2018 Day 15 Completed!

2018/day15/tile.go

@@ -0,0 +1,34 @@
+package main
+
+type Tile struct {
+	Kind int
+	X, Y int
+	Map  Map
+	Unit *Unit
+}
+
+func (t Tile) WalkableNeighbors() []*Tile {
+	var neighbors []*Tile
+	for _, offset := range offsets {
+		if n := t.Map.Tile(t.X+offset.X, t.Y+offset.Y); n != nil && n.Kind == KindSpace {
+			neighbors = append(neighbors, n)
+		}
+	}
+	return neighbors
+}
+
+type SortableTiles []*Tile
+
+func (s SortableTiles) Len() int {
+	return len(s)
+}
+func (s SortableTiles) Less(i, j int) bool {
+	if s[i].Y == s[j].Y {
+		return s[i].X < s[j].X
+	}
+	return s[i].Y < s[j].Y
+}
+
+func (s SortableTiles) Swap(i, j int) {
+	s[i], s[j] = s[j], s[i]
+}