From 793208128854631287ccf2c8f60bf477974c10fb Mon Sep 17 00:00:00 2001
From: Anthony Hayward <abh@ad.datcon.co.uk>
Date: Wed, 13 May 2020 08:58:54 +0100
Subject: [PATCH] Day 11 Python

---
 day11_robot/python/README.md             | 14 +++++
 day11_robot/python/day11_robot_part_1.py | 17 ++----
 day11_robot/python/day11_robot_part_2.py | 75 ++++++++++++++++++++++++
 3 files changed, 95 insertions(+), 11 deletions(-)
 create mode 100644 day11_robot/python/day11_robot_part_2.py

diff --git a/day11_robot/python/README.md b/day11_robot/python/README.md
index e69de29..bc7951c 100644
--- a/day11_robot/python/README.md
+++ b/day11_robot/python/README.md
@@ -0,0 +1,14 @@
+```
+python day11_robot_part_1.py
+# 1747
+
+
+python day11_robot_part_2.py
+
+  XXXXXXXX    XXXX      XXXX    XXXXXX    XX    XX  XX    XX  XX        XXXXXX
+        XX  XX    XX  XX    XX  XX    XX  XX    XX  XX  XX    XX        XX    XX
+      XX    XX        XX        XX    XX  XXXXXXXX  XXXX      XX        XXXXXX
+    XX      XX        XX  XXXX  XXXXXX    XX    XX  XX  XX    XX        XX    XX
+  XX        XX    XX  XX    XX  XX  XX    XX    XX  XX  XX    XX        XX    XX
+  XXXXXXXX    XXXX      XXXXXX  XX    XX  XX    XX  XX    XX  XXXXXXXX  XXXXXX
+```
\ No newline at end of file
diff --git a/day11_robot/python/day11_robot_part_1.py b/day11_robot/python/day11_robot_part_1.py
index 95ad29a..01d67c4 100644
--- a/day11_robot/python/day11_robot_part_1.py
+++ b/day11_robot/python/day11_robot_part_1.py
@@ -6,21 +6,16 @@
 
 class Robot:
     def __init__(self, init_mem):
-        self.computer = IntCodeComputer(init_mem, [0])
+        self.computer = IntCodeComputer(init_mem, [])
         self.pos = (0, 0)
         self.direction = (0, -1)
-        self.painted_panels = []
+        self.painted_panels = {}
     
     def get_panel_colour(self):
-        for (coords, colour) in self.painted_panels:
-            if coords == self.pos:
-                return colour
-        return 0 # black
+        return self.painted_panels.get(self.pos, 0) # painted colour or black if never painted
     
     def paint_panel(self, colour):
-        self.painted_panels = \
-            [(coords, colour) for (coords, colour) in self.painted_panels if coords != self.pos] + \
-            [(self.pos, colour)]
+        self.painted_panels[self.pos] = colour
 
     def run(self):
         self.computer.inputs = [self.get_panel_colour()]
@@ -33,10 +28,10 @@ def run(self):
             (xd, yd) = self.direction
             if new_direction == 0:
                 # turn left
-                self.direction = (-yd, xd)
+                self.direction = (yd, -xd)
             elif new_direction == 1:
                 # turn right
-                self.direction = (yd, -xd)
+                self.direction = (-yd, xd)
             else:
                 raise Exception("Unrecognised direction code")
             (x, y) = self.pos
diff --git a/day11_robot/python/day11_robot_part_2.py b/day11_robot/python/day11_robot_part_2.py
new file mode 100644
index 0000000..38e74c6
--- /dev/null
+++ b/day11_robot/python/day11_robot_part_2.py
@@ -0,0 +1,75 @@
+#!/bin/python
+
+import sys
+import io
+from computer import IntCodeComputer
+
+class Robot:
+    def __init__(self, init_mem):
+        self.computer = IntCodeComputer(init_mem, [])
+        self.pos = (0, 0)
+        self.direction = (0, -1)
+        self.painted_panels = {}
+        # initial panel is white
+        self.paint_panel(1)
+    
+    def get_panel_colour(self, position):
+        return self.painted_panels.get(position, 0) # painted colour or black if never painted
+    
+    def paint_panel(self, colour):
+        self.painted_panels[self.pos] = colour
+
+    def run(self):
+        self.computer.inputs = [self.get_panel_colour(self.pos)]
+        self.computer.run()
+        if self.computer.is_halted():
+            return False
+        else:
+            [new_colour, new_direction] = self.computer.outputs
+            self.paint_panel(new_colour)
+            (xd, yd) = self.direction
+            if new_direction == 0:
+                # turn left
+                self.direction = (yd, -xd)
+            elif new_direction == 1:
+                # turn right
+                self.direction = (-yd, xd)
+            else:
+                raise Exception("Unrecognised direction code")
+            (x, y) = self.pos
+            (xd, yd) = self.direction
+            self.pos = (x + xd, y + yd)
+            return True
+
+    def print_panel_paint_pattern(self):
+        (x_min, y_min, x_max, y_max) = (0, 0, 0, 0)
+        for (x, y) in self.painted_panels:
+            if x < x_min:
+                x_min = x
+            elif x > x_max:
+                x_max = x
+            if y < y_min:
+                y_min = y
+            elif y > y_max:
+                y_max = y
+        for y in range(y_min, y_max + 1):
+            l = ""
+            for x in range(x_min, x_max + 1):
+                l += "XX" if self.get_panel_colour((x, y)) else "  "
+            print(l)
+
+
+file_path = "../data/puzzle_input.csv"
+init_mem = []
+with io.open(file_path, "r") as f:
+    line = f.readline()
+    if line:
+        init_mem = [int(x.strip()) for x in line.split(",")]
+    else:
+        raise Exception("No program in file!")
+
+robot = Robot(init_mem)
+while robot.run():
+    pass
+
+robot.print_panel_paint_pattern()