public void ClampLength()
{
//too long
Vector v1 = new Vector(0, 6);
Vector v2 = VectorUtil.ClampLength(v1, 1, 5);
Assert.AreEqual(new Vector(0, 5), v2);
//too short
Vector v3 = new Vector(0, 0.5);
Vector v4 = VectorUtil.ClampLength(v3, 1, 5);
Assert.AreEqual(new Vector(0, 1), v4);
//just right
Vector v5 = new Vector(0, 4);
Vector v6 = VectorUtil.ClampLength(v5, 1, 5);
Assert.AreEqual(new Vector(0, 4), v6);
}