = true;
			ball.exploding = true;
		}
	});
},

hurtTank: function(tank){
	tank.hp -= TANK_DAMAGES;
},

getData: function(){
	var gameData = {};
	gameData.tanks = this.tanks;
	gameData.balls = this.balls;

	return gameData;
},

cleanDeadTanks: function(){
	this.tanks = this.tanks.filter(function(t){
		return t.hp > 0;
	});
},

cleanDeadBalls: function(){
	this.balls = this.balls.filter(function(ball){
		return !ball.out;
	});
},

increaseLastBallId: function(){
	this.lastBallId ++;
	if(this.lastBallId > 1000){
		this.lastBallId = 0;
	}
}