Day 24, part two: Label the graph's edges with the wire names

Author: rhaendel

src/main/kotlin/de/ronny_h/aoc/year24/day24/PlotCrossedWires.ipynb

@@ -17,8 +17,8 @@
   {
    "metadata": {
     "ExecuteTime": {
-     "end_time": "2025-06-19T15:50:24.279065300Z",
-     "start_time": "2025-06-19T15:50:24.119250200Z"
+     "end_time": "2025-06-19T17:22:44.247196600Z",
+     "start_time": "2025-06-19T17:22:44.089978900Z"
     }
    },
    "cell_type": "code",
@@ -42,8 +42,8 @@
   {
    "metadata": {
     "ExecuteTime": {
-     "end_time": "2025-06-19T15:50:25.272229100Z",
-     "start_time": "2025-06-19T15:50:24.295155300Z"
+     "end_time": "2025-06-19T17:22:45.214580900Z",
+     "start_time": "2025-06-19T17:22:44.256858700Z"
     }
    },
    "cell_type": "code",
@@ -53,6 +53,8 @@
     "\n",
     "val gatesWithId = gates.mapIndexed { i, g -> GateWithId(\"$i\", g.in1, g.in2, g.operation.toString(), g.out) }\n",
     "val wiresWithId = wires.mapIndexed { i, w -> WireWithId(\"${i + gates.size}\", w.name) }\n",
+    "val gatesById = gatesWithId.associateBy { it.id }\n",
+    "val wiresById = wiresWithId.associateBy { it.id }\n",
     "val gatesOutLookup = gatesWithId.associateBy { it.out }\n",
     "val gatesInLookup = gatesWithId.fold(emptyMap<String, GateWithId>()) { acc, gate ->\n",
     "    (acc + (gate.in1 to gate)) + (gate.in2 to gate)\n",
@@ -74,8 +76,8 @@
   {
    "metadata": {
     "ExecuteTime": {
-     "end_time": "2025-06-19T15:50:25.779627800Z",
-     "start_time": "2025-06-19T15:50:25.282871300Z"
+     "end_time": "2025-06-19T17:22:45.565090Z",
+     "start_time": "2025-06-19T17:22:45.223580300Z"
     }
    },
    "cell_type": "code",
@@ -126,8 +128,8 @@
   {
    "metadata": {
     "ExecuteTime": {
-     "end_time": "2025-06-19T15:50:26.593631900Z",
-     "start_time": "2025-06-19T15:50:25.793419900Z"
+     "end_time": "2025-06-19T17:22:46.433761400Z",
+     "start_time": "2025-06-19T17:22:45.580090500Z"
     }
    },
    "cell_type": "code",
@@ -136,7 +138,7 @@
     "\n",
     "File(\"wiredGates.dot\").printWriter().use { out ->\n",
     "    out.println(\"digraph {\")\n",
-    "    out.println(\"  edge [arrowhead=vee arrowsize=0.6]\")\n",
+    "    out.println(\"  edge [fontname=Arial fontsize=9 arrowhead=vee arrowsize=0.6]\")\n",
     "    out.println(\"  node [fontname=Arial shape=plain]\")\n",
     "    val gatesCount = gatesWithId.size\n",
     "    val outWires = gatesWithId.filter { gatesInLookup[it.out] == null }.map { it.out }\n",
@@ -162,7 +164,23 @@
     "\n",
     "    wiredGateIds.first.forEachIndexed { i, fromId ->\n",
     "        val toId = wiredGateIds.second[i]\n",
-    "        out.println(\"  $fromId -> $toId\")\n",
+    "        val fromGate = gatesById[fromId]\n",
+    "        val attributes = if (fromGate != null) {\n",
+    "            if (fromGate.out.startsWith(\"z\")) {\n",
+    "                \" [color=$outZColor]\"\n",
+    "            } else {\n",
+    "                // the \"from\" and \"to\" nodes are gates -> label their connection\n",
+    "                \" [label=${fromGate.out}]\"\n",
+    "            }\n",
+    "        } else {\n",
+    "            // the \"from\" node is an input\n",
+    "            if (wiresById.getValue(fromId).name.startsWith(\"x\")) {\n",
+    "                \" [color=$inXColor]\"\n",
+    "            } else {\n",
+    "                \" [color=$inYColor]\"\n",
+    "            }\n",
+    "        }\n",
+    "        out.println(\"  $fromId -> $toId$attributes\")\n",
     "    }\n",
     "\n",
     "    out.println(\"}\")\n",
@@ -175,7 +193,13 @@
    "metadata": {},
    "cell_type": "markdown",
    "source": [
-    "The resulting graph looks like this:\n",
+    "The graph can be generated by calling\n",
+    "\n",
+    "```bash\n",
+    "dot wiredGates.dot -Tsvg -o wiredGates.svg\n",
+    "```\n",
+    "\n",
+    "It looks like this:\n",
     "\n",
     "![A Graph showing the wired gates with inputs and outputs](./wiredGates.svg)"
    ]