feat(ecs): add relationships

1 files changed, 16 insertions, 1 deletions

diff --git a/ecs/src/component.rs b/ecs/src/component.rs
index 67ae453..057b5ff 100644
--- a/ecs/src/component.rs
+++ b/ecs/src/component.rs
@@ -6,7 +6,7 @@ use seq_macro::seq;
 use crate::lock::WriteGuard;
 use crate::system::{ComponentRefMut, Input as SystemInput};
 use crate::type_name::TypeName;
-use crate::EntityComponent;
+use crate::{EntityComponent, WorldData};
 
 pub mod local;
 
@@ -36,6 +36,12 @@ pub trait Component: SystemInput + Any + TypeName
     {
         false
     }
+
+    fn prepare(_world_data: &WorldData)
+    where
+        Self: Sized,
+    {
+    }
 }
 
 impl dyn Component
@@ -144,6 +150,8 @@ pub trait Sequence
     fn from_components<'component>(
         components: impl Iterator<Item = &'component EntityComponent>,
     ) -> Self::Refs<'component>;
+
+    fn prepare(_world_data: &WorldData);
 }
 
 /// [`Component`] metadata.
@@ -254,6 +262,13 @@ macro_rules! inner {
                         Comp~I::RefMut::from_optional_component(comp_~I),
                     )*)
                 }
+
+                fn prepare(world_data: &WorldData)
+                {
+                    #(
+                        Comp~I::prepare(world_data);
+                    )*
+                }
             }
         });
     };