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Included review availability: This review used your included allowance. Your plan provides up to 8 included reviews per hour; 7 remain after this review. WalkthroughThis change updates physics material defaults and shape assignment, adds rigid-collider shape replacement, and changes mesh-shape recreation. Character controllers now validate supported shapes and contact offsets. Physics tests use a shared PhysX setup helper. ChangesPhysics shape and material lifecycle
Priority: ➖ Normal Estimated code review effort: 4 (Complex) | ~45 minutes Change: Bug fix Sequence Diagram(s)sequenceDiagram
participant MeshColliderShape
participant PhysXPhysics
participant PhysXMeshColliderShape
participant RigidCollider
MeshColliderShape->>PhysXPhysics: create mesh shape with mesh data and world scale
PhysXPhysics->>PhysXMeshColliderShape: cook mesh and create native shape
PhysXMeshColliderShape-->>PhysXPhysics: return native shape or null
PhysXPhysics-->>MeshColliderShape: return replacement shape
MeshColliderShape->>RigidCollider: replace attached native shape
Suggested reviewers: Merge Risk: 🔵 Low · up to The change looks mergeable. The one open concern is that a mesh-replacement attachment-failure test may pass even when no error is thrown. A small assertion added to that test would close it. Security Architecture ReviewSecurity architecture risk: 🟡 Moderate · up to Mesh replacement is designed to preserve the existing collider when cooking or attachment fails, but one candidate-creation failure path may leave native resources without an owner. The circumstances needed to trigger that path, and its security exposure, remain unverified. Retained concerns
Security review detailsSecurity Blast Radius
Security Findings and Attack Paths
Trust Boundaries and Controls
Resilience and Maintainability Implications
Hardening Proposals
🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
Full details: Docstring CoverageExplanation Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 9 functions across 38 files. (2 skipped: 2 unsupported.)
✨ Finishing Touches 💡 1📝 Generate docstrings 💡
🧪 Generate unit tests (beta)
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首轮 review @ 0ad694262（stacked PR 3/3，--comment）
⚠️ HEAD 校准：gh一度缓存的headRefOid=dbe20e696（含_pendingNativeShapeCreation/_onPhysicsUpdate每帧重试机制）是旧 rebase 版；当前真实分支 tip 是0ad694262（commit 2 "keep mesh recooking transactional"），已整体删掉重试机制、改成事务式。本轮按真 tip0ad694262审。
总结
一组 mesh collider / 物理材质 / 默认值的修复，6 个子项：clone 重建 native shape、recooking 事务化、cook-null 视为终止失败（不再每帧重试）、PhysX tolerancesScale 选项 + scaled 默认 contactOffset/sleepThreshold、未显式设置时不覆盖 PhysX 默认、physics-lite 材质写入降级为一次性提示。整体方向正确，事务式重写比旧的"每帧重试"版本干净得多（cook-null 在 PhysX 侧基本是几何确定性失败，每帧重 cook 是热路径开销 + 每帧刷错 —— 删掉是对的，与描述一致）。
重点发现
[P2] PhysicsMaterial 构造期 friction/bounce combine 参数顺序——本 PR 修了一个真实潜伏 bug，但 PR 描述未提及。
createPhysicsMaterial 接口签名是 (staticFriction, dynamicFriction, bounciness, frictionCombine, bounceCombine)（design/IPhysics.ts:76-82，frictionCombine 在前）。dev/2.0 与本 PR base 上，PhysicsMaterial 构造器传的是 (..., this._bounceCombine, this._frictionCombine) —— 顺序反了：PhysX 侧 setFrictionCombineMode(bounceCombine) / setRestitutionCombineMode(frictionCombine)，构造时把摩擦与弹性的 combine 模式装反。本 PR 改成 (this._frictionCombine, this._bounceCombine)，修对了。
- 之所以一直没暴露：两者默认都是
Average（PhysicsMaterial.ts:13-14），只有用户把 frictionCombine / bounceCombine 设成不同值时才显形，且只在构造期（单独 setter 路径一直是对的）。 - 这是个货真价实的正确性修复，值得在 PR 描述里单列一条（当前 6 条 summary 没有这一项）。混在大 PR 里又不提，影响 changelog / 回滚判断。建议补进描述，或单独成一句 commit message 点明。
[P2] LitePhysicsMaterial 用 console.log 报"不支持"，与 physics-lite 既有惯例不一致。
新代码把 5 个 setter 从 throw 改成一次性 console.log("Physics-lite don't support physics material...")（LitePhysicsMaterial.ts:66）。改成非抛出是对的（否则 clone _syncNative 重写会崩），但报告通道选错：同包 LiteDynamicCollider 对同类"不支持，请用 PhysX"用的是 Logger.error(...)（LiteDynamicCollider.ts:27/34/42…）。console.log 既不符合 Logger 惯例、严重度也偏低（"不支持某能力"应当是 warn/error 级，不是 log 级）。建议改成 Logger.warn（保留一次性去重），与既有 lite 不支持提示对齐。参见 cr 原则"不支持应尽早清晰报错，不静默"。
核对通过项
- 事务式 recooking 正确（MeshColliderShape.ts
set mesh/set cookingFlags、PhysXMeshColliderShape_cookMesh/setMeshData/_updateGeometry）：先 cook 新 geometry，setGeometry包 try/catch，失败则清新资源 + 回滚_mesh/_positions/_indices+ refCount，成功才 release 旧资源。失败不丢已工作的 mesh，公开mesh/cookingFlags状态也回滚。无悬挂 native。 - 重试机制已彻底移除、无悬挂引用：
_onPhysicsUpdate（base no-op + override）、Collider._onUpdate的 per-shape 循环、_pendingNativeShapeCreation字段全删干净（grep 物理目录零残留），_createNativeShape/_updateNativeShapeData改返 bool。cook-null 直接return false，终止、不每帧重 cook。 - clone 重建路径正确：
PhysicsMaterial._nativeMaterial/MeshColliderShape._nativeShape标@ignoreClone，靠_cloneTo钩子重建——material_cloneTo调_syncNative()把 5 个属性重写到克隆 native（且_syncNative用对了setFrictionCombine/setBounceCombine顺序），mesh_cloneTo用已 deepClone 的_positions重 cook。_cloneTo由 cloner 同步直调（与 #3036 判例一致），clone 测试（sphere 落在克隆地面）从公开clone()入口守住这条链。 - scaled 默认值公式 + 边界校验：
contactOffset = 0.02 * length、sleepThreshold = 5e-5 * speed²（PhysXPhysics.ts:354-356），与 PhysX 自身 tolerancesScale 缩放约定一致（接触偏移线性于长度单位、休眠能量阈值二次于速度）；_assertPositiveFinite在系统边界（用户传入 options）对 length/speed 校验 + 抛错，符合"边界防御"。构造器重载（typeof === "object"检测 options）向后兼容，干净。 _contractOffset → _contactOffset拼写修复跨 3 处（PhysXColliderShape 字段+setter、PhysXCharacterController 读取）一致修齐，无遗漏。- 可选默认字段下沉（
ColliderShape._contactOffset/DynamicCollider._sleepThreshold改number | undefined，getter?? getDefault?.() ?? 硬编码、setter 仅显式设值时 sync native）：让 PhysX 按 world scale 管默认而不强制覆盖用户值，符合"shared asset + override 透传"心法。
测试
does not retry non-convex mesh creation on non-kinematic dynamic colliders 名字带旧"retry"措辞（机制已删），但测试本身仍有效：验证终止失败只 console.error 一次、随后 3 tick 不再刷错——守住"终止失败不每帧重报"。可顺手把名字里的 "retry" 去掉以免误导，非阻塞。tolerancesScale drives PhysX default...（length=2→0.04 / speed=20→0.02）公式断言正确。material clone 测试从公开 clone 驱动、跑 40 tick 看克隆体按摩擦回弹，守住 material 同步。
结论
无 P0/P1，两个 [P2]（material 参数顺序修复未在描述点明 + lite 用 console.log 不合惯例）均不阻塞，--comment。 stacked PR，建议随 #3025 → #3041 → 本 PR 栈顺序合并。补一下 PR 描述里漏的 combine 顺序修复 + lite 改 Logger.warn 即可。
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Inline comments:
In `@tests/src/core/physics/MeshColliderShape.test.ts`:
- Around line 544-556: Harden the failure assertion in the meshShape.mesh
replacement test by first asserting that thrownError is defined before comparing
it with attachError. Keep the existing identity and rollback assertions
unchanged, using the thrownError variable in the test block as the target.
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ℹ️ Review info
⚙️ Run configuration
Configuration used: Repository UI
Review profile: CHILL
Plan: Pro Plus
Run ID: 28d79017-c3ac-4722-83ba-003e2ba6e709
📒 Files selected for processing (24)
packages/core/src/physics/CharacterController.tspackages/core/src/physics/Collider.tspackages/core/src/physics/DynamicCollider.tspackages/core/src/physics/PhysicsMaterial.tspackages/core/src/physics/RigidCollider.tspackages/core/src/physics/StaticCollider.tspackages/core/src/physics/shape/ColliderShape.tspackages/core/src/physics/shape/MeshColliderShape.tspackages/design/src/physics/IDynamicCollider.tspackages/design/src/physics/IPhysics.tspackages/design/src/physics/IRigidCollider.tspackages/design/src/physics/IStaticCollider.tspackages/design/src/physics/index.tspackages/design/src/physics/shape/IMeshColliderShape.tspackages/physics-physx/src/PhysXCharacterController.tspackages/physics-physx/src/PhysXCollider.tspackages/physics-physx/src/PhysXPhysics.tspackages/physics-physx/src/index.tspackages/physics-physx/src/shape/PhysXColliderShape.tspackages/physics-physx/src/shape/PhysXMeshColliderShape.tstests/src/core/physics/CharacterController.test.tstests/src/core/physics/MeshColliderShape.test.tstests/src/core/physics/PhysXPhysics.test.tstests/src/core/physics/PhysicsMaterial.test.ts
🚧 Files skipped from review as they are similar to previous changes (13)
- packages/core/src/physics/CharacterController.ts
- tests/src/core/physics/PhysicsMaterial.test.ts
- packages/design/src/physics/IPhysics.ts
- packages/core/src/physics/PhysicsMaterial.ts
- tests/src/core/physics/CharacterController.test.ts
- packages/physics-physx/src/PhysXCharacterController.ts
- packages/physics-physx/src/shape/PhysXMeshColliderShape.ts
- tests/src/core/physics/PhysXPhysics.test.ts
- packages/physics-physx/src/shape/PhysXColliderShape.ts
- packages/physics-physx/src/PhysXPhysics.ts
- packages/physics-physx/src/index.ts
- packages/core/src/physics/shape/MeshColliderShape.ts
- packages/core/src/physics/shape/ColliderShape.ts
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Codecov Report❌ Patch coverage is Additional details and impacted files@@ Coverage Diff @@
## dev/2.0 #3042 +/- ##
===========================================
+ Coverage 85.68% 86.01% +0.33%
===========================================
Files 811 815 +4
Lines 94730 95017 +287
Branches 11591 11803 +212
===========================================
+ Hits 81168 81728 +560
+ Misses 13470 13195 -275
- Partials 92 94 +2
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结论
本轮以旧 review 的 0ad694262 为历史基线，并对已重写为 5669f965d...097afee712 的完整三点 diff 重新审查。发现 3 个 [P1] 阻塞问题和 2 个 [P2] 合规问题；实际 review 动作为 REQUEST_CHANGES，目标 HEAD 为 097afee7124acc8c7550e7b74e7cfe2de4a247cc。自动 CR 不替代人工 Reviewer 的合入门禁，修复后仍需人工审核确认。
已关闭问题清单
- 上轮 [P2] PhysicsMaterial combine 参数顺序修复未写入 PR 描述：已修复。当前 Problem 和 Material ownership 均明确写出 combine argument order，代码也保持
frictionCombine, bounceCombine的声明顺序；对应重写提交097afee712。 - 上轮 [P2] physics-lite 用 console.log 报不支持：不适用。当前 base 已由
50ac5bfc3删除 physics-lite，本 PR 也不再包含该兼容路径；不应为旧测试或旧后端恢复它。 - CodeRabbit 对 attachment-failure 测试的“两个 undefined 仍会通过”意见：不适用。该测试随后断言
actorAttachSpy恰好调用一次；若 replacement 根本未进入 attach 路径会直接失败，而 attach mock 返回 false 时originalReplaceShape必然抛出并赋值attachError，不存在所述假绿。
问题
-
[P1] CharacterController 把原生明确不支持的 contactOffset=0 当成已恢复契约（
packages/physics-physx/src/PhysXCharacterController.ts:157-162，tests/src/core/physics/CharacterController.test.ts:193-198）PhysX 的 Box/Capsule CCT setter 在
CctBoxController.h:75和CctCapsuleController.h:75都是if (offset > 0.0f)才写入，PxControllerDesc::isValid()也拒绝contactOffset <= 0。因此公开链路中先把 offset 从默认 0.02 设为 0 时，现有 controller 仍保留 0.02；disable/enable 后 descriptor 先用原生默认 0.1 创建，新增的 post-create setter 又静默忽略 0，真实值变成 0.1，而 Core getter 仍返回 0。新增测试只断言“不抛错”，正好掩盖了这次状态漂移。应保留 PhysX CCT 的严格正值契约作为 owner：在 Core 的 CharacterController add/set 消费边界于提交字段前拒绝 0，把正值直接写入
PxControllerDesc.contactOffset后再创建 controller，并删除 post-create 的“0 可支持”路径。删除当前零值not.toThrow测试，改为零值拒绝测试和正值 disable/enable 后读取原生有效值或验证行为的链路测试。 -
[P1] tolerancesScale 只缩放了部分默认值，默认 mesh welding 仍绑定 1-unit 世界（
packages/physics-physx/src/PhysXPhysics.ts:326-343）_tolerancesScaleLength已成为世界长度单位的权威 owner，PxCookingParams(tolerancesScale)也会据此派生areaTestEpsilon；但默认启用的 VertexWelding 仍把长度量meshWeldTolerance固定为0.001。例如length=100表示厘米制时，原本 1 mm 的相对焊接阈值应为 0.1 simulation units，当前仍是 0.001，导致同一几何只因单位制不同就得到不同的焊接拓扑，严重时会留下重复顶点或退化三角形。保留
_tolerancesScaleLength为唯一 owner，删除固定字面量，机械派生meshWeldTolerance = 0.001 * this._tolerancesScaleLength；补充非 1 scale 下 cooking params 或实际焊接行为测试，避免出现第三份 scale 真相。 -
[P1] CPU mesh cache 依赖当前 isConvex，导致 uploadData(true) 后只能单向切换（
packages/core/src/physics/shape/MeshColliderShape.ts:157-178，tests/src/core/physics/MeshColliderShape.test.ts:915-936）_getMeshData(mesh, true)完全不读取 indices，所以“以 convex 模式赋入一个本来带 indices 的 mesh →uploadData(true)→ 切到 non-convex”时，_indices仍是 null，随后又因 ModelMesh 已不可访问而回滚，isConvex永远保持 true。当前新增测试从 triangle 切到 convex，只覆盖了预先缓存过 indices 的方向，与 PR 所述“convex/triangle switches after uploadData(true)”不对称。Core 的缓存应是完整 CPU mesh snapshot 的唯一 owner：赋入可访问 mesh 时始终缓存可用 indices，只在创建 triangle candidate 时要求 indices 非空；删除按当前模式裁剪缓存的分支，并补
convex → releaseData → triangle的公开链路反向测试。 -
[P2] 新增分支多处省略花括号（
packages/core/src/physics/RigidCollider.ts:13，packages/core/src/physics/shape/MeshColliderShape.ts:49,78,84,105,113,203）项目约定
if/for/while/else即使单行也必须带花括号；请一次性补齐，避免后续事务提交语句被误并入或漏出分支。 -
[P2] 新公开契约与新增注释未满足 TSDoc/注释格式（
packages/design/src/physics/IPhysics.ts:39-47，packages/physics-physx/src/PhysXPhysics.ts:62-69,335,374-383）两个返回值方法缺
@returns；导出的PhysXTolerancesScale/PhysXPhysicsOptions缺接口级多行 TSDoc；@param options - PhysX options.不应以句号结尾；单行// PxPhysics and PxCookingParams copy the scale.也不应带句末句号。请合并校准。
架构、熵增与测试治理
- 上游由
MeshColliderShape持有公开配置、CPU mesh snapshot 和 ModelMesh refCount 的提交事实；下游由IRigidCollider.replaceShape/PhysXCollider独占 actor attachment、native shape 数组和 scene event identity。删除_isShapeAttached镜像、_setNativeShapeAttached同步层与可变setMeshData路径，改为完整 candidate replacement，整体 ownership 方向正确。 - 概念净变化为：删除一份 attachment mirror 和一条原地 geometry mutation 状态机，新增一个 rigid replacement capability；完成上述三个 P1 后，系统熵是净下降。当前剩余熵分别是 CCT descriptor 与 post-create setter 两条契约、scale owner 与固定 weld 字面量两份转换、以及 mode-dependent partial cache。
- 旧的
setMeshData/_isShapeAttached测试与生产兼容路径已删除，没有为历史测试保留 legacy fallback。仍需删除零值“不抛错”伪测试，并补 welding scale 与缓存反向链路；这些测试应守公开或原生契约，不应促使生产代码再加兼容分支。
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结论
本轮以 097afee 为历史基线，完整审查其后两个线性提交，并复核当前完整 owner 链路。发现 1 个 [P1] 阻塞问题，另有上轮遗留的 2 个 [P2]；实际 review 动作为 REQUEST_CHANGES，目标 HEAD 为 09b3912。自动 CR 不替代人工 Reviewer 的合入门禁，修复后仍需人工审核确认。
已关闭问题清单
- 历史 [P2] PhysicsMaterial combine 参数顺序修复未写入 PR 描述：已修复。当前 PR 描述已明确 material combine arguments，代码仍以 frictionCombine, bounceCombine 为唯一声明顺序；对应重写提交 097afee。
- 历史 [P2] physics-lite 用 console.log 报不支持：不适用。当前 base 已删除 physics-lite，本 PR 没有恢复该 legacy 路径。
- CodeRabbit 对 attachment-failure 测试的“两个 undefined 仍会通过”意见：已关闭。提交 11f6ee1 已直接改成 expect(...).toThrow()，同时仍断言 native attach 恰好调用一次、旧 shape 未 detach、candidate 被销毁，并以公开 trigger stay/exit 行为守住事件状态。
- 上轮 [P1] CharacterController 接受 contactOffset=0 并在重建后漂移：已修复。提交 11f6ee1 在 owner 转移前拒绝非正值，把有效值写入 descriptor 后再创建 controller，并用“attach 前拒绝、attached setter 回滚、正值重建保持”三条链路测试替换了零值“不抛错”测试。
- 上轮 [P1] meshWeldTolerance 未随 tolerancesScale.length 缩放：已修复。提交 11f6ee1 从唯一 length owner 机械派生 0.001 * this._tolerancesScaleLength，并增加非 1 scale 断言。
- 上轮 [P1] convex 模式未缓存 indices，releaseData 后无法反向切换：已修复。提交 09b3912 在 mesh 可访问时始终缓存完整 positions/indices snapshot，只在创建 convex candidate 时向后端传 null，并新增 convex → uploadData(true) → non-convex 回归测试。
问题
-
[P1] CCT 内修改 contactOffset 后转移到 RigidCollider 会使用陈旧的 PxShape 值（packages/physics-physx/src/shape/PhysXColliderShape.ts:109-121，packages/core/src/physics/Collider.ts:68-75,182-188）
Collider.addShape 明确支持把同一个 shape 从旧 collider 转移到新 collider；但当前 setContactOffset 在存在 controller 时只更新 _contactOffset mirror 和 PxController，互斥的 else 使持久 _pxShape 保留旧值。于是“Box/Capsule 先挂 CharacterController → 设 contactOffset = 0.3 → 再挂 Static/DynamicCollider”后，Core getter 和 descriptor mirror 都是 0.3，真正被 rigid actor attach 的 _pxShape 仍是此前默认值，碰撞生成继续使用旧 offset。现有新增测试只覆盖 CCT 原地 setter/recreate，没有覆盖合法的 owner 转移。
保留 Core ColliderShape.contactOffset 为唯一配置 owner，PhysX _contactOffset 只作为 CCT descriptor snapshot；删除 native sink 的互斥 if/else，通过一次校验后始终同步持久 _pxShape，再机械更新所有 active controllers。补一条从公开 API 驱动的 CharacterController → RigidCollider 转移测试，验证新 owner 实际消费 0.3，而不是再增加 transfer-time fallback 或第二份状态。
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[P2] 上轮指出的新增单行分支仍未补花括号（packages/core/src/physics/RigidCollider.ts:13，packages/core/src/physics/shape/MeshColliderShape.ts:48,76,80,100,108,189）
这些均是本 PR 新增或重写的事务分支，仍偏离项目“if/for/while/else 一律带花括号”的约定。请一次性补齐，避免后续提交/回滚语句被误并入或漏出事务边界。
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[P2] 上轮指出的新公开契约 TSDoc 与注释格式仍未闭环（packages/design/src/physics/IPhysics.ts:39-47，packages/physics-physx/src/PhysXPhysics.ts:62-66,333,365-379）
getDefaultContactOffset / getDefaultSleepThreshold 仍缺 @returns；导出的 PhysXTolerancesScale / PhysXPhysicsOptions 仍缺接口级多行 TSDoc；@PARAM options - PhysX options. 与单行 // PxPhysics and PxCookingParams copy the scale. 仍带不符合项目约定的句末句号。请与本轮新增的 runtime URL fields 一并校准。
架构、熵增与测试治理
- Mesh 上游仍由 MeshColliderShape 独占公开 mesh/config、CPU snapshot 与 ModelMesh refCount 的提交事实；本轮把 _positions + _indices + _clearMeshData 收口为完整 _meshData snapshot，并只在 PhysX candidate 边界裁剪 convex indices。下游继续由 RigidCollider/PhysXCollider 独占 attach-before-detach、native shape 数组与逻辑 ID/event identity，未新增第三份 attachment 状态或 legacy mutation 路径。
- Scale 上游已收口为 PhysXPhysicsOptions.tolerancesScale 的只读 snapshot；PxPhysics、PxCookingParams、Core defaults 和 weld tolerance 均机械派生。runtime URLs 也并入同一 options contract，删除了平行的 PhysXRuntimeUrls 概念，整体熵下降。
- CCT 链路新增的 pre-attach 与 attached-set 校验没有新增状态，但 _pxShape / PxController 两个派生 native sink 仍由互斥分支维护，形成上述 P1。删除互斥 sink 路径后，数据流应统一为 Core config → PhysX descriptor snapshot → persistent PxShape + active PxController(s)。
- 失效的零值“不抛错”测试及其旧契约已删除；weld scale、反向 mode switch、attachment rollback 均按新公开契约重写。attachment 测试删除了 eventMap/activeTriggers 等私有 fixture 锁定，但保留公开 trigger 行为断言；未发现为了旧测试新增 compatibility branch、legacy fallback、wrapper 或镜像状态。当前仅缺 owner 转移这一条反向链路。
Reapply the Core-owned collision layer after successful mesh replacement. Synchronize contact offset to persistent shapes and active character controllers. Keep the transactional mesh lifecycle focused by removing the independent tolerancesScale API and restoring the existing physics defaults. Add public collision regressions for mesh recooking and controller-to-rigid shape transfer. Validation: module build, all package type builds, and 224 physics tests passed. All five new collision regressions fail without the fixes and pass when restored.
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What changed
Same-type mesh and cooking-option updates cook a candidate mesh, then update the existing native shape through
setGeometry. They retain shape identity and attachment, preserve shape properties, and refresh dynamic mass properties without creating or reattaching a shape. Cooking failure leaves the previous mesh, geometry, public properties, and resource ownership intact. Index uploads read the WASM heap after allocation so memory growth cannot detach the buffer used for the write.Switching between convex and triangle geometry creates and attaches a replacement before committing Core state; attachment failure preserves the previous shape. New shapes use the final world scale and cached CPU mesh data. Scale changes continue to reuse the cooked mesh and native shape.
Cloning a script with a constructor-initialized mesh shape now releases the target's preset mesh reference and native shape. Empty source shapes and failed cooking leave an empty clone; retained CPU data allows cloning after the source mesh becomes unreadable.
Physics material access now follows Renderer's explicit instancing convention:
shape.materialgets or assigns the current reference without allocating or cloning. Core defines all five default properties and keeps one sharedPhysicsMaterialinBasicResources. Unassigned shapes resolve its native handle when created or reset. Engines using the same backend instance share this default. When a later Engine initializes a new backend after the previous one is destroyed, Core creates a new default PhysicsMaterial for that backend. Native resources are released with their backend.shape.getInstanceMaterial()clones an assigned material, or creates an instance with default properties, and binds it to the shape. Repeated calls reuse the instance until a different material ornullis assigned.PhysicsMaterial.clone()copies all five properties.Compatibility and runtime dependency
ColliderShape.materialnow returnsnullwhen no material is assigned. Code that previously edited an implicit default throughshape.material.bounciness = valueshould useshape.getInstanceMaterial().bounciness = value. Editing an explicitly assigned shared material throughmaterialcontinues to affect all shapes referencing it. Instance materials remain caller-managed and must be destroyed when no shapes use them.Custom physics backends use argument-less
initialize(), accept Core-defined properties increatePhysicsMaterial(properties), and accept non-null material handles in shape creation andsetMaterial. They no longer expose or select a default material. Backend teardown releases outstanding native materials. Public material and shape constructors remain argument-less. The existing global physics selection remains; this change does not introduce independent per-Engine backend routing or ResourceManager ownership for explicit materials.Mesh backends implement
IMeshColliderShape.setMeshData(positions, indices, cookingFlags): booleanfor same-type updates, preserving the previous shape on failure. Geometry type is fixed when the native shape is created; convex/triangle transitions use the checked replacement operation.Matching PhysX binding: galacean/physX.js#23. Before merging this Engine PR, publish the matching standard/SIMD runtime pairs and update the default CDN URLs. Those URLs still point to the previous runtime, which lacks
PxController.setMaterial. Material integration tests use the included artifacts via explicit runtime URLs.Verification
pnpm b:moduleand PhysX packageb:typespassed. Fullpnpm b:typespassed at the preceding head.HEADLESS=true pnpm exec vitest run tests/src/core/physics tests/src/loader/SceneFormatV2.test.ts: 392 tests across 13 files passed at the preceding head.HEADLESS=true pnpm exec vitest run tests/src/core/physics/MeshColliderShape.test.ts: 98 tests passed, including four cases that force WASM memory growth during Uint16/Uint32 index uploads in standard and SIMD runtimes.git diff --checkpassed.Summary by CodeRabbit
New Features
getInstanceMaterial()explicitly creates or clones a material for the shape.Bug Fixes