day13 (can p2 be solved without simulating the full game?)

day12.py

@@ -32,9 +32,9 @@ def moveMoons(moons: List[Moon]):
             if i == t:
                 continue
 
-            moon.vel_x += compare(moon.x, moons[t].x)
-            moon.vel_y += compare(moon.y, moons[t].y)
-            moon.vel_z += compare(moon.z, moons[t].z)
+            moon.vel_x += compare(moons[t].x, moon.x)
+            moon.vel_y += compare(moons[t].y, moon.y)
+            moon.vel_z += compare(moons[t].z, moon.z)
 
     for moon in moons:
         moon.x += moon.vel_x

day13.py

@@ -0,0 +1,49 @@
+import time
+
+from aoc import AOCDay
+from intcode import IntCode
+from tools import compare
+from typing import Any
+
+
+class Day(AOCDay):
+    test_solutions_p1 = []
+    test_solutions_p2 = []
+
+    def part1(self) -> Any:
+        comp = IntCode(self.getInputAsArraySplit(",", int))
+        comp.run()
+
+        blocks = 0
+        while comp.hasOutput():
+            blocks += comp.getOutput(3)[2] == 2
+
+        return blocks
+
+    def part2(self) -> Any:
+        comp = IntCode(self.getInputAsArraySplit(",", int))
+        comp.memory[0] = 2
+        comp.start()
+
+        score = 0
+        while comp.isRunning():
+            paddle = []
+            ball_x = 0
+            paddle_x = 0
+            time.sleep(0.005)  # let the comp build it's output
+            while comp.hasOutput():
+                x = comp.getOutput()
+                tile = comp.getOutput(2)[1]
+
+                if x == -1:
+                    score = tile
+                elif tile == 4:
+                    ball_x = x
+                elif tile == 3:
+                    paddle.append(x)
+
+            if len(paddle) > 0:
+                paddle_x = sum(paddle) // len(paddle)
+            comp.addInput(compare(ball_x, paddle_x))
+
+        return score

intcode.py

@@ -58,6 +58,9 @@ class IntCode(threading.Thread):
     def addInput(self, value: int):
         self.input_queue.put(value)
 
+    def hasOutput(self):
+        return self.output_queue.qsize() > 0
+
     def getOutput(self, count: int = 1, block: bool = True, timeout: int = None) -> Union[int, List[int]]:
         if count == 1:
             res = self.output_queue.get(block=block, timeout=timeout)