public void TestDistanceCalc()
{
Node n1 = new Node(6.8, 4.4);
Node n2 = new Node(-3.7, -11.2);
Arc a = new Arc(n1, n2);
// the Google calculated arc length = (((6.8 - (-3.7)) ^ 2) + ((4.4 - (-11.2)) ^ 2)) ^ (1/2) = 18.8045207331
double expectedResult = 18.8045207331;
double diff = Math.Abs(expectedResult - a.Length);
Assert.True(diff < 0.0000000001); // The expected (previously calculated) value has 10 digits after the decimal place.
// Therefore, the difference between the computed value and the expected value must be less than 1 * (10 ^ (-10)).
}
public void ComputeShortestPathBruteForce()
{
List<List<Node>> allPossiblePaths = ComputeAllPaths(_points);
List<Tuple<List<Node>, double>> allPathsWithLengths = new List<Tuple<List<Node>, double>>();
foreach (List<Node> pathway in allPossiblePaths)
{
Arc aOne = new Arc(_origin, pathway[0]);
Arc aTwo = new Arc(pathway[0], pathway[1]);
Arc aThree = new Arc(pathway[1], pathway[2]);
Arc aFour = new Arc(pathway[2], pathway[3]);
double length = aOne.Length + aTwo.Length + aThree.Length + aFour.Length;
allPathsWithLengths.Add(new Tuple<List<Node>, double>(pathway, length));
}
NumArcLengthsComputedAndSorted = allPossiblePaths.Count*4;
allPathsWithLengths.Sort((x, y) => x.Item2.CompareTo(y.Item2));
_shortestPath = allPathsWithLengths[0].Item1;
}