namespace TACO
{
	using System;
	using System.Collections;

	public abstract class Thingie : Part
	{
		private double mX               = 0;
		private double mY               = 0;
		private double mVelocityX       = 0;
		private double mVelocityY       = 0;
		private double mWeightFactor    = 1;
		private double mWeightTolerance = 0;
		private ArrayList mSlots        = new ArrayList();

		public Thingie(string id)
			: base(id)
		{
		}

		public double X
		{
			get { return mX;  }
			set { mX = value; }
		}

		public double Y
		{
			get { return mY;  }
			set { mY = value; }
		}

		public virtual double VelocityX
		{
			get { return mVelocityX;  }
			set { mVelocityX = value; }
		}

		public virtual double VelocityY
		{
			get { return mVelocityY;  }
			set { mVelocityY = value; }
		}

		public virtual bool Movable
		{
			get { return true; }
		}

		public bool Moving
		{
			get { return VelocityX != 0.0 || VelocityY != 0.0; }
		}

		public bool Falling
		{
			get { return VelocityY > 0.0; }
		}

		public abstract double NaturalWeight
		{
			get;
		}

		public double WeightFactor
		{
			get { return mWeightFactor;  }
			set { mWeightFactor = value; }
		}

		public double WeightTolerance
		{
			get { return mWeightTolerance;  }
			set { mWeightTolerance = value; }
		}

		public virtual bool SizableX
		{
			get { return false; }
		}

		public virtual bool SizableY
		{
			get { return false; }
		}

		public ArrayList Slots
		{
			get { return mSlots; }
		}
	}
}