# TriangleMeshPart

Roblox Engine API class from Roblox Studio 0.744.0.7441077 (version-7aaa6838d36c4448).

- Inherits from, nearest first: [BasePart](https://rapi.sleaze.dev/classes/BasePart.md), [PVInstance](https://rapi.sleaze.dev/classes/PVInstance.md), [Instance](https://rapi.sleaze.dev/classes/Instance.md), [Object](https://rapi.sleaze.dev/classes/Object.md)
- Subclasses: [MeshPart](https://rapi.sleaze.dev/classes/MeshPart.md), [PartOperation](https://rapi.sleaze.dev/classes/PartOperation.md)
- Tags: Not browsable, Not creatable
- Memory category: Instances
- HTML page: https://rapi.sleaze.dev/classes/TriangleMeshPart/
- Roblox documentation: https://create.roblox.com/docs/reference/engine/classes/TriangleMeshPart

Abstract intermediate class that manages physical geometry properties for PartOperations and MeshParts.

## Properties

### FluidFidelity

```luau
TriangleMeshPart.FluidFidelity: Enum.FluidFidelity
```

- Tags: Not replicated, Read capabilities: Basic, Write capabilities: PluginOrOpenCloud, Load only

Determines the geometric representation used to compute aerodynamic forces and torques.

### FluidFidelityInternal

```luau
TriangleMeshPart.FluidFidelityInternal: Enum.FluidFidelity
```

- Tags: Hidden, Not scriptable, Roblox engine security, Read capabilities: Basic

### InertiaMigrated

```luau
TriangleMeshPart.InertiaMigrated: boolean
```

- Tags: Hidden, Not scriptable, Roblox engine security, Read capabilities: Basic

### UnscaledCofm

```luau
TriangleMeshPart.UnscaledCofm: Vector3
```

- Tags: Hidden, Roblox engine security, Read capabilities: Basic

### UnscaledVolInertiaDiags

```luau
TriangleMeshPart.UnscaledVolInertiaDiags: Vector3
```

- Tags: Hidden, Roblox engine security, Read capabilities: Basic

### UnscaledVolInertiaOffDiags

```luau
TriangleMeshPart.UnscaledVolInertiaOffDiags: Vector3
```

- Tags: Hidden, Roblox engine security, Read capabilities: Basic

### UnscaledVolume

```luau
TriangleMeshPart.UnscaledVolume: number
```

- Tags: Hidden, Roblox engine security, Read capabilities: Basic

### CollisionFidelity

```luau
TriangleMeshPart.CollisionFidelity: Enum.CollisionFidelity
```

- Tags: Not replicated, Read capabilities: Basic, Write capabilities: PluginOrOpenCloud, Load only

Determines the level of detail the part's physics will adhere to its mesh.

### CollisionPrecision

```luau
TriangleMeshPart.CollisionPrecision: number
```

- Tags: Not replicated, Write: Plugin security, Read capabilities: Basic, Load only

Quantifies how precise or performant a `CollisionFidelity.Tunable` collision geometry is, from `0` to `1`.

### PCDRequestId

```luau
TriangleMeshPart.PCDRequestId: number
```

- Tags: Hidden, Not replicated, Not scriptable, Roblox engine security, Read capabilities: Basic

### AeroMeshData

```luau
TriangleMeshPart.AeroMeshData: SharedString
```

- Tags: Hidden, Not scriptable, Roblox engine security, Read capabilities: Basic

### ConvexDecompHolder

```luau
TriangleMeshPart.ConvexDecompHolder: NetAssetRef
```

- Tags: Hidden, Not scriptable, Roblox engine security, Read capabilities: Basic

### MeshSize

```luau
TriangleMeshPart.MeshSize: Vector3
```

- Tags: Read only, Read capabilities: Basic

The original size of the part's source mesh geometry, before any scaling applied through [`BasePart.Size`](https://rapi.sleaze.dev/classes/BasePart.md).

### PhysicalConfigData

```luau
TriangleMeshPart.PhysicalConfigData: SharedString
```

- Tags: Hidden, Not scriptable, Roblox engine security, Read capabilities: Basic

## Inherited members

- From [BasePart](https://rapi.sleaze.dev/classes/BasePart.md): `BrickColor`, `CastShadow`, `Color`, `Color3uint8`, `Material`, `MaterialVariant`, `MaterialVariantSerialized`, `Reflectance`, `Transparency`, `brickColor`, `AssemblyAngularVelocity`, `AssemblyCenterOfMass`, `AssemblyLinearVelocity`, `AssemblyMass`, `AssemblyRootPart`, `DraggingV1`, `EnableFluidForces`, `NetworkOwnershipRule`, `AudioCanCollide`, `CanCollide`, `CanQuery`, `CanTouch`, `CollisionGroup`, `CollisionGroupReplicate`, `CollisionGroupId`, `LocalTransparencyModifier`, `Locked`, `NetworkIsSleeping`, `NetworkOwnerV3`, `ResizeableFaces`, `ResizeIncrement`, `Rotation`, `RotVelocity`, `SpecificGravity`, `Velocity`, `Anchored`, `CenterOfMass`, `CurrentPhysicalProperties`, `CustomPhysicalProperties`, `Mass`, `Massless`, `ReceiveAge`, `RootPriority`, `siz`, `size`, `Elasticity`, `Friction`, `PivotOffset`, `BackSurface`, `BottomSurface`, `FrontSurface`, `LeftSurface`, `RightSurface`, `TopSurface`, `BackParamA`, `BackParamB`, `BackSurfaceInput`, `BottomParamA`, `BottomParamB`, `BottomSurfaceInput`, `FrontParamA`, `FrontParamB`, `FrontSurfaceInput`, `LeftParamA`, `LeftParamB`, `LeftSurfaceInput`, `RightParamA`, `RightParamB`, `RightSurfaceInput`, `TopParamA`, `TopParamB`, `TopSurfaceInput`, `CFrame`, `ExtentsCFrame`, `ExtentsSize`, `Orientation`, `PhysicsRepRootPart`, `PhysicsRepRootRef`, `Position`, `ReplicationPV`, `Size`, `AngularAccelerationToTorque`, `ApplyAngularImpulse`, `ApplyImpulse`, `ApplyImpulseAtPosition`, `BindToCollisionSummaries`, `CanCollideWith`, `CanSetNetworkOwnership`, `GetClosestPointOnSurface`, `GetConnectedParts`, `GetJoints`, `GetMass`, `GetNetworkOwner`, `GetNetworkOwnershipAuto`, `GetNoCollisionConstraints`, `GetPhysicsCost`, `GetTouchingParts`, `GetVelocityAtPosition`, `IntersectAsync`, `IsGrounded`, `Resize`, `SetNetworkOwner`, `SetNetworkOwnershipAuto`, `SubtractAsync`, `TorqueToAngularAcceleration`, `UnionAsync`, `BreakJoints`, `GetRenderCFrame`, `GetRootPart`, `MakeJoints`, `breakJoints`, `getMass`, `makeJoints`, `resize`, `NetworkOwnerChanged`, `Touched`, `TouchEnded`, `LocalSimulationTouched`, `OutfitChanged`, `StoppedTouching`
- From [PVInstance](https://rapi.sleaze.dev/classes/PVInstance.md): `Pivot Offset`, `Origin`, `GetPivot`, `PivotTo`
- From [Instance](https://rapi.sleaze.dev/classes/Instance.md): `Archivable`, `archivable`, `Attributes`, `AttributesReplicate`, `AttributesSerialize`, `HistoryId`, `Name`, `Parent`, `PredictionMode`, `PropertyStatusStudio`, `RobloxLocked`, `SerializedOverrides`, `SourceAssetId`, `Tags`, `UniqueId`, `numExpectedDirectChildren`, `DataCost`, `Capabilities`, `DefinesCapabilities`, `IsInSandbox`, `Sandboxed`, `AddTag`, `ClearAllChildren`, `Clone`, `Destroy`, `FindFirstAncestor`, `FindFirstAncestorOfClass`, `FindFirstAncestorWhichIsA`, `FindFirstChild`, `FindFirstChildOfClass`, `FindFirstChildWhichIsA`, `FindFirstDescendant`, `GetActor`, `GetAttribute`, `GetAttributeChangedSignal`, `GetAttributes`, `GetChildren`, `GetDebugId`, `GetDescendants`, `GetFullName`, `GetStyled`, `GetStyledPropertyChangedSignal`, `GetTags`, `HasTag`, `IsAncestorOf`, `IsDescendantOf`, `IsPropertyModified`, `QueryDescendants`, `RemoveTag`, `ResetPropertyToDefault`, `SetAttribute`, `WaitForChild`, `Remove`, `children`, `clone`, `destroy`, `findFirstChild`, `getChildren`, `isDescendantOf`, `remove`, `AncestryChanged`, `AttributeChanged`, `ChildAdded`, `ChildRemoved`, `DescendantAdded`, `DescendantRemoving`, `Destroying`, `StyledPropertiesChanged`, `childAdded`
- From [Object](https://rapi.sleaze.dev/classes/Object.md): `ClassName`, `className`, `GetPropertyChangedSignal`, `IsA`, `isA`, `Changed`