Try to add damage for ammo collisions

level_state.lua

@@ -6,6 +6,7 @@ require 'entities/chaingunpowerup'
 require 'entities/plane'
 require 'chaingunmode'
 require 'entities/plane'
+require 'machinegun'
 
 level_state = {}
 
@@ -147,6 +148,29 @@ function begin_contact(a, b, coll)
             if bObj:isinstance(Plane) and (aObj:getOwner() == nil or aObj:getOwner().id ~= bObj.id) then
                 bObj:receiveDamage(1000);
             end
+
+            local plane = nil
+            local other = nil
+            if aObj:isinstance(Plane) then
+                plane = aObj
+                other = bObj
+            elseif bObj:isinstance(Plane) then
+                plane = bObj
+                other = aObj
+            end
+
+            if plane then
+                if other:getOwner() == nil then
+                    -- Collision with ground or other plane
+                    plane:receiveDamage(1000)
+                elseif other:getOwner().id ~= plane.id then
+                    for key, gun in pairs(GUNS) do
+                        if other:isinstance(gun['projectile']) then
+                            plane:receiveDamage(gun['damage'])
+                        end
+                    end
+                end
+            end
         end
     end
 end

machinegun.lua

@@ -4,18 +4,19 @@ Class = require 'hump/class'
 require 'entities/vickers77'
 require 'entities/tinyshot'
 
-
 GUNS = {
     chaingun = {
         interval = 0.01,
         force = 150000,
-        projectile = TinyShot
+        projectile = TinyShot,
+        damage = 1
     },
 
     vickers77 = {
         interval = 0.1,
         force = 300000,
-        projectile = Vickers77
+        projectile = Vickers77,
+        damage = 10
     }
 }
 
@@ -41,6 +42,7 @@ MachineGun = Class{
     end;
 
     setType = function(self, type)
+        print(GUNS['vickers77'])
         self.gun = GUNS[type]
         self.since_last_shot = 0
     end;