update entity.spawn(...): now returns an Entity instead of id

res/content/base/scripts/drop.lua

@@ -4,4 +4,5 @@ end
 
 function on_grounded()
     entity.transform:set_rot(mat4.rotate({0, 1, 0}, math.random()*360))
+    entity:despawn()
 end

res/content/base/scripts/hud.lua

@@ -6,11 +6,11 @@ function on_hud_open()
         local pid = hud.get_player()
         local pvel = {player.get_vel(pid)}
         local ppos = vec3.add({player.get_pos(pid)}, {0, 0.7, 0})
-        local eid = entity.spawn("base:drop", ppos)
         local throw_force = vec3.mul(player.get_dir(pid), DROP_FORCE)
-        __rigidbody.set_vel(eid, vec3.add(throw_force, vec3.add(pvel, DROP_INIT_VEL)))
-        __transform.set_rot(eid, 
-            mat4.rotate(mat4.rotate(mat4.rotate({0, 1, 0}, math.random() * 360), 
+
+        local drop = entity.spawn("base:drop", ppos)
+        drop.rigidbody:set_vel(vec3.add(throw_force, vec3.add(pvel, DROP_INIT_VEL)))
+        drop.transform:set_rot(mat4.rotate(mat4.rotate(mat4.rotate({0, 1, 0}, math.random() * 360), 
             {1, 0, 0}, math.random() * 360), {0, 0, 1}, math.random() * 360))
     end)
 end

src/logic/scripting/lua/libentity.cpp

@@ -31,8 +31,8 @@ static int l_spawn(lua::State* L) {
     auto defname = lua::tostring(L, 1);
     auto& def = content->entities.require(defname);
     auto pos = lua::tovec3(L, 2);
-    auto id = level->entities->spawn(def, pos);
-    return lua::pushinteger(L, id);
+    level->entities->spawn(def, pos);
+    return 1;
 }
 
 static int l_despawn(lua::State* L) {

src/logic/scripting/scripting.cpp

@@ -271,6 +271,7 @@ scriptenv scripting::on_entity_spawn(const EntityDef& def, entityid_t eid, entit
     lua::pushenv(L, *entityenv);
     funcsset.on_grounded = lua::hasfield(L, "on_grounded");
     funcsset.on_despawn = lua::hasfield(L, "on_despawn");
+    lua::pop(L, 2);
     return entityenv;
 }