Testing nec2++

Quick start

Build a debug binary, then run the regression harness against the reference engines:

# 1. Build nec2++ and the nec2c reference engine
cmake -B build -DCMAKE_BUILD_TYPE=Debug
cmake --build build -j$(nproc)

# 2. Build nec2c (C reference)
make -C c_src

# 3. Symlink the binaries where the Makefile expects them
ln -sf ../build/src/nec2++ ../src/nec2++
ln -sf ../build/src/nec2diff ../src/nec2diff

# 4. Run all tests (default: herzian_dipole.nec)
make

Running a specific test

make DO_TESTS=data/gh_flat_spiral.nec

Adding a test

Drop a .nec input file into data/. The harness will run it through nec2++, nec2c, and FORTRAN (if available), then diff the outputs with nec2diff.

Available test models

The data/ directory contains over 45 models covering dipoles, patches, helices, Sommerfeld ground, arrays, and more.