Frequency synthesis example

The example below is a Java applet which calculates a fractal fBm surface based on the inverse Fourier transform and displays it as a grayscale image. The image wraps around in both x and y. The source code is adapted from John Walker's 'ppmforge' program (part of the PBMPLUS toolkit). PPMFORGE is also the distant parent of John Beale's GFORGE program.

	This example illustrates simple spectral synthesis. The parameters for this image are intended to evoke a planetary surface.
	This example illustrates simple spectral synthesis. The parameters for this image are intended to evoke a cloudscape.

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