acdream

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Author	SHA1	Message	Date
Erik	6e8117741b	feat(#182 ): PhysicsBody fsf state + CachedVelocity; ungate small-velocity-zero (Slice 1a) Verbatim UpdatePhysicsInternal (0x00510700): the small-velocity-zero (<0.25 m/s) fires unconditionally, not gated on OnWalkable (the old acdream divergence) — gravity re-accelerates the same frame via the unconditional v += a*dt. Adds TransientStateFlags.Stationary{Fall,Stop,Stuck} (0x10/0x20/0x40) for the fsf round-trip, plus PhysicsBody.FramesStationaryFall and the separate CachedVelocity field (retail's two-velocity model — reporting/DR only, never fed to the integrator). All 1536 physics tests green. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>	2026-07-07 13:39:28 +02:00
Erik	6a5d8c1580	feat(core): port decompiled AC client physics — CollisionPrimitives + PhysicsBody Two major C# ports from the decompiled retail AC client (acclient.exe): 1. CollisionPrimitives (9 functions, 26 tests): - SphereIntersectsRay, RayPlaneIntersect, CalcNormal - SphereIntersectsPoly, FindTimeOfCollision - HitsWalkable, FindWalkableCollision - SlideSphere, LandOnSphere Ported from chunk_00530000.c functions FUN_005384e0 through FUN_0053a230. Cross-referenced against ACE's Physics/ C# port for algorithm verification. 2. PhysicsBody (7 methods, 31 tests): - update_object (top-level per-frame, sub-stepped at MaxQuantum=0.1) - UpdatePhysicsInternal (Euler: pos += vdt + 0.5a*dt²) - calc_acceleration (gravity=-9.8 when HasGravity) - set_velocity (clamp to MaxVelocity=50) - set_local_velocity (body→world via quaternion) - set_on_walkable, calc_friction (ground normal + pow decay) Ported from chunk_00510000.c/chunk_00500000.c. Struct layout confirmed against ACE PhysicsObj field offsets. 367 total tests green (258 core + 109 net). 57 new tests. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>	2026-04-12 23:54:51 +02:00

Author

SHA1

Message

Date

Erik

6e8117741b

feat(#182 ): PhysicsBody fsf state + CachedVelocity; ungate small-velocity-zero (Slice 1a)

Verbatim UpdatePhysicsInternal (0x00510700): the small-velocity-zero
(<0.25 m/s) fires unconditionally, not gated on OnWalkable (the old acdream
divergence) — gravity re-accelerates the same frame via the unconditional
v += a*dt. Adds TransientStateFlags.Stationary{Fall,Stop,Stuck} (0x10/0x20/0x40)
for the fsf round-trip, plus PhysicsBody.FramesStationaryFall and the separate
CachedVelocity field (retail's two-velocity model — reporting/DR only, never fed
to the integrator). All 1536 physics tests green.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

2026-07-07 13:39:28 +02:00

Erik

6a5d8c1580

feat(core): port decompiled AC client physics — CollisionPrimitives + PhysicsBody

Two major C# ports from the decompiled retail AC client (acclient.exe):

1. CollisionPrimitives (9 functions, 26 tests):
   - SphereIntersectsRay, RayPlaneIntersect, CalcNormal
   - SphereIntersectsPoly, FindTimeOfCollision
   - HitsWalkable, FindWalkableCollision
   - SlideSphere, LandOnSphere
   Ported from chunk_00530000.c functions FUN_005384e0 through FUN_0053a230.
   Cross-referenced against ACE's Physics/ C# port for algorithm verification.

2. PhysicsBody (7 methods, 31 tests):
   - update_object (top-level per-frame, sub-stepped at MaxQuantum=0.1)
   - UpdatePhysicsInternal (Euler: pos += v*dt + 0.5*a*dt²)
   - calc_acceleration (gravity=-9.8 when HasGravity)
   - set_velocity (clamp to MaxVelocity=50)
   - set_local_velocity (body→world via quaternion)
   - set_on_walkable, calc_friction (ground normal + pow decay)
   Ported from chunk_00510000.c/chunk_00500000.c.
   Struct layout confirmed against ACE PhysicsObj field offsets.

367 total tests green (258 core + 109 net). 57 new tests.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

2026-04-12 23:54:51 +02:00

2 commits