fix(particle): support mixed ForceOverLifetime axis modes - #3101
fix(particle): support mixed ForceOverLifetime axis modes#3101luzhuang wants to merge 4 commits into
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No actionable comments were generated in the recent review. 🎉 ℹ️ Recent review info⚙️ Run configurationConfiguration used: Repository UI Review profile: CHILL Plan: Pro Plus Run ID: 📒 Files selected for processing (1)
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ChangesForce-over-lifetime shader data
Estimated code review effort: 3 (Moderate) | ~20 minutes Merge Risk: ⚪ Minimal · up to This change enables mixed ForceOverLifetime axis modes while preserving existing particle paths and contracts; focused and broader validation passed, so no actionable merge-blocking risk remains beyond normal checks and review. Poem
🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
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Codecov Report✅ All modified and coverable lines are covered by tests. Additional details and impacted files@@ Coverage Diff @@
## dev/2.0 #3101 +/- ##
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- Coverage 85.88% 85.77% -0.11%
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Files 811 811
Lines 94808 94765 -43
Branches 11592 11609 +17
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- Hits 81425 81288 -137
- Misses 13293 13385 +92
- Partials 90 92 +2
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GuoLei1990
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🫧 尘小沫
结论
已审查 dev/2.0 基线 490d2bc8ca1f1c187a995da3c913e59c56959a30 到目标 HEAD 6fd177131fa0c69eb1bda45b80c78b57ba01ea70 的完整 diff，并单独核对 215ea0f127562938cc3022b2bfb75b230fc1764f...6fd177131fa0c69eb1bda45b80c78b57ba01ea70 的增量测试提交。修复方向正确：常量、曲线与随机模式被归一投影到既有 FOL shader 契约，常规顶点与 Transform Feedback 两条消费路径保持一致。阻塞级别：无 P0/P1，存在 1 个 P2 ownership/测试治理问题，不阻塞合入。实际 review 动作：COMMENTED（未 APPROVE、未 REQUEST_CHANGES）。自动 CR 不替代人工 Reviewer 的合入门禁，仍需人工审核确认。
已关闭问题清单
- 无历史 actionable finding：GitHub reviews 与 inline comments 均为空；CodeRabbit 在本 HEAD 的增量审查也明确为 “No actionable comments”，因此没有已修复或作者解释成立的问题需要继承。
问题
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[P2] 将聚合随机模式收口为单一 owner，并覆盖实际粒子随机槽链路 —
packages/core/src/particle/modules/ForceOverLifetimeModule.ts:139,203-205、tests/src/core/particle/ForceOverLifetime.test.ts:38-94同一个“任一轴为
TwoConstants/TwoCurves即随机”的事实目前在_updateShaderData和_isRandomMode()中各实现一次：前者控制RENDERER_FOL_IS_RANDOM_TWO与 min/max uniform，后者被ParticleGenerator.ts:1063-1068消费以写入每粒子的a_Random2.xyz。这留下了两份需要同步的 mode owner。新增测试只直接调用_updateShaderData并检查 macro/uniform；若仅把_isRandomMode()退回旧判据，测试仍会全绿，但真实发射粒子不会获得新的随机因子，shader 会读到默认或复用槽中的旧值，混合随机轴仍会退化为固定/错误分布。保留
ForceOverLifetimeModule._isRandomMode()作为聚合随机模式的权威 owner，让第 139 行直接调用它并删除重复表达式；同时按现有SizeOverLifetime.test.ts:120-140的链路测试模式，通过公开配置与发射入口生成至少两个粒子，验证每个 42-float stride 的 38-40 槽位得到有效且不同的随机值（或补等价的可观察 e2e 断言）。这样 mode 判定、CPU slot 写入和 shader 消费任一处回退都会被反向证伪。
架构、熵增与测试治理
上游权威 owner 仍是三个 ParticleCompositeCurve：它们持有 mode/value 并通过既有 dispatcher 通知参数变化；ForceOverLifetimeModule 只负责把三轴事实投影为共享 shader macro/uniform。下游由 ParticleGenerator 唯一写入 a_Random2.xyz，常规 ParticleVert 与 ParticleFeedback 共同消费同一槽位和未变更的协议。
改动前是同模特判与两个 Vector3 cache；改动后删除了同模限制，新增六个按上传机械重算的 Float32Array scratch cache 和一个转换 helper，没有新增 macro、协议、状态机、legacy/compat 分支或第三份持久真相。scratch cache 避免热路径分配，归属合理。当前剩余熵增点仅是聚合随机判据仍双写，以及新增测试只守住 shader-data 投影、未守住实际 slot 写入，已在上方 finding 给出 owner 收口和删除方向。未发现为旧测试保留生产兼容逻辑，也没有需要删除的旧 fixture/mock/snapshot。
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已采纳并直接收掉 P2，提交 85d6b61：聚合随机判定现在只由 ForceOverLifetimeModule._isRandomMode() 持有，shader macro/uniform 与 ParticleGenerator 的 a_Random2.xyz 写入共享同一 owner；新增真实发射 2 个粒子的 Chromium 行为测试，验证 mixed-axis TwoConstants 会为每个 42-float stride 的 38-40 槽写入有效且不同的随机值。focused 2/2、完整 particle suite 16 files / 173 tests、ESLint/Prettier/diff-check 通过。PR body 已同步，未合并、未开启 auto-merge。 |
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Actionable comments posted: 1
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Inline comments:
In `@tests/src/core/particle/ForceOverLifetime.test.ts`:
- Line 31: Update the test setup around the performance.now override to save the
original function, perform the manual clock updates, and restore it in a finally
block so subsequent tests use the real global clock.
🪄 Autofix
Fix all unresolved CodeRabbit comments on this PR:
- Push a commit to this branch (recommended)
- Create a new PR with the fixes
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⚙️ Run configuration
Configuration used: Repository UI
Review profile: CHILL
Plan: Pro Plus
Run ID: 92078ee0-2a9f-424c-af76-1dfb855405b9
📒 Files selected for processing (2)
packages/core/src/particle/modules/ForceOverLifetimeModule.tstests/src/core/particle/ForceOverLifetime.test.ts
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luzhuang
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最新 head 8856edd 独立复审通过，无 P0/P1/P2 finding。mixed-axis mode 由 ForceOverLifetimeModule._isRandomMode 单一 owner 同时驱动 shader macro/uniform 与 ParticleGenerator a_Random2.xyz；CPU stride 42 offsets 38-40 与常规/transform-feedback 两条 shader layout 均一致。新增测试穿过 WebGLEngine/Burst/play/update/particle emission 真实链路，并在 finally 恢复 performance.now。主线程 focused 2/2、particle suite 16 files / 173 tests 通过；当前 CI lint、三平台 build、4/4 E2E、Codecov 全绿，patch coverage 100%。未合并，也未启用自动合并。
GuoLei1990
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GuoLei1990
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🫧 尘小沫
结论
已完成 dev/2.0 基线 490d2bc8ca1f1c187a995da3c913e59c56959a30 到目标 HEAD 8856edd8bbf696a21ff9d89e3f4bca56fe832177 的完整复审，并重点核对上一轮 6fd177131fa0c69eb1bda45b80c78b57ba01ea70 之后的两个增量提交 85d6b611769eca4c21ce476d4ea2a45189a4411f、8856edd8bbf696a21ff9d89e3f4bca56fe832177。上一轮 P2 与随后提出的测试时钟清理意见均已闭环；本轮未发现新的 P0/P1/P2 actionable finding。阻塞级别：无。实际 review 动作：COMMENTED（未 APPROVE、未 REQUEST_CHANGES），目标 HEAD 为 8856edd8bbf696a21ff9d89e3f4bca56fe832177。自动 CR 不替代人工 Reviewer 的合入门禁，仍需人工审核确认。
GitHub CI 的 lint、三平台 build、4/4 E2E、主 codecov job 与 codecov/patch 均通过；独立 codecov/project 因全局覆盖率从 85.88% 降至 85.77% 仍显示 failure，但报告同时确认本 PR 所有修改且可覆盖行均已覆盖，因此本轮未将该全局阈值信号判为代码问题。
已关闭问题清单
- 聚合随机模式存在双 owner，且测试未覆盖真实随机槽写入 — 已由
85d6b611769eca4c21ce476d4ea2a45189a4411f修复：ForceOverLifetimeModule._isRandomMode()现在是跨轴随机判定的单一 owner，_updateShaderData与ParticleGenerator的发射写入共同消费它；新增行为测试经 Burst / play / update 真实链路发射两个粒子，并验证每个 42-float stride 的 38–40 槽均写入有效且不同的随机因子。上一轮 P2 已关闭。 - 测试覆盖全局
performance.now后未恢复 — 已由8856edd8bbf696a21ff9d89e3f4bca56fe832177修复：改用vi.spyOn(performance, "now")，并在finally中执行mockRestore()；当前代码与 CodeRabbit 后续确认一致，意见已关闭。
架构、熵增与测试治理
上游事实仍由三个 ParticleCompositeCurve 分别持有 mode/value 并通过既有 dispatcher 通知变化；ForceOverLifetimeModule._isRandomMode() 只聚合“任一轴随机”这一跨轴事实，_updateShaderData 将它机械投影为既有 FOL macro/uniform。下游由 ParticleGenerator 在发射时唯一写入 a_Random2.xyz：ParticleBufferUtils 在普通 instance 与 Transform Feedback 两套绑定中都把 Random2 固定在 byte 152，168-byte stride 对应 float 38–41；FOL 使用 xyz，LVL 保留 w。常规 ForceOverLifetime.glsl 的解析积分路径和 ParticleFeedback.shader 的逐帧加速度路径继续消费相同 macro、uniform 与随机分量；bounds 仍从三个 composite curve 独立推导，没有出现协议漂移。
相对基线，改动新增六个 8-float scratch buffer 与一个私有 lowering helper，用来在共享 curve shader 路径中把 Constant/TwoConstants 机械编码为平坦曲线。由于 ShaderData 直接保存 Float32Array 引用，X/Y/Z 的 min/max uniform 需要稳定且互不别名的缓冲；这些数组每次上传都由上游事实重算，不是第三份持久真相。相对上一轮 HEAD，聚合随机判据从两处表达式收口为一个 owner。整个 PR 没有新增 macro、instance layout、状态机、校验路径、legacy/compat 分支或 fallback，也没有把复杂度转移到上下游。
测试治理上，原有 shader-data 投影断言继续覆盖 constant/curve/random 的关键混合组合，新增真实发射测试补齐 CPU slot 写入链路，时钟 mock 在 finally 中清理；未发现为旧测试保留生产兼容逻辑，也没有失效 fixture、mock 或 snapshot 需要删除。
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Summary\n\nFixes #2796\n\n## Root cause\n\nForceOverLifetimeModule required all three axes to use the same curve or random mode. A mixed setup such as X=TwoConstants and Y/Z=Constant therefore fell back to the constant max-only path, and ParticleGenerator did not allocate the per-particle random values.\n\n## Minimal fix\n\n- Select curve mode when any axis uses Curve or TwoCurves, and random mode when any axis uses TwoConstants or TwoCurves.\n- Encode constant and TwoConstants axes as cached flat min/max curves when the shared curve path is active.\n- Upload identical min and max values for non-random axes, preserving their constant direction while other axes vary.\n- Keep the existing shader macro and uniform contract for both the regular particle vertex path and transform-feedback path.\n\n## Validation\n\n- Chromium focused test: tests/src/core/particle/ForceOverLifetime.test.ts, 2/2 passed, including real per-particle a_Random2.xyz slot writes for mixed-axis random mode.\n- Chromium particle suite: 16 files, 173 tests passed.\n- pnpm b:module passed.\n- pnpm b:types passed.\n- pnpm --filter @galacean/engine-core run b:types passed.\n- pnpm lint passed with 0 errors; only existing repository warnings remain.\n- Prettier check passed.
Summary by CodeRabbit
New Features
Bug Fixes