using System;

namespace Science.Physics.GeneralPhysics
{
	/// <summary>
	/// DisplacementCurrent
	/// </summary>
	public class DisplacementCurrent : Scalar
	{
		public DisplacementCurrent()
		{
		}
        private Scalar.FunctionOfTime f;
		public DisplacementCurrent(ElectricFlux PhiE, Time t)
		{
            f = PhiE.ScalarFunctionOfTime;
            Calculus.Function<double,double> func
            = new Calculus.Function<double,double>(ff);
			this.Magnitude = Constant.PermittivityOfFreeSpace
                *Calculus.Differentiation(func,t.s);			
		}
        private double ff(double t)
        {
            Time tt = new Time();
            tt.s = t;
            Scalar s = f(tt);
            return s.Magnitude;
        }
		public double A
		{
			get{return this.Magnitude;}
			set{this.Magnitude=value;}
		}
        public override string ToString()
        {
            return base.ToString() + "(A)";
        }
	}
}