public SPoint Down(SPoint Point_) // return : Vector
{
if (CBase.Distance(_Center, Point_) > _InputRadius)
{
return(null);
}
_Enabled = true;
return(Move(Point_));
}
public SPoint Move(SPoint Point_) // return : Vector
{
if (!_Enabled)
{
return(null);
}
_Vector.X = Point_.X - _Center.X;
_Vector.Y = Point_.Y - _Center.Y;
var Distance = CBase.Distance(_Center, Point_);
if (Distance > _EffectiveRadius)
{
var Ratio = _EffectiveRadius / Distance;
_Vector.X *= Ratio;
_Vector.Y *= Ratio;
}
return(_Vector);
}