public bool CanDetect(Detectable detectable)
{
var dist = this.GetDistance(detectable);
if (dist > __DetectRange ||
!this.SameQuadrant(this.EndPoint, detectable.Location) ||
this.GetDistance(detectable.Location, new Point(0, 0)) > this.Length)
{
return(false);
}
return(true);
}
private void Spawn()
{
//remove this test
if (this._Detectables.Count > 0)
{
return;
}
var p = new Point(100, 100);
var ufo = new Detectable
{
Bounds = new Rectangle(0, 0, this._View.Size.Width, this._View.Size.Height),
Location = p
};
this._Detectables.Add(ufo);
}
private double GetDistance(Detectable detectable)
{
var startPoint = this.StartPoint;
var endPoint = this.EndPoint;
var x0 = startPoint.X;
var y0 = startPoint.Y;
var x1 = endPoint.X;
var y1 = endPoint.Y;
var xp = detectable.Location.X;
var yp = detectable.Location.Y;
var lambda = (((x1 - x0) * (xp - x0)) + ((y1 - y0) * (yp - y0)))
/
(Math.Pow(x1 - x0, 2) + Math.Pow(y1 - y0, 2));
var dist = Math.Sqrt(Math.Pow(xp - x0 - (lambda * (x1 - x0)), 2)
+ Math.Pow(yp - y0 - (lambda * (y1 - y0)), 2));
return(dist);
}