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  #16   Spotlight this post!  
Unread 01-08-2006, 03:24 PM
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Re: autonmous corner or center

i read there is a white light that is used to score the balls in the corner goals. would it be possible to track the corner goals using the camera?
I am asking because using dead reckoning to find the corner goals might prove to be difficult.
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Unread 01-08-2006, 03:25 PM
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Re: autonmous corner or center

I think that with the cameras, there is potential for chaos during autonomous.

But, I guess it will all work out in some way
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Unread 01-08-2006, 03:43 PM
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Re: autonmous corner or center

Quote:
Originally Posted by blue_crew
i read there is a white light that is used to score the balls in the corner goals. would it be possible to track the corner goals using the camera?
I am asking because using dead reckoning to find the corner goals might prove to be difficult.
The corner goals are litterally right in front of you if you point your robot down field. Just point your and go forward. What's so difficult?

PS The camera won't track the corner goals, trust me.

PPS Listen to Tom, he's a bright guy.
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Unread 01-08-2006, 04:04 PM
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Re: autonmous corner or center

Quote:
Originally Posted by Nuttyman54
Well, atleast seeing the center goal will be easier. My only concern is that both light arrays are the same color, so if a robot gets turned around, it could score in the OTHER goal. So far, GDC hasn't told us what happens when a robot scores in the wrong goal during auto
My (entirely unofficial) interpretation of that: Balls are balls. If you hit their goal, they score points. Done deal.
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Unread 01-08-2006, 04:10 PM
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Re: autonmous corner or center

Quote:
Originally Posted by Ashley Christine
I think that with the cameras, there is potential for chaos during autonomous.

But, I guess it will all work out in some way
Considering that many teams will use them for center goal shots, theres a potential for chaos during every period...
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Unread 01-08-2006, 04:55 PM
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Re: autonmous corner or center

Quote:
Originally Posted by Andrew Blair
Considering that many teams will use them for center goal shots, theres a potential for chaos during every period...
Very true, but humans will have a little more control, I see in autonomous all the bots going to similar or the same places trying to find the green, possibly quite a bit of collision. I guess that is where the bumpers come in!
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Unread 01-08-2006, 04:58 PM
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Re: autonmous corner or center

It depends on what your robot is good at. If you have no mechanism for shooting, you won't try for the center. Our group has decided to focus on the corner goals, both in autonomous and in normal play.
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Unread 01-08-2006, 05:09 PM
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Re: autonmous corner or center

Quote:
Originally Posted by Ashley Christine
I think that with the cameras, there is potential for chaos during autonomous.
All I know is that last year in Philadelphi, our camera locked dead onto MOE (Team 365) and their flourescent green shirts during the matches. They might want to consider what would happen if they get pelted with balls during the autonomous period!
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Unread 01-08-2006, 05:13 PM
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Re: autonmous corner or center

Quote:
Originally Posted by Greg Marra
All I know is that last year in Philadelphi, our camera locked dead onto MOE (Team 365) and their flourescent green shirts during the matches. They might want to consider what would happen if they get pelted with balls during the autonomous period!
LMAO! That would be kinda funny, other then the not safe part. But yeah!
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Unread 01-08-2006, 06:05 PM
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Re: autonmous corner or center

Quote:
So if you have a robot that shoots straight foreward, you just aim your robot at the high goal before the match starts, and then start shooting right when auto mode begins. As long as you've spent an hour or two ahead of time to make sure your robot shoots its balls at the right speed and angle, you don't have to worry about aiming...
Be careful about aiming your robot. There's a rule against using "any measuring devices while placing your robot that are not a permanant part of the robot", last year I used my shoe (it's exactly 12"), but I suspect this year that won't be allowed. If the ref decides you've lined your robot up against this rule, he's free to move/turn it at his discretion.
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Unread 01-08-2006, 06:22 PM
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Re: autonmous corner or center

Both goals being on the field should not be much of a problem, since it is unlikely that you will be pushed onto the wrong side of the field, and your robot will know what position it is starting in.

The green targets are roughly 10ft above the field, and if you are using Kevin's 2006 CMUCam code, you will be able to easily get the angle of your tilt servo, that angle becomes theta, from that you can do Tan(Theta) = (10/X) and solve for X. That reduces to X = (10 / Tan(Theta)). The field is 54' long, if you are >28ft away, you know that you are shooting onto the other side of the field.

It's not perfect, but it's unlikely that your robot will be pushed onto the wrong side of the field, and turned around. This is why it makes sense to have an onboard navigation system.

I’d really like to see our team design a bot capable of shooting into the center goal, the only real issue I can see is the hardware shooting device not being consistent enough to depend on it.
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Unread 01-08-2006, 06:59 PM
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Re: autonmous corner or center

Quote:
Originally Posted by Ashley Christine
LMAO! That would be kinda funny, other then the not safe part. But yeah!
While at kickoff I asked Woodie if there were any concerns about missed shots at the center goal hitting the operators or the controls. He handed me a ball and told me to throw it at him as hard as I could... How many times does an opportunity like that come up?
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Unread 01-08-2006, 07:30 PM
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Re: autonmous corner or center

The camera is absolutely esential to this game during both auton and manual mode. Thats the only way to constally keep track of the goal. Otherwise you would have to stop and postion the launcher so the ball goes into the hole. Think of doing this manually form over 30 ft away toward the other end away form you?
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Unread 01-08-2006, 09:07 PM
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Re: autonmous corner or center

Yes, the camara would be nice to use in the manual 2 minutes, but then you are relying totally on the camara. our team was thinking of something where the camara would give some kind of feedback, whether or not the position of the "cannon" would make the shot.
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Unread 01-08-2006, 09:29 PM
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Re: autonmous corner or center

Center goal. All 10 in less then the 10 seconds.

I just don't know how to do it yet.

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