picking without mouse coordinates

Is there a way to do picking without using the mouse coordinates??

I have preknown coordinates for my object that I´d like to check which polygon it corresponds to. But with picking it depends on the mouse cursor. Or it changes the coordinates to screen coordinates…

/grodslukaren

Hi,
On my site :
http://ibelgique.ifrance.com/Slug-Production

“Download” section. I’ve alittle example for using pickinkg with the mouse.