EXpreSSION quEstioN

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  02 February 2004
EXpreSSION quEstioN

Hi people,
Im trying to make an expression, but im not so good on it.
I wouyld like to know if someone could help me.
I need to move a bunch of objects at same time, same animation.

Ive a box wich I want to rotate on X..and Ive more 20 boxes called box1, box2, box3, etc...wich I want to be driven by the Box Master..

the expression is this one..


but this expression only moves the box1.. My question is, if have a way to type this


and the other boxes move..i dont need to type individuals expressions..

help meeeeeeeeeeeeeeeeeeee


:::EDMX Multimedia Artist:::
  02 February 2004
why don't you use connection editor instead?
  02 February 2004
i migth do that..
but i was trying to figure out if with expression could be better..

:::EDMX Multimedia Artist:::
  02 February 2004
one way would be to wrtite a snippet of code where you loop through writing the expression 20, or however many times is needed.

for ($i = 1; $i <= 20; $i++)
expression -s ("box" + $i + ".rotateX = mainBox.rotateX");

Just a basic for loop. The counter, $i, starts at 1 and as long as $i is less than or equal to 20 (or however many boxes you need to add the expression to) it will add an expression to each box. After the expression is written to box$i, $i increases by one ($i++) and as long as $i is still less than or equal to 20, it does it again.

For that code though, they need to be named box1, box2, box3, etc. If you wanted to do it with a selection, you'd have to modify the code a bit.

That code can either be placed within the expression editor, or it could be placed in the script editor and executed with the numPad enter.

Of course, as alesmav said, since you're just making a straight connection, the connection editor might be better. But never fear! You can loop that too!!

for ($i = 1; $i <= 20; $i++)
connectAttr mainBox.rotateX ("box" + $i + ".rotateX");

Again with the above loop, you could place it in the expression editor if you want, or you could just run it once from the script editor.

Good luck
Jared Hromika

To me Autokey is like soggy cereal. Sure it's more convenient because you don't have to chew it, but..... ewww. - Keith Lango
  02 February 2004
oooo a loopin solution
i might finally finish my script
Henrique BiG ThAnKs FoR CrEaTiN ThAt ThReAd

jHromika thanks for clearin up the loopin thing

  02 February 2004
... or you can just select the objects you want to connect and run the following script.


string $sel[0] = `ls -sl`;

for ($i = 1; $i < size ($sel); $i++)
connectAttr ($sel[0] + ".rotateX") ($sel[$i] + ".rotateX");


Be sure to select the "master" object first.

  02 February 2004
is it possible to create a chain of variables this way? (i mean the above )
like when i first time use the script the all the variables have number 1 in their names and when i use the script the second time they get number 2 in the names?

  02 February 2004
you can also do this in ONE expression:

box20.tx=box19.tx= [...] masterbox.tx ;

where you should continue where the [...] is, next same for ty, tz
or whatever else. (actually it should've been rotate[?] never mind you get the point)


Last edited by brubin : 02 February 2004 at 11:41 AM.
  03 March 2004

hey guys..tanx very much for the answers...
the movie i was making went down...

but tanx a lot for all....


:::EDMX Multimedia Artist:::
  01 January 2006
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