add standard components test

res/content/base/scripts/drop.lua

@@ -7,5 +7,6 @@ function on_despawn(eid)
 end
 
 function on_grounded(eid)
-    Transform.set_rot(eid, mat4.rotate({0, 1, 0}, math.random()*360))
+    local entity = stdcomp.new_Entity(eid) -- test
+    entity.transform:set_rot(mat4.rotate({0, 1, 0}, math.random()*360))
 end

res/content/base/scripts/hud.lua

@@ -8,8 +8,8 @@ function on_hud_open()
         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, 
+        __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), 
             {1, 0, 0}, math.random() * 360), {0, 0, 1}, math.random() * 360))
     end)

res/modules/internal/stdcomp.lua

@@ -0,0 +1,35 @@
+-- Standard components OOP wrappers (__index tables of metatables)
+
+local Transform = {__index={
+    get_pos=function(self) return __transform.get_pos(self.eid) end,
+    set_pos=function(self, v) return __transform.set_pos(self.eid, v) end,
+    get_rot=function(self) return __transform.get_rot(self.eid) end,
+    set_rot=function(self, m) return __transform.set_rot(self.eid, m) end,
+}}
+
+function new_Transform(eid)
+    return setmetatable({eid=eid}, Transform)
+end
+
+local Rigidbody = {__index={
+    is_enabled=function(self) return __rigidbody.is_enabled(self.eid) end,
+    set_enabled=function(self, f) return __rigidbody.set_enabled(self.eid, f) end,
+    get_vel=function(self) return __rigidbody.get_vel(self.eid) end,
+    set_vel=function(self, v) return __rigidbody.set_vel(self.eid, v) end,
+    get_size=function(self) return __rigidbody.get_size(self.eid) end,
+}}
+
+function new_Rigidbody(eid)
+    return setmetatable({eid=eid}, Rigidbody)
+end
+
+-- Entity class
+
+local Entity = {__index={}}
+
+return {new_Entity = function(eid)
+    local entity = setmetatable({eid=eid}, Entity)
+    entity.transform = new_Transform(eid)
+    entity.rigidbody = new_Rigidbody(eid)
+    return entity
+end}

res/scripts/stdlib.lua

@@ -303,6 +303,8 @@ function file.readlines(path)
     return lines
 end
 
+stdcomp = require "core:internal/stdcomp"
+
 -- Deprecated functions
 block_index = block.index
 block_name = block.name

src/logic/scripting/lua/lua_engine.cpp

@@ -49,8 +49,8 @@ static void create_libs(lua::State* L) {
     openlib(L, "world", worldlib);
 
     // components
-    openlib(L, "Rigidbody", rigidbodylib);
-    openlib(L, "Transform", transformlib);
+    openlib(L, "__rigidbody", rigidbodylib);
+    openlib(L, "__transform", transformlib);
 
     addfunc(L, "print", lua::wrap<l_print>);
 }

src/logic/scripting/scripting.cpp

@@ -230,24 +230,21 @@ bool scripting::on_item_break_block(Player* player, const ItemDef* item, int x,
 bool scripting::on_entity_spawn(const EntityDef& def, entityid_t eid) {
     std::string name = def.name + ".spawn";
     return lua::emit_event(lua::get_main_thread(), name, [eid] (auto L) {
-        lua::pushinteger(L, eid);
-        return 1;
+        return lua::pushinteger(L, eid);
     });
 }
 
 bool scripting::on_entity_despawn(const EntityDef& def, entityid_t eid) {
     std::string name = def.name + ".despawn";
     return lua::emit_event(lua::get_main_thread(), name, [eid] (auto L) {
-        lua::pushinteger(L, eid);
-        return 1;
+        return lua::pushinteger(L, eid);
     });
 }
 
 bool scripting::on_entity_grounded(const EntityDef& def, entityid_t eid) {
     std::string name = def.name + ".grounded";
     return lua::emit_event(lua::get_main_thread(), name, [eid] (auto L) {
-        lua::pushinteger(L, eid);
-        return 1;
+        return lua::pushinteger(L, eid);
     });
 }