Christopher Wiebe
b451f83174
Captures the pre-Godot-port state of the codebase. This is the rollback anchor for the Godot port (M0 of theriapolis-rpg-implementation-plan-godot-port.md). All Phase 0 through Phase 6.5 work is included; Phase 7 is in flight. Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
66 lines
2.7 KiB
C#
66 lines
2.7 KiB
C#
using Theriapolis.Core.Rules.Combat;
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using Theriapolis.Core.Util;
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namespace Theriapolis.Core.Entities.Ai;
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/// <summary>
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/// Like <see cref="BrigandBehavior"/>, but flees when reduced below
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/// <c>FLEE_HP_FRACTION</c> of max HP — wild animals don't have honor.
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/// </summary>
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public sealed class WildAnimalBehavior : INpcBehavior
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{
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public const float FLEE_HP_FRACTION = 0.25f;
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public void TakeTurn(Combatant self, AiContext ctx)
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{
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if (self.IsDown) return;
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var target = ctx.FindClosestHostile(self);
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if (target is null) return;
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// Flee at low HP — move directly away, don't attack.
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if (self.CurrentHp <= self.MaxHp * FLEE_HP_FRACTION)
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{
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int tiles = ctx.Encounter.CurrentTurn.RemainingMovementFt / 5;
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for (int i = 0; i < tiles; i++)
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{
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var away = StepAwayFrom(self.Position, target.Position);
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if ((int)away.X == (int)self.Position.X && (int)away.Y == (int)self.Position.Y) break;
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self.Position = away;
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ctx.Encounter.AppendLog(CombatLogEntry.Kind.Move,
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$"{self.Name} flees to ({(int)away.X},{(int)away.Y}).");
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}
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ctx.Encounter.CurrentTurn.ConsumeMovement(tiles * 5);
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return;
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}
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// Otherwise, identical to Brigand: close + attack.
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var attack = self.AttackOptions[0];
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int tilesAvail = ctx.Encounter.CurrentTurn.RemainingMovementFt / 5;
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while (!ReachAndCover.IsInReach(self, target, attack) && tilesAvail > 0)
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{
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var next = ReachAndCover.StepToward(self.Position, target.Position);
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if ((int)next.X == (int)self.Position.X && (int)next.Y == (int)self.Position.Y) break;
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self.Position = next;
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ctx.Encounter.AppendLog(CombatLogEntry.Kind.Move,
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$"{self.Name} moves to ({(int)next.X},{(int)next.Y}).");
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tilesAvail--;
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}
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int consumedTiles = (ctx.Encounter.CurrentTurn.RemainingMovementFt / 5) - tilesAvail;
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ctx.Encounter.CurrentTurn.ConsumeMovement(consumedTiles * 5);
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if (!ReachAndCover.IsInReach(self, target, attack)) return;
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Resolver.AttemptAttack(ctx.Encounter, self, target, attack);
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ctx.Encounter.CurrentTurn.ConsumeAction();
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}
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private static Vec2 StepAwayFrom(Vec2 from, Vec2 menace)
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{
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// Reverse of StepToward — increment by sign of (from - menace) so we
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// move away from the menace.
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int dx = System.Math.Sign(from.X - menace.X);
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int dy = System.Math.Sign(from.Y - menace.Y);
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if (dx == 0 && dy == 0) dx = 1; // pick a direction if standing on top
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return new Vec2((int)from.X + dx, (int)from.Y + dy);
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}
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}
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