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Evan
f4db4a33c8
## Summary Follow-up to #4244's payload work: nukes were the last per-tick movers flooding the worker → main update stream. - **Core**: nuke trajectories are fully determined at launch (precomputed parabola), so `NukeExecution` now records a `GridPathPlan` when the nuke is built — same mechanism trade ships use — and the client derives the position each tick. Per-tick `UnitUpdate`s for nukes in flight are suppressed; only targetable flips and deletion (interception/detonation) still emit. This covers atom bombs, hydrogen bombs, and MIRV warheads (dozens of per-tick movers per MIRV separation). - The plan path replays a separate pathfinder rather than reusing the stored trajectory array: the curve's cached points don't advance exactly one index per tick, and the plan must match the movement pathfinder's exact per-tick tile sequence. - `startTick` accounts for MIRV warheads' staggered `waitTicks`. - **Render**: `UnitPass.drawMissiles` now lerps each nuke's instance position `lastPos→pos` by wall-clock progress through the current tick, so nukes glide along their arc at render framerate instead of jumping once per 100ms tick. Both endpoints are real simulated positions — the rendered nuke trails the sim by at most one tick and settles exactly on it when ticks stop. Plan-driven units sync `lastPos` on path-stall ticks so the lerp never replays a segment. Shells keep their existing two-instance trail; SAM missiles are unchanged. ## Test plan - New `tests/nukes/NukeMotionPlan.test.ts`: tick-exact alignment between the recorded plan and core nuke position over the whole flight (mirroring `GameView.advanceMotionPlannedUnits` math), `waitTicks` offset, and that no per-tick unit updates are emitted in flight except targetable flips and deletion. - Full suite passes (1452 + 65), tsc/eslint/prettier clean. - Verified in-game (headless Chromium, real WebGL): atom bomb arcs from silo to target with the client position driven by the plan, missile sprite renders intact while the smoothing rewrites the instance buffer every frame, detonation FX land at the target. 🤖 Generated with [Claude Code](https://claude.com/claude-code) --------- Co-authored-by: Claude Fable 5 <noreply@anthropic.com>