Basic inventory system working and can pick up items but needs to be reflected in the UI next.

tests/matrix.cpp

@@ -252,6 +252,7 @@ TEST_CASE("prototype circle algorithm", "[matrix:circle]") {
     size_t height = Random::uniform<size_t>(10, 15);
     int pos_mod = Random::uniform<int>(-3,3);
     Map map(width,height);
+
     // create a target for the paths
     Point start{.x=map.width() / 2 + pos_mod, .y=map.height()/2 + pos_mod};
 
@@ -275,3 +276,31 @@ TEST_CASE("prototype circle algorithm", "[matrix:circle]") {
     }
   }
 }
+
+TEST_CASE("viewport iterator", "[matrix:viewport]") {
+  size_t width = Random::uniform<size_t>(20, 22);
+  size_t height = Random::uniform<size_t>(21, 25);
+  Map map(width,height);
+  WorldBuilder builder(map);
+  builder.generate();
+
+  size_t view_width = width/2;
+  size_t view_height = height/2;
+  Point player = map.place_entity(1);
+  Point start = map.center_camera(player, view_width, view_height);
+
+  size_t end_x = std::min(view_width, map.width() - start.x);
+  size_t end_y = std::min(view_height, map.height() - start.y);
+
+  matrix::viewport it{map.walls(), start, int(view_width), int(view_height)};
+
+  for(size_t y = 0; y < end_y; ++y) {
+    for(size_t x = 0; x < end_x && it.next(); ++x) {
+
+      println("view x/y={},{}; w/h={},{}; start={},{}",
+          it.x, it.y, it.width, it.height, it.start.x, it.start.y);
+      println("orig  x/y={},{}; w/h={},{}; start={},{}\n",
+          x+start.x, y+start.y, view_width, view_height, start.x, start.y);
+    }
+  }
+}