Forums » Help » Needs some help with the shoot where I click tutorial.

Hello Everyone,

I'm trying out some new things that will hopefully lead to a new game. I saw a tutorial on shooting where the users cursor is. I tried to implement it but I cant get it to work, when I run my game I get the following: http://imgur.com/DAhfzip ( sorry it is not the best quality. ) You can check out my player.js here: http://pastebin.com/Db533e4N

If someone could help me with this that would be great!

Thanks in advance!

When spawning a bullet, it doesn't look like you're providing an angle. Thus, the bullet will always move in the default direction.

Thank you for your answer. I've been playing around with that for a while but I can't get it to work I will get this error: http://i.imgur.com/425Gpuq.png

which are these 2 lines:

var vely = Math.sin(this.10) * this.desiredVel; 
var velx =  Math.cos(this.10) * this.desiredVel;

Hey Bram,
a while ago i had a small game with that problem.
First of all you need to tell your EntityBullet where you clicked:

//player.js
if( ig.input.pressed('shoot1')  ) {
	ig.game.spawnEntity( EntityProjectile, 
		this.pos.x, this.pos.y, 
		{mouse: ig.input.mouse } );
}

Now we can access the mouse coords in the constructor. In my case the player is always in the middle of the screen, so i just need to set the click position in relation to the player

init: function( x, y, settings ) {
	var mx = settings.mouse.x - ig.system.width/2;
	var my = settings.mouse.y - ig.system.height/2;
},

Now its simple Math, we need the direction vector, so we need the length and divide it with every point to get a vector with the length = 1 with the same direction. then we can set the velocity to a defined speed

var vLength = Math.sqrt( Math.pow(mx ,2) + Math.pow(my ,2) );
this.vel.x = (mx / vLength) * this.speed;
this.vel.y = (my / vLength) * this.speed;

Here is the complete code for my projectile: http://pastebin.com/eJTUEVYN

Quote from bram
which are these 2 lines:

##
var vely = Math.sin(this.10) * this.desiredVel;
var velx = Math.cos(this.10) * this.desiredVel;
##

Hey bram.

Property names cannot start with a number.

So this.10 is not legal.

Did you mean just 10?

Thank you all for your help! I got it working! Not perfect but ill figure it out!

Thanks!

Bram