A quick little random movement for enemies to work out collision.

main.go

@@ -18,7 +18,7 @@ const (
   SPACE = '.'
   PATH_LIMIT = 1000
   RENDER = true
-  SHOW_RENDER = true
+  SHOW_RENDER = false
 )
 
 type Position struct {
@@ -91,11 +91,13 @@ func (game *Game) Exit() {
 func (game *Game) Occupied(x int, y int) bool {
   pos := Position{x, y}
   _, is_enemy := game.enemies[pos]
+  is_player := pos == game.player
 
   // Inbounds comes first to prevent accessing level with bad x,y
   return !game.Inbounds(pos, 1) ||
       game.level[y][x] == WALL ||
-      is_enemy
+      is_enemy ||
+      is_player
 }
 
 func (game *Game) MovePlayer(x_delta int, y_delta int) {
@@ -291,6 +293,24 @@ func (game *Game) CarveRoom(pos Position, size int) {
   }
 }
 
+func (game *Game) MoveEnemy(from Position, to Position) {
+  enemy, ok := game.enemies[from]
+  if !ok { log.Fatal("no enemy at", from, "wtf") }
+
+  delete(game.enemies, from)
+  game.enemies[to] = enemy
+}
+
+func (game *Game) PathEnemies() {
+  for pos, _ := range game.enemies {
+    possible := compass(pos.x, pos.y, 1)
+    move_to := possible[rand.Int() % len(possible)]
+    if !game.Occupied(move_to.x, move_to.y) {
+      game.MoveEnemy(pos, move_to)
+    }
+  }
+}
+
 func (game *Game) AddRooms(dead_ends []Position, size int) {
   rand.Shuffle(len(dead_ends), func(i, j int) {
     dead_ends[i], dead_ends[j] = dead_ends[j], dead_ends[i]
@@ -304,16 +324,16 @@ func (game *Game) AddRooms(dead_ends []Position, size int) {
 
 func (game *Game) MakeMap() []Position {
   game.ClearMap()
-  dead_ends := game.HuntAndKill()
   game.Status("FIRST MAZE")
+  dead_ends := game.HuntAndKill()
 
   game.ClearMap()
   game.AddRooms(dead_ends, game.height / 8)
-  game.Status("SECOND MAZE")
 
+  game.Status("SECOND MAZE")
   dead_ends = game.HuntAndKill()
-  game.Status("FINISHED")
 
+  game.Status("FINISHED")
   return dead_ends
 }
 
@@ -336,6 +356,7 @@ func main() {
   game.Render()
 
   for game.HandleEvents() {
+    game.PathEnemies()
     game.Render()
   }