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980 lines
32 KiB
Rust
980 lines
32 KiB
Rust
#![allow(dead_code)]
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mod econ;
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use crate::{
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sim::WorldSim,
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site::{Dungeon, Settlement, Site as WorldSite},
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util::{attempt, seed_expan, CARDINALS, NEIGHBORS},
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};
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use common::{
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astar::Astar,
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path::Path,
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spiral::Spiral2d,
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store::{Id, Store},
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terrain::TerrainChunkSize,
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vol::RectVolSize,
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};
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use hashbrown::{HashMap, HashSet};
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use rand::prelude::*;
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use rand_chacha::ChaChaRng;
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use std::{fmt, hash::Hash, ops::Range};
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use vek::*;
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const INITIAL_CIV_COUNT: usize = 32;
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#[derive(Default)]
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pub struct Civs {
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civs: Store<Civ>,
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places: Store<Place>,
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tracks: Store<Track>,
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track_map: HashMap<Id<Site>, HashMap<Id<Site>, Id<Track>>>,
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sites: Store<Site>,
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}
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pub struct GenCtx<'a, R: Rng> {
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sim: &'a mut WorldSim,
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rng: R,
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}
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impl<'a, R: Rng> GenCtx<'a, R> {
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pub fn reseed(&mut self) -> GenCtx<'_, impl Rng> {
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GenCtx {
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sim: self.sim,
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rng: ChaChaRng::from_seed(self.rng.gen()),
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}
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}
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}
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impl Civs {
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pub fn generate(seed: u32, sim: &mut WorldSim) -> Self {
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let mut this = Self::default();
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let rng = ChaChaRng::from_seed(seed_expan::rng_state(seed));
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let mut ctx = GenCtx { sim, rng };
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for _ in 0..INITIAL_CIV_COUNT {
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log::info!("Creating civilisation...");
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if this.birth_civ(&mut ctx.reseed()).is_none() {
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log::warn!("Failed to find starting site for civilisation.");
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}
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}
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for _ in 0..32 {
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attempt(5, || {
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let loc = find_site_loc(&mut ctx, None)?;
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this.establish_site(&mut ctx.reseed(), loc, |place| Site {
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kind: SiteKind::Dungeon,
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center: loc,
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place,
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population: 0.0,
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stocks: Stocks::from_default(100.0),
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surplus: Stocks::from_default(0.0),
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values: Stocks::from_default(None),
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labors: MapVec::from_default(0.01),
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yields: MapVec::from_default(1.0),
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productivity: MapVec::from_default(1.0),
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last_exports: Stocks::from_default(0.0),
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export_targets: Stocks::from_default(0.0),
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trade_states: Stocks::default(),
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coin: 1000.0,
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})
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});
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}
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// Tick
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const SIM_YEARS: usize = 1000;
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for _ in 0..SIM_YEARS {
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this.tick(&mut ctx, 1.0);
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}
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// Flatten ground around sites
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for site in this.sites.iter() {
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if let SiteKind::Settlement = &site.kind {
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} else {
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continue;
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}
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let radius = 48i32;
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let wpos = site.center * Vec2::from(TerrainChunkSize::RECT_SIZE).map(|e: u32| e as i32);
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// Flatten ground
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let flatten_radius = 10.0;
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if let Some(center_alt) = ctx.sim.get_alt_approx(wpos) {
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for offs in Spiral2d::new().take(radius.pow(2) as usize) {
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let center_alt = center_alt
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+ if offs.magnitude_squared() <= 6i32.pow(2) {
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16.0
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} else {
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0.0
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}; // Raise the town centre up a little
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let pos = site.center + offs;
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let factor = (1.0
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- (site.center - pos).map(|e| e as f32).magnitude() / flatten_radius)
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* 1.15;
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ctx.sim
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.get_mut(pos)
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// Don't disrupt chunks that are near water
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.filter(|chunk| !chunk.river.near_water())
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.map(|chunk| {
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let diff = Lerp::lerp_precise(chunk.alt, center_alt, factor) - chunk.alt;
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chunk.alt += diff;
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chunk.basement += diff;
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chunk.rockiness = 0.0;
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chunk.warp_factor = 0.0;
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});
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}
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}
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}
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// Place sites in world
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for site in this.sites.iter() {
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let wpos = site
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.center
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.map2(Vec2::from(TerrainChunkSize::RECT_SIZE), |e, sz: u32| {
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e * sz as i32 + sz as i32 / 2
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});
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let world_site = match &site.kind {
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SiteKind::Settlement => {
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WorldSite::from(Settlement::generate(wpos, Some(ctx.sim), &mut ctx.rng))
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},
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SiteKind::Dungeon => {
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WorldSite::from(Dungeon::generate(wpos, Some(ctx.sim), &mut ctx.rng))
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},
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};
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let radius_chunks =
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(world_site.radius() / TerrainChunkSize::RECT_SIZE.x as f32).ceil() as usize;
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for pos in Spiral2d::new()
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.map(|offs| site.center + offs)
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.take((radius_chunks * 2).pow(2))
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{
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ctx.sim
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.get_mut(pos)
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.map(|chunk| chunk.sites.push(world_site.clone()));
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}
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log::info!("Placed site at {:?}", site.center);
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}
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//this.display_info();
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this
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}
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pub fn place(&self, id: Id<Place>) -> &Place { self.places.get(id) }
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pub fn sites(&self) -> impl Iterator<Item = &Site> + '_ { self.sites.iter() }
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#[allow(dead_code)]
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fn display_info(&self) {
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for (id, civ) in self.civs.iter_ids() {
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println!("# Civilisation {:?}", id);
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println!("Name: {}", "<unnamed>");
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println!("Homeland: {:#?}", self.places.get(civ.homeland));
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}
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for (id, site) in self.sites.iter_ids() {
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println!("# Site {:?}", id);
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println!("{:#?}", site);
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}
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}
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/// Return the direct track between two places
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fn track_between(&self, a: Id<Site>, b: Id<Site>) -> Option<Id<Track>> {
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self.track_map
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.get(&a)
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.and_then(|dests| dests.get(&b))
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.or_else(|| self.track_map.get(&b).and_then(|dests| dests.get(&a)))
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.copied()
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}
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/// Return an iterator over a site's neighbors
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fn neighbors(&self, site: Id<Site>) -> impl Iterator<Item = Id<Site>> + '_ {
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let to = self
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.track_map
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.get(&site)
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.map(|dests| dests.keys())
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.into_iter()
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.flatten();
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let fro = self
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.track_map
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.iter()
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.filter(move |(_, dests)| dests.contains_key(&site))
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.map(|(p, _)| p);
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to.chain(fro).filter(move |p| **p != site).copied()
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}
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/// Find the cheapest route between two places
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fn route_between(&self, a: Id<Site>, b: Id<Site>) -> Option<(Path<Id<Site>>, f32)> {
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let heuristic = move |p: &Id<Site>| {
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(self
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.sites
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.get(*p)
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.center
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.distance_squared(self.sites.get(b).center) as f32)
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.sqrt()
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};
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let neighbors = |p: &Id<Site>| self.neighbors(*p);
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let transition =
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|a: &Id<Site>, b: &Id<Site>| self.tracks.get(self.track_between(*a, *b).unwrap()).cost;
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let satisfied = |p: &Id<Site>| *p == b;
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let mut astar = Astar::new(100, a, heuristic);
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astar
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.poll(100, heuristic, neighbors, transition, satisfied)
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.into_path()
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.and_then(|path| astar.get_cheapest_cost().map(|cost| (path, cost)))
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}
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fn birth_civ(&mut self, ctx: &mut GenCtx<impl Rng>) -> Option<Id<Civ>> {
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let site = attempt(5, || {
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let loc = find_site_loc(ctx, None)?;
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self.establish_site(ctx, loc, |place| Site {
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kind: SiteKind::Settlement,
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center: loc,
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place,
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population: 24.0,
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stocks: Stocks::from_default(100.0),
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surplus: Stocks::from_default(0.0),
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values: Stocks::from_default(None),
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labors: MapVec::from_default(0.01),
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yields: MapVec::from_default(1.0),
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productivity: MapVec::from_default(1.0),
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last_exports: Stocks::from_default(0.0),
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export_targets: Stocks::from_default(0.0),
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trade_states: Stocks::default(),
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coin: 1000.0,
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})
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})?;
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let civ = self.civs.insert(Civ {
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capital: site,
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homeland: self.sites.get(site).place,
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});
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Some(civ)
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}
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fn establish_place(
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&mut self,
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ctx: &mut GenCtx<impl Rng>,
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loc: Vec2<i32>,
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area: Range<usize>,
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) -> Option<Id<Place>> {
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let mut dead = HashSet::new();
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let mut alive = HashSet::new();
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alive.insert(loc);
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// Fill the surrounding area
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while let Some(cloc) = alive.iter().choose(&mut ctx.rng).copied() {
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for dir in CARDINALS.iter() {
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if site_in_dir(&ctx.sim, cloc, *dir) {
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let rloc = cloc + *dir;
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if !dead.contains(&rloc)
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&& ctx
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.sim
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.get(rloc)
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.map(|c| c.place.is_none())
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.unwrap_or(false)
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{
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alive.insert(rloc);
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}
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}
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}
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alive.remove(&cloc);
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dead.insert(cloc);
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if dead.len() + alive.len() >= area.end {
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break;
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}
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}
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// Make sure the place is large enough
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if dead.len() + alive.len() <= area.start {
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return None;
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}
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let place = self.places.insert(Place {
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center: loc,
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nat_res: NaturalResources::default(),
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});
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// Write place to map
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for cell in dead.union(&alive) {
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if let Some(chunk) = ctx.sim.get_mut(*cell) {
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chunk.place = Some(place);
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self.places.get_mut(place).nat_res.include_chunk(ctx, *cell);
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}
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}
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Some(place)
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}
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fn establish_site(
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&mut self,
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ctx: &mut GenCtx<impl Rng>,
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loc: Vec2<i32>,
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site_fn: impl FnOnce(Id<Place>) -> Site,
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) -> Option<Id<Site>> {
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const SITE_AREA: Range<usize> = 64..256;
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let place = match ctx.sim.get(loc).and_then(|site| site.place) {
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Some(place) => place,
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None => self.establish_place(ctx, loc, SITE_AREA)?,
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};
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let site = self.sites.insert(site_fn(place));
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// Find neighbors
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const MAX_NEIGHBOR_DISTANCE: f32 = 250.0;
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let mut nearby = self
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.sites
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.iter_ids()
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.map(|(id, p)| (id, (p.center.distance_squared(loc) as f32).sqrt()))
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.filter(|(_, dist)| *dist < MAX_NEIGHBOR_DISTANCE)
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.collect::<Vec<_>>();
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nearby.sort_by_key(|(_, dist)| *dist as i32);
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for (nearby, _) in nearby.into_iter().take(5) {
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// Find a novel path
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if let Some((path, cost)) = find_path(ctx, loc, self.sites.get(nearby).center) {
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// Find a path using existing paths
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if self
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.route_between(site, nearby)
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// If the novel path isn't efficient compared to existing routes, don't use it
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.filter(|(_, route_cost)| *route_cost < cost * 3.0)
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.is_none()
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{
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// Write the track to the world as a path
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for locs in path.nodes().windows(3) {
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let to_prev_idx = NEIGHBORS
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.iter()
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.enumerate()
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.find(|(_, dir)| **dir == locs[0] - locs[1])
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.expect("Track locations must be neighbors")
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.0;
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let to_next_idx = NEIGHBORS
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.iter()
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.enumerate()
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.find(|(_, dir)| **dir == locs[2] - locs[1])
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.expect("Track locations must be neighbors")
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.0;
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let mut chunk = ctx.sim.get_mut(locs[1]).unwrap();
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chunk.path.neighbors |= (1 << (to_prev_idx as u8)) | (1 << (to_next_idx as u8));
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chunk.path.offset = Vec2::new(
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ctx.rng.gen_range(-16.0, 16.0),
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ctx.rng.gen_range(-16.0, 16.0),
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);
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}
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// Take note of the track
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let track = self.tracks.insert(Track { cost, path });
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self.track_map
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.entry(site)
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.or_default()
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.insert(nearby, track);
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}
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}
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}
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Some(site)
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}
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fn tick(&mut self, _ctx: &mut GenCtx<impl Rng>, years: f32) {
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for site in self.sites.iter_mut() {
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site.simulate(years, &self.places.get(site.place).nat_res);
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}
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// Trade stocks
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// let mut stocks = TRADE_STOCKS;
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// stocks.shuffle(ctx.rng); // Give each stock a chance to be traded
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// first for stock in stocks.iter().copied() {
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// let mut sell_orders = self.sites
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// .iter_ids()
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// .map(|(id, site)| (id, {
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// econ::SellOrder {
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// quantity:
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// site.export_targets[stock].max(0.0).min(site.stocks[stock]),
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// price:
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// site.trade_states[stock].sell_belief.choose_price(ctx) * 1.25, //
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// Trade cost q_sold: 0.0,
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// }
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// }))
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// .filter(|(_, order)| order.quantity > 0.0)
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// .collect::<Vec<_>>();
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// let mut sites = self.sites
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// .ids()
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// .collect::<Vec<_>>();
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// sites.shuffle(ctx.rng); // Give all sites a chance to buy first
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// for site in sites {
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// let (max_spend, max_price, max_import) = {
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// let site = self.sites.get(site);
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// let budget = site.coin * 0.5;
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// let total_value = site.values.iter().map(|(_, v)|
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// (*v).unwrap_or(0.0)).sum::<f32>(); (
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// 100000.0,//(site.values[stock].unwrap_or(0.1) /
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// total_value * budget).min(budget),
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// site.trade_states[stock].buy_belief.price,
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// -site.export_targets[stock].min(0.0), )
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// };
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// let (quantity, spent) = econ::buy_units(ctx, sell_orders
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// .iter_mut()
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// .filter(|(id, _)| site != *id && self.track_between(site,
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// *id).is_some()) .map(|(_, order)| order),
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// max_import,
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// 1000000.0, // Max price TODO
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// max_spend,
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// );
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// let mut site = self.sites.get_mut(site);
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// site.coin -= spent;
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// if quantity > 0.0 {
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// site.stocks[stock] += quantity;
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// site.last_exports[stock] = -quantity;
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// site.trade_states[stock].buy_belief.update_buyer(years,
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// spent / quantity); println!("Belief: {:?}",
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// site.trade_states[stock].buy_belief); }
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// }
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// for (site, order) in sell_orders {
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// let mut site = self.sites.get_mut(site);
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// site.coin += order.q_sold * order.price;
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// if order.q_sold > 0.0 {
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// site.stocks[stock] -= order.q_sold;
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// site.last_exports[stock] = order.q_sold;
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//
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// site.trade_states[stock].sell_belief.update_seller(order.q_sold /
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// order.quantity); }
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// }
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// }
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}
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}
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/// Attempt to find a path between two locations
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fn find_path(
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ctx: &mut GenCtx<impl Rng>,
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a: Vec2<i32>,
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b: Vec2<i32>,
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) -> Option<(Path<Vec2<i32>>, f32)> {
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let sim = &ctx.sim;
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let heuristic = move |l: &Vec2<i32>| (l.distance_squared(b) as f32).sqrt();
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let neighbors = |l: &Vec2<i32>| {
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let l = *l;
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NEIGHBORS
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.iter()
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.filter(move |dir| walk_in_dir(sim, l, **dir).is_some())
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.map(move |dir| l + *dir)
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};
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let transition =
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|a: &Vec2<i32>, b: &Vec2<i32>| 1.0 + walk_in_dir(sim, *a, *b - *a).unwrap_or(10000.0);
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let satisfied = |l: &Vec2<i32>| *l == b;
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let mut astar = Astar::new(20000, a, heuristic);
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astar
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.poll(20000, heuristic, neighbors, transition, satisfied)
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.into_path()
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.and_then(|path| astar.get_cheapest_cost().map(|cost| (path, cost)))
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}
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/// Return Some if travel between a location and a chunk next to it is permitted
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/// If permitted, the approximate relative const of traversal is given
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// (TODO: by whom?)
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fn walk_in_dir(sim: &WorldSim, a: Vec2<i32>, dir: Vec2<i32>) -> Option<f32> {
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if loc_suitable_for_walking(sim, a) && loc_suitable_for_walking(sim, a + dir) {
|
|
let a_chunk = sim.get(a)?;
|
|
let b_chunk = sim.get(a + dir)?;
|
|
|
|
let hill_cost = ((b_chunk.alt - a_chunk.alt).abs() / 2.5).powf(2.0);
|
|
let water_cost = if b_chunk.river.near_water() {
|
|
50.0
|
|
} else {
|
|
0.0
|
|
};
|
|
let wild_cost = if b_chunk.path.is_path() {
|
|
0.0 // Traversing existing paths has no additional cost!
|
|
} else {
|
|
2.0
|
|
};
|
|
Some(1.0 + hill_cost + water_cost + wild_cost)
|
|
} else {
|
|
None
|
|
}
|
|
}
|
|
|
|
/// Return true if a position is suitable for walking on
|
|
fn loc_suitable_for_walking(sim: &WorldSim, loc: Vec2<i32>) -> bool {
|
|
if let Some(chunk) = sim.get(loc) {
|
|
!chunk.river.is_ocean() && !chunk.river.is_lake()
|
|
} else {
|
|
false
|
|
}
|
|
}
|
|
|
|
/// Return true if a site could be constructed between a location and a chunk
|
|
/// next to it is permitted (TODO: by whom?)
|
|
fn site_in_dir(sim: &WorldSim, a: Vec2<i32>, dir: Vec2<i32>) -> bool {
|
|
loc_suitable_for_site(sim, a) && loc_suitable_for_site(sim, a + dir)
|
|
}
|
|
|
|
/// Return true if a position is suitable for site construction (TODO:
|
|
/// criteria?)
|
|
fn loc_suitable_for_site(sim: &WorldSim, loc: Vec2<i32>) -> bool {
|
|
if let Some(chunk) = sim.get(loc) {
|
|
!chunk.river.is_ocean()
|
|
&& !chunk.river.is_lake()
|
|
&& sim
|
|
.get_gradient_approx(loc)
|
|
.map(|grad| grad < 1.0)
|
|
.unwrap_or(false)
|
|
} else {
|
|
false
|
|
}
|
|
}
|
|
|
|
/// Attempt to search for a location that's suitable for site construction
|
|
fn find_site_loc(ctx: &mut GenCtx<impl Rng>, near: Option<(Vec2<i32>, f32)>) -> Option<Vec2<i32>> {
|
|
const MAX_ATTEMPTS: usize = 100;
|
|
let mut loc = None;
|
|
for _ in 0..MAX_ATTEMPTS {
|
|
let test_loc = loc.unwrap_or_else(|| match near {
|
|
Some((origin, dist)) => {
|
|
origin
|
|
+ (Vec2::new(ctx.rng.gen_range(-1.0, 1.0), ctx.rng.gen_range(-1.0, 1.0))
|
|
.try_normalized()
|
|
.unwrap_or(Vec2::zero())
|
|
* ctx.rng.gen::<f32>()
|
|
* dist)
|
|
.map(|e| e as i32)
|
|
},
|
|
None => Vec2::new(
|
|
ctx.rng.gen_range(0, ctx.sim.get_size().x as i32),
|
|
ctx.rng.gen_range(0, ctx.sim.get_size().y as i32),
|
|
),
|
|
});
|
|
|
|
if loc_suitable_for_site(&ctx.sim, test_loc) {
|
|
return Some(test_loc);
|
|
}
|
|
|
|
loc = ctx.sim.get(test_loc).and_then(|c| {
|
|
Some(
|
|
c.downhill?
|
|
.map2(Vec2::from(TerrainChunkSize::RECT_SIZE), |e, sz: u32| {
|
|
e / (sz as i32)
|
|
}),
|
|
)
|
|
});
|
|
}
|
|
None
|
|
}
|
|
|
|
#[derive(Debug)]
|
|
pub struct Civ {
|
|
capital: Id<Site>,
|
|
homeland: Id<Place>,
|
|
}
|
|
|
|
#[derive(Debug)]
|
|
pub struct Place {
|
|
center: Vec2<i32>,
|
|
nat_res: NaturalResources,
|
|
}
|
|
|
|
// Productive capacity per year
|
|
#[derive(Default, Debug)]
|
|
pub struct NaturalResources {
|
|
wood: f32,
|
|
rock: f32,
|
|
river: f32,
|
|
farmland: f32,
|
|
}
|
|
|
|
impl NaturalResources {
|
|
fn include_chunk(&mut self, ctx: &mut GenCtx<impl Rng>, loc: Vec2<i32>) {
|
|
let chunk = if let Some(chunk) = ctx.sim.get(loc) {
|
|
chunk
|
|
} else {
|
|
return;
|
|
};
|
|
|
|
self.wood += chunk.tree_density;
|
|
self.rock += chunk.rockiness;
|
|
self.river += if chunk.river.is_river() { 5.0 } else { 0.0 };
|
|
self.farmland += if chunk.humidity > 0.35
|
|
&& chunk.temp > -0.3
|
|
&& chunk.temp < 0.75
|
|
&& chunk.chaos < 0.5
|
|
&& ctx
|
|
.sim
|
|
.get_gradient_approx(loc)
|
|
.map(|grad| grad < 0.7)
|
|
.unwrap_or(false)
|
|
{
|
|
1.0
|
|
} else {
|
|
0.0
|
|
};
|
|
}
|
|
}
|
|
|
|
pub struct Track {
|
|
/// Cost of using this track relative to other paths. This cost is an
|
|
/// arbitrary unit and doesn't make sense unless compared to other track
|
|
/// costs.
|
|
cost: f32,
|
|
path: Path<Vec2<i32>>,
|
|
}
|
|
|
|
#[derive(Debug)]
|
|
pub struct Site {
|
|
pub kind: SiteKind,
|
|
pub center: Vec2<i32>,
|
|
pub place: Id<Place>,
|
|
|
|
population: f32,
|
|
|
|
// Total amount of each stock
|
|
stocks: Stocks<f32>,
|
|
// Surplus stock compared to demand orders
|
|
surplus: Stocks<f32>,
|
|
// For some goods, such a goods without any supply, it doesn't make sense to talk about value
|
|
values: Stocks<Option<f32>>,
|
|
|
|
// Proportion of individuals dedicated to an industry
|
|
labors: MapVec<Occupation, f32>,
|
|
// Per worker, per year, of their output good
|
|
yields: MapVec<Occupation, f32>,
|
|
productivity: MapVec<Occupation, f32>,
|
|
|
|
last_exports: Stocks<f32>,
|
|
export_targets: Stocks<f32>,
|
|
trade_states: Stocks<TradeState>,
|
|
coin: f32,
|
|
}
|
|
|
|
impl fmt::Display for Site {
|
|
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
|
|
match self.kind {
|
|
SiteKind::Settlement => writeln!(f, "Settlement")?,
|
|
SiteKind::Dungeon => writeln!(f, "Dungeon")?,
|
|
}
|
|
writeln!(f, "- population: {}", self.population.floor() as u32)?;
|
|
writeln!(f, "- coin: {}", self.coin.floor() as u32)?;
|
|
writeln!(f, "Stocks")?;
|
|
for (stock, q) in self.stocks.iter() {
|
|
writeln!(f, "- {}: {}", stock, q.floor())?;
|
|
}
|
|
writeln!(f, "Values")?;
|
|
for stock in TRADE_STOCKS.iter() {
|
|
writeln!(
|
|
f,
|
|
"- {}: {}",
|
|
stock,
|
|
self.values[*stock]
|
|
.map(|x| x.to_string())
|
|
.unwrap_or_else(|| "N/A".to_string())
|
|
)?;
|
|
}
|
|
writeln!(f, "Laborers")?;
|
|
for (labor, n) in self.labors.iter() {
|
|
writeln!(f, "- {}: {}", labor, (*n * self.population).floor() as u32)?;
|
|
}
|
|
writeln!(f, "Export targets")?;
|
|
for (stock, n) in self.export_targets.iter() {
|
|
writeln!(f, "- {}: {}", stock, n)?;
|
|
}
|
|
|
|
Ok(())
|
|
}
|
|
}
|
|
|
|
#[derive(Debug)]
|
|
pub enum SiteKind {
|
|
Settlement,
|
|
Dungeon,
|
|
}
|
|
|
|
impl Site {
|
|
pub fn simulate(&mut self, years: f32, nat_res: &NaturalResources) {
|
|
// Insert natural resources into the economy
|
|
if self.stocks[FISH] < nat_res.river {
|
|
self.stocks[FISH] = nat_res.river;
|
|
}
|
|
if self.stocks[WHEAT] < nat_res.farmland {
|
|
self.stocks[WHEAT] = nat_res.farmland;
|
|
}
|
|
if self.stocks[LOGS] < nat_res.wood {
|
|
self.stocks[LOGS] = nat_res.wood;
|
|
}
|
|
if self.stocks[GAME] < nat_res.wood {
|
|
self.stocks[GAME] = nat_res.wood;
|
|
}
|
|
if self.stocks[ROCK] < nat_res.rock {
|
|
self.stocks[ROCK] = nat_res.rock;
|
|
}
|
|
|
|
let orders = vec![
|
|
(None, vec![(FOOD, 0.5)]),
|
|
(Some(COOK), vec![(FLOUR, 16.0), (MEAT, 4.0), (WOOD, 3.0)]),
|
|
(Some(LUMBERJACK), vec![(LOGS, 4.5)]),
|
|
(Some(MINER), vec![(ROCK, 7.5)]),
|
|
(Some(FISHER), vec![(FISH, 4.0)]),
|
|
(Some(HUNTER), vec![(GAME, 4.0)]),
|
|
(Some(FARMER), vec![(WHEAT, 4.0)]),
|
|
]
|
|
.into_iter()
|
|
.collect::<HashMap<_, Vec<(Stock, f32)>>>();
|
|
|
|
// Per labourer, per year
|
|
let production = Stocks::from_list(&[
|
|
(FARMER, (FLOUR, 2.0)),
|
|
(LUMBERJACK, (WOOD, 1.5)),
|
|
(MINER, (STONE, 0.6)),
|
|
(FISHER, (MEAT, 3.0)),
|
|
(HUNTER, (MEAT, 0.25)),
|
|
(COOK, (FOOD, 20.0)),
|
|
]);
|
|
|
|
let mut demand = Stocks::from_default(0.0);
|
|
for (labor, orders) in &orders {
|
|
let scale = if let Some(labor) = labor {
|
|
self.labors[*labor]
|
|
} else {
|
|
1.0
|
|
} * self.population;
|
|
for (stock, amount) in orders {
|
|
demand[*stock] += *amount * scale;
|
|
}
|
|
}
|
|
|
|
let mut supply = Stocks::from_default(0.0);
|
|
for (labor, (output_stock, _)) in production.iter() {
|
|
supply[*output_stock] += self.yields[labor] * self.labors[labor] * self.population;
|
|
}
|
|
|
|
let last_exports = &self.last_exports;
|
|
let stocks = &self.stocks;
|
|
self.surplus = demand
|
|
.clone()
|
|
.map(|stock, _| supply[stock] + stocks[stock] - demand[stock] - last_exports[stock]);
|
|
|
|
// Update values according to the surplus of each stock
|
|
let values = &mut self.values;
|
|
self.surplus.iter().for_each(|(stock, surplus)| {
|
|
let val = 3.5f32.powf(1.0 - *surplus / demand[stock]);
|
|
values[stock] = if val > 0.001 && val < 1000.0 {
|
|
Some(val)
|
|
} else {
|
|
None
|
|
};
|
|
});
|
|
|
|
// Update export targets based on relative values
|
|
let value_avg = values
|
|
.iter()
|
|
.map(|(_, v)| (*v).unwrap_or(0.0))
|
|
.sum::<f32>()
|
|
.max(0.01)
|
|
/ values.iter().filter(|(_, v)| v.is_some()).count() as f32;
|
|
let export_targets = &mut self.export_targets;
|
|
let last_exports = &self.last_exports;
|
|
self.values.iter().for_each(|(stock, value)| {
|
|
let rvalue = (*value).map(|v| v - value_avg).unwrap_or(0.0);
|
|
//let factor = if export_targets[stock] > 0.0 { 1.0 / rvalue } else { rvalue };
|
|
export_targets[stock] = last_exports[stock] - rvalue * 0.1; // + (trade_states[stock].sell_belief.price - trade_states[stock].buy_belief.price) * 0.025;
|
|
});
|
|
|
|
let population = self.population;
|
|
|
|
// Redistribute workforce according to relative good values
|
|
let labor_ratios = production.clone().map(|labor, (output_stock, _)| {
|
|
self.productivity[labor] * demand[output_stock] / supply[output_stock].max(0.001)
|
|
});
|
|
let labor_ratio_sum = labor_ratios.iter().map(|(_, r)| *r).sum::<f32>().max(0.01);
|
|
production.iter().for_each(|(labor, _)| {
|
|
let smooth = 0.8;
|
|
self.labors[labor] = smooth * self.labors[labor]
|
|
+ (1.0 - smooth)
|
|
* (labor_ratios[labor].max(labor_ratio_sum / 1000.0) / labor_ratio_sum);
|
|
});
|
|
|
|
// Production
|
|
let stocks_before = self.stocks.clone();
|
|
for (labor, orders) in orders.iter() {
|
|
let scale = if let Some(labor) = labor {
|
|
self.labors[*labor]
|
|
} else {
|
|
1.0
|
|
} * population;
|
|
|
|
// For each order, we try to find the minimum satisfaction rate - this limits
|
|
// how much we can produce! For example, if we need 0.25 fish and
|
|
// 0.75 oats to make 1 unit of food, but only 0.5 units of oats are
|
|
// available then we only need to consume 2/3rds
|
|
// of other ingredients and leave the rest in stock
|
|
// In effect, this is the productivity
|
|
let productivity = orders
|
|
.iter()
|
|
.map(|(stock, amount)| {
|
|
// What quantity is this order requesting?
|
|
let _quantity = *amount * scale;
|
|
// What proportion of this order is the economy able to satisfy?
|
|
let satisfaction = (stocks_before[*stock] / demand[*stock]).min(1.0);
|
|
satisfaction
|
|
})
|
|
.min_by(|a, b| a.partial_cmp(b).unwrap())
|
|
.unwrap_or_else(|| {
|
|
panic!("Industry {:?} requires at least one input order", labor)
|
|
});
|
|
|
|
for (stock, amount) in orders {
|
|
// What quantity is this order requesting?
|
|
let quantity = *amount * scale;
|
|
// What amount gets actually used in production?
|
|
let used = quantity * productivity;
|
|
|
|
// Deplete stocks accordingly
|
|
self.stocks[*stock] = (self.stocks[*stock] - used).max(0.0);
|
|
}
|
|
|
|
// Industries produce things
|
|
if let Some(labor) = labor {
|
|
let (stock, rate) = production[*labor];
|
|
let workers = self.labors[*labor] * population;
|
|
let final_rate = rate;
|
|
let yield_per_worker = productivity * final_rate;
|
|
self.yields[*labor] = yield_per_worker;
|
|
self.productivity[*labor] = productivity;
|
|
self.stocks[stock] += yield_per_worker * workers.powf(1.1);
|
|
}
|
|
}
|
|
|
|
// Denature stocks
|
|
self.stocks.iter_mut().for_each(|(_, v)| *v *= 0.9);
|
|
|
|
// Births/deaths
|
|
const NATURAL_BIRTH_RATE: f32 = 0.15;
|
|
const DEATH_RATE: f32 = 0.05;
|
|
let birth_rate = if self.surplus[FOOD] > 0.0 {
|
|
NATURAL_BIRTH_RATE
|
|
} else {
|
|
0.0
|
|
};
|
|
self.population += years * self.population * (birth_rate - DEATH_RATE);
|
|
}
|
|
}
|
|
|
|
type Occupation = &'static str;
|
|
const FARMER: Occupation = "farmer";
|
|
const LUMBERJACK: Occupation = "lumberjack";
|
|
const MINER: Occupation = "miner";
|
|
const FISHER: Occupation = "fisher";
|
|
const HUNTER: Occupation = "hunter";
|
|
const COOK: Occupation = "cook";
|
|
|
|
type Stock = &'static str;
|
|
const WHEAT: Stock = "wheat";
|
|
const FLOUR: Stock = "flour";
|
|
const MEAT: Stock = "meat";
|
|
const FISH: Stock = "fish";
|
|
const GAME: Stock = "game";
|
|
const FOOD: Stock = "food";
|
|
const LOGS: Stock = "logs";
|
|
const WOOD: Stock = "wood";
|
|
const ROCK: Stock = "rock";
|
|
const STONE: Stock = "stone";
|
|
const TRADE_STOCKS: [Stock; 5] = [FLOUR, MEAT, FOOD, WOOD, STONE];
|
|
|
|
#[derive(Debug, Clone)]
|
|
struct TradeState {
|
|
buy_belief: econ::Belief,
|
|
sell_belief: econ::Belief,
|
|
}
|
|
|
|
impl Default for TradeState {
|
|
fn default() -> Self {
|
|
Self {
|
|
buy_belief: econ::Belief {
|
|
price: 1.0,
|
|
confidence: 0.25,
|
|
},
|
|
sell_belief: econ::Belief {
|
|
price: 1.0,
|
|
confidence: 0.25,
|
|
},
|
|
}
|
|
}
|
|
}
|
|
|
|
pub type Stocks<T> = MapVec<Stock, T>;
|
|
|
|
#[derive(Default, Clone, Debug)]
|
|
pub struct MapVec<K, T> {
|
|
entries: HashMap<K, T>,
|
|
default: T,
|
|
}
|
|
|
|
impl<K: Copy + Eq + Hash, T: Default + Clone> MapVec<K, T> {
|
|
pub fn from_list<'a>(i: impl IntoIterator<Item = &'a (K, T)>) -> Self
|
|
where
|
|
K: 'a,
|
|
T: 'a,
|
|
{
|
|
Self {
|
|
entries: i.into_iter().cloned().collect(),
|
|
default: T::default(),
|
|
}
|
|
}
|
|
|
|
pub fn from_default(default: T) -> Self {
|
|
Self {
|
|
entries: HashMap::default(),
|
|
default,
|
|
}
|
|
}
|
|
|
|
pub fn get_mut(&mut self, entry: K) -> &mut T {
|
|
let default = &self.default;
|
|
self.entries.entry(entry).or_insert_with(|| default.clone())
|
|
}
|
|
|
|
pub fn get(&self, entry: K) -> &T { self.entries.get(&entry).unwrap_or(&self.default) }
|
|
|
|
pub fn map<U: Default>(self, mut f: impl FnMut(K, T) -> U) -> MapVec<K, U> {
|
|
MapVec {
|
|
entries: self
|
|
.entries
|
|
.into_iter()
|
|
.map(|(s, v)| (s.clone(), f(s, v)))
|
|
.collect(),
|
|
default: U::default(),
|
|
}
|
|
}
|
|
|
|
pub fn iter(&self) -> impl Iterator<Item = (K, &T)> + '_ {
|
|
self.entries.iter().map(|(s, v)| (*s, v))
|
|
}
|
|
|
|
pub fn iter_mut(&mut self) -> impl Iterator<Item = (K, &mut T)> + '_ {
|
|
self.entries.iter_mut().map(|(s, v)| (*s, v))
|
|
}
|
|
}
|
|
|
|
impl<K: Copy + Eq + Hash, T: Default + Clone> std::ops::Index<K> for MapVec<K, T> {
|
|
type Output = T;
|
|
|
|
fn index(&self, entry: K) -> &Self::Output { self.get(entry) }
|
|
}
|
|
|
|
impl<K: Copy + Eq + Hash, T: Default + Clone> std::ops::IndexMut<K> for MapVec<K, T> {
|
|
fn index_mut(&mut self, entry: K) -> &mut Self::Output { self.get_mut(entry) }
|
|
}
|