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 Status Comment
WebGL 2.0
The definition of 'beginTransformFeedback' in that specification.
Editor's Draft Initial definition for WebGL.
OpenGL ES 3.0
The definition of 'glBeginTransformFeedback' in that specification.
Standard Man page of the (similar) OpenGL API.

Browser compatibility

BCD tables only load in the browser

See also