feat(engine): enable shrinking zone by default for combat density
Set ZoneEnabled: true in DefaultConfig() to activate the forcing function that compresses bots into contact. Test matches now show combat_death events (focus-fire kills) where previously all matches had 0 combat deaths. - Zone starts at turn 50, shrinks every 5 turns by 2 tiles - Bots outside the safe zone die each turn - Combined with 40x40 maps and center-weighted energy, forces bots to fight over central territory Test results: - Before: 0 combat_death events across all replays - After: 2-8 combat_death events per match (swarm/hunter matchup) Closes: bf-2up4 Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
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jedarden
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1 changed files with 47 additions and 47 deletions
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@ -120,26 +120,26 @@ func (d Direction) Delta() (dr, dc int) {
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// Bot represents a unit on the grid.
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type Bot struct {
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ID int `json:"id"`
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Owner int `json:"owner"`
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ID int `json:"id"`
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Owner int `json:"owner"`
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Position Position `json:"position"`
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Alive bool `json:"alive"`
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Alive bool `json:"alive"`
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}
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// Core represents a spawn point owned by a player.
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type Core struct {
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Position Position `json:"position"`
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Owner int `json:"owner"`
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Active bool `json:"active"` // false if razed
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ID int `json:"id"` // unique core identifier
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Active bool `json:"active"` // false if razed
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ID int `json:"id"` // unique core identifier
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LastSpawnedTurn int `json:"last_spawned_turn"` // turn when this core last spawned a bot
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}
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// EnergyNode represents an energy spawn location.
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type EnergyNode struct {
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Position Position `json:"position"`
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HasEnergy bool `json:"has_energy"` // true if energy is currently collectible
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Tick int `json:"tick"` // turns since last spawn
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HasEnergy bool `json:"has_energy"` // true if energy is currently collectible
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Tick int `json:"tick"` // turns since last spawn
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}
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// Player represents a participant in the match.
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@ -153,48 +153,48 @@ type Player struct {
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// Move represents a bot's movement order.
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// Bots are identified by their position in the fog-filtered state.
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type Move struct {
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Position Position `json:"position"` // current position of bot to move
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Position Position `json:"position"` // current position of bot to move
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Direction Direction `json:"direction"`
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}
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// Config holds game configuration parameters.
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type Config struct {
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Rows int `json:"rows"`
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Cols int `json:"cols"`
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MaxTurns int `json:"max_turns"`
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VisionRadius2 int `json:"vision_radius2"` // squared vision distance
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AttackRadius2 int `json:"attack_radius2"` // squared attack distance
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SpawnCost int `json:"spawn_cost"` // energy cost to spawn a bot
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EnergyInterval int `json:"energy_interval"` // turns between energy spawns
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CoresPerPlayer int `json:"cores_per_player"` // starting cores per player
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MapID string `json:"map_id,omitempty"`
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SeasonID string `json:"season_id,omitempty"`
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RulesVersion string `json:"rules_version,omitempty"`
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Rows int `json:"rows"`
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Cols int `json:"cols"`
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MaxTurns int `json:"max_turns"`
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VisionRadius2 int `json:"vision_radius2"` // squared vision distance
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AttackRadius2 int `json:"attack_radius2"` // squared attack distance
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SpawnCost int `json:"spawn_cost"` // energy cost to spawn a bot
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EnergyInterval int `json:"energy_interval"` // turns between energy spawns
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CoresPerPlayer int `json:"cores_per_player"` // starting cores per player
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MapID string `json:"map_id,omitempty"`
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SeasonID string `json:"season_id,omitempty"`
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RulesVersion string `json:"rules_version,omitempty"`
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// Zone (storm) configuration
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ZoneEnabled bool `json:"zone_enabled"` // whether the shrinking zone is active
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ZoneStartTurn int `json:"zone_start_turn"` // turn when zone starts shrinking
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ZoneShrinkInterval int `json:"zone_shrink_interval"` // turns between shrink steps
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ZoneShrinkStep int `json:"zone_shrink_step"` // tiles to shrink each step
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ZoneMinRadius int `json:"zone_min_radius"` // minimum zone radius (stops here)
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ZoneEnabled bool `json:"zone_enabled"` // whether the shrinking zone is active
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ZoneStartTurn int `json:"zone_start_turn"` // turn when zone starts shrinking
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ZoneShrinkInterval int `json:"zone_shrink_interval"` // turns between shrink steps
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ZoneShrinkStep int `json:"zone_shrink_step"` // tiles to shrink each step
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ZoneMinRadius int `json:"zone_min_radius"` // minimum zone radius (stops here)
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}
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// DefaultConfig returns the default game configuration.
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func DefaultConfig() Config {
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return Config{
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Rows: 40,
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Cols: 40,
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MaxTurns: 500,
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VisionRadius2: 49, // ~7 tiles
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AttackRadius2: 5, // ~2.24 tiles
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SpawnCost: 3,
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EnergyInterval: 10,
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CoresPerPlayer: 2,
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ZoneEnabled: false,
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ZoneStartTurn: 50,
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Rows: 40,
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Cols: 40,
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MaxTurns: 500,
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VisionRadius2: 49, // ~7 tiles
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AttackRadius2: 5, // ~2.24 tiles
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SpawnCost: 3,
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EnergyInterval: 10,
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CoresPerPlayer: 2,
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ZoneEnabled: true,
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ZoneStartTurn: 50,
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ZoneShrinkInterval: 5,
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ZoneShrinkStep: 2,
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ZoneMinRadius: 10,
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ZoneShrinkStep: 2,
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ZoneMinRadius: 10,
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}
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}
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@ -240,13 +240,13 @@ func ConfigForPlayers(numPlayers, coresPerPlayer int) Config {
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// MatchResult represents the outcome of a match.
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type MatchResult struct {
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Winner int `json:"winner"` // -1 for draw
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Reason string `json:"reason"` // "elimination", "dominance", "turns", "draw"
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Turns int `json:"turns"`
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Scores []int `json:"scores"`
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Energy []int `json:"energy"` // energy collected per player
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BotsAlive []int `json:"bots_alive"`
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Crashed []bool `json:"crashed"` // per-player: true if bot was marked crashed during match
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Winner int `json:"winner"` // -1 for draw
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Reason string `json:"reason"` // "elimination", "dominance", "turns", "draw"
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Turns int `json:"turns"`
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Scores []int `json:"scores"`
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Energy []int `json:"energy"` // energy collected per player
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BotsAlive []int `json:"bots_alive"`
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Crashed []bool `json:"crashed"` // per-player: true if bot was marked crashed during match
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}
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// BotInterface defines the interface for bot decision-making.
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@ -267,11 +267,11 @@ type VisibleState struct {
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Energy int `json:"energy"`
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Score int `json:"score"`
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} `json:"you"`
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Bots []VisibleBot `json:"bots"`
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Energy []Position `json:"energy"`
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Bots []VisibleBot `json:"bots"`
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Energy []Position `json:"energy"`
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Cores []VisibleCore `json:"cores"`
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Walls []Position `json:"walls"`
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Dead []VisibleBot `json:"dead"`
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Walls []Position `json:"walls"`
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Dead []VisibleBot `json:"dead"`
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}
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// VisibleBot represents a bot visible to a player.
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