day9 finished

day9-2.py

@@ -1,3 +1,39 @@
+gridVisited =[['#']]
+posHead = [0, 0]
+posTail = []
+
+# drawgrid only used for visualized debugging
+def drawGrid():
+    visualGrid = []
+
+    for yCoord in range(len(gridVisited)):
+        visualGridLine = []
+
+        for xCoord in range(len(gridVisited[0])):
+            if posHead[0] == yCoord and posHead[1] == xCoord:
+                visualGridLine.append('H')
+                continue
+
+            haveAppended = False
+            for tp in range(9):
+                if posTail[tp][0] == yCoord and posTail[tp][1] == xCoord:
+                    visualGridLine.append(str(tp+1))
+                    haveAppended = True
+                    break
+
+            if not haveAppended:
+                if gridVisited[yCoord][xCoord] == '#':
+                    visualGridLine.append('#')
+                else:
+                    visualGridLine.append('.')
+
+        visualGrid.append(visualGridLine)
+
+    for ln in visualGrid:
+        print("".join(ln))
+
+    input("Ready for next move?")
+
 def expandGrid(direct):
     if direct == "U":
         gridVisited.insert(0, [])
@@ -31,6 +67,7 @@ def checkDist():
         tempa = one[1] - two[1]
         tempb = one[0] - two[0]
         tempc = tempa + tempb
+        tempd = tempa * tempb
         if one[0] == two[0]:
             if not(tempa == 1 or tempa == -1):
                 if tempa > 0:
@@ -43,28 +80,28 @@ def checkDist():
                     posTail[z][0] += 1
                 elif tempb < 0:
                     posTail[z][0] -= 1
-        elif (tempc == -1 or tempc == 1)  and tempb < 0:
+        elif (tempc in [-1, 0, 1])  and tempb < 0 and tempd != -1:
             posTail[z][0] -= 1
             posTail[z][1] += 1
-        elif tempc == 3:
+        elif tempc in [3, 4]:
             posTail[z][0] += 1
             posTail[z][1] += 1
-        elif (tempc == -1 or tempc == 1)  and tempb > 0:
+        elif (tempc in [-1, 0, 1])  and tempb > 0 and tempd != -1:
             posTail[z][0] += 1
             posTail[z][1] -= 1
-        elif tempc == -3:
+        elif tempc in [-4, -3]:
             posTail[z][0] -= 1
             posTail[z][1] -= 1
-    print(posTail[8])
+
+    # print(posTail[8])
     gridVisited[posTail[8][0]][posTail[8][1]] = '#'
 
-gridVisited =[['#']]
-posHead = [0, 0]
-posTail = []
-for z in range(9):
+    # drawGrid()
+
+for _ in range(9):
     posTail.append([0,0])
 
-with open('in.txt','r') as f:
+with open('input9.txt','r') as f:
     inp = f.read().splitlines(keepends=False)
 
 direction = []