rybus / pircle

C program to draw prime numbers on a circle

Plot prime numbers on a circle

Primes numbers are shown circularly with the following algorithm:

• let n a prime number, starting at 2.

• let displayed_prime the number of primes already on the circle

• plot n, at the following polar coordinates:

  • r, the radius, n/20 (20 here is a zooming factor)
  • θ the angle, (n * 2 * π) / (displayed_prime - 1);
  • increase displayed_prime
  • go to next prime number following n

Screenshot

Compile and execute

sudo apt-get install libsdl2-dev
git clone [e-mail]:rybus/pircle.git
make
./main X Y

• X is the number of primes you want to display
• Y is the expension factor for the spiral (use 1)
• the file primes.txt contains the list of the first million of prime numbers

Generate prime numbers

./main generate X > primes.txt

X is the number of prime numbers you want to generate.