Placing data into Setpos [ ]

["rwege@xxxxxxxxxxxxxxxxxxxxxxx" <rwege@xxxxxxxxxxxxxxxxxx>]

Hi mwforum,

I am working on Dynaturtle, which is a spacecraft simulation
wherein the turtle drifts independent of the heading and it
responds to "kicks" of the engine in the back. Speed and
direction are controlled by the force vector produced by the
engine. I am translating an old Apple II version of this into
Microworlds EX and  some commands have changed, Setpos being one.
It used to be SETXY. It uses XCOR AND YCOR to develop data for
setting the position of the turtle at any point in time. I am not
able to make SETPOS take any data though. It will not accept
variables. For instance, it won't take SETPOS [:A :B], nor will
it take SETPOS [XCOR YCOR].
The question is: What is the syntax for getting data into the
SETPOS [] command?

Ralph Wege