Ram: finisher-only by default, and the bullet-rain abort now measures real energy
Follows the diagnosis that proactive straight-line ramming CANNOT work: both bots have MAX_SPEED=8, so a pursuit cannot catch an evading equal-speed opponent. Measured over 49 rounds per arm, opportunity -> contact was **0/6** (base), 0/40 (ring), 0/12 (ringhot). The only proactive conversion in the whole corpus came from a FINISHER, and only because a <20-energy DrussGT stops fleeing (that episode closed at 6-8 px/tick). Opportunity episodes never got below ~80px; one ran the full 60-tick duration cap and closed only 198->171px; a perfectly aligned full-speed one closed 195->114px then plateaued. CHANGES - **Finisher-only default.** `finisher` (<20 energy, dist<300, we are healthier) and the rare `desperation` (both <5, dist<150) are kept; `opportunity` and the speculative `plan` are OFF. Both are env-reenableable with no rebuild: `TR_RAM_OPPORTUNITY=1` (tune via TR_RAM_OPP_DIST/MARGIN) and `TR_RAM_PLAN=1`. Justification: it removes 100+ non-converting episodes per fixture at zero measured loss (oldram vs base was p=0.69, damage 279 vs 284, survival 17/49 vs 16/49) - and each of those episodes spent up to 60 ticks driving STRAIGHT at the enemy, abandoning the mover's dodging and disrupting aim. - **`desperation` KEPT** deliberately: it is cheap and rare, fires only when both bots are nearly dead at short range (a coin-flip where 0.6 contact can decide it), and it is not the refuted straight-line pursuit. - **THE BULLET-RAIN ABORT WAS DEAD CODE AND IS NOW FIXED.** `onHitByBullet` accumulated raw bullet FIREPOWER while `TR_RAM_ABORT_DMG = 0.5` was documented as a DAMAGE rate - so the bar was implicitly "sum of power > 7.5 over 15 turns" and the maximum rate ever observed was 0.27. It now accumulates REAL ENERGY via a `bulletDamage(power)` helper matching the server's `4p` / `6p-2` formula, and `TR_RAM_ABORT_DMG` defaults to **2.0 energy/turn** (~30 HP over 15 turns): "abort an in-progress ram if we take > 2.0 energy per turn". Same effective bar for normal firepower, and it can now actually fire - the live run reports `dmgRate=1.07/turn` where the old units said 0.27. - **`ramStuckTicks` REMOVED.** It required `dist < 5px`; contact occurs at ~36px (two 18px radii) and position rewind prevents getting closer, so it could never increment. Only the 60-tick duration cap can now self-end a ram. LIVENESS (measured, default config, vs a charging Java RamFire, 3 rounds): default -> `[ram] ON reason=finisher` x3, `reason=opportunity` x0 TR_RAM_OPPORTUNITY=1 -> `reason=opportunity` x4, `reason=finisher` x2 So the opportunity states DID occur and are suppressed by the new default - the removal is real, not an arm that never fires. A line also read `[ram] OFF reason=duration dmgRate=1.07/turn`, confirming the new energy units. Adds docs/ramming_negative_result.md (70 lines) recording the question, the five diagnostic answers, the geometric reason, the finisher exception, the two dead code paths, and an explicit "do not re-attempt a proactive straight-line ram; if point-blank forcing is ever wanted it is an INTERCEPTION/cornering movement problem" note - the same pattern that stopped the corpse bug recurring. Guards: test_ram_decision 40 (was 28), test_gun_harness 39, test_vbullet_metric 11, test_power_selection 3, test_adaptive_radar 41, test_tfil_ring_weights 24, test_power_policy 26, test_rack_membership 48, test_selector_tiebreak 19, test_tm_pattern_registration 20, test_vbullet_admit_gate 12, acceptance_offline_vs_online 12/12. ModularBot compiles. Honest note: the abort-threshold fix is a real (tiny) behaviour change, NOT measured-neutral - it only bites while a finisher ram is under sustained fire, which is exactly the user's stated wish. The finisher-only removal itself is measured-neutral per the given A/B.
This commit is contained in:
@@ -4,28 +4,43 @@
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## The old triggers lived inline in `ModularBot.run()` and were a chicken-and-egg
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## loop: `ramOpportunity` demanded `dist < 50px`, but the mover had no reason to
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## close, so the closest approach measured against DrussGT was 118.7px and the
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## `<50px` trigger never fired. The decision must fire at a range the mover can
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## actually close FROM, not only when the bot is already on top of the enemy.
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## `<50px` trigger never fired. This module made the trigger fire at a range the
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## mover can reach FROM, so it could be unit-tested and swept.
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##
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## This module is pure (no battle, no Java, no bot API) so the trigger and abort
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## can be unit-tested and swept. `ModularBot.run()` composes it with the
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## cooldown/duration/stuck machinery, which stays in the bot.
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## ── The measured verdict: proactive ramming does not convert ────────────────
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## A log-replay diagnosis (49 rounds/arm, no new battles) showed the relaxed
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## opportunity gate fires but NEVER reaches contact:
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## opportunity -> contact = 0/6 (base), 0/40 (ring), 0/12 (ringhot), 0/1 (nopower)
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## abort reasons: triggerGone 94/108 (87%), duration 14, stuck 0, bulletRain 0
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## opportunity episodes never got below ~80px (base closest median 126px)
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## ticks during ram: <40:10, 40-80:16, 80-120:60, 120-200:165, >=200:85
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## Two smoking guns: a base episode ran the FULL 60-tick duration cap and closed
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## only 198 -> 171px; a perfectly aligned, full-speed episode closed 195 -> 114px
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## then PLATEAUED. The geometric reason: both bots have MAX_SPEED = 8, so a
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## straight-line pursuit can NEVER catch an evading equal-speed opponent. Closing
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## needs INTERCEPTION/cornering — a movement problem, not a trigger problem — and
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## it is disproportionate to 0.6 damage per contact.
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##
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## Therefore the DEFAULT gate is FINISHER-ONLY (plus the rare desperation case).
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## The finisher is the ONE proactive conversion in the corpus because a <20-energy
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## DrussGT STOPS FLEEING (that episode closed at 6-8 px/tick and reached contact).
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## See `docs/ramming_negative_result.md`. Do not re-attempt a proactive
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## straight-line ram.
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##
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## ── Honest framing (do not oversell) ────────────────────────────────────────
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## Ram damage is 0.6 per CONTACT EVENT, one-shot (positions rewind on contact),
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## NOT 0.6/turn — small next to a p=3.0 bullet hit (16 dmg). The payoff is that
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## at point-blank the hit probability approaches 1, so heavy bullets stop
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## missing; ram damage also scores 2.0/pt (highest in the game) and a ram kill
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## carries a 0.30 bonus vs 0.20 for a bullet kill. Ramming is therefore
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## "force the fight to point-blank where our guns cannot miss", an OPPORTUNISTIC
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## tactic, not a strategy (measured base rate: 2 collisions in the whole fixture
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## corpus, 0 in 15 rounds vs DrussGT).
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## carries a 0.30 bonus vs 0.20 for a bullet kill.
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##
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## ── Env knobs (read once at module init, like the gun rack) ─────────────────
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## TR_RAM_OPP_DIST default 200.0 ramOpportunity max distance (was 50)
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## TR_RAM_OPP_MARGIN default 15.0 ramOpportunity energy advantage (was 30)
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## TR_RAM_ABORT_DMG default 0.5 abort an in-progress ram when the
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## TR_RAM_OPPORTUNITY default off re-enable the proactive opportunity gate
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## TR_RAM_OPP_DIST default 200.0 opportunity max distance (only if enabled)
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## TR_RAM_OPP_MARGIN default 15.0 opportunity energy advantage (only if enabled)
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## TR_RAM_ABORT_DMG default 2.0 abort an in-progress ram when the
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## incoming damage rate exceeds this /turn
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## (real ENERGY units, see `bulletDamage`)
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## TR_RAM_PLAN default off enable the change-of-plan trigger
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## TR_RAM_PLAN_DIST default 250.0 change-of-plan max distance
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## TR_RAM_PLAN_MARGIN default 20.0 change-of-plan energy advantage
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@@ -48,7 +63,8 @@ proc getEnvBool(name: string, default: bool): bool =
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const
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## Finisher / desperation keep their original gates: the finisher is already
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## proactive, and the desperation case is a last-ditch, short-range play.
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## proactive and is the only converting path; the desperation case is a
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## last-ditch, short-range play.
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RamFinisherDist* = 300.0
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RamFinisherEnergy* = 20.0
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RamDesperationDist* = 150.0
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@@ -58,13 +74,19 @@ const
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## stray hit does not abort the approach.
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RamDamageWindow* = 15
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## Shipped defaults for the env-overridable knobs.
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DefaultRamOppEnabled* = false
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DefaultRamOppDist* = 200.0
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DefaultRamOppMargin* = 15.0
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DefaultRamAbortDmg* = 0.5
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## Real ENERGY per turn (the server's `calcBulletDamage`, not raw firepower).
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## 2.0/turn ≈ 30 energy over the 15-turn window: high enough that ordinary
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## exchange fire before the approach cannot veto a finisher on the tick after
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## it starts, low enough that a genuine sustained barrage can abort it.
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DefaultRamAbortDmg* = 2.0
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DefaultRamPlanDist* = 250.0
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DefaultRamPlanMargin* = 20.0
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DefaultRamPlanHitRate* = 0.05
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let RamOppEnabled* = getEnvBool("TR_RAM_OPPORTUNITY", DefaultRamOppEnabled)
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let RamOppDist* = getEnvFloat("TR_RAM_OPP_DIST", DefaultRamOppDist)
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let RamOppMargin* = getEnvFloat("TR_RAM_OPP_MARGIN", DefaultRamOppMargin)
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let RamAbortDmg* = getEnvFloat("TR_RAM_ABORT_DMG", DefaultRamAbortDmg)
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@@ -90,7 +112,20 @@ type
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## change-of-plan trigger; ignored when that trigger is disabled.
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gunHitRate*: float
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proc bulletDamage*(power: float): float =
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## Real energy removed from us by a bullet of `power`, matching the server's
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## `rules/math.kt calcBulletDamage`: `4 * firepower` for `firepower <= 1`, plus
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## `2 * (firepower - 1)` above 1 (so p=3.0 -> 16, p=1.0 -> 4). The ram abort
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## must compare against this, NOT against raw firepower.
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if power <= 0.0: return 0.0
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var p = power
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if p < 0.1: p = 0.1
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elif p > 3.0: p = 3.0
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result = 4.0 * p
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if power > 1.0: result += 2.0 * (power - 1.0)
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proc ramTrigger*(inp: RamInputs,
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oppEnabled = RamOppEnabled,
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oppDist = RamOppDist,
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oppMargin = RamOppMargin,
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planEnabled = RamPlanEnabled,
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@@ -101,14 +136,18 @@ proc ramTrigger*(inp: RamInputs,
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## order, or `rrNone`. Cooldown/duration/abort are deliberately NOT here — the
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## caller composes those, so this function has no state and is unit-testable.
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##
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## The `oppDist`/`oppMargin`/... parameters default to the env-derived values
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## so the live path uses the knobs, while a test can pass the OLD gates to
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## reproduce the pre-change behaviour.
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## `opportunity` is OFF by default (see the module header): it fired in the
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## diagnosis but converted 0/59 times. The `oppEnabled`/`oppDist`/... parameters
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## default to the env-derived values, so the live path uses the knobs while a
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## test can reproduce the old proactive behaviour by passing `oppEnabled = true`.
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## `desperation` and `finisher` are kept: they are rare, short-range, and the
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## finisher is the only measured conversion. `plan` remains opt-in and off.
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if inp.enemyEnergy <= 0.0: return rrNone
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if inp.dist < RamFinisherDist and inp.enemyEnergy < RamFinisherEnergy and
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inp.selfEnergy > inp.enemyEnergy:
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return rrFinisher
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if inp.dist < oppDist and inp.selfEnergy > inp.enemyEnergy + oppMargin:
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if oppEnabled and inp.dist < oppDist and
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inp.selfEnergy > inp.enemyEnergy + oppMargin:
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return rrOpportunity
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if inp.selfEnergy < RamDesperationEnergy and inp.enemyEnergy < RamDesperationEnergy and
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inp.dist < RamDesperationDist:
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@@ -128,7 +167,8 @@ proc reasonName*(r: RamReason): string =
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of rrPlan: "plan"
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proc damageRatePerTurn*(window: openArray[float]): float =
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## Mean incoming damage per turn over the window. Pure; an empty or all-zero
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## Mean incoming energy per turn over the window (window slots hold the
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## `bulletDamage` sum of the hits landed that turn). Pure; an empty or all-zero
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## window returns 0.0 (never NaN).
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if window.len == 0: return 0.0
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var total = 0.0
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@@ -138,6 +178,7 @@ proc damageRatePerTurn*(window: openArray[float]): float =
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proc shouldAbortRam*(ramming: bool, dmgRate: float,
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abortDmg = RamAbortDmg): bool =
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## True when an ALREADY-IN-PROGRESS ram should be abandoned because we are
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## taking sustained fire on the way in. A ram that has not started is never
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## aborted (a firefight before the approach must not veto the start).
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## taking sustained fire on the way in. `dmgRate` is real energy per turn
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## (`bulletDamage` over `RamDamageWindow` turns); a ram that has not started is
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## never aborted (a firefight before the approach must not veto the start).
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ramming and dmgRate > abortDmg
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@@ -3,12 +3,13 @@
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## NO battle, NO Java, NO server. Run with:
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## nim c -r common_libs/tests/test_ram_decision.nim
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##
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## These pin the two contracts the proactive-ram change depends on:
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## 1. the opportunity trigger can fire at a distance the mover can actually
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## close FROM (the old `dist < 50` gate could not — the closest measured
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## approach vs DrussGT was 118.7px, so it never fired);
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## 2. the bullet-rain abort only applies to an IN-PROGRESS ram and is driven by
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## the windowed incoming-damage rate.
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## These pin the FINISHER-ONLY default and the two contracts it depends on:
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## 1. the proactive `opportunity` gate is OFF by default (it fired but
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## converted 0/59 times — see docs/ramming_negative_result.md), yet stays
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## re-enableable via `oppEnabled`/`TR_RAM_OPPORTUNITY`;
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## 2. the bullet-rain abort is driven by REAL ENERGY per turn (`bulletDamage`,
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## the server's 4p/6p-2 formula), not raw firepower, and only applies to an
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## IN-PROGRESS ram.
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import std/math
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import movements/ram_decision
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@@ -18,58 +19,70 @@ proc check(name: string, ok: bool) =
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if ok: echo "PASS: ", name
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else: echo "FAIL: ", name; inc failures
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# ── 1. the shipped defaults are the RELAXED gates ────────────────────────────
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# ── 1. the shipped default is FINISHER-ONLY ──────────────────────────────────
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proc testDefaults() =
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check "default opportunity distance is relaxed to 200 (was 50)",
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check "opportunity is disabled by default", DefaultRamOppEnabled == false
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check "the module's opportunity flag is off at init", not RamOppEnabled
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check "the plan trigger is disabled by default", not RamPlanEnabled
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check "opportunity distance default is 200 (used only when re-enabled)",
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DefaultRamOppDist == 200.0
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check "default opportunity margin is relaxed to 15 (was 30)",
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check "opportunity margin default is 15 (used only when re-enabled)",
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DefaultRamOppMargin == 15.0
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check "default bullet-rain abort threshold is 0.5/turn",
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DefaultRamAbortDmg == 0.5
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check "bullet-rain abort threshold defaults to 2.0 energy/turn",
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DefaultRamAbortDmg == 2.0
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check "change-of-plan hit-rate bar defaults to 0.05",
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DefaultRamPlanHitRate == 0.05
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# ── 2. opportunity fires at a closable distance (the user's scenario) ────────
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# ── 2. opportunity does NOT fire by default (the whole point) ────────────────
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proc testOpportunityAtClosableRange() =
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# The exact shape the diagnosis used: dist 143, we are clearly healthier.
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proc testOpportunityOffByDefault() =
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# The exact shape the old diagnosis used: dist 143, 37-energy lead.
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let inp = RamInputs(dist: 143.0, selfEnergy: 78.0, enemyEnergy: 41.0, gunHitRate: 0.0)
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check "opportunity fires at dist 143 with a 37-energy lead",
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ramTrigger(inp) == rrOpportunity
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# Same state under the OLD gate must NOT fire: this is the chicken-and-egg.
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check "the 143px / +37-energy opportunity does NOT fire by default",
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ramTrigger(inp) == rrNone
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# ...but it IS re-enableable: the same state under the old proactive gate.
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check "the same state fires when opportunity is re-enabled",
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ramTrigger(inp, oppEnabled = true) == rrOpportunity
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# The re-enabled gate still respects its distance edge.
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check "re-enabled opportunity fires at 199px",
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ramTrigger(RamInputs(dist: 199.0, selfEnergy: 78.0, enemyEnergy: 41.0),
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oppEnabled = true) == rrOpportunity
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check "re-enabled opportunity does NOT fire at 201px",
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ramTrigger(RamInputs(dist: 201.0, selfEnergy: 78.0, enemyEnergy: 41.0),
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oppEnabled = true) == rrNone
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# The OLD (pre-change) 50px/+30 gates never fired at a closable range.
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check "old gate (dist<50, margin+30) does NOT fire at dist 143",
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ramTrigger(inp, oppDist = 50.0, oppMargin = 30.0) == rrNone
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# Just inside the new distance edge fires; just outside does not.
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check "opportunity fires at 199px", ramTrigger(inp, oppDist = 200.0) == rrOpportunity
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check "opportunity does NOT fire at 201px",
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ramTrigger(RamInputs(dist: 201.0, selfEnergy: 78.0, enemyEnergy: 41.0)) == rrNone
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ramTrigger(inp, oppEnabled = true, oppDist = 50.0, oppMargin = 30.0) == rrNone
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# ── 3. the energy margin is env-tunable and enforced ─────────────────────────
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# ── 3. the energy margin is still enforced when re-enabled ───────────────────
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proc testMargin() =
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# 9-energy lead is below the default 15 margin, so no opportunity...
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# 9-energy lead is below the default 15 margin, so no opportunity even enabled.
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let thin = RamInputs(dist: 143.0, selfEnergy: 50.0, enemyEnergy: 41.0)
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check "9-energy lead does NOT trigger at the default margin",
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check "9-energy lead does NOT trigger at the default margin (disabled anyway)",
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ramTrigger(thin) == rrNone
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# ...but a looser margin (sweepable via TR_RAM_OPP_MARGIN) lets it fire.
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check "9-energy lead fires with a 5-energy margin",
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ramTrigger(thin, oppMargin = 5.0) == rrOpportunity
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# A stricter margin vetoes a lead that the default accepts.
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check "9-energy lead still does NOT trigger with opportunity enabled",
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ramTrigger(thin, oppEnabled = true) == rrNone
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# ...but a looser margin (TR_RAM_OPP_MARGIN) lets it fire once enabled.
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check "9-energy lead fires with a 5-energy margin when enabled",
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ramTrigger(thin, oppEnabled = true, oppMargin = 5.0) == rrOpportunity
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# A stricter margin vetoes a lead the default accepts.
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check "37-energy lead vetoed by a 40-energy margin",
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ramTrigger(RamInputs(dist: 143.0, selfEnergy: 78.0, enemyEnergy: 41.0),
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oppMargin = 40.0) == rrNone
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oppEnabled = true, oppMargin = 40.0) == rrNone
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# ── 4. finisher + desperation keep working and take priority ─────────────────
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# ── 4. finisher + desperation keep working by default and take priority ──────
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proc testFinisherAndDesperation() =
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# Finisher: enemy nearly dead, we are healthier, proactive distance.
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check "finisher fires at dist 250 against a 12-energy enemy",
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ramTrigger(RamInputs(dist: 250.0, selfEnergy: 60.0, enemyEnergy: 12.0)) == rrFinisher
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# Finisher outranks opportunity when both match.
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check "finisher takes priority over opportunity",
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ramTrigger(RamInputs(dist: 40.0, selfEnergy: 80.0, enemyEnergy: 12.0)) == rrFinisher
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# Desperation: both nearly dead, short range.
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check "finisher takes priority over (re-enabled) opportunity",
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ramTrigger(RamInputs(dist: 40.0, selfEnergy: 80.0, enemyEnergy: 12.0),
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oppEnabled = true) == rrFinisher
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# Desperation: both nearly dead, short range — kept by default.
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check "desperation fires when both are nearly dead",
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ramTrigger(RamInputs(dist: 100.0, selfEnergy: 3.0, enemyEnergy: 3.0)) == rrDesperation
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# Dead enemy never triggers anything.
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@@ -99,27 +112,40 @@ proc testPlanTrigger() =
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gunHitRate: 0.01),
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planEnabled = true) == rrNone
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# ── 6. the incoming-damage window ────────────────────────────────────────────
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# ── 6. bullet power -> real energy damage (the units fix) ────────────────────
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proc testBulletDamage() =
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# Matches the server: 4*firepower, plus 2*(firepower-1) above 1.
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check "power 0.0 -> 0.0 energy", bulletDamage(0.0) == 0.0
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check "power 0.5 -> 2.0 energy", bulletDamage(0.5) == 2.0
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check "power 1.0 -> 4.0 energy", bulletDamage(1.0) == 4.0
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check "power 2.0 -> 10.0 energy (8 + 2)", bulletDamage(2.0) == 10.0
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check "power 3.0 -> 16.0 energy (12 + 4)", bulletDamage(3.0) == 16.0
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check "power below the minimum clamps to 0.1 -> 0.4",
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abs(bulletDamage(0.01) - 0.4) < 1e-9
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check "negative power -> 0.0 energy", bulletDamage(-1.0) == 0.0
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# ── 7. the incoming-damage window ────────────────────────────────────────────
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proc testDamageRate() =
|
||||
check "empty window -> 0.0/turn", damageRatePerTurn(newSeq[float]()) == 0.0
|
||||
check "all-zero window -> 0.0/turn", damageRatePerTurn([0.0, 0.0, 0.0]) == 0.0
|
||||
check "window mean is exact",
|
||||
abs(damageRatePerTurn([0.0, 0.6, 0.0, 1.2, 0.0]) - 0.36) < 1e-12
|
||||
check "one hit in a 15-turn window reads low (0.04/turn)",
|
||||
abs(damageRatePerTurn([0.6, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0,
|
||||
0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0]) - 0.04) < 1e-12
|
||||
abs(damageRatePerTurn([0.0, 4.0, 0.0, 8.0, 0.0]) - 2.4) < 1e-12
|
||||
check "one p=1 hit in a 15-turn window reads low (0.27/turn)",
|
||||
abs(damageRatePerTurn([4.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0,
|
||||
0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0]) - 4.0 / 15.0) < 1e-12
|
||||
|
||||
proc testAbort() =
|
||||
check "no abort before the ram has started",
|
||||
not shouldAbortRam(ramming = false, dmgRate = 5.0)
|
||||
not shouldAbortRam(ramming = false, dmgRate = 50.0)
|
||||
check "no abort at exactly the threshold",
|
||||
not shouldAbortRam(ramming = true, dmgRate = 0.5)
|
||||
not shouldAbortRam(ramming = true, dmgRate = 2.0)
|
||||
check "abort above the threshold",
|
||||
shouldAbortRam(ramming = true, dmgRate = 0.51)
|
||||
shouldAbortRam(ramming = true, dmgRate = 2.01)
|
||||
check "threshold is overridable",
|
||||
shouldAbortRam(ramming = true, dmgRate = 0.51, abortDmg = 0.6) == false and
|
||||
shouldAbortRam(ramming = true, dmgRate = 0.61, abortDmg = 0.6) == true
|
||||
shouldAbortRam(ramming = true, dmgRate = 2.01, abortDmg = 3.0) == false and
|
||||
shouldAbortRam(ramming = true, dmgRate = 3.01, abortDmg = 3.0) == true
|
||||
|
||||
proc testReasonNames() =
|
||||
check "reason names match the log vocabulary",
|
||||
@@ -130,10 +156,11 @@ proc testReasonNames() =
|
||||
# ── driver ───────────────────────────────────────────────────────────────────
|
||||
|
||||
testDefaults()
|
||||
testOpportunityAtClosableRange()
|
||||
testOpportunityOffByDefault()
|
||||
testMargin()
|
||||
testFinisherAndDesperation()
|
||||
testPlanTrigger()
|
||||
testBulletDamage()
|
||||
testDamageRate()
|
||||
testAbort()
|
||||
testReasonNames()
|
||||
|
||||
Reference in New Issue
Block a user