Added map gen

src/main.rs

@@ -1,7 +1,7 @@
 use rltk::{GameState, Rltk, VirtualConsole, VirtualKeyCode, RGB};
 use specs::prelude::*;
 use specs_derive::Component;
-use std::{cmp::{max, min}, sync::TryLockResult};
+use std::cmp::{max, min};
 
 struct State {
     ecs: World,
@@ -13,6 +13,9 @@ impl GameState for State {
         // self.run_systems();
         player_input(self, ctx);
 
+        let map = self.ecs.fetch::<Vec<TileType>>();
+        draw_map(&map, ctx);
+
         let positions = self.ecs.read_storage::<Position>();
         let renderables = self.ecs.read_storage::<Renderable>();
 
@@ -41,10 +44,14 @@ struct Renderable {
 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() {
-        pos.x = min(79, max(0, pos.x + delta_x));
+        let destination_idx = xy_idx(pos.x + delta_x, pos.y + delta_y);
-        pos.y = min(49, max(0, 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));
+        }
     }
 }
 
@@ -63,7 +70,8 @@ fn player_input(gs: &mut State, ctx: &mut Rltk) {
 
 #[derive(PartialEq, Copy, Clone)]
 enum TileType {
-    Wall, Floor
+    Wall,
+    Floor,
 }
 
 pub fn xy_idx(x: i32, y: i32) -> usize {
@@ -71,7 +79,7 @@ pub fn xy_idx(x: i32, y: i32) -> usize {
 }
 
 fn new_map() -> Vec<TileType> {
-    let mut map = vec![TileType::Floor; 80*50];
+    let mut map = vec![TileType::Floor; 80 * 50];
 
     for x in 0..80 {
         map[xy_idx(x, 0)] = TileType::Wall;
@@ -96,6 +104,39 @@ fn new_map() -> Vec<TileType> {
     map
 }
 
+fn draw_map(map: &[TileType], ctx: &mut Rltk) {
+    let mut y = 0;
+    let mut x = 0;
+    for tile in map.iter() {
+        match tile {
+            TileType::Floor => {
+                ctx.set(
+                    x,
+                    y,
+                    RGB::from_f32(0.5, 0.5, 0.5),
+                    RGB::from_f32(0., 0., 0.),
+                    rltk::to_cp437('.'),
+                );
+            }
+            TileType::Wall => {
+                ctx.set(
+                    x,
+                    y,
+                    RGB::from_f32(0.0, 1.0, 0.0),
+                    RGB::from_f32(0., 0., 0.),
+                    rltk::to_cp437('#'),
+                );
+            }
+        }
+
+        x += 1;
+        if x > 79 {
+            x = 0;
+            y += 1;
+        }
+    }
+}
+
 fn main() -> rltk::BError {
     use rltk::RltkBuilder;
     let context = RltkBuilder::simple80x50()
@@ -109,7 +150,7 @@ fn main() -> rltk::BError {
 
     gs.ecs
         .create_entity()
-        .with(Position { x: 40, y: 35 })
+        .with(Position { x: 40, y: 25 })
         .with(Renderable {
             glyph: rltk::to_cp437('@'),
             fg: RGB::named(rltk::YELLOW),