Re: [Java-player-users] problems using blobfinder

[Alberto A. <ame...@IC...>]

Hi Radu,

Thanks a lot, now it works. If you have a minute to briefly explain the 
threading trick, that'd be great. Or maybe you can point me to some doc.

A couple of notes:

* I had to do the request for the blobfinder interface in mode 'r', mode 
'a' causes a segmentation fault, so
"BlobFinderInterface bfi = robot.requestInterfaceBlobfinder(0, 'r');"

* I have tried to track a particular color, but it didn't work. For 
example for orange:
"bfi.setTrackingColor(255,255,128,128,0,0)" but the blobs are still the 
same as without that line. I mean that's no big problem, then I just 
have to go through the blobs and look for the orange one. Probably that 
line is not enough, because on the client I get a "Need to handle a EAR 
message", and on the server "PlayerQueue::Push(): trying to push from 
non-allocated queue".

Best,

Alberto


Radu Bogdan Rusu wrote:

> Hello Alberto,
> 
> Sorry for replying so late (hmm, looks like I'm the only one actually 
> doing that on this mailing list :)). I just uploaded a basic Blobfinder 
> example to the Javaclient examples web page. Maybe that will help.
> 
> Please modify your source code according to the following guidelines, 
> and try again:
> - before the while (true), add a line like "robot.runThreaded (-1, -1);"
> - remove the "bfi.readData();" from the main while loop;
> - add a delay such as "try { Thread.sleep (100); } catch (Exception e) { 
> }" in the main while loop.
> 
> I don't know about Gazebo, but I will have a look.
> 
> Best regards,
> Radu.
>