---
title: "glBeginTransformFeedback(_:)"
framework: OpenGL ES
role: symbol
role_heading: Function
platforms: [iOS 7.0+, iPadOS 7.0+, Mac Catalyst 7.0+, tvOS 9.0+]
path: "opengles/glbegintransformfeedback(_:)"
---

# glBeginTransformFeedback(_:)

## Declaration

```swift
func glBeginTransformFeedback(_ primitiveMode: GLenum)
```