7 files changed, 63 insertions, 14 deletions
diff --git a/src/systems/droploot.rs b/src/systems/droploot.rs
index 616d38d..1b8f824 100644
--- a/src/systems/droploot.rs
+++ b/src/systems/droploot.rs
@@ -3,7 +3,6 @@ use rand::Rng;
 
 use specs::{
 	ReadStorage,
-	WriteStorage,
 	System,
 	Join,
 	Write
@@ -22,7 +21,7 @@ use crate::{
 pub struct DropLoot;
 impl <'a> System<'a> for DropLoot{
 	type SystemData = (
-		WriteStorage<'a, Position>,
+		ReadStorage<'a, Position>,
 		Write<'a, NewEntities>,
 		ReadStorage<'a, Dead>,
 		ReadStorage<'a, Loot>
diff --git a/src/systems/growth.rs b/src/systems/growth.rs
new file mode 100644
index 0000000..7472115
--- /dev/null
+++ b/src/systems/growth.rs
@@ -0,0 +1,48 @@
+
+use rand;
+
+use specs::{
+	ReadStorage,
+	WriteStorage,
+	Entities,
+	System,
+	Join,
+	Write,
+	Read
+};
+
+use crate::{
+	components::{
+		Position,
+		Grow,
+		Removed
+	},
+	resources::{NewEntities, Time}
+};
+
+
+pub struct Growth;
+impl <'a> System<'a> for Growth{
+	type SystemData = (
+		Entities<'a>,
+		ReadStorage<'a, Position>,
+		Write<'a, NewEntities>,
+		WriteStorage<'a, Grow>,
+		WriteStorage<'a, Removed>,
+		Read<'a, Time>
+	);
+	
+	fn run(&mut self, (entities, positions, mut new, mut grows, mut removeds, time): Self::SystemData) {
+		for (entity, position, grow) in (&entities, &positions, &mut grows).join(){
+			if grow.target_time == None {
+				let duration = grow.delay as f64 * (1.0 + rand::random::<f64>()) / (if rand::random() {1.0} else {2.0});
+				grow.target_time = Some(time.time + duration as i64);
+			}
+			if grow.target_time.unwrap() <= time.time {
+				removeds.insert(entity, Removed).unwrap();
+				// todo: error handling
+				new.create(position.pos, grow.into.clone()).unwrap();
+			}
+		}
+	}
+}
diff --git a/src/systems/heal.rs b/src/systems/heal.rs
index 458bc17..34e67f4 100644
--- a/src/systems/heal.rs
+++ b/src/systems/heal.rs
@@ -8,7 +8,7 @@ use specs::{
 
 use crate::{
 	components::{Health, Healing},
-	resources::TimeStamp
+	resources::Time
 };
 
 
@@ -17,19 +17,19 @@ impl <'a> System<'a> for Heal {
 	type SystemData = (
 		WriteStorage<'a, Health>,
 		WriteStorage<'a, Healing>,
-		Read<'a, TimeStamp>
+		Read<'a, Time>
 	);
-	fn run(&mut self, (mut healths, mut healing, timestamp): Self::SystemData) {
+	fn run(&mut self, (mut healths, mut healing, time): Self::SystemData) {
 		for (health, mut heal) in (&mut healths, &mut healing).join() {
 			
 			if let Some(next_heal) = heal.next_heal {
-				if next_heal <= timestamp.time {
+				if next_heal <= time.time {
 					health.heal(heal.health);
 					heal.next_heal = None
 				}
 			}
 			if health.health < health.maxhealth && heal.next_heal == None {
-				heal.next_heal = Some(timestamp.time + heal.delay)
+				heal.next_heal = Some(time.time + heal.delay)
 			}
 		}
 	}
diff --git a/src/systems/mod.rs b/src/systems/mod.rs
index 1735df9..318d5ee 100644
--- a/src/systems/mod.rs
+++ b/src/systems/mod.rs
@@ -19,6 +19,7 @@ mod die;
 mod spawn;
 mod interact;
 mod droploot;
+mod growth;
 
 pub use self::{
 	controlinput::ControlInput,
@@ -40,5 +41,6 @@ pub use self::{
 	die::Die,
 	spawn::Spawn,
 	interact::Interact,
-	droploot::DropLoot
+	droploot::DropLoot,
+	growth::Growth
 };
diff --git a/src/systems/spawn.rs b/src/systems/spawn.rs
index 27dcb1f..33dbc95 100644
--- a/src/systems/spawn.rs
+++ b/src/systems/spawn.rs
@@ -17,7 +17,7 @@ use crate::{
 		Clan,
 		Home
 	},
-	resources::{NewEntities, TimeStamp},
+	resources::{NewEntities, Time},
 	componentwrapper::ComponentWrapper
 };
 
@@ -30,7 +30,7 @@ impl <'a> System<'a> for Spawn {
 		Write<'a, NewEntities>,
 		WriteStorage<'a, Spawner>,
 		ReadStorage<'a, Clan>,
-		Read<'a, TimeStamp>
+		Read<'a, Time>
 	);
 	
 	fn run(&mut self, (positions, mut new, mut spawners, clans, time): Self::SystemData) {
diff --git a/src/systems/useitem.rs b/src/systems/useitem.rs
index ab147b7..89a301c 100644
--- a/src/systems/useitem.rs
+++ b/src/systems/useitem.rs
@@ -29,7 +29,7 @@ impl <'a> System<'a> for Use {
 	type SystemData = (
 		Entities<'a>,
 		ReadStorage<'a, Controller>,
-		WriteStorage<'a, Position>,
+		ReadStorage<'a, Position>,
 		WriteStorage<'a, Inventory>,
 		Write<'a, NewEntities>,
 		WriteStorage<'a, AttackInbox>
@@ -42,7 +42,7 @@ impl <'a> System<'a> for Use {
 					if let Some(item) = inventory.items.get(*rank) {
 						match &item.action {
 							Build(template) => {
-								let _ = new.create(position.pos, template.clone());
+								new.create(position.pos, template.clone()).unwrap();
 								inventory.items.remove(*rank);
 							}
 							Eat(health_diff) => {
diff --git a/src/systems/volate.rs b/src/systems/volate.rs
index 8cfa826..cd50995 100644
--- a/src/systems/volate.rs
+++ b/src/systems/volate.rs
@@ -9,7 +9,7 @@ use specs::{
 
 use crate::{
 	components::{Volatile, Removed},
-	resources::TimeStamp
+	resources::Time
 };
 
 pub struct Volate;
@@ -18,7 +18,7 @@ impl <'a> System<'a> for Volate {
 		Entities<'a>,
 		WriteStorage<'a, Volatile>,
 		WriteStorage<'a, Removed>,
-		Read<'a, TimeStamp>
+		Read<'a, Time>
 	);
 	fn run(&mut self, (entities, mut volatiles, mut removals, timestamp): Self::SystemData) {
 		for (ent, volatile) in (&entities, &mut volatiles).join() {