---
title: MTLPrimitiveTopologyClass.line
framework: metal
role: symbol
role_heading: Case
path: metal/mtlprimitivetopologyclass/line
---

# MTLPrimitiveTopologyClass.line

A line primitive.

## Declaration

```swift
case line
```

## See Also

### Topology classes

- [MTLPrimitiveTopologyClass.unspecified](metal/mtlprimitivetopologyclass/unspecified.md)
- [MTLPrimitiveTopologyClass.point](metal/mtlprimitivetopologyclass/point.md)
- [MTLPrimitiveTopologyClass.triangle](metal/mtlprimitivetopologyclass/triangle.md)