finished part one of problem three

ProblemThree/Program.cs

@@ -10,6 +10,33 @@ namespace ProblemThree
     {
         static void Main(string[] args)
         {
+            var wireOneCoordinates = LoadWireIntoMemory(WireOne).ToArray();
+            var wireTwoCoordinates = LoadWireIntoMemory(WireTwo).ToArray();
+
+            List<(int Distance, string Description)> intersections = new List<(int Distance, string Description)>();
+
+            for (var i = 0; i < wireOneCoordinates.Length - 1; i++)
+            {
+                var wireOneVector = new Vector(wireOneCoordinates[i], wireOneCoordinates[i + 1]);
+
+                for (var j = 0; j < wireTwoCoordinates.Length - 1; j++)
+                {
+                    var wireTwoVector = new Vector(wireTwoCoordinates[j], wireTwoCoordinates[j + 1]);
+
+                    var intersectionPoint = GetIntersection(wireOneVector, wireTwoVector);
+                    if (intersectionPoint != null)
+                    {
+                        var distance = GetManhattanDistance((0, 0), intersectionPoint.Value);
+                        var description = "X:" + intersectionPoint.Value.X + " Y:" + intersectionPoint.Value.Y + " D:" + distance;
+
+                        Console.WriteLine(description);
+                        intersections.Add((distance, description));
+                    }
+                }
+            }
+
+            Console.WriteLine(intersections.OrderBy(x => x.Distance).First().Description);
+            Console.ReadLine();
         }
 
         static List<(int X, int Y)> LoadWireIntoMemory(string strWire)
@@ -54,17 +81,21 @@ namespace ProblemThree
             if (vectorOne.IsVertical && vectorTwo.IsVertical)
                 return null;
 
-            (int X, int Y) intersectionCoordinate;
-            if (vectorOne.IsVertical)
-                intersectionCoordinate.X = vectorOne.CoordinateOne.X;
-            else if (vectorTwo.IsVertical)
-                intersectionCoordinate.X = vectorTwo.CoordinateOne.X;
-            if (vectorOne.IsHorizontal)
-                intersectionCoordinate.Y = vectorOne.CoordinateOne.Y;
-            else if (vectorTwo.IsHorizontal)
-                intersectionCoordinate.Y = vectorTwo.CoordinateOne.Y;
+            var horizontalVector = vectorOne.IsHorizontal ? vectorOne : vectorTwo;
+            var verticalVector = vectorOne.IsVertical ? vectorOne : vectorTwo;
 
-            return null; // TODO
+            (int X, int Y) intersectionCoordinate;
+            intersectionCoordinate.X = verticalVector.CoordinateOne.X;
+            intersectionCoordinate.Y = horizontalVector.CoordinateOne.Y;
+
+            if (intersectionCoordinate.X < horizontalVector.SmallX || 
+                intersectionCoordinate.X > horizontalVector.BigX)
+                return null;
+            if (intersectionCoordinate.Y < verticalVector.SmallY || 
+                intersectionCoordinate.Y > verticalVector.BigY)
+                return null;
+
+            return intersectionCoordinate;
         }
 
         enum Direction
@@ -82,6 +113,10 @@ namespace ProblemThree
 
             public bool IsHorizontal => CoordinateOne.Y - CoordinateTwo.Y == 0;
             public bool IsVertical => CoordinateOne.X - CoordinateTwo.X == 0;
+            public int SmallX => new List<int>() { CoordinateOne.X, CoordinateTwo.X }.Min();
+            public int SmallY => new List<int>() { CoordinateOne.Y, CoordinateTwo.Y }.Min();
+            public int BigX => new List<int>() { CoordinateOne.X, CoordinateTwo.X }.Max();
+            public int BigY => new List<int>() { CoordinateOne.Y, CoordinateTwo.Y }.Max();
 
             public Vector() { }
 
@@ -94,5 +129,8 @@ namespace ProblemThree
 
         static string WireOne = "R1009,D335,L942,D733,L398,U204,L521,D347,L720,U586,R708,D746,L292,U416,L824,U20,R359,D828,R716,U895,L498,D671,L325,D68,L667,U134,L435,D44,R801,U654,R188,U542,L785,D318,L806,U602,L465,U239,R21,U571,R653,U436,L52,U380,R446,D960,R598,U590,L47,U972,L565,D281,R790,U493,R864,D396,R652,D775,L939,D284,R554,U629,L842,D837,R554,D795,R880,D301,R948,U974,L10,D898,R588,D743,L334,U59,L413,U511,L132,U771,R628,D805,R465,D561,R18,D169,L580,D99,L508,U964,L870,D230,L472,U897,L85,U306,L103,U322,L637,U464,R129,D514,R454,U479,R801,U18,R929,U181,L113,D770,L173,D124,L122,U481,L666,D942,L534,U608,R90,U576,L641,U249,L857,U197,R783,D92,L938,D192,L698,D862,R995,U12,R766,D323,R934,U315,R956,D234,R983,D246,L153,U26,L779,D628,R174,D385,L758,D486,R132,U414,R915,D511,L152,D309,L708,D755,L679,D166,L699,U734,R55,D224,L582,U798,L348,U219,L304,U621,L788,D538,R781,D509,R486,U581,R759,D892,R16,D552,L82,D618,L309,D610,L645,U146,L328,U569,L307,D385,L249,D231,R928,U681,R384,D337,R715,D798,L788,D604,R517,U766,R368,U430,L49,U236,R621,U656,R997,U268,L18,D789,L935,D87,L670,U35,R463,D71,R268,U728,R693,D863,R656,D654,L350,U796,L72,U562,R56,U10,L651,D751,L557,D518,R901,D741,R787,D332,R723,D980,R206,U670,R645,D927,L641,D863,R478,D568,L858,D990,L124,D864,L162,U361,L407,U674,R508,D284,L675,D794,L138,U55,L781,U37,R956,D364,L111,U721,L91,U559,L852,U351,R994,U446,L162,D345,R92,D941,R572,U185,R615,D590,R459,D313,R127,D315,R96,U751,R210,D620,L790,U826,R410,D652,R549,D698,L805,U814,L364,U905,L96,U997,L689";
         static string WireTwo = "L1008,D451,L146,D628,R877,U486,L464,U815,L119,U208,R686,U477,L510,D353,R189,D437,R461,D645,R639,U650,R491,D744,L798,U514,R598,U64,R668,U771,R21,U782,L564,U632,R23,U112,R947,U649,L205,D804,R277,U683,L828,U662,R890,U420,L908,U484,R535,D515,R390,U7,L287,D967,R497,U502,L893,D851,R426,D656,R622,U46,L106,U590,R646,D29,R467,D896,L155,U382,L992,D189,L34,U16,R132,U35,L586,U812,L539,D409,R776,D42,R58,U323,R569,D965,R648,D789,R478,D587,R162,D834,R979,D993,L944,U84,R93,U903,R491,U713,L646,U235,R120,U286,L919,U34,L662,U834,L812,D271,L73,U410,L758,U210,R712,U581,L520,D654,L981,D516,R312,U123,L153,U433,R368,U606,L882,U362,L261,U587,R441,D691,L699,U135,L825,D25,R142,U191,L358,D554,L487,D802,L542,D266,R283,U222,R113,D259,R828,U182,R402,U627,R769,D426,L768,U571,R118,U684,R803,D430,R942,U514,R711,D225,R299,U45,L214,U712,L673,U787,L164,D703,L616,D587,R624,D326,L614,D779,L904,D563,L98,U137,R687,U425,R615,U671,L361,D47,L767,D951,R791,D116,R664,U704,R291,U535,L322,D989,R467,U7,L974,D276,R901,U51,L567,D641,R112,U102,R753,D127,R486,D143,R259,U212,L97,U505,R377,U473,R514,D912,L928,U401,R772,D416,R695,U784,L524,D341,R402,U749,L1,U1,L109,U921,L754,U66,L927,U708,R551,D687,R129,D346,L408,D330,L300,D920,R170,D353,R97,D74,R850,D511,R275,U872,L748,U344,R610,D391,R963,D98,L89,U259,R651,U651,L31,D142,L104,U770,L482,D677,R823,D110,L606,U897,L631,U437,L551,D550,R301,D762,R349,D824,R260,U438,R249,D636,L386,U926,R367,U231,R752,U854,L481,D764,R516,D273,L726,D778,R483,U513,R129,D135,L224";
+
+        static string SampleWireOne = "R8,U5,L5,D3";
+        static string SampleWireTwo = "U7,R6,D4,L4";
     }
 }