[Add] Lua logic for traders.

dat/fleet.xml

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Fleets>
  <fleet name="Goddard Goddard">
-  <ai>militia</ai>
+  <ai>goddard</ai>
   <faction>Goddard</faction>
   <pilots>
    <pilot chance="100">Goddard</pilot>

scripts/ai/trader.lua

@@ -0,0 +1,30 @@
+include("../scripts/ai/merchant.lua")
+
+function sos()
+  msg = {
+    "Mayday! We are under attack!",
+    "Requesting assistance. We are under attack!",
+    "Merchant vessle here under attack! HELP!"
+  }
+  ai.broadcast(msg[rnd.int(1, #msg)])
+end
+
+function create()
+  ai.setcredits(rnd.int(100, ai.shipprice()/50))
+
+  -- Some stuff has more than others.
+  num = rnd.int(12)
+  if num < 5 then
+    cargo = "Food"
+  elseif num < 8 then
+    cargo = "Ore"
+  elseif num < 10 then
+    cargo = "Industrial Goods"
+  elseif num < 12 then
+    cargo = "Luxury Goods"
+  else
+    cargo = "Medicine"
+  end
+  ai.setcargo(cargo, rnd.int(0, ai.cargofree()))
+end
+

src/explosion.c

@@ -31,7 +31,7 @@ void expl_explode(double x, double y, double vx, double vy,
   /* Standard stuff. */
   exp_s = spfx_get("ExpS");
   exp_m = spfx_get("ExpM");
-  exp_s = spfx_get("ExpL");
+  exp_l = spfx_get("ExpL");
   layer = SPFX_LAYER_FRONT;
 
   /* Number of explosions. */