U.S. director Richard Linklater has turned a bleak 1977 science fiction novel into an animation film starring Keanu Reeves, and believes its vision of a country ruled by fear and heavy surveillance proved prescient."A Scanner Darkly" is based on a Philip K. Dick novel of the same name, and tells the story of a group of friends who end up spying on each other as the authorities seek to crack down on "drug terrorism." Linklater, whose "Fast Food Nation" is also being presented at the Cannes Film Festival but in the main competition, is wary of drawing direct comparisons between Dick's vision and today's reality, but he told reporters on Thursday: "You can read something written 30 years ago and by and large think it is your present, which is how I feel about Scanner Darkly to a large degree," he said. Reuters reports.