Multiple Vision Targets using GRIP

[soundfx]

The findContours method used by GRIP should generate a list of contours (MatOfPoint), and it shouldn't be limited to just one contour. I'm not too familiar with grip generated code, but you should be able to modify it if needed to either get the full list of contours or get the first and second contours.
Our team has an example based off of grip's generated code that allows getting the full list of contours here. You can tune that to accept both contours.

[RileyC3826]

Originally Posted by soundfx

The findContours method used by GRIP should generate a list of contours (MatOfPoint), and it shouldn't be limited to just one contour. I'm not too familiar with grip generated code, but you should be able to modify it if needed to either get the full list of contours or get the first and second contours.
Our team has an example based off of grip's generated code that allows getting the full list of contours here. You can tune that to accept both contours.

Okay, so I've looked at the code you provided and I can modify it so that it is using the same values for detecting the target, but could you provide an example on how I would get that list of contours to use in the rest of our code? I attempted to use
System.out.print({Class}.getContours());
but that ended up printing out nonsense:
https://postimg.org/image/nboabyidr/
Thanks,

[RileyC3826]

I believe I have found the solution. I ended up modifying the code here:
https://wpilib.screenstepslive.com/s...-robot-program
I duplicated the statement that defines rectangle 'r', changed the second one to 'q', then changed the '0' in 'filterContoursOutput().get(0)' to a '1'. I also changed centerX to two different variables, one for rectangle r and one for rectangle q. My problem now is that sometimes, when running the robot, the values from the contours just suddenly stop, and will not update until I redeploy. I believe that for some reason, the visionThread is being stopped. If I try to use visionThread.start() somewhere in the program (besides robotInit), the program crashes (we suddenly lose robot code and comms in the driverstation). Anyone have an idea how I can resolve this issue?