Author Topic: Wiimote Camera Angles  (Read 17608 times)

Offline eyucel

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on: January 16, 2009, 07:55:48 AM
Hi,

I made some experiments to figure out the wiimote camera angles. They are vertical 30 degrees, horizontal 40 degrees.
The camera sees a 112*82 rectangular area from a 150 cm away and the wiimote is horizontal to the ground.
                            a 172*132  rectangular area from a 240 cm away.

I hope this helps.

Take care
« Last Edit: January 16, 2009, 08:24:30 AM by eyucel »



Offline eyucel

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Reply #1 on: January 16, 2009, 08:23:46 AM
In order to decide  how far you have to put the wiimote from the screen, one needs the following formula.
x=((the screen size-horizontal)/2)/tan(radians(20))
x=((the screen size-vertical)/2)/tan(radians(15))

An example;
The screen size horizontal is 130 cm. The result of tan(radians(20))=0.36397

x= (130/2)/0.36397=178.50 cm.

But, if the screen size vertical is also 130 cm, then x=((the screen size-vertical)/2)/tan(radians(15))

 tan(radians(15))=0.267949

x= (130/2)/0.267949=242.50 cm.

These are approximate distances, but very close to the true numbers.
« Last Edit: February 11, 2009, 05:15:07 AM by eyucel »



Offline Wiweeyum

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Reply #2 on: January 16, 2009, 01:00:45 PM
Oh nice, I applaud your numbers.

Though you've got a few typos in you post. In your examples you multiply the 0.36397 instead of correctly dividing.
« Last Edit: January 16, 2009, 01:07:43 PM by Wiweeyum »


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Offline benpaddlejones

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Reply #3 on: January 16, 2009, 07:28:36 PM
eyucel
Great work!
Supports sts70nl previous work http://www.wiimoteproject.com/wiimote-whiteboard/first-trial-ideal-distance-wiimote-andlt-andgt-size-screen/msg4441/#msg4441 who produced similar figures.

Its good to know that if you want to use a Wide Screen just lay the Wiimote on its side!

benpaddlejones :)


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Offline bubka

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Reply #4 on: February 04, 2009, 07:41:30 PM
mine is ceiling mounted almost parallel with the LCD projection


Offline Ulfilas

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Reply #5 on: October 10, 2010, 04:52:04 PM
What I'm trying to work out - is what is the maximum distance you can put the wiimote before it's out of focus!
I use a fairly large screen with rear projection and have been having some problems (still working out what they are)
The screen - if the full area is used - is about 8ft W x 6ft H

I understand that the basic rule is twice the height should be the distance away - so 12 feet in my case does the wiimote also need to be at a particular height and angle in relation to the screen as per the diagram above in this thread?

As we can't see an image of what the wiimote is "seeing" it does make it difficult to get things spot on!