WebGLRenderingContext: getActiveAttrib() method

{{APIRef("WebGL")}}{{AvailableInWorkers}}

The WebGLRenderingContext.getActiveAttrib() method of the WebGL API returns a {{domxref("WebGLActiveInfo")}} object containing size, type, and name of a vertex attribute. It is generally used when querying unknown attributes either for debugging or generic library creation.

Syntax

getActiveAttrib(program, index)

Parameters

• program
  • : A {{domxref("WebGLProgram")}} containing the vertex attribute.
• index
  • : A {{domxref("WebGL_API/Types", "GLuint")}} specifying the index of the vertex attribute to get. This value is an index 0 to N - 1 as returned by {{domxref("WebGLRenderingContext.getProgramParameter", "gl.getProgramParameter(program, gl.ACTIVE_ATTRIBUTES)")}}.

Return value

A {{domxref("WebGLActiveInfo")}} object.

Examples

const numAttribs = gl.getProgramParameter(program, gl.ACTIVE_ATTRIBUTES);
for (let i = 0; i < numAttribs; ++i) {
  const info = gl.getActiveAttrib(program, i);
  console.log("name:", info.name, "type:", info.type, "size:", info.size);
}

Specifications

{{Specifications}}

Browser compatibility

{{Compat}}

See also

• {{domxref("WebGLActiveInfo")}}