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Messages - Ringer

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1
Programmers Den / Re: Wiimote Drivers
« on: August 26, 2008, 05:23:57 AM »
Bump for great justice

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Other / Re: Suitable alternatives to an LED array?
« on: August 26, 2008, 05:21:02 AM »
Fire.

Light a bunch of candles. They give of IR light. It's great for testing, but not very concentrated.

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Other / Re: I Built An IR Array That Didn't Work
« on: August 26, 2008, 05:16:38 AM »
Has anyone managed a plug-in power source? I tend to electrocute myself anywhere near a wall socket, and especially now that I live in Europe (220 V; ouch) I'm not doing it until I know what I'm doing.

UndCon, you mentioned using an old router adapter/cord for AC to DC, right? Notes?

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Other / Re: Custom sensor bar as IR Array possible ?
« on: August 26, 2008, 05:13:57 AM »
Update (sort of): two arrays of eight LEDs each can be tracked VERY well if they're directly aimed at the Wiimote (as opposed to reflection). That's what I have, and I feel it's overkill. I think Johnny got the head tracking glasses to work with just one LED on each side of the head at considerable distance, too.

If you're planning on holding the Wiimote and using it the "intended" way, then reflection isn't an issue, and a sensor bar is the way to go, so disregard what I said earlier. I hadn't considered that. In that case you can probably do it with, like, four.

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General Hardware Talk / Re: Rapid X, Y, Z detection?
« on: August 26, 2008, 04:25:09 AM »
I've pretty much turned over this method (attaching hardware to the body) in favor of regular Wiimote altercations. I think infrared lights could be the key to better detection after all. If IR LEDs are on the body (knees and hands, I guess) and the Wiimote is aimed the waist, there's a good chance it could track everything. I read that the Wiimote's camera can track four points at a time... But can it track them accurately and distinguish them, or does it truncate their positions to two points? And what's the lens angle of this thing?

Of course, I'll run into testing this soon enough, but if you already know how the camera sends point data (especially if four coordinate pairs are passed), you can give me a very quick answer!

If the Wiimote isn't naturally up to the task, I'll have to (read: get to) use my own hardware for detection, like these guys. And as the whole community seems to, I encourage you to try it yourself! Most of my "free" time gets tied up otherwise, so as much as I want to see this turn out, I might not be able to build a dozen experiments.

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General Hardware Talk / Re: Rapid X, Y, Z detection?
« on: August 25, 2008, 06:17:25 PM »
I'll try to implement sea level in my prototype.

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Programmers Den / Wiimote Drivers
« on: August 18, 2008, 07:48:22 PM »
Advance apology for the forum choice - didn't seem to be one specifically for software, but I'm all for condensing it anyway.

My question: What driver should I use?

Potential answers: There's a comprehensive looking list of drivers here.

Factors that should narrow it down:
  • I'm running Windows
  • I'm used to OOP like C++/Java
  • I haven't bought a Bluetooth device yet
  • Main function: game development

Furthermore: are certain devices limited to certain drivers? I imagine so. Everyone might as well just post exactly what they use.

8
I don't know of any 24-pin connector; it seems like a much better idea to use a Wiimote because it's Bluetooth-enabled and can easily send to a USB receiver, but if you can make one with your own parts, it's likely cheaper and has the potential to be mass-produced (which I'd love to see).

Experiment with the connection to see what data is output. I'm no expert, but maybe you can make your own circuitry to react to the different pins' currents? That data sheet is your best hope, or maybe you should contact the manufacturer on that website.

If you scan (or translate) the data sheet, we can probably better help you : )

9
Project Ideas / Re: MOTION CAPTURE USING WIIMOTE
« on: August 09, 2008, 09:25:42 PM »
I've been pondering this one a bit, and the real problem seems to be angle. If you put small patches of reflective material on your body, they'll lose the reflective angle most of the time.Covering your body in a reflective medium would be expensive and too overwhelming to detect fine motion. Bands of it around your wrists, ankles, and head? Maybe. Not sure why you'd need four wiimotes; I didn't think one wiimote had a limit to how many points it could track. Am I wrong?

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Other / Re: Custom sensor bar as IR Array possible ?
« on: August 09, 2008, 09:12:57 PM »
http://en.wikipedia.org/wiki/Wii_Remote#Sensing
The Wii Sensor Bar has 10 LEDs.

Your homebrew LEDs have to shine and reflect, so the operational distance is effectively halved, and some light intensity is lost in the reflection depending on surface and absorption. 6-8 isn't enough unless they're really powerful, or you're really close. I recommend buying a whole bunch and making an array of plenty more, like in the video (which has 100). If you can pull off the minimalist one, let us know, though!

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Other / Re: Building a IR Array
« on: August 09, 2008, 08:15:05 PM »
Aaaand I want answers to these exact questions too! I'm surfing for specs...

12
Project Ideas / Re: Wiimote Accuracy and Precision Study
« on: August 07, 2008, 06:05:02 PM »
Nothing formal I know of, but I've seen a YouTube video claiming the WiFi range of the Wiimote is something like 400 feet. However, that's to send the signals; to detect the infrared lights, the Wiimote is nearly unusable after 15-20 feet. That's just personal experience, and only regarding the packaged Wii sensor bar. With a more powerful light source, the Wiimote could 'see' from farther away (although a larger source would reduce accuracy). The ultimate homebrew limit is then the WiFi.

As for accuracy/precision, it's situational. The way the Wii console reads the Wiimote, it's very, very precise at ideal angle and distance. Can't give you numbers, though. I'm not sure how you could measure the accuracy of input data itself - I mean, how can you be sure the measurement tool is any more accurate than the Wiimote? On that note, the Wiimote probably makes a good enough tool for detecting orientation to merit actually being the measurement tool.

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General Hardware Talk / Rapid X, Y, Z detection?
« on: August 05, 2008, 08:01:16 PM »
I'm a programmer / game developer, but I don't know much about hardware. I'd like to know what sort of device would be best for continuous (at least 30hz) positions relative to a sensory origin. I'm talking about several (four or more) wireless devices passing very small data packets (XYZ coordinates with double precision means 24-bytes per frame, per device), presumably via WiFi. To hell with the accelerometer or buttons. The main shortcomings, as with most consumer technology, are price and size: devices similar to what I describe are a bit too expensive (ideally under $10 each), and a bit too large (ideally smaller than matchbooks).

The Wiimote, unfortunately, does not satisfy these needs. It communicates its position relative to the screen via infrared detection, and must be pointed at the screen to work properly.

My goal is a difficult one, and it sounds like it's from a space opera or comic book. I want to attach several of these nodes to someone's body as a form of HIDs - really advanced/immersing gameplay, if achieved. In fact, nothing short of breaking new ground in the video game industry.

I know the technology do do exactly this has been around for at least a decade; however, it has only been used in academic contexts - expensive and nonstandard. Now, finding a homebrew means of achieving such an input method is likely within reach. I have come to this project in my zeal. You guys have the knowledge and, likely, the resources. Can this be done?

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