Hazard: Blight geyser — permanent periodic both-sides AoE (Phase 1.5b bundle 3)

Review-first netcode slice (design review wf_900e9965-8f0 -> 11 folded; post-impl wf_5c8299f8-299 clean). A PERMANENT periodic telegraphed AoE in Blight-biome rooms only; one new [GhostField] uint NextEruptTick. - Geyser component + GeyserEruptSystem (server): inverted invalid-tick guard (a baked-0 tick must NEVER erupt -> lazy-stamps born-correct instead of the party-wiping per-tick barrage), inline both-sides gather (SourceNetworkId=-1), reschedule = now + period (never +=), never destroyed. - GeyserTelegraphSystem (client): absolute-tick growing warning disc + erupt burst on the >0->=<0 crossing, latched per NextEruptTick + arm-guard (never edge-detects the replicated field -> no phantom on 0->stamp / relevancy re-entry). Reuses ScorchDecalSystem + DynamicLightSystem. - Seeded in RoomFieldSystem (Blight-gated on plan.Biome, born-correct staggered stamp from live ServerTick), GeyserFieldSpawner + authoring wired into the Gameplay subscene. Geyser.prefab duplicated from ResourceNode (no collider). - BuildDisc promoted to FeedbackFx (shared with the barrel fuse ring). - 474/474 EditMode incl. the unstamped-storm regression; live no-storm end-to-end. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
2026-07-12 13:53:48 -07:00
parent f271d5f47f
commit 4febf3dfe2
21 changed files with 826 additions and 21 deletions
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+using ProjectM.Simulation;
+using Unity.Burst;
+using Unity.Collections;
+using Unity.Entities;
+using Unity.Mathematics;
+using Unity.NetCode;
+using Unity.Transforms;
+
+namespace ProjectM.Server
+{
+    /// <summary>
+    /// Erupts PERMANENT Blight <see cref="Geyser"/>s (Geyser_Build_Spec, design-review wf_900e9965-8f0): when a
+    /// geyser's replicated <see cref="Geyser.NextEruptTick"/> elapses, radius-damage LIVING enemies AND players
+    /// (friendly fire — the bait/lure mechanic, exactly like the exploding-barrel hazard), then RESCHEDULE
+    /// NextEruptTick one period ahead of NOW and leave the geyser alive (it is permanent — <see cref="RoomTag"/>
+    /// teardown is the only removal; NEVER DestroyEntity here). Player + enemy gather mirrors
+    /// <see cref="HazardExplosionSystem"/> VERBATIM (Health &gt; 0; players also RegionTag == Expedition;
+    /// <see cref="DamageEvent.SourceNetworkId"/> = -1 environment convention; SourceTick stamped at NOW, the
+    /// authoring tick, so dash i-frames negate against it).
+    /// <para>
+    /// ★ The invalid-tick guard is INVERTED from the barrel (review HIGH H2): an unstamped/invalid NextEruptTick
+    /// (0, the "ready" sentinel) is NOT-READY and is SKIPPED — it must NEVER erupt. Copying the barrel's
+    /// "invalid -&gt; detonate" fall-through onto a born-0 [GhostField] would erupt every tick and wipe the party.
+    /// The reschedule is <c>= now + period</c> (NEVER <c>+=</c> — an anchored accumulator catch-up-storms after any
+    /// multi-period skip; every tick-sentinel in the project is <c>= now + delay</c>). Plain server
+    /// <see cref="SimulationSystemGroup"/>, NO ordering edges; presence-gated on <see cref="Geyser"/>.
+    /// </para>
+    /// </summary>
+    [BurstCompile]
+    [WorldSystemFilter(WorldSystemFilterFlags.ServerSimulation)]
+    [UpdateInGroup(typeof(SimulationSystemGroup))]
+    public partial struct GeyserEruptSystem : ISystem
+    {
+        [BurstCompile]
+        public void OnCreate(ref SystemState state)
+        {
+            state.RequireForUpdate<Geyser>();
+        }
+
+        [BurstCompile]
+        public void OnUpdate(ref SystemState state)
+        {
+            if (!SystemAPI.TryGetSingleton<NetworkTime>(out var netTime) || !netTime.ServerTick.IsValid)
+                return;
+            var serverTick = netTime.ServerTick;
+            uint stamp = TickUtil.NonZero(serverTick.TickIndexForValidTick);              // SourceTick = NOW (authoring tick)
+            uint reschedule = TickUtil.NonZero(serverTick.TickIndexForValidTick + Tuning.GeyserPeriodTicks); // = now + period
+
+            var erupts = new NativeList<float3>(Allocator.Temp);
+            foreach (var (geyser, lt) in SystemAPI.Query<RefRW<Geyser>, RefRO<LocalTransform>>())
+            {
+                uint next = geyser.ValueRO.NextEruptTick;
+                var until = new NetworkTick(next);
+                // INVERTED guard (review H2): an unstamped/invalid NextEruptTick (0) is NOT-READY and must NEVER
+                // erupt. LAZY-STAMP it born-correct (now + period) instead — self-heals the rare case where the
+                // seed-time stamp missed (NetworkTime invalid at seed), so a 0 can neither storm nor stay inert.
+                if (next == 0u || !until.IsValid) { geyser.ValueRW.NextEruptTick = reschedule; continue; }
+                if (until.IsNewerThan(serverTick)) continue; // still counting down
+                erupts.Add(lt.ValueRO.Position);
+                geyser.ValueRW.NextEruptTick = reschedule;   // reschedule in place; permanent, never destroyed
+            }
+
+            if (erupts.Length > 0)
+            {
+                float radiusSq = Tuning.GeyserEruptRadius * Tuning.GeyserEruptRadius;
+                var ecb = new EntityCommandBuffer(Allocator.Temp);
+
+                // Players: living + expedition only (the HazardExplosionSystem gather verbatim).
+                foreach (var (hp, region, plt, player) in
+                         SystemAPI.Query<RefRO<Health>, RefRO<RegionTag>, RefRO<LocalTransform>>()
+                             .WithAll<PlayerTag>().WithEntityAccess())
+                {
+                    if (hp.ValueRO.Current <= 0f || region.ValueRO.Region != RegionId.Expedition) continue;
+                    for (int i = 0; i < erupts.Length; i++)
+                        if (math.distancesq(plt.ValueRO.Position.xz, erupts[i].xz) <= radiusSq)
+                            ecb.AppendToBuffer(player, new DamageEvent
+                            {
+                                Amount = Tuning.GeyserEruptDamage,
+                                SourceNetworkId = -1,
+                                SourceTick = stamp,
+                            });
+                }
+
+                // Enemies: living only (Health > 0 also excludes Dying corpses, the established convention).
+                foreach (var (hp, elt, enemy) in
+                         SystemAPI.Query<RefRO<Health>, RefRO<LocalTransform>>()
+                             .WithAll<EnemyTag>().WithEntityAccess())
+                {
+                    if (hp.ValueRO.Current <= 0f) continue;
+                    for (int i = 0; i < erupts.Length; i++)
+                        if (math.distancesq(elt.ValueRO.Position.xz, erupts[i].xz) <= radiusSq)
+                            ecb.AppendToBuffer(enemy, new DamageEvent
+                            {
+                                Amount = Tuning.GeyserEruptDamage,
+                                SourceNetworkId = -1,
+                                SourceTick = stamp,
+                            });
+                }
+
+                ecb.Playback(state.EntityManager);
+                ecb.Dispose();
+            }
+            erupts.Dispose();
+        }
+    }
+}
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