/*  
        ####  #####  ##### ####    ###  #   # ###### ###### ##     ##  #####  #     #      ########    ##    #  #  ##### 
       #   # #   #  ###   #   #  #####  ###    ##     ##   ##  #  ##    #    #     #     #   ##   #  #####  ###   ###
       ###  #   #  ##### ####   #   #   #   ######   ##   #########  #####  ##### ##### #   ##   #  #   #  #   # #####
       --
       Mario Gonzalez
*/
function Vector(x, y)
{
    
    if ( typeof x == 'Object' )
    {
        
        this.x = x.x;
        this.y = x.y;
        
    }
    else
    {
        
        this.x = x;
        this.y = y;
        
    }
    
    
};

Vector.prototype =
{
    
    cp: function()
    {
        
        return new Vector(this.x, this.y);
        
    },
    
    mul: function(factor)
    {
        
        this.x *= factor;
        this.y *= factor;
        return this;
        
    },
    
    mulNew: function(factor)
    {
        
        return new Vector(this.x * factor, this.y * factor);
        
    },
    
    add: function(vec)
    {
        
        this.x += vec.x;
        this.y += vec.y;
        return this;
        
    },
    
    addNew: function(vec)
    {
        
        return new Vector(this.x + vec.x, this.y + vec.y);
        
    },
    
    sub: function(vec)
    {
        
        this.x -= vec.x;
        this.y -= vec.y;
        return this;
        
    },
    
    subNew: function(vec)
    {
        
        return new Vector(this.x - vec.x, this.y - vec.y);
        
    },
    
    // angle in radians
    rotate: function(angle)
    {
        
        var x = this.x, y = this.y;
        this.x = x * Math.cos(angle) - Math.sin(angle) * y;
        this.y = x * Math.sin(angle) + Math.cos(angle) * y;
        return this;
        
    },
    
    // angle still in radians
    rotateNew: function(angle)
    {
        
        return this.cp().rotate(angle);
        
    },
    
    // angle in radians... again
    setAngle: function(angle)
    {
        
        var l = this.length();
        this.x = Math.cos(angle) * l;
        this.y = Math.sin(angle) * l;
        return this;
        
    },
    
    // RADIANS
    setAngleNew: function(angle)
    {
        
        return this.cp().setAngle(angle);
        
    },
    
    setLength: function(length)
    {
        
        var l = this.length();
        if ( l ) this.mul(length / l);
        else this.x = this.y = length;
        return this;
        
    },
    
    setLengthNew: function(length)
    {
        
        return this.cp().setLength(length);
        
    },
    
    normalize: function()
    {
        var l = this.length();
        this.x /= l;
        this.y /= l;
        return this;
        
    },
    
    normalizeNew: function()
    {
        
        return this.cp().normalize();
        
    },
    
    angle: function()
    {
        
        return Math.atan2(this.y, this.x);
        
    },
    
    collidesWith: function(rect)
    {
        
        return this.x > rect.x && this.y > rect.y && this.x < rect.x + rect.width && this.y < rect.y + rect.height;
        
    },
    
    length: function()
    {
        
        var length = Math.sqrt(this.x * this.x + this.y * this.y);
        if ( length < 0.005 && length > -0.005) return 0.000001;
        return length;
        
    },
    lengthSquared: function()
    {
        
        var lengthSquared = this.x * this.x + this.y * this.y;
 
        if ( lengthSquared < 0.005 && lengthSquared > -0.005) return 0;
        return lengthSquared;
        
    },
    
    is: function(test)
    {
        
        
        return typeof test == 'object' && this.x == test.x && this.y == test.y;
        
    },
    
    toString: function()
    {
        
        return '[Vector(' + this.x + ', ' + this.y + ') angle: ' + this.angle() + ', length: ' + this.length() + ']';
        
    }
    
    
};