erik/acdream
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

feat(A.5 T17): WbDrawDispatcher Change #1 — animated-walk fix + WalkEntities helper

Browse source 
Per Phase A.5 spec §4.6 Change #1: when an LB is invisible AND
animatedEntityIds is non-empty, the inner loop walked every entity
in the LB just to find the few animated ones. At ~10.7K entities
(N1=4) that is wasted iteration cost per frame.

Extracted a pure-CPU internal static WalkEntities helper. When LB
is invisible: iterate animatedEntityIds directly and look each up
in a per-LB AnimatedById dictionary (typically <50 animated vs
~10K total). When LB is visible: walk all entities as before.

GpuWorldState.LandblockEntries now yields an AnimatedById map as a
5th tuple field alongside the AABB tuple. Dictionary is built on
each yield (cheap — ~132 entities/LB max). A caching layer is out
of A.5 scope.

WbDrawDispatcher.Draw signature updated to consume the 5-tuple.
GameWindow.cs call site passes _worldState.LandblockEntries which
now yields the 5-tuple — no change needed there.

8 new tests in WbDrawDispatcherBucketingTests cover T17 Change #1
(invisible LB / animated set / neverCull / null frustum) and
T18 Change #2 guard tests (cached AABB / dirty flag / animated bypass).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
This commit is contained in:
Erik 2026-05-10 08:18:02 +02:00
parent 0de6bc9c96
commit 003443cd1a
3 changed files with 546 additions and 90 deletions
Download patch file Download diff file Expand all files Collapse all files

22
src/AcDream.App/Streaming/GpuWorldState.cs
View file

@ -106,17 +106,33 @@ public sealed class GpuWorldState
/// Per-landblock iteration with AABB data for use by the frustum-culling
/// draw path. Landblocks without a stored AABB yield <see cref="Vector3.Zero"/>
/// for both corners, which the culler will conservatively treat as visible.
///
/// <para>
/// A.5 T17: also yields an <c>AnimatedById</c> dictionary built on the fly
/// from the landblock's entity list. This lets <see cref="WbDrawDispatcher"/>
/// skip the full entity walk when the landblock is frustum-culled but animated
/// entities inside it must still be processed (Change #1).
/// Building the dict per-yield is cheap (~132 entities/LB max). A caching
/// layer is out of A.5 scope.
/// </para>
/// </summary>
public IEnumerable<(uint LandblockId, Vector3 AabbMin, Vector3 AabbMax, IReadOnlyList<WorldEntity> Entities)> LandblockEntries
public IEnumerable<(uint LandblockId, Vector3 AabbMin, Vector3 AabbMax,
IReadOnlyList<WorldEntity> Entities,
IReadOnlyDictionary<uint, WorldEntity>? AnimatedById)> LandblockEntries
{
get
{
foreach (var kvp in _loaded)
{
// Build AnimatedById on the fly — cheap (~132 entities/LB max).
var byId = new Dictionary<uint, WorldEntity>(kvp.Value.Entities.Count);
foreach (var e in kvp.Value.Entities)
byId[e.Id] = e;
if (_aabbs.TryGetValue(kvp.Key, out var aabb))
yield return (kvp.Key, aabb.Min, aabb.Max, kvp.Value.Entities);
yield return (kvp.Key, aabb.Min, aabb.Max, kvp.Value.Entities, byId);
else
yield return (kvp.Key, Vector3.Zero, Vector3.Zero, kvp.Value.Entities);
yield return (kvp.Key, Vector3.Zero, Vector3.Zero, kvp.Value.Entities, byId);
}
}
}