Add basic map

src/map_builders/common.rs

@@ -0,0 +1,31 @@
+use std::cmp::{max, min};
+
+use crate::rect::Rect;
+use crate::{Map, TileType};
+
+pub fn apply_room_to_map(map: &mut Map, room: &Rect) {
+    for y in room.y1 + 1..=room.y2 {
+        for x in room.x1 + 1..=room.x2 {
+            let idx = map.xy_idx(x, y);
+            map.tiles[idx] = TileType::Floor;
+        }
+    }
+}
+
+pub fn apply_horizontal_tunnel(map: &mut Map, x1: i32, x2: i32, y: i32) {
+    for x in min(x1, x2)..=max(x1, x2) {
+        let idx = map.xy_idx(x, y);
+        if idx > 0 && idx < map.width as usize * map.height as usize {
+            map.tiles[idx as usize] = TileType::Floor;
+        }
+    }
+}
+
+pub fn apply_vertical_tunnel(map: &mut Map, y1: i32, y2: i32, x: i32) {
+    for y in min(y1, y2)..=max(y1, y2) {
+        let idx = map.xy_idx(x, y);
+        if idx > 0 && idx < map.width as usize * map.height as usize {
+            map.tiles[idx as usize] = TileType::Floor;
+        }
+    }
+}