On 05/21/2014 12:45 PM, Jens Axel Søgaard wrote:
2014-05-21 17:37 GMT+02:00 Laurent <laurent.ors...@gmail.com>:
... it eats everything! (particularly exceptions)
For example, it is perfectly happy with the following:
% racket
Welcome to Racket v6.0.1.7.
(require plot)
(plot (function (lambda(x)(+ x n)))
#:x-min 0 #:x-max 10 #:y-min 0 #:y-max 10)
(object:2d-plot-snip% ...)
... although n is clearly undefined. Presumably this is to avoid breaking on
math errors like `(/ 0)` ?
Actually I think there need to be an add-on to plot that takes care of
plotting functions with singularities. Currently the plot for (/ 1 x)
in [-1;1] looks wrong.
An attempt for such an add-on that uses plot as backend:
https://github.com/soegaard/bracket/blob/master/plotting/adaptive-plotting.rkt
This is about the third item on my to-do list. Right now, I'm working on
a standalone 3D engine in Typed Racket, which Plot will use for its 3D
plots. I'm also strongly considering having Plot assemble picts for 2D
plots instead of drawing them directly on a device context.
How function and surface renderers tell Plot what to draw is going to
change. I'm holding off on adaptive sampling until I've finished
monkeying with the plumbing.
Neil ⊥
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