The !IFS Application is an Iterated Function System Fractal Generator for the Acorn RISC OS computer environment.

!IFS is freeware, and is available for free download.

After having downloaded and unzipped the !IFS Application, drag the application to a suitable directory on your hard disc. Double click on the !IFS file icon to load the application onto the icon bar. There might be a (slight) delay in 'loading'.

Please read the Included Text File 'ReadMe', for conditions of use.

Select 'Help' option from the bar icon menu for more information. Should be 32-bit compatible.

Also from the bar icon menu, select the pattern that you wish to generate.

The application uses 'affine' mappings/transformations, of the form x(n+1)=a.x(n)+b.y(n)+c, and y(n+1)=d.x(n)+e.y(n)+f, where the a, b, c, d, e and f are randomly selected from a set of such mappings, for n=0, then 1, then 2, etc. The process is 'iterated' by starting at a point in the centre of the window, choosing a mapping, and using it to generate a new point, before randomly choosing another mapping, from the set supplied, and mapping again to yet another point, and so on.

The 'pattern' is generated by plotting the points, one at a time, until they start to make up a 'shape', which is 'recursive'/'fractal', in some sense, because it has copies of itself, within itself, then copies within those, etc.

Version 2.00 now allows of a 'custom', user-defined set of up to ten affine transformations. Choose 'Custom...' from the bar icon menu, and supply your own values in the panel, presented to you, then click on the 'OK' button.

Click on Icon to DownLoad Zipped Acorn Application !IFS Version 1.00 Dated June 5th 2012.

Click on Icon to DownLoad Zipped Acorn Application !IFS Version 2.00 Dated June 12th 2012.

NB. Please change the downloaded compressed IBM File extension from '.zipped' to '.zip', and the Acorn File type to 'Archive' in order to decompress.