4 files changed, 23 insertions, 23 deletions
diff --git a/data/mods/enemy-fort/map.lua b/data/mods/enemy-fort/map.lua
deleted file mode 100644
index 443b74b..0000000
--- a/data/mods/enemy-fort/map.lua
+++ /dev/null
@@ -1,3 +0,0 @@
--- The enemy fort's reactor (team 1). Sits inside the fort (columns x=25..29).
--- Destroy it to win.
-table.insert(MapDevices, { type = "reactor", x = 27, y = 3.0, team = 1 })
diff --git a/data/mods/enemy-fort/maps.lua b/data/mods/enemy-fort/maps.lua
new file mode 100644
index 0000000..4f748ae
--- /dev/null
+++ b/data/mods/enemy-fort/maps.lua
@@ -0,0 +1,21 @@
+-- Layered-modding demo: this runs AFTER data/maps.lua, so it can reach into a
+-- map the base game defined and change it. Here we bolt an extra armour skin
+-- onto the Proving Ground enemy fort, making it a tougher target.
+--
+-- A mod could equally `table.insert(Maps, { ... })` to ship a whole new map;
+-- see data/maps.lua for the shape of an entry.
+
+local m = FindMap("Proving Ground")
+if m then
+    table.insert(m.structures, {
+        name = "enemy outer plating",
+        beams = {
+            -- a second armoured skin one unit in front of the fort's face,
+            -- tied back to it so the whole thing stays triangulated
+            {24,1,24,3,"armour"}, {24,3,24,5,"armour"},
+            {24,1,25,1,"wood"}, {24,3,25,3,"wood"}, {24,5,25,5,"wood"},
+            {24,1,25,3,"wood"}, {24,3,25,5,"wood"},
+        },
+    })
+    m.description = m.description .. " (+ enemy-fort mod plating)"
+end
diff --git a/data/mods/enemy-fort/mod.lua b/data/mods/enemy-fort/mod.lua
index b2bc990..01a6b42 100644
--- a/data/mods/enemy-fort/mod.lua
+++ b/data/mods/enemy-fort/mod.lua
@@ -1,4 +1,5 @@
--- Scenario mod: a prebuilt enemy fort on the right for the player to shoot at.
+-- Scenario mod: reinforces the Proving Ground enemy fort with extra armour
+-- plating. Doubles as the worked example of layered map modding (maps.lua).
 Selectable = true
 Priority   = 5
 Category   = "Scenario"
diff --git a/data/mods/enemy-fort/structures.lua b/data/mods/enemy-fort/structures.lua
deleted file mode 100644
index ce6bdd0..0000000
--- a/data/mods/enemy-fort/structures.lua
+++ /dev/null
@@ -1,19 +0,0 @@
--- A triangulated wooden fort on the right side (columns at x=25,27,29; rows at
--- y=1,3,5). Foundations sit on the ground (y=1). All beams <= 3 units so they
--- obey the material length limits. Shoot it apart with the cannon.
-table.insert(Structures, {
-    name = "enemy fort",
-    beams = {
-        -- verticals
-        {25,1,25,3,"wood"}, {25,3,25,5,"wood"},
-        {27,1,27,3,"wood"}, {27,3,27,5,"wood"},
-        {29,1,29,3,"wood"}, {29,3,29,5,"wood"},
-        -- horizontals
-        {25,1,27,1,"wood"}, {27,1,29,1,"wood"},
-        {25,3,27,3,"wood"}, {27,3,29,3,"wood"},
-        {25,5,27,5,"wood"}, {27,5,29,5,"wood"},
-        -- diagonals (triangulation, so it's rigid)
-        {25,1,27,3,"wood"}, {27,1,29,3,"wood"},
-        {25,3,27,5,"wood"}, {27,3,29,5,"wood"},
-    },
-})