WebGLRenderingContext.getActiveAttrib()

The WebGLRenderingContext.getActiveAttrib() method of the WebGL API returns a 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

WebGLActiveInfo gl.getActiveAttrib(program,index);

Parameters

program
A WebGLProgram containing the vertex attribute.
index
A GLuint specifying the index of the vertex attribute to get. This value is an index 0 to N - 1 as returned by gl.getProgramParameter(program, gl.ACTIVE_ATTRIBUTES).

Return value

A 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

Specification Status Comment
WebGL 1.0
The definition of 'getActiveAttrib' in that specification.		 Recommendation Initial definition.
OpenGL ES 2.0
The definition of 'glGetActiveAttrib' in that specification.		 Standard Man page of the OpenGL API.

Browser compatibility

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See also