---
title: "vertex(_:at:ofPath:at:)"
framework: Professional Video Applications
role: symbol
role_heading: Instance Method
platforms: [fxplug 4.0+]
path: "professional_video_applications/fxpathapi_v3/vertex(_:at:ofpath:at:)"
---

# vertex(_:at:ofPath:at:)

Provides information about a single vertex on the path at the given time.

## Declaration

```swift
func vertex(_ vertex: UnsafeMutablePointer<FxVertex>!, at index: Int, ofPath pathID: FxPathID!, at time: CMTime) throws
```

## Parameters

- `vertex`: A pointer to an FxVertex structure to hold the information about the vertex in question.
- `index`: The index of the vertex you want to retrieve. This is 0-based, so if the path has n vertices, this will be between 0 and n-1.
- `pathID`: The ID of the path from which you wish to retrieve a vertex.
- `time`: The time at which to retrieve the vertex information.

## See Also

### Getting Path Information

- [numberOfPaths(at:)](professional_video_applications/fxpathapi_v3/numberofpaths(at:).md)
- [pathID(_:for:)](professional_video_applications/fxpathapi_v3/pathid(_:for:).md)
- [name(_:ofPath:)](professional_video_applications/fxpathapi_v3/name(_:ofpath:).md)
- [isPath(_:open:at:)](professional_video_applications/fxpathapi_v3/ispath(_:open:at:).md)
- [isPath(_:inverted:at:)](professional_video_applications/fxpathapi_v3/ispath(_:inverted:at:).md)
- [style(_:ofPath:)](professional_video_applications/fxpathapi_v3/style(_:ofpath:).md)
- [length(_:ofPath:at:)](professional_video_applications/fxpathapi_v3/length(_:ofpath:at:).md)
- [length(_:ofSegment:ofPath:at:)](professional_video_applications/fxpathapi_v3/length(_:ofsegment:ofpath:at:).md)
- [number(ofVertices:inPath:at:)](professional_video_applications/fxpathapi_v3/number(ofvertices:inpath:at:).md)
- [point(_:atPercentageOfDistance:alongPath:at:)](professional_video_applications/fxpathapi_v3/point(_:atpercentageofdistance:alongpath:at:).md)
- [point(_:atPercentageOfParameter:alongPath:at:)](professional_video_applications/fxpathapi_v3/point(_:atpercentageofparameter:alongpath:at:).md)
- [blendMode(_:ofPath:)](professional_video_applications/fxpathapi_v3/blendmode(_:ofpath:).md)
- [pathGeometryInfo(_:forPath:at:)](professional_video_applications/fxpathapi_v3/pathgeometryinfo(_:forpath:at:).md)