soil texture triangle

 Hello everybody,
     I need to show the soil texture triangle, example: http://courses.soil.ncsu.edu/resources/physics/texture/soiltexture.swf, in a report.
The graphic depends on three parameters: sand, clay and silt

Anyone knows how to do it? Anyone knows a tool to generate the images that later I could embed in the report?

I use Oracle Reports 6i.

Thank you very much,

     Jordi