add entity:require_component

2025-09-06 22:29:55 +03:00
parent b406bc1ec4
commit 854dcf2a50
3 changed files with 11 additions and 0 deletions
@@ -63,6 +63,13 @@ local Entity = {__index={
    get_skeleton=function(self) return entities.get_skeleton(self.eid) end,
    set_skeleton=function(self, s) return entities.set_skeleton(self.eid, s) end,
    get_component=function(self, name) return self.components[name] end,
+    require_component=function(self, name)
+        local component = self.components[name]
+        if not component then
+            error(("entity has no required component '%s'"):format(name))
+        end
+        return component
+    end,
    has_component=function(self, name) return self.components[name] ~= nil end,
    get_uid=function(self) return self.eid end,
    def_index=function(self) return entities.get_def(self.eid) end,