feat: add entity component system library

1 files changed, 32 insertions, 0 deletions

diff --git a/ecs/examples/simple.rs b/ecs/examples/simple.rs
new file mode 100644
index 0000000..b58d2ba
--- /dev/null
+++ b/ecs/examples/simple.rs
@@ -0,0 +1,32 @@
+use ecs::{Query, World};
+
+struct SomeData
+{
+    num: u64,
+}
+
+fn say_hello(mut query: Query<(SomeData, String)>)
+{
+    for (data, text) in query.iter_mut() {
+        println!("Hello {}: {}", text, data.num);
+    }
+}
+
+#[derive(Debug, PartialEq, Eq, Hash)]
+enum Event
+{
+    Start,
+}
+
+fn main()
+{
+    let mut world = World::<Event>::new();
+
+    world.register_system(Event::Start, say_hello);
+
+    world.create_entity((SomeData { num: 987_654 }, "Yoo".to_string()));
+
+    world.create_entity((SomeData { num: 345 }, "Haha".to_string()));
+
+    world.emit(&Event::Start);
+}