So do you point at the screen, or the sensor bar? (Wii)

Discussion in 'Games' started by mac000, Oct 18, 2006.

  1. mac000 macrumors 6502a

    Joined:
    Sep 6, 2005
    #1
    So i just never have found out even though this question is always asked. But for games like Redsteel, zelda, "any game" , do you have to point at the sensor bar or the TV?

    that would just be awfully awkward/rediculous to have to point at the sensor bar no? i'm thinking, if you give yourself some space bw the tv/sensor bar and yourself you will be point at the in "theory" or what?
     
  2. p0intblank macrumors 68030

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    New Jersey
    #2
    I honestly don't know much about the Wii yet, but I believe the Wiimote uses RF to send signals, meaning it doesn't matter where you point it. I could be wrong, though.
     
  3. srobert macrumors 68020

    srobert

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    Jan 7, 2002
    #3
    Short version: You point at the TV.

    Longer version: The sensor bar is only used for games that make use of the "pointing" feature. As far as I know, the Wii remote simply has to have the sensor bar in its field of view. I don't know what the angles are but it should be wide enough. If you aim the Wiimote at the TV, the sensor bar should be in it's field of view. You will be able to accurately aim at points on the screen.
     
  4. ChrisBrightwell macrumors 68020

    ChrisBrightwell

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    #4
    You point at the sensor bar.

    HOWEVER -- The sensor bar sits atop your TV (centered, ideally), so you're pointing at one in the same.
     
  5. stevehp macrumors 6502

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    It's not a house, it's a home.
    #5

    What's going on?!?!?! You didn't have to do that for Duck Hunt!!! :)
     
  6. afornander macrumors 6502

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    Apr 5, 2006
    #6
    when you set your wii up, you probly have to diagnose it, like you would a touch screen, by sliding the wiimote across the screen;)
     
  7. Malus macrumors 6502

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  8. HiRez macrumors 603

    HiRez

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    #8
    More accurately, you point at neither the tv nor the sensor bar, but at anything you want. It senses direction and tilt no matter how you hold it. Now yes, you do need to generally be in front of the bar/tv, and within a certain range for the signal to be powerful enough, but as far as I know, that's it.
     
  9. apfhex macrumors 68030

    apfhex

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    #9
    You diagnose a disease. You calibrate a controller. :)

    In games that use the function, you point the controller at the screen. The sensor bar should be within visual range (ideally above or below the screen near the center), that's it, it figures the rest out itself. It wouldn't make sense any other way.
     
  10. LemonsofDeath macrumors newbie

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    Oct 18, 2006
    Location:
    Brooklyn
    #10
    I believe the sensor bar uses parralax to determine where the controllor is. Similar to how you eyes determine depth perception or your ears determine what direction sound is coming from. So you would have to callibrate it so it knows where the TV is. Its this combined with the motion sensors in thee controllers that make it able to tell.... just about everything you do with the controller.
     
  11. plinkoman macrumors 65816

    plinkoman

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    New York
    #11
    you point at the tv.

    the wiimote has several sensors in it (3 I think), as does the sensor bar. this is how it determines excately where the wiimote is pointing in relation to the sensor bar.

    then; you calibrate the wiimote; that is, a point on the screen is highlighted, and you are asked to point at it and push a button. now; when your pointing, it's still in relation to the sensor bar, but, the wii knows where that is on screen; thus, you are pointing directly at the screen, and the wii knows exactly where that is on the screen.

    the short version: it will work just like a touch screen. you point in several places, it's calibrated, and thats the end of it.
     
  12. Moria macrumors regular

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    May 7, 2005
    Location:
    Glasgow, Scotland
    #12
    If you want to put it simply you 'point' at the sensor bar, but you don't really 'point' at anything. The sensor bar picks up which direction the Wiimote is facing, the angle its at, the speed its moving at and any movement in it. The TV has absolutely nothing to do with it and whatever size you have it wont effect your game anymore that it would on a normal console.

    You don't and can't actually point at anything. In games you're dragging the reticule like you would with a mouse on a PC. Again, like a mouse, they aren't mapped out exactly 1:1, meaning if you move it 1cm upwards you're reticule wont move up 1cm. This is how you can either do small movements in WiiSports or big movements and it gives you the same output on the TV.
     
  13. srobert macrumors 68020

    srobert

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    Jan 7, 2002
    #13
    The sensor bar is little more than…

    [​IMG]

    …but shining in a different wavelength (infrared instead of visible light).

    The Wii remote is like a digital camera with accelerometers and tilt sensors strapped on.

    To the Wii remote, the sensor bar looks something like this:

    ••••________••••

    By measuring the position of the "lights" it's able to tell where it points.

    Edit: Wikipedia give a good explanation of how it works:

     
  14. SpookTheHamster macrumors 65816

    SpookTheHamster

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    #14
    Nobody else had one of these with their SNES? You pointed at the TV then, you still will now!
     
  15. Sdashiki macrumors 68040

    Sdashiki

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    #15
    a light gun is NOT the Wii-mote.

    not even close.
     
  16. gloss macrumors 601

    gloss

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    around/about
    #16
    Light Guns used for CRT screens don't work with LCDs, plasmas, etc because of the mechanism involved. They had to develop a new system for use with HDTVs.
     
  17. 2nyRiggz macrumors 603

    2nyRiggz

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    Thank you Jah...I'm so Blessed
    #17
    I think you will be pointing at the TV. The sensor bar will be to the bottom of your tv or the top. The sensor bar will sense where you point.




    Bless
     
  18. Sdashiki macrumors 68040

    Sdashiki

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    #18
    Its very logical how it works:

    sensor (is it one or two, as 2 would make more sense) goes on top of TV

    When you turn on the Wii, it will ask you to calibrate somehow.

    Most likely sitting in your "playing" position, pointing at where you believe the center is (prolly a giant X on screen) and click.

    BAM from the sensors it now knows your position in 3D space in relation to the TV set.

    Using 2 sensors would be the only way to know distance correctly and accurately, IMO, but Im no engineer.
     
  19. srobert macrumors 68020

    srobert

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    Jan 7, 2002
    #19
    Couldn't the Wiimote sensor measure the apparent distance between 2 of the sensor bars' infrared beacons to extrapolate distance from TV? The 1 megapixel sensor should be precise enough to give a very good estimate as far as gaming is concerned. Just thinking.
     
  20. Krevnik macrumors 68030

    Krevnik

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    Sep 8, 2003
    #20
    Your quote and explination earlier accounts for that. It isn't that you need two sensors, but rather, two /good/ points of reference. The one bar provides that. By having the two sets of LEDs spaced apart a known distance, you get what you need.

    This is actually based partially on quite a few techniques, it appears, from trilateration, triangulation, possibly parallax, and so on.

    Orientation of an object in 3D space is easy, a first-year college student could whip up a device like the remote to do that. Position? Now that is hard, and we tried tackling that problem in our senior project. I must say, for Nintendo's purposes, they came up with a pretty decent solution for the price.
     
  21. jdechko macrumors 68040

    Joined:
    Jul 1, 2004
    #21
    Yeah, it probably needs at least 2 of the 6-8 (not sure how many) IR LED's in its field of view to accurately gauge where it is being pointed. The Wii will be able to calculate from those 2 points angle, and distance. It knows that the sensor bar's LED's are a fixed distance from each other. By measuring the distance in the image captured by the Wiimote's sensor it can determine the distance to the Wiimote. The Wiimote will also capture the orientation of the LED's. If the LED's are lined up along the X-Axis, it will confirm with the accelerometers/gyro that the Wii-mote is horizontal, Y-Axis alignment of the LED's being vertical orientation, and any degree of tilt in between.

    In any case, the TV and the Sensor will most likely be juxtaposed with one another in a "close-enough" location that you'll just point the controller in the general direction of them both.
     

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