WebGL2RenderingContext.beginTransformFeedback()

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

Syntax

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

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

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See also