using System;

namespace Science.Physics.GeneralPhysics
{
	/// <summary>
	/// AngularAcceleration
	/// </summary>
	public class AngularAcceleration : Vector
	{
		private void SetDim()
		{
			this.DimensionMass = 0;
			this.DimensionLength = 0;
			this.DimensionTime = -2;
		}
		public AngularAcceleration()
		{
			SetDim();
		}		
		public double radPERsSQUARE
		{
			get{return this.Norm;}
		}
       
		public AngularAcceleration(AngularVelocity final, AngularVelocity initial, Time t)
		{
			SetDim();
			this.X = (final.X - initial.X) / t.s;
			this.Y = (final.Y - initial.Y) / t.s;
			this.Z = (final.Z - initial.Z) / t.s;
		}

		public AngularAcceleration(MomentOfInertia I, TotalTorque tau)
		{
			SetDim();
			Tensor iI = I.Inverse;
			Vector v = new Vector();
			v.X = tau.X;
			v.Y = tau.Y;
			v.Z = tau.Z;
			Vector p = iI * v;
			this.X = p.X;
			this.Y = p.Y;
			this.Z = p.Z;
		}	

		public AngularAcceleration(AngularVelocity omega, Time t) 
		{
			SetDim();
		
            Vector v = VectorCalculus.TimeDerivative(omega,t);

            this.X = v.X;
            this.Y = v.Y;
            this.Z = v.Z;
   		}

        public override string ToString()
        {
            return base.ToString() + "(rad/s^2)";
        }
	}
}