This Python + Pygame program draws the trace of 4 decaying sine waves, 2 per axis, with rainbow colours. It generates a sequence of random harmonographs.
A harmonograph is a mechanical device typically seen in science museums, that has two …
Harmonograph in Pygame
You may have seen those devices at the Science Museum or Exploratorium or Techniquest… There’s a drawing surface and some arrangement of pendula with a pen touching the paper on the drawing surface, set in motion it draws these …
Stars and Stripes
A variation on the Stars and Stripes American Flag for Independence Day. It’s an exercise in the use of transparency in Pygame. The stripes are made transparent so the stars image behind shows through.…
Rainbow Flag in Pygame
This little Pygame program paints the Rainbow Flag, as used by the LGBT movement. It illustrates:
- Importing the Pygame library
- RGB colours in hexadecimal
- Python’s for loop using the enumerate() function
- Filling a rectangular area in Pygame
- Updating display
Fast Mandelbrot Set by QuadTree
Most Mandelbrot Set programs proceed along the display area, pixel by pixel horizontally, row by row from top to bottom. This one doesn’t. It divides up the screen into 6 horizontal squares in 2 rows, then for each one, checks …
Naive Mandelbrot Set
This is your basic Mandelbrot Set plotter. Very little effort made to speed it up, except for plotting top & bottom pixels together as they’re mirrored across the x-axis. Later I’ll show you some much faster programs!
The heart of …