move particles to gfx.particles

res/content/base/scripts/world.lua

@@ -1,5 +1,5 @@
 function on_block_broken(id, x, y, z, playerid)
-    particles.emit({x+0.5, y+0.5, z+0.5}, 64, {
+    gfx.particles.emit({x+0.5, y+0.5, z+0.5}, 64, {
         lifetime=1.0,
         spawn_interval=0.0001,
         explosion={4, 4, 4},

src/logic/scripting/lua/lua_util.hpp

@@ -599,6 +599,23 @@ namespace lua {
         setglobal(L, name);
     }
 
+    inline void openlib(
+        lua::State* L,
+        const std::string& package,
+        const std::string& name,
+        const luaL_Reg* libfuncs
+    ) {
+        if (!hasglobal(L, package)) {
+            createtable(L, 0, 1);
+            setglobal(L, package);
+        }
+        getglobal(L, package);
+        createtable(L, 0, 0);
+        luaL_setfuncs(L, libfuncs, 0);
+        setfield(L, name);
+        pop(L);
+    }
+
     inline const char* require_string_field(
         lua::State* L, const std::string& name, int idx=-1
     ) {

src/logic/scripting/scripting_hud.cpp

@@ -24,7 +24,7 @@ void scripting::on_frontend_init(Hud* hud, WorldRenderer* renderer) {
     auto L = lua::get_main_state();
 
     lua::openlib(L, "hud", hudlib);
-    lua::openlib(L, "particles", particleslib);
+    lua::openlib(L, "gfx", "particles", particleslib);
 
     if (lua::getglobal(L, "__vc_create_hud_rules")) {
         lua::call_nothrow(L, 0, 0);