FORTRAN 77 library

The source code of the quadraturerules FORTRAN 77 library can be downloaded from the latest release on GitHub.

The library's tests can be built by running:

gfortran test.f -o -std=legacy test
./test

Usage

The library's function siquad can be used to write the points and weights of quadrature rules for a single integral into an array. For example, the following snippet will create an order 3 Xiao–Gimbutas rule on a triangle:

Note that the points returned by the library are represented using barycentric coordinates.

Generating the library

The FORTRAN 77 quadraturerules library can be generated from the templates in the online encyclopedia of quadrature rules GitHub repo. First clone the repo and move into the library directory:

git clone https://github.com/quadraturerules/quadraturerules.git
cd quadraturerules/library

The FORTRAN 77 library can then be generated by running:

python build.py fortran77

This will create a directory called fortran77.build containing the FORTRAN 77 source code. This code can be converted to pictures of punchcards using the library fortran77punchcards.