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ManoeuvreTrack forgets a whole window after the last change of vector; tests stop resetting it, and pin the three fixes

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Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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Meta Vens 2026-10-07 05:39:41 +02:00
commit 522b5af0b4
2 changed files with 85 additions and 2 deletions
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18
Assets/Scripts/ServerShared/FireControl.cs
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@ -1980,15 +1980,33 @@ public readonly struct ManoeuvreEnvelope
// exponential average of the acceleration, the innovation is what departs from it (low-passed at a quarter of the
// window), and the moments are the exponential average of that innovation's outer product. A steady burn and
// coasting have no innovation; a weave at the window's scale does; dithering much faster than the window averages out.
// A change of vector is an acceleration that differs from the last observation's by more than ChangeThreshold. When
// none has happened for a whole window the unpredictability is over: the track forgets it outright (the moments
// return to exactly zero and the trend settles on the steady acceleration), so a ship that stops jinking stops
// evading within the window and the zero-spread early return is reachable again.
public struct ManoeuvreTrack
{
public const float ChangeThreshold = 0.01f;
public float2 Trend;
public float2 Innovation;
public float3 Moments;
public float2 Last;
public float Quiet;
public void Observe(float2 acceleration, float dt, float window)
{
if (dt <= 0f || window <= 0f) return;
var changed = abs(acceleration.x - Last.x) > ChangeThreshold || abs(acceleration.y - Last.y) > ChangeThreshold;
Quiet = changed ? 0f : Quiet + dt;
Last = acceleration;
if (Quiet >= window)
{
Trend = acceleration;
Innovation = float2(0, 0);
Moments = float3(0, 0, 0);
return;
}
var k = 1f - exp(-dt / window);
var k4 = 1f - exp(-4f * dt / window);
Trend += k * (acceleration - Trend);