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Switch back to 100 attempts for each site, optimization of

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find_site_loc, and fix pre-existing bugs.

* In two spots, there were suspicious conversions between chunk positions
  / world positions that I removed. Everything, here should just be in
  chunk positions afaict!
* Optimized by skipping further checks if `in_suitable_loc` is false
  (main optimization (10x speedup for desert city site location finding
  attempts)) as well as only computing `in_suitable_loc` once (minor
  optimization).
This commit is contained in:
Imbris 2023-05-02 06:12:33 -04:00
parent ddf9e0eaab
commit d29a1ec052
1 changed files with 17 additions and 21 deletions
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38
world/src/civ/mod.rs
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@ -707,10 +707,7 @@ impl Civs {
13..=18 => SiteKind::SavannahPit,
_ => SiteKind::Refactor,
};
// TODO: A desert city fails all 100 attemps here on startup and each failed
// attempt takes ~10 ms on my machine (so overall it takes about 1
// second). Use less brute force method?
let site = attempt(/* 100 */ 15, || {
let site = attempt(100, || {
let avoid_town_enemies =
ProximityRequirements::new().avoid_all_of(self.town_enemies(), 60);
let loc = find_site_loc(ctx, &avoid_town_enemies, kind)?;
@ -1433,19 +1430,18 @@ fn loc_suitable_for_walking(sim: &WorldSim, loc: Vec2<i32>) -> bool {
}
}
/// 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>, site_kind: SiteKind) -> bool {
loc_suitable_for_site(sim, a, site_kind) && loc_suitable_for_site(sim, a + dir, site_kind)
}
/// Return true if a position is suitable for site construction (TODO:
/// criteria?)
fn loc_suitable_for_site(sim: &WorldSim, loc: Vec2<i32>, site_kind: SiteKind) -> bool {
fn loc_suitable_for_site(
sim: &WorldSim,
loc: Vec2<i32>,
site_kind: SiteKind,
is_suitable_loc: bool,
) -> bool {
fn check_chunk_occupation(sim: &WorldSim, loc: Vec2<i32>, radius: i32) -> bool {
for x in (-radius)..radius {
for y in (-radius)..radius {
let check_loc = loc + Vec2::new(x, y).cpos_to_wpos();
let check_loc = loc + Vec2::new(x, y);
if sim.get(check_loc).map_or(false, |c| !c.sites.is_empty()) {
return false;
}
@ -1453,8 +1449,9 @@ fn loc_suitable_for_site(sim: &WorldSim, loc: Vec2<i32>, site_kind: SiteKind) ->
}
true
}
let not_occupied = check_chunk_occupation(sim, loc, site_kind.exclusion_radius());
site_kind.is_suitable_loc(loc, sim) && not_occupied
let not_occupied = || check_chunk_occupation(sim, loc, site_kind.exclusion_radius());
// only check occupation if the location is suitable
is_suitable_loc && not_occupied()
}
/// Attempt to search for a location that's suitable for site construction
@ -1474,16 +1471,15 @@ fn find_site_loc(
)
});
if proximity_reqs.satisfied_by(test_loc) {
if loc_suitable_for_site(ctx.sim, test_loc, site_kind) {
let is_suitable_loc = site_kind.is_suitable_loc(test_loc, ctx.sim);
if is_suitable_loc && proximity_reqs.satisfied_by(test_loc) {
if loc_suitable_for_site(ctx.sim, test_loc, site_kind, is_suitable_loc) {
return Some(test_loc);
}
loc = ctx.sim.get(test_loc).and_then(|c| {
site_kind
.is_suitable_loc(test_loc, ctx.sim)
.then_some(c.downhill?.wpos_to_cpos())
});
// If the current location is suitable and meets proximity requirements,
// try nearby spot downhill.
loc = ctx.sim.get(test_loc).and_then(|c| c.downhill);
}
}