Re: [simspark-devel] Problem with the vision perceptor (I think!)

[Joschka B. <jbo...@un...>]

On Mon, 2007-06-18 at 15:17 +0200, Jan Murray wrote:
[...]
> 
> >> If you label the flags with "my" / "opponent", this is a _semantic_  
> >> annotation of the flag that can't be found on the soccer field. The  
> >> vision perceptor should only deliver the syntactic label of the flag,  
> >> and the intelligence of deciding which side the flags belong to  
> >> should be in the agent, not in the simulator.
> > 
> > Wasn't there something like flipping the labels in the old simulator?
> > Maybe I'm completely wrong though, I didn't check...
> 
> I checked the visionperceptor of version 0.4. There all 
> (x/y)-coordinates were multiplied with -1 for the right team for the 
> static and dynamic axis percept. I think this goes back to the time 
> before we used the dynamic axis. In those days ;-) it was easier to say 
> the x-axis points towards the opponent goal.

Thanks for checking. I knew there was something, but I didn't remember
the details :-/

> What I didn't get from the previous discussion is whether only the 
> flag/goal labels should be flipped, or all positions should be flipped.

Yuan implemented flipping the flag/goal labels.

> >> So IMHO, flipping the labels should be removed from the perceptor,  
> >> and using "left" for the left flags of teams of either side isn't any  
> >> better than the original labels.
> 
> In this case we could perhaps replace left and right with yellow and 
> blue.  This avoids confusion if you move the camera round and the yellow 
> goal is on the right, suddenly.  ;) But then we should apply this to the 
> gamestateperceptor as well.
> 
> > OK, so we leave the old labels and remove the flipping?
> 
> This would be like 2D. IIRC the vision in the 2D simulator was exactly 
> as Oliver proposed.
> 
> I tend to agree with Oliver. It's easy for a team to implement a flip 
> based on their side, but it's (unnecessary) overhead for the simulator.

Since I also would like to limit the changes the teams have to do (I
actually do, hard to believe some times I guess ;-) ), I'd propose then
to keep the names we have now and remove the flipping again. Yuan, could
you take care of this, please?

Cheers,
Joschka