/* color range */
_gcrange(doset)
{
        local lo, hi, set;

        (lo, hi, set) = getcrange();

        if (argc < 1) doset = 1;

        if (not(set) || not(doset))
        {
                lo = (length(w0) > 0) ? min : 0;
                hi = (length(w0) > 0) ? max : 255;
        }

        if (argc > 0) set = doset;

        /* set globals used by ser3dctl.pan */
        setvar("_clrlo",  lo);
        setvar("_clrhi",  hi);
        setvar("_clrset", set);

        return(set);
}