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MP: peer true-mirror cadence -- drive the body clip from actual replicated motion (task #50)

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Toward a truer mirror (user: peer 'hesitates/skips on accel/decel, master has
smoother transitions').  The body channel FOLLOWS the master's replicated STATE
(96a896a) but its CADENCE (bodyCycleSpeed) is still slewed LOCALLY toward the
replicated commanded speed -- which drifts from the master's actual cadence, so
the animation phase wanders until a record snaps it (the hesitation).

FIX (replicant-gated, single-player untouched): peerMirrorSpeed member = the
actual replicated ground speed (|updateVelocity|, set in the peer branch); the
body channel walk (6/7) + reverse (0xc/0xd) cases override bodyCycleSpeed with
it (clamped to the state's band) right before the clip advance, so the peer's
clip advances at the master's REAL rate instead of a locally-drifting slew.
peerMirrorSpeed = -1 on the master/single-player -> the authentic slew runs.
BT_NO_MIRROR_CAD / BT_PEER_LEGCH revert.

Verified autonomous (through-zero sweep): no crash, body channel advances forward
(back-steps ~0), feet track (position ratio 1.05, maxStep 1.68u).  Perceived
smoothness is the visual test (harness saturates).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
This commit is contained in:
arcattack
2026-07-15 07:58:11 -05:00
co-authored by Claude Opus 4.8
parent f094d78df1
commit 23f1532fb0
4 changed files with 30 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files
game/reconstructed/mech2.cpp
+12
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@@ -999,6 +999,9 @@ Scalar
if (bodyCycleSpeed > bodyTargetSpeed) bodyCycleSpeed = bodyTargetSpeed;
if (bodyCycleSpeed > walkStrideLength) bodyCycleSpeed = walkStrideLength;
}
if (peerMirrorSpeed >= 0.0f) // peer: cadence == actual mirrored ground speed
bodyCycleSpeed = (peerMirrorSpeed < standSpeed) ? standSpeed
: ((peerMirrorSpeed > walkStrideLength) ? walkStrideLength : peerMirrorSpeed);
distance = bodyAnimation.Advance(
time_slice * (bodyCycleSpeed / walkStrideLength) * globalTimeScale, loop);
break;
@@ -1019,6 +1022,9 @@ Scalar
if (bodyCycleSpeed > bodyTargetSpeed) bodyCycleSpeed = bodyTargetSpeed;
if (bodyCycleSpeed > reverseSpeedMax2) bodyCycleSpeed = reverseSpeedMax2;
}
if (peerMirrorSpeed >= 0.0f) // peer: cadence == actual mirrored ground speed
bodyCycleSpeed = (peerMirrorSpeed < reverseSpeedMax) ? reverseSpeedMax
: ((peerMirrorSpeed > reverseSpeedMax2) ? reverseSpeedMax2 : peerMirrorSpeed);
distance = bodyAnimation.Advance(
time_slice * (bodyCycleSpeed / reverseStrideLength) * globalTimeScale, loop);
break;
@@ -1159,6 +1165,9 @@ Scalar
if (bodyCycleSpeed > bodyTargetSpeed) bodyCycleSpeed = bodyTargetSpeed;
if (bodyCycleSpeed > walkStrideLength) bodyCycleSpeed = walkStrideLength;
}
if (peerMirrorSpeed >= 0.0f) // peer: cadence == actual mirrored ground speed
bodyCycleSpeed = (peerMirrorSpeed < standSpeed) ? standSpeed
: ((peerMirrorSpeed > walkStrideLength) ? walkStrideLength : peerMirrorSpeed);
distance = bodyAnimation.Advance(
time_slice * (bodyCycleSpeed / walkStrideLength) * globalTimeScale, loop);
break;
@@ -1179,6 +1188,9 @@ Scalar
if (bodyCycleSpeed > bodyTargetSpeed) bodyCycleSpeed = bodyTargetSpeed;
if (bodyCycleSpeed > reverseSpeedMax2) bodyCycleSpeed = reverseSpeedMax2;
}
if (peerMirrorSpeed >= 0.0f) // peer: cadence == actual mirrored ground speed
bodyCycleSpeed = (peerMirrorSpeed < reverseSpeedMax) ? reverseSpeedMax
: ((peerMirrorSpeed > reverseSpeedMax2) ? reverseSpeedMax2 : peerMirrorSpeed);
distance = bodyAnimation.Advance(
time_slice * (bodyCycleSpeed / reverseStrideLength) * globalTimeScale, loop);
break;