[R-sig-Geo] Transform 2or 3 raster with texture information in soil triangle classes.

[Swen Meyer]

Dear All,
does anyone maybe know a R script or a software tool that transforms a 
set of texture rasters (sand , silt , caly) into one classified raster 
according the German triangle ‘‘Bodenkundliche Kartieranleitung 1994. I 
know that SAGA GIS does have such a function but I think the results are 
classified according the USDA classification.
Thank you in advance,
Swen