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WebGL2RenderingContext: beginTransformFeedback() method

The WebGL2RenderingContext.beginTransformFeedback() method of the WebGL 2 API starts a transform feedback operation.

Syntax

js

beginTransformFeedback(primitiveMode)

Parameters

primitiveMode

A GLenum specifying the output type of the primitives that will be recorded into the buffer objects that are bound for transform feedback. Possible values:

  • gl.POINTS
  • gl.LINES
  • gl.TRIANGLES

Return value

None (undefined).

Examples

js

const transformFeedback = gl.createTransformFeedback();
gl.bindTransformFeedback(gl.TRANSFORM_FEEDBACK, transformFeedback);
gl.beginTransformFeedback(gl.TRIANGLES);
gl.drawArrays(gl.TRIANGLES, 0, 3);

Specifications

Specification
WebGL 2.0 Specification
# 3.7.15

Browser compatibility

Desktop Mobile
Chrome Edge Firefox Internet Explorer Opera Safari WebView Android Chrome Android Firefox for Android Opera Android Safari on IOS Samsung Internet
beginTransformFeedback 56 79 51 No 43 15 58 58 51 43 15 7.0

See also

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Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/API/WebGL2RenderingContext/beginTransformFeedback