This tool shows the circuit of the Fast Fourier Transform for an input of 8 complex numbers (i.e. a polynomial of degree 7). The user can modify with the mouse the input, and see in real-time the output of the FFT algorithm.
As shown in the screenshot, the complex numbers are shown as vectors in the plane (defined by the real and imaginary coordinates).
- The user can change the input values by dragging the vectors (the vectors in the left-most colmun)
- The tool shows all the intermediate values. Each intermediate value is the sum of the displayed vectors. The output of the whole circuit is the right-most column.
- Hovering on intermediate steps shows the computation of the intermediate values. The equation is shown in the top-right corner of the screen.