hp
jblog
toc

JClock VII

2015-11-14, post № 81

programming, Pygame, Python, #clock, #composite, #composite number, #factorization, #prime, #prime factorization, #prime time, #primes

This alternative clock is not really readable by human. It calculates the first 𝟣𝟦𝟦 [1] primes, assigns 𝟨𝟢 of them to every possible second, 𝟨𝟢 to every possible minute and 𝟤𝟦 to every possible hour.
Multiplying those three primes for a given time results in a composite number representing said time. Using integer factorization, you then can get the three primes back, map them to seconds, minutes and hours, and by doing so calculate the time.

jclock-vii.gif
Extra assets: jclock-vii_extra.gif

JClock VI

2015-11-08, post № 80

programming, Pygame, Python, #clock, #clockface, #simple, #time

This clock uses a simple clock design with the standard clock face. Red, green and blue represent second, minute and hour.

jclock-vi.png
Source code: jclock-vi.py

Prime Remainders

2015-11-07, post № 79

mathematics, programming, Pygame, Python, #%, #black, #mod, #modulo, #red

This program calculates primes, takes their remainder [1] and then places a color accordingly. The shapes are quiet interesting. [2]

Controls

  • ‘Space’ takes a screenshot.
prime-remainders_mod-10.png
prime-remainders_mod-255.png
prime-remainders_mod-500.png
Source code: prime-remainders.py

Langton’s Ant

2015-11-01, post № 78

mathematics, programming, Pygame, Python, #ant, #black, #black and white, #crawling, #highway, #Langton, #white

This program is a simulation of Langton’s Ant. The following image shows the ant on its highway.

Controls

  • ‘F1’ takes a screenshot,
  • ‘Space’ stops and resumes the ant’s movement.
langtons-ant.png
Source code: langtons-ant.py

Halloween

2015-10-31, post № 77

art, #animated, #animated gif, #animation, #gif, #Halloween, #pixel, #pumpkin, #scary, #spooky

This gif is dedicated to the year’s scariest date, Halloween.

halloween.gif

Spiral

2015-10-25, post № 76

programming, Pygame, Python, #around the center, #black, #black hole, #emission, #galaxy, #particles, #red, #Slow Mo Guys, #slow motion, #spin, #spinning

Inspired by a recent Slow Mo Guys video, I wrote a simulation for the shown effect. I think it looks pretty neat…

Controls

  • Up arrow increases the number of emitted particles,
  • Down arrow decreases the number of emitted particles,
  • ‘Space’ saves a screenshot.
spiral-1.png
spiral-2.png
spiral-3.png
Source code: spiral.py

𝑒 Generator

2015-10-24, post № 75

mathematics, programming, Python, #(1+1/n)^n, #approx., #approximation, #constant, #e, #Euler

By using the formula \big(1+\frac{1}{n}\big)^n for a big number 𝑛, you can approximate the mathematical constant 𝑒.

e-generator.png
Source code: e-generator.py

c’t-Racetrack

2015-10-18, post № 74

games, programming, Pygame, Python, #acceleration, #c't, #car, #mouse, #mouse controlled, #position, #race, #ractrack, #track, #vector, #velocity, #vertrac't

In a recent c’t article [1] they showed a game regarding vector mathematics, velocities, accelerations and positions.
I could not resist and wrote this program to simulate the game.
The only thing this program cannot do is to check the barriers. That you have to check for yourself.

The Game

You have a start position (red), an end position (green) and some barriers (white).
Your job is it to steer your little dot (bright yellow) onto the end position.
To make it more difficult, you are not allowed to change the dot’s position directly, but rather you accelerate it on each step.
Your acceleration vector (turquoise) also is not allowed to be longer than 𝟣𝟢 (dim yellow bubble) and at the end point your dot must have a velocity of (𝟢, 𝟢).

The fewer moves you need, the better your steering abilities.

ct-racetrack-2.png

Controls

  • Mouse movement changes the new acceleration vector applied in the next step,
  • Left click moves one step,
  • Right click is a undo for the latest move,
  • Middle click moves the frame,
  • ‘c’ clears all the moves made so far,
  • ‘e’ exports current moves to a .txt file,
  • ‘Space’ saves a screenshot.
ct-racetrack-5.png
Source code: ct-racetrack.py
Jonathan Frech's blog; built 2021/10/02 17:36:09 CEST