WebGL2RenderingContext.beginTransformFeedback()

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

Syntax

void gl.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.

Examples

var 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 (WebGL 2.0) # 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