This challenge involves drawing pictures on a screen or generating image files. For ASCII art output, use [tag:ascii-art]. For images as input, use [tag:image-processing].
7
votes
1answer
337 views
Open source optical lattice clock
A recent question showed how Mathematica could be used to make a beautiful optical lattice clock image. The image looks like this.
This challenge is to reproduce this image as closely as possible ...
9
votes
12answers
906 views
Spirograph Time!
A Spirograph is a toy that draws hypotrochoids and epitrochoids. For this challenge, we'll just focus on the hypotrochoids.
From Wikipedia:
A hypotrochoid is a roulette traced by a point ...
19
votes
45answers
4k views
Write a hello world GUI program that closes itself after three seconds
Please read the rules, and the bold areas as well.
Write a program in any language, so long as it has GUI support for a window system (cannot be text-consoles, etc., and must be a ...
7
votes
2answers
478 views
Steampunk: Clacker animation
In the highly underrated Steampunk novel The Difference Engine, the equivalent of cinema houses delivered a pixelated moving image displayed by tiles which could be flipped mechanically. The control ...
10
votes
3answers
580 views
Output a solid PNG from scratch
Input: An RGBA hex color c (ex. FFFF00FF) and an integer > 0 and < 1000 n (ex. 200).
Output: Raw bytes of a PNG file such that when the output is saved to a file and opened in an image viewer, an ...
53
votes
13answers
7k views
Draw the € sign
The goal is to output or display an image with an € (euro) sign according to the following specs (ignoring the border of the sign).
Source: http://en.wikipedia.org/wiki/File:Euro_Construction.svg
...
22
votes
4answers
3k views
May the 4th be with you!
In honor of Star Wars day, write a program to display the following text, scrolling like the Star Wars opening crawl:
It is a period of civil war. Rebel
spaceships, striking from a hidden
...
3
votes
0answers
388 views
Collatz Attack!
This challenge is based on some new findings related to the Collatz conjecture and designed somewhat in the spirit of a collaborative polymath project. Solving the full conjecture is regarded as ...
15
votes
4answers
553 views
I like Pythagorean trees
...so this is a challenge to make me a tree.
Produce a program or function called tree which takes a single integer argument, N and draws a Pythagorean Tree N levels deep, where level 0 is just the ...
8
votes
3answers
626 views
building circuit for divisibility by 3
A boolean circuit in TCS is basically a DAG consisting of And, Or, Not gates, and by what is known is "functional completeness" they can compute all possible functions. eg this is the basic principle ...
10
votes
2answers
660 views
Make a word cloud from a text
The code should take text from standard input:
The definition of insanity is quoting the same phrase again and again and not expect despair.
The output should be a PNG file containing the word ...
54
votes
6answers
5k views
Is it dark outside? Draw a sun map!
Our closest star, the sun, is quite fidgety. The times it rises and sets depend on where you are, and whether it is winter or not.
We would like to be able to deduce if the sun is shining outside ...
13
votes
2answers
537 views
What do you see in an inkspot? Rorschach generation'
So I'd like you to attempt to generate Rorschach images like the below image:
Here is a link to further inspiration.
This is a popularity contest, but I will say that colours are likely to be more ...
6
votes
1answer
405 views
Create a random 3D asteroid
Imagine you are working on a 3D adaptation of the classical video game Asteroids. Your task is to write an algorithm that can create a random 3D asteroid.
This is a popularity contest, not code golf. ...
50
votes
27answers
7k views
Mandelbrot image in every language
I always used a Mandelbrot image as the 'graphical' version of Hello World in any graphical application I got my hands on. Now it's your guys' turn.
Language must be capable of graphical output or ...
24
votes
17answers
3k views
Output an image of your source code (not-quite-a-Quine)
Code golf: Print an image of the source code.
Requirements
Must output the image of the source code itself, not a version stored elsewhere and retrieved at run time.
Code must be legible enough ...
203
votes
39answers
47k views
Images with all colors
Similar to the images on allrgb.com, Make images where each pixel is a unique color (no color is used twice and no color is missing).
Give a program that generates such an image, along with a ...
18
votes
8answers
1k views
Cubify This! A lesson in grayscale… er… color… er… whatever
Being a big fan of the Rubik's cube and of cool art, I've been working on combining the two together to do some really cool stuff. Basically solving miniature Rubik's cubes to form rudimentary pixels ...
0
votes
1answer
169 views
Plot gif of 3 dimensional heart in R [closed]
inspired by this blog: http://alstatr.blogspot.co.uk/2014/02/r-animating-2d-and-3d-plots.html I made a 2D gif of a heart with:
library(animation)
saveGIF({
for(i in 1:150){
dat<- ...
6
votes
1answer
343 views
Graphical, networked, two-(human)-player Tic-Tac-Toe
Create a Tic-Tac-Toe game that allows two human players to play against each other using two networked devices.
Requirements:
Network play.
Program must let both players know whose turn it is.
...
15
votes
1answer
604 views
QR Codes… and all that Jazz!
This is going to be relatively challenging code-golf challenge.
Input: Any URL, must have the protocol attached, e.g. http://codegolf.stackexchange.com (which will be our test case)
Output: A ...
44
votes
41answers
16k views
Make a PNG image with “Hello World!” with programming APIs, in the shortest code possible
So, I want you to make a PNG image that says "Hello world!" and nothing else on a distinguishable background using only an image making API (eg ImageMagick) and return the image. Fewest characters ...
12
votes
11answers
963 views
Render a version of the BBC Micro owl logo
http://en.wikipedia.org/wiki/File:BBC_owl.svg
Can you render out a version of the BBC Micro Owl logo as per above from code?
Rules:
You can use any programming language you like.
Output can be ...
12
votes
13answers
2k views
Generate a 1920 x 1080 graphic with 2,073,600 unique colours
Challenge:
Write a program that outputs a graphic file 1920 pixels wide by 1080 pixels high. Every one of the 2,073,600 pixels within the graphic must be a unique colour and no colour values should ...
12
votes
10answers
1k views
stupid restrictions and desert
So, you were sitting at your desk, golfing a program to calculate the first 20 digits of pi, and along comes your boss and throws your apple IIe out the window. You are now working on a new project ...
1
vote
5answers
700 views
Lua: Render a chess board in smallest code
I'm creating a simple challenge here as a first test of the community's reactions. Please let me know if this challenge is the kind of thing you guys like or what I can improve... :)
The task is ...
9
votes
3answers
604 views
Let's simulate a random snowflake
I saw this question on http://mathematica.stackexchange.com/ and I think it's pretty cool. Let's make the snowflake with other programming languages.
This is a quote from the original question:
...
9
votes
17answers
872 views
Histogram generation
Write the shortest program that generates a histogram (a graphical representation of the distribution of data).
Rules:
Must generate a histogram based on the character length of the words ...
1
vote
13answers
643 views
Generate a pentagram star
Your challenge is generate a pentagram like below, the star don't need filled.
Shortest code wins.
19
votes
47answers
3k views
Hello World window
Create a window that says hello world inside and nothing else. You can not have any ok or cancel buttons inside. It must be just a plain window that says hello world. I do not care about the contents ...
10
votes
3answers
413 views
Recreation of Piet Mondrian Composition
Good Afternoon,
Your goal is to, in the least amount of source code bytes, recreate any of Piet Mondrian's 'Composition' paintings (for instance, Composition 10)
The recreation can either use the ...
38
votes
9answers
3k views
xkcd challenge: “Percentage of the screen that is [x] color”
So I think we've all probably seen this xkcd comic:
:
This might either be too general or too difficult, I'm not sure. But the challenge is to create a program in any language that creates a window ...
2
votes
9answers
686 views
Display Scrolling Waves
The challenge is to display and scroll a sine waveform in the least number of characters.
Restrictions:
Total height of wave must be at least seven units (characters, pixels, etc).
The generated ...
5
votes
3answers
791 views
ASCII-visualize a graph
Your mission, should you choose to accept it, is to input a series of point pairs that form a graph, like this:
A,B C,A B,A A,D A,E F,G C,G
You must then output an ASCII visualization of the ...
7
votes
4answers
973 views
Breakout in half an hour
When I was a young teen I had a very boastful friend who claimed he could code up breakout (http://en.wikipedia.org/wiki/Breakout_(video_game)) in half an hour. Half an hour later he had done a great ...
4
votes
6answers
696 views
Cropping an image succintly
I am constantly frustrated by how complicated it is to write graphical programs that would have been only a few lines of code 20+ years ago. Since the invention of the mouse this has become even ...
15
votes
5answers
2k views
“Sorry, young man, but it's Turtles all the way down!”
Execute a Lindenmayer System
A Lindenmayer System (or L-system) is related to Thue and Post systems, and is used in botanical modeling and fractal generation.
An L-system is described by ...
7
votes
6answers
1k views
Generating PBM bitmap files from ASCII text
The PBM (Portable BitMap) format is a very simple ASCII black and white bitmap format.
Here's an example for the letter 'J' (copy-pasted from the wikipedia link):
P1
# This is an example bitmap of ...
31
votes
13answers
3k views
Generate the Stack Overflow logo
The challenge is to generate an image similar to the StackOverflow logo:
The output must contain:
Image size 64*64 or greater
A gray |__| shaped base
A curved segmented stack coming up from the ...
11
votes
2answers
2k views
Generate Newton fractals
You all know the Newton method to approximate the roots of a function, don't you? My goal in this task is to introduce you into an interesting aspect of this algorithm.
Newton's algorithm converges ...
11
votes
4answers
673 views
Help Mr Jones to enjoy his bicycle round-trip
Mr Jones wants to do a round-trip on his bicycle. He wants to visit several cities in arbitrary order, but his route must not cross it self, since he hates to be at the same place twice in his ...
7
votes
8answers
1k views
Output a playable crossword grid
Write a program to produce a file containing a crossword grid
that the user can print out and work the puzzle on.
Input
A filename representing a crossword grid file and
optionally a second ...
