XFFT (where X stands for crystal and FFT for Fast Fourier Transform),
is a small GUI program intended to demonstrate properties of the Fourier
transform (FT) interactively in introductory crystallography courses.
Two-dimensional data (polygons, pictures, lattices, Gaussian distributions) are transformed by a combination of operators (FT, convolution, addition, multiplication) and the results are ultimately displayed. Thus, numerous phenomena, such as truncation ripples, can be demonstrated interactively.
The sofware features full undo and load/save support and a multi-document interface.
This software is based on Qt and FFTW and is licensed under version 2 of the GPL. A handful of icons were adapted from the Breeze KDE theme.