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A Closer Look At The AimTrak (with video goodness)
Ginsu Victim:
See, I told you I didn't know the technical side. ;D
AndyWarne:
--- Quote from: RandyT on October 22, 2009, 02:09:31 pm ---
Of course, it really isn't important to know which is which, unless one needed to fire off-screen to the bottom or top.
--- End quote ---
It is necessary to know which one its looking at. It is a pre-requisite that the gun needs to work even if it can only see one of the groups of LEDs, otherwise the field of view of the device is greatly reduced, which means you have to be much further away. This is the problem with the Topgun.
Actually I have tried something like this as part of the development, having two LED bars, and making an educated guess which one it could see, if it could see only one. There are two problems, firstly it gets the guess wrong in certain movements such as moving off screen, around the edge and back on screen again, and also there is a jump when it transitions from referring to the first, both, or second bar, which cant be fully eliminated.
I spent 9 months researching the raw sensing solution and I believe I covered all options.
If the min distance limitation is taken out of the requirements, all kinds of options are possible.
bkenobi:
I'm intrigued by the wide angle lens mod for the Topgun. Would something like that work for this camera? Most guncons that people are looking at have a lens to start with, so would using that (or more likely a better lens) to see more of the screen from closer up help? I know it would distort the camera's image so a firmware upgrade might be needed (or not if the calibration somehow worked like in the case of the Topgun).
RandyT:
*edit* I'm going to pull back on this until I can flesh this out some more with some diagrams. I think I see what the issue is based on the way this is designed.
RandyT
KissMyWookie:
--- Quote from: AndyWarne on October 23, 2009, 02:01:21 pm ---
--- Quote from: RandyT on October 22, 2009, 02:09:31 pm ---
Of course, it really isn't important to know which is which, unless one needed to fire off-screen to the bottom or top.
--- End quote ---
It is necessary to know which one its looking at. It is a pre-requisite that the gun needs to work even if it can only see one of the groups of LEDs, otherwise the field of view of the device is greatly reduced, which means you have to be much further away. This is the problem with the Topgun.
Actually I have tried something like this as part of the development, having two LED bars, and making an educated guess which one it could see, if it could see only one. There are two problems, firstly it gets the guess wrong in certain movements such as moving off screen, around the edge and back on screen again, and also there is a jump when it transitions from referring to the first, both, or second bar, which cant be fully eliminated.
I spent 9 months researching the raw sensing solution and I believe I covered all options.
If the min distance limitation is taken out of the requirements, all kinds of options are possible.
--- End quote ---
Sorry, I assumed that with 4 "L" shaped emitters, the LEDS's on each corner emitter would be a fixed distance apart. The gun logic would calculate the pointer position based on the distance between the LED's on the visible corner and not the distance between all 4 corners... think of it as enhancing the way the Aimtrak currently works by adding extra emitters (and so letting the position be calculated if the top of the screen is not necessarily visible, but can work with just one corner visible).
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