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WebGLTransformFeedback

This is an experimental technology
Because this technology's specification has not stabilized, check the compatibility table for usage in various browsers. Also note that the syntax and behavior of an experimental technology is subject to change in future versions of browsers as the specification changes.

The WebGLTransformFeedback interface is part of the WebGL 2 API and enables transform feedback, which is the process of capturing primitives generated by vertex processing. It allows to preserve the post-transform rendering state of an object and resubmit this data multiple times.

When working with WebGLTransformFeedback objects, the following methods of the WebGL2RenderingContext are useful:

Examples

Creating a WebGLTransformFeedback object

in this example, gl must be a WebGL2RenderingContext. WebGLTransformFeedback objects are not available in WebGL 1.

var transformFeedback = gl.createTransformFeedback();

Specifications

Specification Status Comment
WebGL 2.0
The definition of 'WebGLTransformFeedback' in that specification.
Editor's Draft Initial definition.

Browser compatibility

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
Basic support No support [2] Nightly build [1] No support No support No support
Feature Android Chrome for Android Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
Basic support No support No support No support No support No support No support

[1] WebGL 2 is enabled by default in Firefox Nightly. To enable it in a release version of Firefox, set the preference webgl.enable-prototype-webgl2 to true in about:config.

[2] To use an experimental implementation of WebGL 2 in Chrome, you have to start Chrome with the runtime flag --enable-unsafe-es3-apis.

Document Tags and Contributors

 Contributors to this page: fscholz
 Last updated by: fscholz,