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, 47 insertions, 0 deletions

diff --git a/data/weapons.lua b/data/weapons.lua
new file mode 100644
index 0000000..8fd2a6b
--- /dev/null
+++ b/data/weapons.lua
@@ -0,0 +1,47 @@
+-- Weapon definitions (values scaled from Forts' data to our world units).
+-- Build modes / firing read the global `Weapons` array; mods may FindWeapon().
+
+Weapons =
+{
+    {
+        name = "cannon",              -- ballistic artillery (arcs under gravity)
+        muzzle_speed = 38,            -- launch speed (units/s); Forts MuzzleSpeed 6000 cm/s
+        reload = 2.0,                 -- seconds between shots
+        splash_damage = 200,          -- Forts StructureSplashDamage 200
+        splash_radius = 3.0,          -- Forts 150 cm ~= 3 units
+        knockback = 55,               -- Forts KickbackMean 40 (impulse)
+        projectile_radius = 0.18,
+        fire_chance = 0.25,           -- Forts cannon is incendiary (~25%)
+        min_fire_angle = -20,         -- firing arc (degrees, rel. to mount) — Forts MinFireAngle
+        max_fire_angle = 30,          -- Forts MaxFireAngle
+        energy_cost = 120,            -- energy per shot (Forts EnergyFireCost)
+        texture = "data/textures/weapon_turret.png",
+        projectile_texture = "data/textures/projectile_laser.png",
+    },
+    {
+        name = "laser",               -- line-of-sight beam; ignites what it hits
+        is_beam = true,
+        reload = 3.0,                 -- seconds between beams (Forts ReloadTime)
+        beam_range = 70,              -- max beam length (units)
+        beam_dps = 90,                -- HP/s to the struck strut
+        beam_duration = 1.5,          -- Forts BeamDuration 1.5
+        fire_chance = 1.0,            -- laser ALWAYS ignites (its whole point)
+        min_fire_angle = -20,         -- Forts laser MinFireAngle -20
+        max_fire_angle = 45,          -- Forts laser MaxFireAngle 45
+        energy_cost = 200,            -- beam is energy-hungry
+        texture = "data/textures/weapon_turret.png",
+    },
+}
+
+function IndexOfWeapon(name)
+    for i, w in ipairs(Weapons) do
+        if w.name == name then return i end
+    end
+    return nil
+end
+
+function FindWeapon(name)
+    local i = IndexOfWeapon(name)
+    if i then return Weapons[i] end
+    return nil
+end