protected function lib_fade($args)
    {
        list($color, $alpha) = $this->colorArgs($args);
        $color[4] = $this->clamp($alpha / 100.0);

        return $color;
    }
protected function lib_fade($args)
    {
        list($color, $alpha) = $this->colorArgs($args);
        $color[4] = $this->clamp($alpha / 100.0);

        return $color;
    }
protected function lib_fade ( $ args ) { list ( $ color , $ alpha ) = $ this -> colorArgs ( $ args ) ; $ color [ 4 ] = $ this -> clamp ( $ alpha / 100.0 ) ; return $ color ; }
set the alpha of the color
set the alpha of the color