Author Topic: Problem for drawing  (Read 5616 times)

Offline wolih

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on: April 16, 2008, 09:54:42 PM
Hi. I bought a wiimote and a usb bluetooth adapter because I wanted to draw directly to the computer without having to buy one of those wacoms.. I don't know, it seemed like a better idea to me.

Now that I have it (haven't fixed the wiimote to a position, but actually hold it against the wall to try out) I try to draw in paint and my traces ain't fluid, they appear very trembly...

*My ir-pen is powered by ONE AA Battery and a 3.5mm IR LED.

So, I wanted to ask if someone else is using this with the same purpose and if you do--- how is it working for you?

Also, i think someone should make a modification to the wiimote whiteboard so that you can move the mouse with the ir pen, but you click with some button in the keyboard you won't use.

That would rock because you can see were the mouse is...

Thank you :p



Offline Smokeduv

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Reply #1 on: April 17, 2008, 11:52:34 AM
Hi, I've been in the same thing as you, I have been trying a lot of things, and I think it has to be with te tracking resolution of the wiimote, of course, the resolution is not as high as a real interactive whiteboard, but it is good enough to make a good drawing, so, the thing is, you have to use all the tracking potential of the wiimote, so, if you are only using like a 15% of the tracking field, your resolution will be too low so, the area in which you are working is so small and the IR point is big and so, your movements not so fluid. Actually, it looks like if it was aliased or pixelated to make an example, so, with a proyector, the problem is minimum because the area is big, but with a laptop screen or something like that, if your wiimote is too far, you will lose resolution, so, put your wiimote closer.

You can see the % of the tracking area in the wiimote whiteboard software, it's below where the IR points are detected. Give it a try, try increasing that number, it worked for me.

Hope it helps you.



Offline Smokeduv

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Reply #2 on: April 17, 2008, 11:57:39 AM
Oh, another thing, the modification thing you say about using the IR to move the mouse and another thing to use the click and right click is great. There's some software out there about it, they simulate the right click when you have the IR light on for some seconds, I don't remember well but some other have made a better research about it. There is a post about it in this forum, I don't remember where, but take a look and see if it meets your requirements.



Offline wolih

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Reply #3 on: April 24, 2008, 11:11:37 PM
Thanks for your clarification! Glad not to be the only one doing this...

On the other side, not so glad because I don't have a projector lol...
Also, I want to make small drawings, like bond-paper sized.

Could you post some of your drawings?



Offline UndCon

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Reply #4 on: April 25, 2008, 12:25:02 AM
I tried to draw on the display of my laptop but i dont want to risk scratching it so i went for the tablet setup instead



Offline lderooy

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Reply #5 on: April 25, 2008, 10:13:46 PM
I found the same thing with "pixilated" lines.   I did see some improvement when I got a brighter LED and worked with the placement of the Wiimote.

I also found that using the Jarnal software helped since it had a routine in to smooth the lines.  I also read that the Java version of the WiiMote software has a "physics engine" in it to smooth out the lines - apparently it takes the locations of the line locations and tries to normalize them.  I was not able to get the JAVA version working yet so, I don't know how well it works.

You also have to realize that you will not get the same great resolution that you would get from a high-end tablet.



Offline bugmenot

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Reply #6 on: April 28, 2008, 10:58:36 PM
btw, you need a 200hz LED laser diode for a better precision..I found a youtube video where wiimote can detect IR up to 200hz simultaneously http://www.youtube.com/watch?v=WsvK7Euwa-I

but be careful, if its more than 200hz the wiimote would not able to detect your IR pen..


sorry for giving a wrong info, You need to mod your wiimote for that, its connected to a 12C micro controller so that you can have a better tracking quality
« Last Edit: April 28, 2008, 11:07:50 PM by bugmenot »



Offline wolih

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Reply #7 on: May 14, 2008, 07:09:38 PM
Hey UndCon, I would like to know if your drawings come out ok with that setup! Because what you have there is the idea I wanted to do with my equipment... I don't know how to make it stand yet though...

*2 AA Batteries and a special cable give a lot more brightness. Also, try to use copper for the contact, or a commercial switch.