Add map blocking and diagonal movement

src/components.rs

@@ -32,3 +32,6 @@ pub struct Monster {}
 pub struct Name {
     pub name: String,
 }
+
+#[derive(Component)]
+pub struct BlocksTile {}

src/main.rs

@@ -8,12 +8,15 @@ pub use map::*;
 mod player;
 use player::*;
 mod rect;
+pub use rect::Rect;
 mod visibility_system;
 use visibility_system::VisibilitySystem;
 mod monster_ai_system;
 use monster_ai_system::*;
+mod map_indexing_system;
+use map_indexing_system::*;
 
-pub use rect::Rect;
+pub const MAP_SIZE: usize = 80 * 50;
 
 #[derive(PartialEq, Copy, Clone)]
 pub enum RunState {
@@ -34,6 +37,9 @@ impl State {
         let mut mob = MonsterAI {};
         mob.run_now(&self.ecs);
 
+        let mut mapindex = MapIndexingSystem {};
+        mapindex.run_now(&self.ecs);
+
         self.ecs.maintain();
     }
 }
@@ -82,6 +88,7 @@ fn main() -> rltk::BError {
     gs.ecs.register::<Viewshed>();
     gs.ecs.register::<Monster>();
     gs.ecs.register::<Name>();
+    gs.ecs.register::<BlocksTile>();
 
     let map: Map = Map::new_map_rooms_and_corridors();
     let (player_x, player_y) = map.rooms[0].center();
@@ -121,6 +128,7 @@ fn main() -> rltk::BError {
             .with(Name {
                 name: format!("{} #{}", &name, i),
             })
+            .with(BlocksTile {})
             .build();
     }
 

src/map.rs

@@ -1,4 +1,4 @@
-use super::Rect;
+use super::{Rect, MAP_SIZE};
 use rltk::{Algorithm2D, BaseMap, Point, RandomNumberGenerator, Rltk, SmallVec, RGB};
 use specs::prelude::*;
 use std::cmp::{max, min};
@@ -16,6 +16,7 @@ pub struct Map {
     pub height: i32,
     pub revealed_tiles: Vec<bool>,
     pub visible_tiles: Vec<bool>,
+    pub blocked: Vec<bool>,
 }
 
 impl Map {
@@ -56,12 +57,13 @@ impl Map {
     /// This gives a handful of random rooms and corridors joining them together
     pub fn new_map_rooms_and_corridors() -> Map {
         let mut map = Map {
-            tiles: vec![TileType::Wall; 80 * 50],
+            tiles: vec![TileType::Wall; MAP_SIZE],
             rooms: Vec::new(),
             width: 80,
             height: 50,
-            revealed_tiles: vec![false; 80 * 50],
-            visible_tiles: vec![false; 80 * 50],
+            revealed_tiles: vec![false; MAP_SIZE],
+            visible_tiles: vec![false; MAP_SIZE],
+            blocked: vec![false; MAP_SIZE],
         };
 
         const MAX_ROOMS: i32 = 30;
@@ -114,7 +116,14 @@ impl Map {
         }
 
         let idx = self.xy_idx(x, y);
-        self.tiles[idx as usize] != TileType::Wall
+
+        !self.blocked[idx]
+    }
+
+    pub fn populate_blocked(&mut self) {
+        for (i, tile) in self.tiles.iter_mut().enumerate() {
+            self.blocked[i] = *tile == TileType::Wall;
+        }
     }
 }
 
@@ -135,6 +144,7 @@ impl BaseMap for Map {
         let y = idx as i32 / self.width;
         let w = self.width as usize;
 
+        // Cardinal directions
         if self.is_exit_valid(x - 1, y) {
             exits.push((idx - 1, 1.0))
         };
@@ -148,6 +158,20 @@ impl BaseMap for Map {
             exits.push((idx + w, 1.0))
         };
 
+        // Diagonals
+        if self.is_exit_valid(x - 1, y - 1) {
+            exits.push(((idx - w) - 1, 1.45));
+        }
+        if self.is_exit_valid(x + 1, y - 1) {
+            exits.push(((idx - w) + 1, 1.45));
+        }
+        if self.is_exit_valid(x - 1, y + 1) {
+            exits.push(((idx + w) - 1, 1.45));
+        }
+        if self.is_exit_valid(x + 1, y + 1) {
+            exits.push(((idx + w) + 1, 1.45));
+        }
+
         exits
     }
 

src/map_indexing_system.rs

@@ -0,0 +1,22 @@
+use super::{BlocksTile, Map, Position};
+use specs::prelude::*;
+
+pub struct MapIndexingSystem {}
+
+impl<'a> System<'a> for MapIndexingSystem {
+    type SystemData = (
+        WriteExpect<'a, Map>,
+        ReadStorage<'a, Position>,
+        ReadStorage<'a, BlocksTile>,
+    );
+
+    fn run(&mut self, data: Self::SystemData) {
+        let (mut map, position, blockers) = data;
+
+        map.populate_blocked();
+        for (position, _blocks) in (&position, &blockers).join() {
+            let idx = map.xy_idx(position.x, position.y);
+            map.blocked[idx] = true;
+        }
+    }
+}

src/monster_ai_system.rs

@@ -21,9 +21,15 @@ impl<'a> System<'a> for MonsterAI {
         for (mut viewshed, _monster, name, mut pos) in
             (&mut viewshed, &monster, &name, &mut position).join()
         {
-            if viewshed.visible_tiles.contains(&*player_pos) {
+            let distance =
+                rltk::DistanceAlg::Pythagoras.distance2d(Point::new(pos.x, pos.y), *player_pos);
+            if distance < 1.5 {
+                // Attack goes here
                 console::log(&format!("{} shouts insults", name.name));
+                return;
+            }
 
+            if viewshed.visible_tiles.contains(&*player_pos) {
                 let path = rltk::a_star_search(
                     map.xy_idx(pos.x, pos.y) as i32,
                     map.xy_idx(player_pos.x, player_pos.y) as i32,

src/player.rs

@@ -12,7 +12,7 @@ pub fn try_move_player(delta_x: i32, delta_y: i32, ecs: &mut World) {
 
     for (_player, pos, viewshed) in (&mut players, &mut positions, &mut viewsheds).join() {
         let destination_idx = map.xy_idx(pos.x + delta_x, pos.y + delta_y);
-        if map.tiles[destination_idx] != TileType::Wall {
+        if !map.blocked[destination_idx] {
             pos.x = min(79, max(0, pos.x + delta_x));
             pos.y = min(49, max(0, pos.y + delta_y));
 
@@ -30,20 +30,39 @@ pub fn player_input(gs: &mut State, ctx: &mut Rltk) -> RunState {
     match ctx.key {
         None => return RunState::Paused, // Nothing happened
         Some(key) => match key {
-            VirtualKeyCode::Left | VirtualKeyCode::Numpad4 | VirtualKeyCode::H => {
-                try_move_player(-1, 0, &mut gs.ecs)
-            }
+            VirtualKeyCode::Left
+            | VirtualKeyCode::Numpad4
+            | VirtualKeyCode::H
+            | VirtualKeyCode::A => try_move_player(-1, 0, &mut gs.ecs),
 
-            VirtualKeyCode::Right | VirtualKeyCode::Numpad6 | VirtualKeyCode::L => {
-                try_move_player(1, 0, &mut gs.ecs)
-            }
+            VirtualKeyCode::Right
+            | VirtualKeyCode::Numpad6
+            | VirtualKeyCode::L
+            | VirtualKeyCode::D => try_move_player(1, 0, &mut gs.ecs),
 
-            VirtualKeyCode::Up | VirtualKeyCode::Numpad8 | VirtualKeyCode::K => {
-                try_move_player(0, -1, &mut gs.ecs)
-            }
+            VirtualKeyCode::Up
+            | VirtualKeyCode::Numpad8
+            | VirtualKeyCode::K
+            | VirtualKeyCode::W => try_move_player(0, -1, &mut gs.ecs),
 
-            VirtualKeyCode::Down | VirtualKeyCode::Numpad2 | VirtualKeyCode::J => {
-                try_move_player(0, 1, &mut gs.ecs)
+            VirtualKeyCode::Down
+            | VirtualKeyCode::Numpad2
+            | VirtualKeyCode::J
+            | VirtualKeyCode::S
+            | VirtualKeyCode::X => try_move_player(0, 1, &mut gs.ecs),
+
+            // Diagonals
+            VirtualKeyCode::Numpad9 | VirtualKeyCode::Y | VirtualKeyCode::E => {
+                try_move_player(1, -1, &mut gs.ecs)
+            }
+            VirtualKeyCode::Numpad7 | VirtualKeyCode::U | VirtualKeyCode::Q => {
+                try_move_player(-1, -1, &mut gs.ecs)
+            }
+            VirtualKeyCode::Numpad3 | VirtualKeyCode::N | VirtualKeyCode::C => {
+                try_move_player(1, 1, &mut gs.ecs)
+            }
+            VirtualKeyCode::Numpad1 | VirtualKeyCode::B | VirtualKeyCode::Z => {
+                try_move_player(-1, 1, &mut gs.ecs)
             }
 
             _ => return RunState::Paused,