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ipynb/AdventUtils.ipynb

@@ -25,7 +25,7 @@
     "from itertools   import count as count_from, product as cross_product\n",
     "from typing      import *\n",
     "from statistics  import mean, median\n",
-    "from math        import ceil, floor, factorial, gcd, log, log2, log10, sqrt, inf\n",
+    "from math        import ceil, floor, factorial, gcd, log, log2, log10, sqrt, inf, atan2\n",
     "\n",
     "import matplotlib.pyplot as plt\n",
     "import ast\n",
@@ -488,6 +488,10 @@
     "    \"\"\"Specialized version of point addition for 2D Points only. Faster.\"\"\"\n",
     "    return (p[0] + q[0], p[1] + q[1])\n",
     "\n",
+    "def sub2(p: Point, q: Point) -> Point: \n",
+    "    \"\"\"Specialized version of point subtraction for 2D Points only. Faster.\"\"\"\n",
+    "    return (p[0] - q[0], p[1] - q[1])\n",
+    "\n",
     "def taxi_distance(p: Point, q: Point) -> int:\n",
     "    \"\"\"Manhattan (L1) distance between two 2D Points.\"\"\"\n",
     "    return abs(p[0] - q[0]) + abs(p[1] - q[1])"
@@ -552,6 +556,11 @@
     "        return (0 <= X_(point) < X_(self.size) and\n",
     "                0 <= Y_(point) < Y_(self.size))\n",
     "\n",
+    "    def follow_line(self, start: Point, direction: Vector) -> Iterable[Point]:\n",
+    "        while self.in_range(start):\n",
+    "            yield start\n",
+    "            start = add2(start, direction)\n",
+    "\n",
     "    def copy(self): \n",
     "        return Grid(self, directions=self.directions, skip=self.skip, default=self.default)\n",
     "    \n",
@@ -878,7 +887,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.8.15"
+   "version": "3.12.7"
   }
  },
  "nbformat": 4,