IOCCC image by Matt Zucker

The International Obfuscated C Code Contest

2024/tmarrec - Prize in cyclonic coding

3D tornado simulation

← 2024/straadt ↑ 2024 ↑ 2024/tompng → C code Makefile Inventory Original C ✓

Author:

• Name: Tristan Marrec
  Location: CA - Canada

Award presentation:

Watch the Our Favorite Universe YouTube show for this entry:

IOCCC28 - 2024/tmarrec - Prize in cyclonic coding

To build:

 make all

To use:

 clear; ./prog

Try:

 ./try.sh

Alternate code:

The original submitted entry was flickering when executed. This alternate code implements the original level of flickering.

The original submitted entry was flickering when executed. We added code to stop that. After adding this to the compile line:

 -DQ='fputs("033円[H",stdout);'

We changed the source as follows:

 make diff_alt_prog

Alternate build:

 make alt

Alternate use:

 ./prog.alt

Judges’ remarks:

This prize in cyclonic coding will certainly twist your perspective on C code.

This is not your garden variety tempest in a teapot. It’s a tornado in a window!

Author’s remarks:

3D fluid simulation

 advection=semi-lagrangian scheme
 projection=pressure solver with neumann boundary condition
 linear solver=gauss-seidel relaxation
 rendering=ray marching

Primary files

• prog.c - entry source code
• Makefile - entry Makefile
• prog.alt.c - alternate source code
• prog.orig.c - original source code
• try.sh - script to try entry

Secondary files

• 2024_tmarrec.tar.bz2 - download entry tarball
• README.md - markdown source for this web page
• .entry.json - entry summary and manifest in JSON
• .gitignore - list of files that should not be committed under git
• .path - directory path from top level directory
• index.html - this web page

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