Re: [Haskell-cafe] Re: Higher-order algorithms

The function image style always described as "from Point to ..." [insert Picture, Bitmap, Texture...] is also inherently higher order. Examples are Conal Elliott's Pan, Jerzy Karczmarczuk's Clastic and Peter Henderson's images. In Clastic and Pan, the higher order image seems like a characteristic function extended to generate a colour rather than a boolean test, in Peter Henderson's work (I think) the images are always described with vectors displacing an initial point and so have similarities to the "coordinate free style" of graphics pioneered by Tony DeRose and others.