maemo.org - Talk - View Single Post - The Epic Android Thread

	daperl	2011-04-12 , 15:15
	Posts: 2,427 \| Thanked: 2,986 times \| Joined on Dec 2007	#2858

Originally Posted by Capt'n Corrupt

The 'head tracking' in the title may imply that there's more to this technique than relative device movement. Even the first shot shows an individuals head being quite smoothly tracked.

If they are using head tracking, I suspect that it's a combination of positional adjustments (eg. gyro), with facial detection via the camera. The resultant animation looks exceptionally smooth, and although I quite sure that modern SoCs have DSPs that can handle these sort of tasks, I am flabbergasted at how smooth it truly is. Perhaps a clever usage of GPU shaders?

You're right, their doing head tracking. But again, the head tracking thread is just setting the variables for the matrix transformation. That's it. There's no extra or special code. And if you'll notice, there's no complex lighting whatsoever; the pixel shader code is basically byte copies. You should not be flabbergasted; this is why GPUs were developed in the first place. Think of the pad movement as a joystick movement for a stationary camera.

head tracking thread: CPU and DSP
most everything else: GPU

A dual-core CPU and that monster GPU makes this a simple task for an iPad 2.

EDIT:

And actually, this would be simple for an n900, or any similarly configured device.

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Last edited by daperl; 2011-04-12 at 15:22.

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