finishes decoupling map from camera

src/camera.rs

@@ -3,7 +3,7 @@ use rltk::{Point, Rltk, RGB};
 use specs::prelude::*;
 use std::ops::{Add, Mul};
 
-const SHOW_BOUNDARIES: bool = true;
+const SHOW_BOUNDARIES: bool = false;
 
 pub fn get_screen_bounds(ecs: &World, ctx: &mut Rltk) -> (i32, i32, i32, i32) {
     let player_pos = ecs.fetch::<Point>();
@@ -277,3 +277,37 @@ fn wall_glyph(map: &Map, x: i32, y: i32) -> rltk::FontCharType {
         _ => 35,    // We missed one?
     }
 }
+
+pub fn render_debug_map(map: &Map, ctx: &mut Rltk) {
+    let player_pos = Point::new(map.width / 2, map.height / 2);
+    let (x_chars, y_chars) = ctx.get_char_size();
+
+    let center_x = (x_chars / 2) as i32;
+    let center_y = (y_chars / 2) as i32;
+
+    let min_x = player_pos.x - center_x;
+    let max_x = min_x + x_chars as i32;
+    let min_y = player_pos.y - center_y;
+    let max_y = min_y + y_chars as i32;
+
+    let map_width = map.width - 1;
+    let map_height = map.height - 1;
+
+    let mut y = 0;
+    for ty in min_y..max_y {
+        let mut x = 0;
+        for tx in min_x..max_x {
+            if tx > 0 && tx < map_width && ty > 0 && ty < map_height {
+                let idx = map.xy_idx(tx, ty);
+                if map.revealed_tiles[idx] {
+                    let (glyph, fg, bg) = get_tile_glyph(idx, &*map);
+                    ctx.set(x, y, fg, bg, glyph);
+                }
+            } else if SHOW_BOUNDARIES {
+                ctx.set(x, y, RGB::named(rltk::GRAY), RGB::named(rltk::BLACK), rltk::to_cp437('·'));
+            }
+            x += 1;
+        }
+        y += 1;
+    }
+}