What exactly does the 3D Depth Slider do?

Discussion in '3DS - Console, Accessories and Hardware' started by spiritofcat, Jan 10, 2011.

Jan 10, 2011
  1. spiritofcat
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    Member spiritofcat GBAtemp Advanced Fan

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    I've seen a lot of conjecture on here about the 3D Depth Slider, and what effects turning the 3D off might have, but I still haven't seen anyone clearly explain what the slider actually does.

    To generate a 3D image, each eye must be fed a slightly different picture.
    I understand that with the 3D turned on, two images are rendered and a parallax barrier inside the screen blocks the view of one of them for each eye.

    What I don't quite understand though is that the 3D Depth Slider is said to be able to adjust the depth of the 3D effect.
    How does it do that? Does it send a signal into the software and cause it to render the second image from a view point farther apart from the first? Or is it just some kind of hardware manipulation within the screen?

    Also, with the 3D turned off (Slider all the way down), does the device then just render both images from the same view point, or block the second image entirely?
     
  2. TehSkull

    Member TehSkull Living the life

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    I think it's a software-oriented slider. The higher/lower it is, sends a signal to the game telling it how much 3D to render.

    Or, plausibly it could be a physical slider with only a tiny digital switch to tell the game whether 3D is on or off, the adjustments being made to the liquid crystal's angle instead of the software.

    Really couldn't tell you which. Maybe someone knows, but I sure don't.
     
  3. dsfanatic5

    Member dsfanatic5 Team ICO Freak

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    I think you're looking to deep into the technology. All we need to know is that the 3D effect can be lowered until off. As for how it works, I don't know how anything works. I mean, I understand technology to a high degree, but when you really think about it, it's all magic. Cavemen discovered the wheel, and now we have 3D technology, which makes sense when you consider all of mankind's achievments up until this point.

    I do often wonder, if a natural disaster wiped out all of our technology and resources, how long would it take us to retain where we left off? Our technology helps to create new technology, but what if we had to start from scratch, like in a forest with twigs, moss, and no computers.

    Perhaps I would ask questions beyond, about the depth slider, but I'd rather enjoy the fact that it works, and no ponder "How it works." Curiosity didn't kill the cat, Grandma did (food required), and they all went to heaven in a little row boat.
     
  4. GentleFist

    GentleFist Newbie

    the only way that comes in my mind is that you could change the distance of the cameras to change the 3d effects

    its software for sure~
     
  5. Rydian

    Member Rydian Resident Furvertâ„¢

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    It's gotta' be software. The depth would be adjusted by both the camera locations and angle (to retain the same focal point).
     
  6. smf

    Member smf GBAtemp Advanced Fan

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    It probably changes the distance between the two cameras, which also probably changes the angle they are facing.
    However I can't see it matters if the focal point does change.
     
  7. cwstjdenobs

    Member cwstjdenobs Sodomy non sapiens

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    Because it's still a 2D projection of 3D space. Just done twice. So you need a real focal point on the screen.
     
  8. Kiriashi

    Member Kiriashi GBAtemp Regular

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    Considering the trajectory of the screens, I'm betting it just cancels the second image; both images at the same location would make the game look really weird.
     
  9. TehSkull

    Member TehSkull Living the life

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    You're understanding it wrong. If turning off the 3D blocked out the 2nd image, that would basically be saying that turning off 3D halved the 3DS's resolution. "Both images" wouldn't be at the same location either, there just simply wouldn't be a 2nd image being rendered. There would be one, double-sized image.
     

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