rust-roguelike-tutorial/chapter-28-drunkards-walk/src/map_builders/common.rs

use super::{Map, Rect, TileType};
use std::cmp::{max, min};

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);
            if idx > 0 && idx < ((map.width * map.height)-1) as usize {
                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;
        }
    }
}