Standard image format in Racket.
The pict library is one of the standard Racket functional picture libraries.
It supports both vector and bitmap images.
Questions tagged [pict]
13 questions
5
votes
3 answers
How to use GraphViz and Racket
Is it possible to use the graphviz module to draw graphs in a racket frame (GUI)?
If it's possible, would anyone a tutorial that shows how to use?
Thank's
chsms
- 107
- 2
4
votes
1 answer
Racket - export Pict to Image File
How would I go about exporting a Racket pict as an image file I can use on a web page?
(any html-capable format or data-uri would do)
Arjun
- 1,701
- 4
- 17
- 25
3
votes
2 answers
Visualize arbitrary tree in Racket using tree-layout
How to visualise arbitrary tree?
for example:
(define T1 '(and (or x1 x2)(or x3 x4 x5)))
or one generated with:
(define functions '(not if and or))
(define terminals '(A0 A1 A2 D0 D1))
(define functions&terminals (append terminals functions…
X10D
- 600
- 2
- 13
3
votes
2 answers
hb-append vs hbl-append and ht-append vs htl-append in pict
Racket's pict, has several combinators for combining other pictures. These docs contain a nice table for how its *-append combinators work:
Most of these examples make sense. The first letter is v or h for vertical and horizontal respectively. The…
Leif Andersen
- 21,580
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3
votes
1 answer
Racket and 2htdp/image in the terminal
I don't know how to display images in the terminal.
Here is a .rkt test script:
#lang racket
(require 2htdp/image)
(circle 10 "solid" "red")
Then, I do this in the terminal:
$ racket
Welcome to Racket v6.8.
> (enter! "test.rkt")
(object:image%…
Albert Han
- 109
- 1
- 2
- 9
3
votes
1 answer
How can I wrap text around an Image in a Scheme Slideshow?
I'm trying to code a slideshow using Racket, and I want most of my images to be on the right hand side of my text.
So far I have the image where i want it, but all text afterwards ends up under the image to the left. I cant seem to get the text to…
user2305426
- 51
- 4
2
votes
1 answer
racket/draw: get list of font face names?
Is it possible to get a list of available font face names in Racket?
I want all values of x such that (text "Kimkoh" x) returns a pict with a unique font face.
Ben Greenman
- 1,945
- 12
- 22
2
votes
1 answer
racket: pict to bytes (pixels)
How can I turn a pict into a byte string of the pixels in it?
(I mean, a byte string of the pixels that would be in the bitmap you'd get from rendering the pict)
This function works:
#lang racket/base
(require pict racket/class)
(define…
Ben Greenman
- 1,945
- 12
- 22
1
vote
1 answer
Painter example in SICP
The "Painter" example from SICP 2.2.4 is pretty interesting, and gives ways to create nice Escher-like paintings. For example, a recursive right-split procedure can be done something like:
(define (right-split painter n)
(if (= n 0)
painter
…
learn-sicp
- 69
- 4
1
vote
1 answer
Racket Slideshow 2Htdp Pict
I am trying to try and create an image using racket. I want to try and make a waffle but I can't seem to figure it out. This is my code:
#lang slideshow
(require 2htdp/image)
(define (waffle img)
(define two-p (hc-append img (rectangle 10 10…
Connie
- 251
- 4
- 17
1
vote
1 answer
How to draw a picture in web app using Racket?
I'm looking for a way of drawing a pictures in my simple web-app. Basically I'm trying to submit a picture of circle using standard slideshow library, but it doesn't work and I have no idea why.
Here is a sample:
#lang web-server/insta
(require…
Dimitry
- 11
- 3
1
vote
2 answers
Draw an arrow in racket
How to draw an arrow in a frame in racket (DrRacket)? For example between two objects: a circle and a rectangle obtained by:
(send dc draw-ellipse 50 50 30 30) and (send dc draw-rectangle 200 200 30 6)
chsms
- 107
- 2
0
votes
1 answer
How to design a Button with an icon or pict in Racket?
I want to do Buttons and so to look nicer when doing windowing in Dr Racket. I did not found an example how to do it and where are icons stored.
Isabel
jdabel
- 11
- 1
- 1