opensim/OpenSim/Region/Physics/Manager/PhysicsVector.cs

/*
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* THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS AND ANY
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*/

using System;


namespace OpenSim.Region.Physics.Manager
{
    public class PhysicsVector
    {
        public float X;
        public float Y;
        public float Z;

        public PhysicsVector()
        {
        }

        public PhysicsVector(float x, float y, float z)
        {
            X = x;
            Y = y;
            Z = z;
        }

        public static readonly PhysicsVector Zero = new PhysicsVector(0f, 0f, 0f);

        public override string ToString()
        {
            return "<" + X + "," + Y + "," + Z + ">";
        }

        // Operations
        public static PhysicsVector operator +(PhysicsVector a, PhysicsVector b)
        {
            return new PhysicsVector(a.X + b.X, a.Y + b.Y, a.Z + b.Z);
        }

        public static PhysicsVector operator -(PhysicsVector a, PhysicsVector b)
        {
            return new PhysicsVector(a.X - b.X, a.Y - b.Y, a.Z - b.Z);
        }

        public static PhysicsVector cross(PhysicsVector a, PhysicsVector b)
        {
            return new PhysicsVector(a.Y * b.Z - a.Z * b.Y, a.Z * b.X - a.X * b.Z, a.X * b.Y - a.Y * b.X);
        }

        public float length()
        {
            return (float)Math.Sqrt(X*X + Y*Y + Z*Z);
        }

        public static PhysicsVector operator / (PhysicsVector v, float f)
        {
            return new PhysicsVector(v.X / f, v.Y / f, v.Z / f);
        }

        public static PhysicsVector operator *(PhysicsVector v, float f)
        {
            return new PhysicsVector(v.X * f, v.Y * f, v.Z * f);
        }

        public static PhysicsVector operator *(float f, PhysicsVector v)
        {
            return v * f;
        }

        public virtual bool IsIdentical(PhysicsVector v, float tolerance)
        {
            PhysicsVector diff = this - v;
            float d = diff.length();
            if (d < tolerance)
                return true;

            return false;
        }
    }
}