only send changed cells, not the whole field each time

1 files changed, 9 insertions, 6 deletions

diff --git a/src/systems/moving.rs b/src/systems/moving.rs
index 38588d5..2ea0650 100644
--- a/src/systems/moving.rs
+++ b/src/systems/moving.rs
@@ -11,7 +11,8 @@ use super::super::pos::Pos;
 
 use super::super::components::{
 	Controller,
-	Blocking
+	Blocking,
+	Position
 };
 
 use super::super::controls::{
@@ -27,12 +28,12 @@ use super::super::resources::{
 
 pub struct Move;
 impl <'a> System<'a> for Move {
-	type SystemData = (ReadStorage<'a, Controller>, WriteStorage<'a, Pos>, Read<'a, Size>, ReadStorage<'a, Blocking>, Read<'a, Floor>);
-	fn run(&mut self, (controller, mut pos, size, blocking, floor): Self::SystemData) {
-		for (controller, pos) in (&controller, &mut pos).join(){
+	type SystemData = (ReadStorage<'a, Controller>, WriteStorage<'a, Position>, Read<'a, Size>, ReadStorage<'a, Blocking>, Read<'a, Floor>);
+	fn run(&mut self, (controllers, mut positions, size, blocking, floor): Self::SystemData) {
+		for (controller, mut pos) in (&controllers, &mut positions.restrict_mut()).join(){
 			match &controller.0 {
 				Control::Move(direction) => {
-					let newpos = (*pos + direction.to_position()).clamp(Pos::new(0, 0), Pos::new(size.width - 1, size.height - 1));
+					let newpos = (pos.get_unchecked().pos + direction.to_position()).clamp(Pos::new(0, 0), Pos::new(size.width - 1, size.height - 1));
 					let mut blocked = false;
 					for ent in floor.cells.get(&newpos).unwrap_or(&Vec::new()) {
 						if blocking.get(*ent).is_some(){
@@ -41,7 +42,9 @@ impl <'a> System<'a> for Move {
 						}
 					}
 					if !blocked {
-						pos.clone_from(&newpos);
+						let mut pos_mut = pos.get_mut_unchecked();
+						pos_mut.prev = Some(pos_mut.pos);
+						pos_mut.pos = newpos.clone();
 					}
 				}
 				_ => {}