PARAMETERS
       texture  Specifies which texture unit to make active. The number of tex‐
                ture units is implementation dependent, but must  be  at  least
                two.  texture  must  be  one  of GL_TEXTUREi_ARB, where 0 ≤ i <
                GL_MAX_TEXTURE_UNITS_ARB, which is an  implementation-dependent
                value.  The intial value is GL_TEXTURE0_ARB.

DESCRIPTION
       glActiveTextureARB  selects  which texture unit subsequent texture state
       calls will affect.  The number of texture units an  implementation  sup‐
       ports is implementation dependent, but must be at least 2.

       Vertex  arrays  are  client-side GL resources, which are selected by the
       glClientActiveTextureARB routine.

NOTES
       glActiveTextureARB is only supported if GL_ARB_multitexture is  included
       in  the  string  returned  by  glGetString when called with the argument
       GL_EXTENSIONS.

ERRORS
       GL_INVALID_ENUM is generated if texture is not one of GL_TEXTUREi_ARB,
       where 0 ≤ i < GL_MAX_TEXTURE_UNITS_ARB.

SEE ALSO
       glClientActiveTextureARB,       glGetIntegerv,       glMultiTexCoordARB,
       glTexParameter

                                                         GLACTIVETEXTUREARB(3G)