Re: [Visualpython-users] pass by value?

[Gary P. <pa...@in...>]

I got around this the following way.  I don't know if it always works:

pos = shape.pos + vector(0,0,0)

actually, up top I define zed=vector(0,0,0) and I add zed whenever there's
danger of reference problems.

-g
----- Original Message ----- 
From: "Richard Chapman" <ax...@ch...>
To: "vpython" <vis...@li...>
Sent: Sunday, September 21, 2003 4:29 PM
Subject: [Visualpython-users] pass by value?


> hi
>
> how do you make sure a variable a vector in this case: is passed by value
as
> opposed to passed by reference.
>
> i have a class and in the class i have a list of positions, now i have a
> function called addposition which takes in a item called pos. in the
> function call i set pos=shape.pos, but when i move my shape.pos to
something
> else eg shape.pos + vector(1,1,1) it changes all the positions i entered
> into the list to this value.
>
> how do i stop this happening
>
> thanks
>
> richard