Edit edges

src/lib.rs

@@ -43,6 +43,11 @@ impl Board {
         }
     }
 
+    pub fn add_edge(&mut self, from: usize, to: usize) {
+	let node = self.nodes.get_mut(&from).expect("Could not find node");
+	node.edges.insert(to);
+    }
+
     pub fn nearest_node(&self, x: f32, y: f32) -> Option<usize> {
         let f = |n: &Node| dist_sq((n.x, n.y), (x, y));
         let mut iter = self.nodes.iter();