Graph plotting in the terminal using braille characters

I recently made a program named tplot, short for terminal plotter.

It uses braille characters as software-based "subpixels", each character is a grid of 2x8 dots, making an average 80x24 terminal have 160x192 available dots for graphing.

It takes into in two input forms;

$ echo 1 1 | tplot

Which will draw a dot at position 1x1 on the grid.

It utilizes Bresenham's line algorithm to acceept input in form of ;

$ echo 1 1 to 25 25 | tplot

Which will draw a line from 1x1 to 25x25.

More advanced use

Lines and dots are fine and all, but you can advance upon it a lot with a small awk script.

$ awk -f - << EOF | tplot
BEGIN {
    pi = 3.14159;
    c = 50;
    r = 45;

    for (i=0; i < pi * 2; i += pi/10) {
        x = cos(i) * r;
        y = sin(i) * r;

        printf("%d %d to %d %d\n", c + x, c + y, c, c);
    }
}
EOF

Which will output something like; ^{depending on your font, this might be borked.}

                 ⢠      ⡇      ⡄
                  ⢇     ⡇     ⡸
           ⠱⡀     ⠘⡄    ⡇    ⢀⠇     ⢀⠎
            ⠈⢆     ⢱    ⡇    ⡜     ⡰⠁
      ⢄⡀      ⠱⡀    ⢇   ⡇   ⢰⠁   ⢀⠜      ⢀⡠
       ⠈⠢⢄     ⠘⢄   ⠘⡄  ⢇   ⡎   ⡠⠊     ⡠⠔⠁
          ⠑⠢⣀    ⠣⡀  ⢣  ⢸  ⡸   ⡔⠁   ⢀⠔⠊
   ⣀         ⠑⠤⡀  ⠘⢄ ⠈⡆ ⢸ ⢀⠇ ⢀⠎  ⢀⡠⠊⠁        ⣀
    ⠉⠑⠒⠤⢄⣀     ⠈⠒⢄  ⠣⡀⠸⡀⢸ ⡜ ⡰⠁ ⡠⠔⠁     ⣀⡠⠤⠒⠊⠉
          ⠉⠑⠒⠤⠤⣀⡀ ⠉⠢⢄⠑⢄⢣⢸⢰⢁⠜⢀⠔⠊  ⣀⡠⠤⠒⠊⠉
                ⠈⠉⠒⠢⠤⣑⡪⡪⣾⣮⡪⣊⡡⠤⠒⠊⠉
  ⠒⠒⠒⠒⠒⠒⠒⠒⠒⠒⠒⠒⠒⠒⠒⠒⠒⠒⢒⣒⡺⣿⣿⡿⡿⣒⣒⠒⠒⠒⠒⠒⠒⠒⠒⠒⠒⠒⠒⠒⠒⠒⠒⠒⠒⠂
              ⣀⡠⠤⠔⠒⠉⣁⠔⡪⢪⢻⢫⢪⠒⢄⠉⠑⠒⠤⢄⣀
       ⢀⣀⠤⠔⠒⠊⠉   ⢀⠔⠊⢀⠔⠁⡎⢸⠘⡄⠑⡄⠉⠢⢄   ⠉⠉⠒⠢⠤⣀⡀
   ⠤⠒⠊⠉⠁      ⢀⠤⠊⠁ ⡠⠊ ⡸ ⢸ ⢱ ⠈⢆  ⠑⠢⣀      ⠈⠉⠑⠒⠤
           ⢀⡠⠊⠁  ⢀⠔⠁ ⢠⠃ ⢸  ⢇  ⠱⡀   ⠑⠤⡀
        ⢀⡠⠒⠁    ⡠⠊   ⡎  ⢸  ⠘⡄  ⠘⢄    ⠈⠒⢄⡀
      ⡠⠔⠁     ⢀⠔⠁   ⡸   ⢸   ⢣    ⠣⡀     ⠈⠢⢄
             ⡠⠊    ⢠⠃   ⢸   ⠈⡆    ⠘⢄
           ⢀⠔⠁     ⡎    ⢸    ⠸⡀    ⠈⠢⡀
           ⠊      ⡸     ⢸     ⢇      ⠑
                 ⢠⠃     ⢸     ⠘⡄
                        ⠘

If you're interested, you can take a look at the source on github.^{don't worry it's only ~120 lines}