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| A BYOAC Lightgun, are we up to it? |
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| ErikRuud:
Exactly! The HandVu system is tracking dozens of points on a hand, and trying to recognise gestures. The NOUSE sytem is track the nose and eyes. Both of these systems are tracking based on skin color and shape. They have to do a lot of calculations to determine what is a hand/head and what is not. For a gun system, you would be track a few bright points of light which is a lot easier. A single gun system wouldn't even need to scan in color, so the overhead is not as high as you might think. |
| sWampy:
--- Quote from: ErikRuud on March 08, 2005, 11:19:46 am ---Exactly! The HandVu system is tracking dozens of points on a hand, and trying to recognise gestures. The NOUSE sytem is track the nose and eyes. Both of these systems are tracking based on skin color and shape. They have to do a lot of calculations to determine what is a hand/head and what is not. For a gun system, you would be track a few bright points of light which is a lot easier. A single gun system wouldn't even need to scan in color, so the overhead is not as high as you might think. --- End quote --- Need to play with the camera a little and see how well they see IR Led's it might be possible to just have a pattern on the end of the guns (checker board on one, stripes on the other) shine a few ir led's at the players, and have it light up the targets enough for the where they can be tracked. |
| Silver:
Hmm, well I could be wrong about the cameras-not-a-hot-idea then. If you have the system to play with, can you try one of the constant-tracking gun games? I think Opwolf or T2? Would be interested to see - if it works fine, then hey - build your own gun this weekend! Also - as I'm still curious - could you take a look at cpu usage while constantly moving the sensor around in windows? I've always doubted the accuracy of these 1 camera systems too - especially if you move slightly since calibration. EDIT: And there is not much shortage of these camera trackers: http://www.naturalpoint.com/trackir/index.html http://www.naturalpoint.com/smartnav/ This TrackIR already just works on 1 reflective dot so maybe simpler than the nose-trackers. And you can just stick a reflective dot on your arcade guns.... |
| ErikRuud:
Take a look at the TrackIR 3. It uses a three point reflector to give a full 6 degrees of freedom. That is the closesedt I have seen to how I think the gun system could work. All it needs is a way to register a trigger pull, and calibration mode so that it knows where the edge of the screen is in relation to the gun. |
| Silver:
Looks very nice (if expensive). I notice that they have withdrawn generic mouse support in recent drivers, and only support particular games in the drivers - there is no full directX input. The trigger pull is just a button - so stick the detector in the front of the gun, and wire the button microswitch to your ipac/keyboard hack/keywhiz. The biggest issue for me is no 2 players - that would require either a driver rewrite to track 2 points (and not get confused) or 2 systems on a different IR frequency or pulse timing (I notice they use LED IR tracking in this system - they just use a camera to detect the points rather than IR LDRS) Hmm This suggests writing a driver to track 2 points by 1 camera is quite do-able - different shaped detector point or something. I still like the idea of building-your-own from scratch though. I'm going to keep looking for the IR LED/LDR/PIC approach... |
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