grid

lib/include/intcode/Grid.hpp

@@ -0,0 +1,27 @@
+#ifndef INTCODE_GRID_HPP_
+#define INTCODE_GRID_HPP_
+
+#include <ostream>
+#include <map>
+#include <tuple>
+
+#include <intcode/Machine.hpp>
+
+namespace intcode {
+
+using Coord = std::pair<ValueType, ValueType>;
+
+auto Draw(std::ostream & out, std::map<Coord, ValueType> image) -> void;
+
+auto Up(Coord) -> Coord;
+auto Down(Coord) -> Coord;
+auto Left(Coord) -> Coord;
+auto Right(Coord) -> Coord;
+auto CW(Coord) -> Coord;
+auto CCW(Coord) -> Coord;
+auto Add(Coord, Coord) -> Coord;
+
+
+} // namespace
+
+#endif

lib/src/Grid.cpp

@@ -0,0 +1,68 @@
+#include <intcode/Grid.hpp>
+
+namespace intcode {
+
+auto Draw(std::ostream & out, std::map<Coord, ValueType> image) -> void {
+  ValueType minX = 0, maxX = 0, minY = 0, maxY = 0;
+  for (auto&& [k, _] : image) {
+    auto [x,y] = k;
+    minX = std::min(minX, x);
+    maxX = std::max(maxX, x);
+    minY = std::min(minY, y);
+    maxY = std::max(maxY, y);
+  }
+  for (ValueType y = minY; y <= maxY; y++) {
+    for (ValueType x = minX; x <= maxX; x++) {
+      auto it = image.find({x,y});
+      if (image.end() == it) {
+        out << ".";
+      } else switch (it->second) {
+      case 0: out << "░"; break;
+      case 1: out << "▓"; break;
+      case 2: out << "2"; break;
+      case 3: out << "3"; break;
+      case 4: out << "4"; break;
+      default: out << "!"; break;
+      }
+    }
+    out << "\n";
+  }
+}
+
+auto Up(Coord c) -> Coord {
+  c.second -= 1;
+  return c;
+}
+
+auto Down(Coord c) -> Coord {
+  c.second += 1;
+  return c;
+}
+
+auto Left(Coord c) -> Coord {
+  c.first -= 1;
+  return c;
+}
+
+auto Right(Coord c) -> Coord {
+  c.first += 1;
+  return c;
+}
+
+auto CW(Coord c) -> Coord {
+  std::swap(c.first, c.second);
+  c.first = -c.first;
+  return c;
+}
+
+auto CCW(Coord c) -> Coord {
+  std::swap(c.first, c.second);
+  c.second = -c.second;
+  return c;
+}
+
+auto Add(Coord x, Coord y) -> Coord {
+  return {x.first + y.first, x.second + y.second};
+}
+
+} // namespace