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pub mod filter;
pub mod geometry;
pub mod map;
pub use map::{Map, Symmetry, TileType};
pub use filter::*;
pub (crate) mod dijkstra;
pub (crate) mod random;
use std::time::{SystemTime, UNIX_EPOCH};
use rand::prelude::*;
pub trait MapFilter {
fn modify_map(&self, rng: &mut StdRng, map: &Map) -> Map;
}
pub struct MapBuilder {
width: usize,
height: usize,
modifiers: Vec<Box<dyn MapFilter>>,
}
impl MapBuilder {
pub fn new(width: usize, height: usize) -> MapBuilder {
MapBuilder {
width,
height,
modifiers: Vec::new(),
}
}
pub fn with(&mut self, modifier : Box<dyn MapFilter>) -> &mut MapBuilder {
self.modifiers.push(modifier);
self
}
pub fn build(&mut self) -> Map {
let system_time = SystemTime::now().duration_since(UNIX_EPOCH).expect("Can't access system time");
let mut rng = StdRng::seed_from_u64(system_time.as_millis() as u64);
self.build_with_rng(&mut rng)
}
pub fn build_with_rng(&mut self, rng: &mut StdRng) -> Map {
let mut map = Map::new(self.width, self.height);
for modifier in self.modifiers.iter() {
map = modifier.modify_map(rng, &map);
}
map
}
}
#[cfg(test)]
mod tests {
use super::*;
use filter::{
CellularAutomata,
NoiseGenerator,
{AreaStartingPosition, XStart, YStart},
};
#[test]
fn test_ca_map() {
let map = MapBuilder::new(80, 50)
.with(NoiseGenerator::new(0.55))
.with(CellularAutomata::new())
.with(AreaStartingPosition::new(XStart::CENTER, YStart::CENTER))
.build();
assert_eq!(map.width, 80);
assert_eq!(map.height, 50);
assert_eq!(map.starting_point.is_some(), true);
}
}