1 files changed, 63 insertions, 0 deletions
diff --git a/src/systems.rs b/src/systems.rs
new file mode 100644
index 0000000..322ad23
--- /dev/null
+++ b/src/systems.rs
@@ -0,0 +1,63 @@
+
+use specs::{
+	ReadStorage,
+	WriteStorage,
+	Write,
+	System,
+	Join
+};
+
+use super::components::{
+	Position,
+	Visible,
+	Controller
+};
+
+use super::controls::Control;
+
+use super::resources::TopView;
+
+pub struct Draw;
+
+impl <'a> System<'a> for Draw {
+	
+	type SystemData = (ReadStorage<'a, Position>, ReadStorage<'a, Visible>, Write<'a, TopView>);
+	
+	fn run(&mut self, (pos, vis, mut view): Self::SystemData) {
+		view.cells.clear();
+		for (pos, vis) in (&pos, &vis).join(){
+			if pos.x >= 0 && pos.y >= 0 && pos.x < view.width && pos.y < view.height {
+				view.cells.entry(*pos).or_insert(Vec::new()).push(vis.clone());
+				view.cells.get_mut(pos).unwrap().sort_by(|a, b| b.height.partial_cmp(&a.height).unwrap());
+			}
+		}
+	}
+}
+
+// struct Control;
+// impl <'a> System <'a> for Control {
+// 	type SystemData = WriteStorage<'a, Controller>;
+// 	fn run (&mut self, mut controller: Self::SystemData) {
+// 		for controller in &mut controller.join()
+// 	}
+// }
+
+pub struct Move;
+impl <'a> System<'a> for Move {
+	type SystemData = (WriteStorage<'a, Controller>, WriteStorage<'a, Position>);
+	fn run(&mut self, (mut controller, mut pos): Self::SystemData) {
+		for (controller, pos) in (&mut controller, &mut pos).join(){
+			if let Some(control) = &controller.0 {
+				match control {
+					Control::Move(direction) => {
+						let (dx, dy) = direction.to_position();
+						pos.x += dx;
+						pos.y += dy;
+					}
+					_ => {}
+				}
+				controller.0 = None
+			}
+		}
+	}
+}