feat: normalize mirv - #5188
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… map edge benefit for mirv
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Included review availability: Your plan provides up to 8 included reviews per hour; 4 remain after this review. WalkthroughMIRV launch timing now uses deterministic speed derived from Bézier path lengths and configured normalization ticks. Parabola control points support optional map-bound bypassing. Fixed-point curve calculations support length measurement. Tests cover MIRV timing and trajectory cases. ChangesMIRV speed normalization
Estimated code review effort: 4 (Complex) | ~45 minutes Merge Risk: 🟡 Moderate · up to MIRV timing and geometry are being normalized, but the current implementation adds floating-point speed calculations to deterministic simulation and retains tests that may not reliably validate short flights or use the required setup. The PR should not merge until these concerns are fixed or explicitly accepted by the owner. Sequence Diagram(s)sequenceDiagram
participant MIRVExecution
participant Config
participant getParabolaControlPoints
participant DistanceBasedBezierCurve
participant ParabolaPathfinder
MIRVExecution->>Config: read mirvNormalizeTargetTicks()
MIRVExecution->>getParabolaControlPoints: generate actual control points
MIRVExecution->>DistanceBasedBezierCurve: calculate curve length
DistanceBasedBezierCurve-->>MIRVExecution: return length
MIRVExecution->>ParabolaPathfinder: initialize with deterministic speed
Suggested reviewers: Poem
🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
Full details: Linked Issues checkExplanation The changes address issue
✨ Finishing Touches 💡 1🛠️ Fix failing CI checks 💡
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Inline comments:
In `@src/core/utilities/Line.ts`:
- Around line 49-53: Replace floating-point MIRV speed calculations with
deterministic integer fixed-point arithmetic: in src/core/utilities/Line.ts
lines 49-53, update the segment-distance calculation to use an integer
square-root routine and return a scaled integer length; in
src/core/execution/MIRVExecution.ts lines 317-340, derive ideal ticks and
normalization from scaled integers using integer square root, eliminating
Math.sqrt and floating-point division at both sites.
In `@tests/core/utilities/Line.test.ts`:
- Around line 117-139: Update the getLength coverage around
DistanceBasedBezierCurve.getLength to run within a simulation test initialized
by the repository’s setup() helper from tests/util/Setup.ts, preserving both
curved and straight-line assertions. Do not use mocks; alternatively, document
an explicit exception only if this remains a pure utility test.
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src/core/configuration/Config.tssrc/core/execution/MIRVExecution.tssrc/core/pathfinding/PathFinder.Parabola.tssrc/core/utilities/Line.tstests/core/utilities/Line.test.tstests/nukes/HydrogenAndMirv.test.ts
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🤖 Claude Code ReviewVerdict: Approve with one suggestion — the math and determinism story check out, but the PR's core new behavior isn't actually covered by a test. Findings by severity: 0 Critical, 0 High, 1 Medium, 0 Low Medium
This method is the headline feature of the PR (normalizing MIRV flight time toward None of the tests touched by this PR exercise this behavior:
Per CLAUDE.md: "All Suggested fix: Add a test case with a genuinely long-range MIRV launch (large distance between silo and target, using the default/slow Note: floating-point usage ( |
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Inline comments:
In `@tests/nukes/HydrogenAndMirv.test.ts`:
- Around line 293-294: Strengthen the minWaitTicks assertions in the
HydrogenAndMirv test to require the configured short-flight duration, changing
the lower bound from greater than zero to at least seven ticks while retaining
the existing upper-bound check.
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tests/nukes/HydrogenAndMirv.test.ts
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🤖 Claude Code ReviewVerdict: Approve with one substantive finding — the normalization math is sound and well-tested, but the map-edge exploit this PR claims to fix is only partially closed. Findings by severity: 1 Medium, 0 High/Critical, 0 Low. No CLAUDE.md violations found (determinism, dependency, and test-coverage rules were all checked and are respected).
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Inline comments:
In `@src/core/execution/MIRVExecution.ts`:
- Around line 309-312: Update getParabolaControlPoints and
DistanceBasedBezierCurve.getLength to replace floating-point square-root and
fractional calculations with scaled integer arithmetic and an integer
square-root implementation, preserving MIRV speed behavior while making it
deterministic. Add focused tests covering deterministic MIRV speed calculation.
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src/core/execution/MIRVExecution.tssrc/core/pathfinding/PathFinder.Parabola.tstests/nukes/HydrogenAndMirv.test.ts
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1 participant
Add approved & assigned issue number here:
Resolves #5057
Description:
This PR normalizes mirv warhead speed, towards 14 ticks (editable in config). Various numbers and tweaks have been tested to make this feel as smooth as possible. Better MIRV shots from a better player will still provide clear benefits, but the variance and extremes have been vastly toned down.
Edited parabola / line logic to allow for 256 levels of subspeed. This is compliant because the curve uses 256x scaled bit logic - we just didn't take advantage of this before.
Eliminates map edge benefits for MIRV as well, this should be done for every nuke IMO but not within the scope.
Please complete the following:
Please put your Discord username so you can be contacted if a bug or regression is found:
JB940