Now with resize

src/player.rs

@@ -0,0 +1,35 @@
+use crate::{
+    components::{Player, Position},
+    map::{xy_idx, TileType},
+    State,
+};
+use rltk::Rltk;
+use specs::prelude::*;
+use std::cmp::{max, min};
+
+pub fn try_move_player(delta_x: i32, delta_y: i32, ecs: &mut World) {
+    let mut positions = ecs.write_storage::<Position>();
+    let mut players = ecs.write_storage::<Player>();
+    let map = ecs.fetch::<Vec<TileType>>();
+
+    for (_player, pos) in (&mut players, &mut positions).join() {
+        let destination_idx = xy_idx(pos.x + delta_x, pos.y + delta_y);
+        if map[destination_idx] != TileType::Wall {
+            pos.x = min(79, max(0, pos.x + delta_x));
+            pos.y = min(49, max(0, pos.y + delta_y));
+        }
+    }
+}
+
+pub fn player_input(gs: &mut State, ctx: &mut Rltk) {
+    match ctx.key {
+        None => {}
+        Some(key) => match key {
+            rltk::VirtualKeyCode::Left => try_move_player(-1, 0, &mut gs.ecs),
+            rltk::VirtualKeyCode::Right => try_move_player(1, 0, &mut gs.ecs),
+            rltk::VirtualKeyCode::Up => try_move_player(0, -1, &mut gs.ecs),
+            rltk::VirtualKeyCode::Down => try_move_player(0, 1, &mut gs.ecs),
+            _ => {}
+        },
+    }
+}