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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:
WebGL2RenderingContext.createTransformFeedback()
WebGL2RenderingContext.deleteTransformFeedback()
WebGL2RenderingContext.isTransformFeedback()
WebGL2RenderingContext.bindTransformFeedback()
WebGL2RenderingContext.beginTransformFeedback()
WebGL2RenderingContext.endTransformFeedback()
WebGL2RenderingContext.pauseTransformFeedback()
WebGL2RenderingContext.resumeTransformFeedback()
WebGL2RenderingContext.transformFeedbackVaryings()
WebGL2RenderingContext.getTransformFeedbackVarying()
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
.