Chapter 20

src/main.rs

@@ -59,6 +59,7 @@ pub enum RunState {
     NextLevel,
     ShowRemoveItem,
     GameOver,
+    MagicMapReveal { row: i32 },
 }
 
 pub struct State {
@@ -284,6 +285,10 @@ impl GameState for State {
             RunState::PlayerTurn => {
                 self.run_systems();
                 new_run_state = RunState::MonsterTurn;
+                match *self.ecs.fetch::<RunState>() {
+                    RunState::MagicMapReveal { .. } => { new_run_state = RunState::MagicMapReveal { row: 0 } }
+                    _ => { new_run_state = RunState::MonsterTurn; }
+                }
             }
             RunState::MonsterTurn => {
                 self.run_systems();
@@ -416,6 +421,20 @@ impl GameState for State {
                     }
                 }
             }
+            RunState::MagicMapReveal {
+                row
+            } => {
+                let mut map = self.ecs.fetch_mut::<Map>();
+                for x in 0..MAP_WIDTH {
+                    let idx = map.xy_idx(x as i32, row);
+                    map.revealed_tiles[idx] = true;
+                }
+                if row as usize == MAP_HEIGHT - 1 {
+                    new_run_state = RunState::MonsterTurn;
+                } else {
+                    new_run_state = RunState::MagicMapReveal {row: row + 1}
+                }
+            }
         }
 
         {
@@ -471,6 +490,7 @@ fn main() -> rltk::BError {
     gs.ecs.register::<HungerClock>();
     gs.ecs.register::<Heals>();
     gs.ecs.register::<ProvidesFood>();
+    gs.ecs.register::<MagicMapper>();
 
     gs.ecs.insert(SimpleMarkerAllocator::<SerializeMe>::new());