The von Koch snowflake
This project generates a SVG file with a von Koch snowflake, using the cairo-fortran bindings as a fpm (Fortran Package Manager) dependency.
The classical recursive algorithm is used, each line segment being replaced by four segments.
Be careful with the number of recursions: the SVG file is growing like
Requirements and dependencies
You need:
- a modern Fortran compiler, for example GFortran or the Intel ifort/ifx compilers. See the Fortran-lang.org compilers page for other compilers.
- The Cairo development files (
libcairo2-devpackage in Ubuntu). - The Fortran Package Manager fpm.
Running the program
Just type fpm run and fpm will manage the dependencies and build and run the program:
$ fpm run
+ mkdir -p build/dependencies
Initialized empty Git repository in von_koch_snowflake/build/dependencies/cairo-fortran/.git/
remote: Enumerating objects: 23, done.
remote: Counting objects: 100% (23/23), done.
remote: Compressing objects: 100% (22/22), done.
remote: Total 23 (delta 0), reused 14 (delta 0), pack-reused 0
Unpacking objects: 100% (23/23), 82.99 KiB | 2.37 MiB/s, done.
From https://github.com/vmagnin/cairo-fortran
* branch HEAD -> FETCH_HEAD
cairo-enums.f90 done.
cairo-auto.f90 done.
von_koch.f90 done.
libvon_koch_snowflake.a done.
main.f90 done.
von_koch_snowflake done.
[100%] Project compiled successfully.
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6 recursions
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Output file: von_koch_snowflake.svg
----------------------------------Licenses
This project is licensed under the GNU General Public License version 3 or later.
The documentation is under the GNU Free Documentation License 1.3 or any later version. The figures are under CC-BY-NC-SA 4.0 license.
Cairo documentation
- https://cairographics.org/documentation/
- API Reference Manual: https://cairographics.org/manual/