Passing Actor position data to expression editor

mouldysoul

Hi

I adapting this patch emulating chemotaxis, and the basic principle is actor 1 chases the mouse around the screen. Say for instance I wanted to use a different actors position data, one on a random path, I can't seem to work out how to send the position data or use another actors attributes. Am I approaching this the wrong way?

Here is the file: http://www.mediafire.com/download.php?7jp43yvo3auxq8e

For background on chemotaxis, see: http://www.mit.edu/~kardar/teaching/projects/chemotaxis(AndreaSchmidt)/index.htm

This is how it is:

magnitude( game.Mouse.Position.X - self.Position.X, game.Mouse.Position.Y- self.Position.Y)

this is how I would like it to be:

magnitude( Actor 2.Position.X - self.Position.X ,Actor 2.Position.Y- self.Position.Y )

But it's not letting me decide to pick Actor 2's position, should I pass the data through another means?

mouldysoul

Sorry think I worked it out, make two new attributes and then do change attribute in the second actor, self.postion.x to game.newattributex, then I can link the data back to the expression in the first actor!

I will have a fiddle, haven't made it work but think I'm in the right direction!

RThurman

Yes -- you have it. It would look like this:

Change Attribute: game.newAttributeX To: self.Position.X
Change Attribute: game.newAttributeY To: self.Position.Y

You could also use a constrain attribute behavior to get a continuously updating position.