Vertical sine wave

verticalsine.js

// Result: http://puu.sh/j19yl/d37b20ff08.png

this.position = 
{
    x: self.vpc.x + Math.cos(time * 0.002) * this.helpers.sineBetween(-200, 200, time * 0.02),
    y: self.vpc.y + Math.sin(time * 0.002) * this.helpers.sineBetween(200, 200, time * 0.02)
}    

this.viewportsize = viewportsize;
this.vpc = { x: this.viewportsize.w / 2, y: this.viewportsize.h / 2 }; // Viewportcenter
    
this.helpers = 
{
    sineBetween: function(min, max, t)
    {
        var halfRange = (max - min) / 2;
        return min + halfRange + Math.sin(t) * halfRange;
    },

    cosineBetween: function(min, max, t)
    {
        var halfRange = (max - min) / 2;
        return min + halfRange + Math.cos(t) * halfRange;
    }        
}