IHollogram for iPhone - illusion of a 3d hologram jumping off the screen (vid)

http://www.davidoreilly.com/blog/2008/08/ihologram/

by nickb • 18 years ago

30 5 18 years ago

tlrobinson• 18 years ago

"The software uses the ipod’s built-in gyroscope to calculate rotation on the y-axis, so we can look around the environment around by turning the device, there are also controls for manual rotation with a slider on the left hand side of the screen."

Cool, but the iPhone doesn't have a gyroscope, only an accelerometer. How does it detect rotations that are perpendicular to gravity?

nickb• 18 years ago

I believe the table is on a small incline (i.e. it's not perfectly horizontal). If you think about it, it's pretty hard to find a table that's perfectly leveled anyway. I have no idea how sensitive the accelerometer truly is so it could be a hoax (but probably it is not).

dandelany• 18 years ago

Yeah, I call hoax... Physics-wise this doesn't make sense

http://tinyurl.com/yqh6zq

TUAW confirms that, if you set the iPhone on a tabletop, the iPhone returns 3 values:

- X: rotation around the short axis

- Y: rotation around the long axis

- Z: whether phone is face up or face down

I don't think this is possible... unless that table was actually at a 45 degree angle or something?

OrangeCoconut• 18 years ago

If the table is on enough of a slope for the iPhone to detect rotation (yaw) it would work... But maybe I'm just hoping it does because the idea of headtracking for 3d is so fun (check out http://www.cs.cmu.edu/~johnny/projects/wii/ for a similar experiment with the Wii if anyone missed it)

nazgulnarsil• 18 years ago

seems like the image would lag behind the rotation of the iphone a bit.

IHollogram for iPhone - illusion of a 3d hologram jumping off the screen (vid)

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