Enable a vertex attribute array. Attributes will be used for use by
subsequent draw operations. Be sure to call
on the same attribute to prevent currently enabled attributes from affecting
index (int) – Index of the attribute to enable. If legacy=True, this value should be a GLenum type corresponding to the capability to bind the buffer to, such as GL_VERTEX_ARRAY, GL_TEXTURE_COORD_ARRAY, GL_NORMAL_ARRAY, etc.
legacy (bool, optional) – Use legacy vertex attributes (ie. GL_VERTEX_ARRAY, GL_TEXTURE_COORD_ARRAY, etc.) for backwards compatibility.