---
title: USDValue.Vec3d
framework: usdkit
role: symbol
role_heading: Structure
path: usdkit/usdvalue/vec3d
---

# USDValue.Vec3d

A 3-component double-precision vector.

## Declaration

```swift
struct Vec3d
```

## Topics

### Initializers

- [init()](usdkit/usdvalue/vec3d/init().md)
- [init(_:_:_:)](usdkit/usdvalue/vec3d/init(_:_:_:).md)

## Relationships

### Conforms To

- [Copyable](swift/copyable.md)
- [Escapable](swift/escapable.md)
- [ExpressibleByArrayLiteral](swift/expressiblebyarrayliteral.md)
- [Sendable](swift/sendable.md)
- [SendableMetatype](swift/sendablemetatype.md)
- [USDPrim.Attribute.MetadataValue](usdkit/usdprim/attribute/metadatavalue.md)
- [USDPrim.Attribute.Value](usdkit/usdprim/attribute/value.md)
- [USDValueProtocol](usdkit/usdvalueprotocol.md)

## See Also

### Inspecting the value

- [typeName](usdkit/usdvalue/typename.md)
- [isEmpty](usdkit/usdvalue/isempty.md)
- [isArrayValued](usdkit/usdvalue/isarrayvalued.md)
- [arraySize](usdkit/usdvalue/arraysize.md)