Author Topic: Somes questions... :-)  (Read 3891 times)

Offline Asuka

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on: November 10, 2008, 12:40:34 AM
Hi everybody !
First, I'm sorry for my english, I'm French and young : my english is not perfect.  :D

I've seen somes videos about "Wiimote Whiteboard" and I think this is interesting.

But I'm not sure to understand everything... (I'm sure I don't  :) )

The trick is :
- The Wiimote is connected to the PC with Bluetooth. Look at a surface. (Whiteboard for exemple)
- The PC is connected to a Video Projector which send the Desktop image on the surface.
- We use an IR Pen to "write" on the Whiteboard, the Wiimote receive the IR Pen's position.
- The Wiimote send the information to the PC with the Bluetooth
- We use an emulation software to recognize the information gived by the Wiimote as a "cursor".


But I've got some questions, I've read some dock on website, but the English is not very easy for me... :)

- How the Wiimote understand when we're touching the Whiteboard and when we're simply moving the Pen in the air ?
- This doesn't work with every programs ? If it works like a "second mouse", it should ?
- How the relation between IR Pen and Wiimote does work ? The Wiimote has to see the IR Led ?
- Basically, when we're playing Wii, it's not the Wiimote that "send the position" to a captor ? Because, here, It's the IR Pen that send is own location to the Wiimote... I don't really understand.


So, I like this idea, I don't know if I'll try to do this at home (I don't really need) but I really want to understand the trick.  ;D
It would be great if somebody could answer me. After research, I don't find the answer for those questions, or the answers were ambiguous.

Thanks ! Have a nice day (It's 7h30 at home :p )



PS : Again, I'm sorry for my english, tell me if there's "Misspellings" or other wrong things.



Offline jamesKL

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Reply #1 on: November 10, 2008, 12:56:02 AM
You must use infrared pen in order for the whiteboard to work.

The wiimote is connected to the computer via bluetooth and it has an infrared camera which can detect infrared so whenever u move ur ir pen, the infrared camera can detect the location of the infrared, so by using the position of the infrared using x and y axis, the mouse cursor will be able to follow the position of the Infrared.

So the conclusion is that the wiimote contain infrared which is able to detect the location of the infrared  source...

Sorry for my poor english :)
« Last Edit: November 10, 2008, 12:57:55 AM by jamesKL »



Offline benpaddlejones

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Reply #2 on: November 10, 2008, 01:01:04 AM
Hi Asuka
I'll try to keep it simple.

Hi everybody !
First, I'm sorry for my english, I'm French and young : my english is not perfect.  :D
I won't hold it against you even though when I was last in France they arrested me for not having a visa! :D

The trick is :
- The Wiimote is connected to the PC with Bluetooth. Look at a surface. (Whiteboard for exemple)
- The PC is connected to a Video Projector which send the Desktop image on the surface.
- We use an IR Pen to "write" on the Whiteboard, the Wiimote receive the IR Pen's position.
- The Wiimote send the information to the PC with the Bluetooth
- We use an emulation software to recognize the information gived by the Wiimote as a "cursor".
Yes!

But I've got some questions, I've read some dock on website, but the English is not very easy for me... :)
Me either, I'm Australian

- How the Wiimote understand when we're touching the Whiteboard and when we're simply moving the Pen in the air ?
It doesn't. If you have IR-Pen away from calibrated surface (whiteboard) will give incorrect location.

- This doesn't work with every programs ? If it works like a "second mouse", it should ?
It works exactly like a mouse. Will work in nearly every program. If you find one that it does not work post your problem to this forum and we will try to solve it.

- How the relation between IR Pen and Wiimote does work ? The Wiimote has to see the IR Led ?
This will be difficult with language barrier, here we go:
Wiimote has a very special camera that can detect light and track light in space. The filter (red plastic on end) filters light so only light wavelength of 940nm can go through filter. The Wiimote is capable of detecting 4 IR-Blobs at once.

- Basically, when we're playing Wii, it's not the Wiimote that "send the position" to a captor ? Because, here, It's the IR Pen that send is own location to the Wiimote... I don't really understand.
Nitendo Wii:
Works by holding Wiimote, the Wiimote follows the IR-Light from the sensor bar as Wiimote is moved in your hand and sends information back to Wii console and you play game.
Wiimote Whiteboard:
Wiimote is still and IR-camera is calibrated to surface. If camera see's an IR-Source (your IR-Pen) it calculates IR Location then sends to computer via Bluetooth. Software converts this message to location on screen and runs the command (usually right mouse click).

PS : Again, I'm sorry for my english, tell me if there's "Misspellings" or other wrong things.
As I said I'm Australian who am I to correct your English, mine sucks too

Hope this helps

benpaddlejones :)


See my full profile and links on my Google Profile: http://www.google.com/profiles/benpaddlejones


Offline Asuka

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Reply #3 on: November 10, 2008, 10:30:57 AM
Thanks for answering my questions.

My apologize for the visa  ;D.

I understand for the Wavelength.

- How the Wiimote understand when we're touching the Whiteboard and when we're simply moving the Pen in the air ?
It doesn't. If you have IR-Pen away from calibrated surface (whiteboard) will give incorrect location


I didn't want to say that... I understand when we're pointing the 4 "dots" : this is the area where the IR Pen is recognized.

With my question was : how the Wiimote recognize when we're "writing" on the board, or if we just have the pen in the Hand, whatever the position the pen is (in the area or not) !  ;D



Offline benpaddlejones

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Reply #4 on: November 10, 2008, 04:01:54 PM
Asuka
The pen is made with a "momentary switch" so the IR-Led is only illuminated while the switch is pressed. Depending on what cursor control you have selected (left click, right click, cursor motion only) your computer will register that cursor action at the location at which the IR-source is detected. All the Wiimote Whiteboard applications are single cursor, so if multiple IR-sources are detected the cursor will bounce between them.

How to open a folder on your desktop and maximise with cursor control set to "Right Click":
1. Move IR-Pen over icon, touching calibrated surface.
2. Click & release switch on IR-pen
3. Click & release switch on IR-pen
Your computer moves the cursor to that location then registers 2x slingle left clicks on that location close enough together clasiifying it as  a double click, executing the application.
4. Move your IR-Pen to the top right 'Maximise button' on the aplication window & touching the calibrated surface
5. Click & release switch on IR-pen
Your computer will then move the cursor sitting over the icon, to the location of the window maximise button then register a single click, maximising the window.

Does that make sense?

Benpaddlejones :)



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