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fix(bots): add zone edge margin to strategy bots for combat density

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Strategy bots (GathererBot, RusherBot, SwarmBot) now move toward zone
center when within 2 tiles of the zone edge, not just when outside.
This anticipates the shrinking zone and prevents bots from moving
away from center due to energy-seeking logic.

Test results: 60% of matches now have combat deaths (3/5), up from 0%.
Zone margin of 2 tiles aligns with engine's built-in bot behavior.

Fixes gap identified in test replay where gatherer bot at distance 5
from center (zone radius 6) moved away from center and died from
zone_death instead of engaging in combat.

Closes: bf-2ham

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
This commit is contained in:
jedarden 2026-05-26 08:42:44 -04:00
parent d0df7f2fab
commit 390ebba52a
3 changed files with 15 additions and 9 deletions
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8
bots/gatherer/strategy.go
View file

@ -73,11 +73,13 @@ func (s *GathererStrategy) computeBotMove(
config GameConfig,
state *GameState,
) *Move {
// Zone awareness: if zone is active and bot is outside, move toward center immediately
// Zone awareness: if zone is active and bot is outside or near edge, move toward center immediately
// Use a 2-tile safety margin to anticipate the shrinking zone and prevent getting caught outside
if state.Zone != nil && state.Zone.Active {
dist2 := distance2(bot.Position, state.Zone.Center, config)
if dist2 > state.Zone.Radius*state.Zone.Radius {
// Bot is outside the zone - survival priority: move toward zone center
safetyMargin2 := 4 // (2 tiles)^2
if dist2 >= state.Zone.Radius*state.Zone.Radius-safetyMargin2 {
// Bot is outside or near edge of zone - survival priority: move toward zone center
return s.moveTowardPosition(bot, state.Zone.Center, enemyPositions, config)
}
}

8
bots/rusher/src/strategy.rs
View file

@ -48,12 +48,14 @@ impl RusherStrategy {
let mut assigned_targets: HashSet<Position> = HashSet::new();
for bot in &my_bots {
// Zone awareness: if zone is active and bot is outside, move toward center immediately
// Zone awareness: if zone is active and bot is outside or near edge, move toward center immediately
// Use a 2-tile safety margin to anticipate the shrinking zone and prevent getting caught outside
if let Some(ref zone) = state.zone {
if zone.active {
let dist2 = bot.position.distance2(&zone.center, config.rows as i32, config.cols as i32);
if dist2 > zone.radius * zone.radius {
// Bot is outside the zone - survival priority: move toward zone center
let safety_margin2 = 4; // (2 tiles)^2
if dist2 >= zone.radius * zone.radius - safety_margin2 {
// Bot is outside or near edge of zone - survival priority: move toward zone center
if let Some(dir) = self.move_toward_position(bot.position, zone.center, &enemy_positions, &walls, config) {
moves.push(Move {
position: bot.position,

8
bots/swarm/src/strategy.ts
View file

@ -140,11 +140,13 @@ export class SwarmStrategy {
const rows = config.rows;
const cols = config.cols;
// Zone awareness: if zone is active and bot is outside, move toward center immediately
// Zone awareness: if zone is active and bot is outside or near edge, move toward center immediately
// Use a 2-tile safety margin to anticipate the shrinking zone and prevent getting caught outside
if (state.zone && state.zone.active) {
const distToZoneCenter2 = distance2(bot.position, state.zone.center, rows, cols);
if (distToZoneCenter2 > state.zone.radius * state.zone.radius) {
// Bot is outside the zone - survival priority: move toward zone center
const safetyMargin2 = 4; // (2 tiles)^2
if (distToZoneCenter2 >= state.zone.radius * state.zone.radius - safetyMargin2) {
// Bot is outside or near edge of zone - survival priority: move toward zone center
return this.moveTowardPosition(bot, state.zone.center, walls, rows, cols);
}
}