Initial import: LibreForts (M0-M5 in progress)

Open-source Forts clone: custom C++20 engine + data-driven (Lua) 2D physics
artillery RTS.

- Building: node/strut graph on a stiff mass-spring solver (canon Forts model),
  triangulation rigidity, axial + 30-degree angle-stress breaking, cascading
  collapse, fire (DoT + spread), ground destroys debris.
- Weapons (M4): cannon (ballistic) + laser (beam/ignite) with select-and-aim-in-
  arc UX; splash / beam damage; bg-brace passthrough.
- Devices + economy (M5): reactors + win/loss + restart, mines/turbines/battery,
  metal deposits, storage caps, per-shot energy cost.
- Data-driven via Lua/sol2 with a layered mod loader; enemy-fort scenario mod.
- Renderer: SDL3 + textures + ImGui dev UI. stb_image + ImGui vendored.
- Assets: CC0 placeholders only; real game art loaded at runtime from the user's
  own install via forts: paths (bring-your-own; nothing copyrighted committed).

See README.md / CLAUDE.md and research/ + requirements/ for detail.

1 files changed, 13 insertions, 0 deletions

diff --git a/data/map.lua b/data/map.lua
new file mode 100644
index 0000000..13f9c94
--- /dev/null
+++ b/data/map.lua
@@ -0,0 +1,13 @@
+-- Base scenario map: metal deposits and pre-placed devices. Mods append (the
+-- enemy-fort mod adds the enemy reactor). Coordinates are world units; y ~ 1 is
+-- the ground surface.
+Deposits   = Deposits   or {}
+MapDevices = MapDevices or {}
+
+-- Metal deposits (mines must sit on these). Player side (left) + enemy side (right).
+for _, x in ipairs({ -24, -11, 23, 31 }) do
+    table.insert(Deposits, { x, 1.0 })
+end
+
+-- Player reactor on the left.
+table.insert(MapDevices, { type = "reactor", x = -22, y = 2.0, team = 0 })