LIBFFT(3)

Link with -lfft.

LIBFFT is a signal-processing library for performing Fast Fourier Transforms (FFTs) and inverse FFTs efficiently. It provides forward and inverse one- and two-dimensional transforms, including routines specialized for particular fixed transform sizes, operating on real and complex data.

The library defines a simple COMPLEX type consisting of real and imaginary double-precision components, and intentionally avoids a dependency on vmath.h so that it may be used as a standalone signal processing component.

The complete API, including data structures and function signatures, is documented in fft.h and in the Doxygen-generated reference for the LIBFFT module.

brlcad(1), libbn(3), libicv(3)

The BRL-CAD Doxygen API reference provides the authoritative, up-to-date description of all public LIBFFT routines.

BRL-CAD Team

This software is Copyright (c) 2004-2026 United States Government as represented by the U.S. Army Research Laboratory.

Reports of bugs or problems should be submitted via electronic mail to devs@brlcad.org