Thank you very much Michael. Your information is a big help.

(The reference book placed such an emphasis on Points and vectors being different...)


I should have said "scaling a vector" by multiplying it by a number, not scalar product...

I need to have a look at the Moi idl file. I think windows is hiding it...

One script coming up, in a week or a month, or ... :-)

Edit: (I meant the David Morrill documentation.)