add entity 'on_render' event

src/logic/scripting/scripting.cpp

@@ -422,6 +422,13 @@ void scripting::on_entities_update() {
     lua::pop(L);
 }
 
+void scripting::on_entities_render() {
+    auto L = lua::get_main_thread();
+    lua::get_from(L, STDCOMP, "render", true);
+    lua::call_nothrow(L, 0, 0);
+    lua::pop(L);
+}
+
 void scripting::on_ui_open(
     UiDocument* layout,
     std::vector<dynamic::Value> args

src/logic/scripting/scripting.hpp

@@ -89,6 +89,7 @@ namespace scripting {
     bool on_entity_fall(const Entity& entity);
     bool on_entity_save(const Entity& entity);
     void on_entities_update();
+    void on_entities_render();
     void on_trigger_enter(const Entity& entity, size_t index, entityid_t oid);
     void on_trigger_exit(const Entity& entity, size_t index, entityid_t oid);