Initial conflict avoidance.

src/belt_finding/common.rs

@@ -7,7 +7,7 @@ pub enum Direction {
 }
 
 impl Direction {
-    pub fn from_neghbors(pos: &Position, neighbor: &Position) -> Self {
+    pub fn from_neighbors(pos: &Position, neighbor: &Position) -> Self {
         let x_diff = pos.x as i64 - neighbor.x as i64;
         let y_diff = pos.y as i64 - neighbor.y as i64;
 
@@ -143,4 +143,24 @@ impl PathField {
                 .map(|p| (p, *dir)),
         }
     }
+
+    pub fn offset(&self, offset: (i32, i32)) -> Self {
+        match self {
+            PathField::Belt { pos, dir } => PathField::Belt {
+                pos: Position::new(
+                    (pos.x as i32 + offset.0) as usize,
+                    (pos.y as i32 + offset.1) as usize,
+                ),
+                dir: *dir,
+            },
+            PathField::Underground { pos, dir, len } => PathField::Underground {
+                pos: Position::new(
+                    (pos.x as i32 + offset.0) as usize,
+                    (pos.y as i32 + offset.1) as usize,
+                ),
+                dir: *dir,
+                len: *len,
+            },
+        }
+    }
 }