From 1899b27b791734a6b72e28cfb1420536c6035ee4 Mon Sep 17 00:00:00 2001
From: troido <troido@protonmail.com>
Date: Thu, 21 May 2020 15:26:12 +0200
Subject: added exchanger as seperate component/system; refactored other
 interactions; parameter parsing returns result instead of option

---
 src/resources/ground.rs | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

(limited to 'src/resources')

diff --git a/src/resources/ground.rs b/src/resources/ground.rs
index 7411a15..7868be9 100644
--- a/src/resources/ground.rs
+++ b/src/resources/ground.rs
@@ -9,7 +9,8 @@ use specs::{
 
 use crate::{
 	components::{Visible, Flags, Flag},
-	Pos
+	Pos,
+	controls::Direction
 };
 
 #[derive(Default)]
@@ -43,6 +44,19 @@ impl Ground {
 			.collect()
 	}
 	
+	pub fn components_near<'a, C: Component>(&self, pos: Pos, directions: &[Direction], component_type: &'a ReadStorage<C>) -> Vec<(Entity, &'a C)> {
+		let mut nearby_components: Vec<(Entity, &'a C)> = Vec::new();
+		for direction in directions {
+			let pos = pos + direction.to_position();
+			for ent in self.cells.get(&pos).unwrap_or(&HashSet::new()) {
+				if let Some(comp) = component_type.get(*ent) {
+					nearby_components.push((*ent, comp));
+				}
+			}
+		}
+		nearby_components
+	}
+	
 	pub fn by_height(&self, pos: &Pos, visibles: &ReadStorage<Visible>, ignore: &Entity) -> Vec<Entity> {
 		let mut entities: Vec<Entity> = self.cells
 			.get(&pos).unwrap_or(&HashSet::new())
-- 
cgit