added day 5 part 2

day5_2.py

@@ -0,0 +1,96 @@
+#!/usr/bin/env python3
+import sys, utils
+
+class Map(object):
+    def __init__(self, x, y):
+        self.points = []
+        self._create_map(x, y)
+
+    def __str__(self):
+        s = f'maps size is {len(self.points)}x{len(self.points[0])}\n' 
+        for y in range(len(self.points[0])):
+            for x in range(len(self.points)):
+                s += str(self.points[x][y])
+            s += '\n'
+        return s
+
+    def _create_map(self, x, y):
+        self.points = [[0 for _ in range(y+1)] for _ in range(x+1)]
+
+    def _add_straight_line(self, x1, y1, x2, y2):
+        if x1 == x2:
+            y1, y2 = min(y1, y2), max(y1, y2)
+            self._add_vertical(y1, y2, x1)
+        elif y1 == y2:
+            x1, x2 = min(x1, x2), max(x1, x2)
+            self._add_horizontal(x1, x2, y1)
+
+    def _add_horizontal(self, x1, x2, y):
+        for i in range(x1, x2+1):
+            self.points[i][y] += 1
+
+    def _add_vertical(self, y1, y2, x):
+        for i in range(y1, y2+1):
+            self.points[x][i] += 1
+
+    def _add_diagonal(self, x1, y1, x2, y2):
+        if x1 > x2: # switch em' to start with smaller x
+            x1, y1, x2, y2 = x2, y2, x1, y1 
+        if y1 < y2:
+            self._add_top_to_bottom(x1, y1, x2, y2)
+        else:
+            self._add_bottom_to_top(x1, y1, x2, y2)
+
+    def _add_top_to_bottom(self, x1, y1, x2, y2):
+        x, y = x1, y1
+        while x <= x2 and y <= y2:
+            self.points[x][y] += 1
+            x += 1
+            y += 1
+
+    def _add_bottom_to_top(self, x1, y1, x2, y2):
+        x, y = x1, y1
+        while x <= x2 and y >= y2:
+            self.points[x][y] += 1
+            x += 1
+            y -= 1
+
+    def add_point(self, x, y):
+        self.points[x][y] = 8
+
+    def add_line(self, x1, y1, x2, y2):
+        if x1 == x2 or y1 == y2:
+            self._add_straight_line(x1, y1, x2, y2)
+        else:
+            self._add_diagonal(x1, y1, x2, y2)
+
+    def calculate_points(self, treshold) -> int:
+        total = 0
+        for row in self.points:
+            for point in row:
+                if point >= treshold:
+                    total += 1
+        return total
+
+def find_max_coords(coords):
+    x, y = 0, 0
+    for group in coords:
+        x = max(x, group[0], group[2])
+        y = max(y, group[1], group[3])
+    return x, y
+
+if __name__ == '__main__':
+    if len(sys.argv) < 2:
+        print("please supply input file")
+        sys.exit()
+
+    coords = utils.File(sys.argv[1]).get_coords()
+    x, y = find_max_coords(coords)
+    m = Map(x, y)
+    for x1, y1, x2, y2 in coords:
+        m.add_line(x1, y1, x2, y2)
+    # print(m)
+    print(m.calculate_points(2))
+
+
+