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Optimally place towns.

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This gets rid of the arbitrary threshold values for what is and
isn't an acceptable town.
This commit is contained in:
Tormod G. Hellen 2023-05-29 19:09:37 +02:00
parent 69dcc12dcd
commit cf002478b8
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GPG Key ID: 13F76F45CB334E5B
1 changed files with 41 additions and 34 deletions
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53
world/src/civ/mod.rs
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@ -796,12 +796,20 @@ impl Civs {
_ => SiteKind::Refactor,
};
let world_dims = ctx.sim.get_aabr();
let site = attempt(100, || {
let avoid_town_enemies = ProximityRequirementsBuilder::new()
.avoid_all_of(self.town_enemies(), 60)
.finalize(&world_dims);
let loc = find_site_loc(ctx, &avoid_town_enemies, &kind)?;
Some(self.establish_site(ctx, loc, |place| Site {
let loc = (0..100)
.flat_map(|_| {
find_site_loc(ctx, &avoid_town_enemies, &kind).and_then(|loc| {
town_attributes_of_site(loc, ctx.sim)
.map(|town_attrs| (loc, town_attrs.score()))
})
})
.reduce(|a, b| if a.1 > b.1 { a } else { b })?
.0;
let site = self.establish_site(ctx, loc, |place| Site {
kind,
site_tmp: None,
center: loc,
@ -810,8 +818,7 @@ impl Civs {
/* last_exports: Stocks::from_default(0.0),
* export_targets: Stocks::from_default(0.0),
* //trade_states: Stocks::default(), */
}))
})?;
});
let civ = self.civs.insert(Civ {
capital: site,
@ -1665,6 +1672,15 @@ pub struct TownSiteAttributes {
building_materials: bool,
}
impl TownSiteAttributes {
pub fn score(&self) -> f32 {
3.0 * (self.food_score as f32 + 1.0).log2()
+ 2.0 * (self.forestry_score as f32 + 1.0).log2()
+ (self.mining_score as f32 + 1.0).log2()
+ (self.trading_score as f32 + 1.0).log2()
}
}
#[derive(Debug)]
pub struct Civ {
capital: Id<Site>,
@ -1749,17 +1765,12 @@ impl SiteKind {
};
sim.get(loc).map_or(false, |chunk| {
let suitable_for_town = |score_threshold: f32| -> bool {
let suitable_for_town = || -> bool {
let attributes = town_attributes_of_site(loc, sim);
attributes.map_or(false, |attr| {
let industry_score = 3.0 * (attr.food_score as f32 + 1.0).log2()
+ 2.0 * (attr.forestry_score as f32 + 1.0).log2()
+ (attr.mining_score as f32 + 1.0).log2()
+ (attr.trading_score as f32 + 1.0).log2();
attr.potable_water
&& attr.building_materials
&& industry_score > score_threshold
&& attr.heating
attributes.map_or(false, |attributes| {
attributes.potable_water
&& attributes.building_materials
&& attributes.heating
// Because of how the algorithm for site2 towns work, they have to start on land.
&& on_land()
})
@ -1780,20 +1791,16 @@ impl SiteKind {
},
SiteKind::Citadel => true,
SiteKind::CliffTown => {
(-0.6..0.4).contains(&chunk.temp)
&& chunk.near_cliffs()
&& suitable_for_town(4.0)
(-0.6..0.4).contains(&chunk.temp) && chunk.near_cliffs() && suitable_for_town()
},
SiteKind::SavannahPit => {
matches!(chunk.get_biome(), BiomeKind::Savannah)
&& !chunk.near_cliffs()
&& !chunk.river.near_water()
&& suitable_for_town(4.0)
&& suitable_for_town()
},
SiteKind::DesertCity => {
(0.9..1.0).contains(&chunk.temp)
&& !chunk.near_cliffs()
&& suitable_for_town(4.0)
(0.9..1.0).contains(&chunk.temp) && !chunk.near_cliffs() && suitable_for_town()
},
SiteKind::ChapelSite => {
matches!(chunk.get_biome(), BiomeKind::Ocean)
@ -1827,7 +1834,7 @@ impl SiteKind {
true
},
SiteKind::Dungeon => on_land(),
SiteKind::Refactor | SiteKind::Settlement => suitable_for_town(6.7),
SiteKind::Refactor | SiteKind::Settlement => suitable_for_town(),
SiteKind::Bridge(_, _) => true,
}
})