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Comment: tesselate polygons, then warp in vertex shader ? (Score 1) 55

by flowerp (#45213145) Attached to: Improved Image Quality For HMDs Like Oculus Rift

Hi,

Can't one just subdivide (tesselate) polygons that appear relatively large in screen space so that they consist of many small polygons, with a few pixels each? This would allow for doing the barrel distortion entirely in the vertex shader with no ray tracing being required. The challenge is to perform the dynamic tesselation without requiring a constant updating of the geometry (vertex buffers) on the GPU.
Maybe newer APIs like DirectX10 or 11 would support this dynamic tesselation approach in hardware.

Comment: 1000.2 TFLOPS reached! (Score 1) 96

by flowerp (#42459703) Attached to: Einstein@Home Set To Break Petaflops Barrier

I added two nVidia GTX 260 and one nVidia GT 240 card to Einstein @ Home , and voila this morning's stats show:

Page last updated 3 Jan 2013 8:50:02 UTC
Floating point speed (from recent average credit of all users) 1000.2 TFLOPS

For a BOINC novice it can be quite daunting to figure out how to make it use all GPUs and not accept any CPU-only work units. Editing some XML files in some data directory isn't exactly user friendly.

Comment: Re:too specialized on a single protocol? (Score 0) 357

I did not miss anything here.

If I send a video stream as a sequence of UDP or RTP packets, clumping together to perform some kind of forward error correction is perfectly possible and reasonable.

When you invent some kind of solution to prevent packet loss on wireless links, it should apply to all kinds of IP traffic and not single one protocol.

Comment: This only works end to end (Score 5, Interesting) 357

This is why I think this will not catch on easily. You can't just put a new router with their coding functionality into your home and expect this to work. It also needs support from the server hosting the content you want to acces.

The way they designed their system is end to end. Meaning that the internet server has to run a modified TCP stack and the client system (alternatively your router inbetween) also has to understand this modified TCP dialect.

The chance of millions of Internet servers changing to a (likely) patented, proprietary version of TCP is ZERO.

This is why this idea will fail.

Christian

Comment: The article draws weird conclusions. (Score 4, Insightful) 220

by flowerp (#32259176) Attached to: Black Duck Eggs and Other Secrets of Chinese Hacks

My wife has no problems buying black eggs of any kind in asia stores in Germany. Oh, and black eggs can be mailed long distance, it's fermented and thereby preserved food.

And you really can't conclude from the menu of a chinese restaurant what's going or not going on behind the scenes. I call bullshit on this one. No corporate espionage ring would need to use a "safe house" or "safe restaurant" for that matter to drop off secret information or to secretly meet. It's the information age, dummies!

Space

Space Photos Taken From Shed Stun Astronomers 149

Posted by timothy
from the love-the-gold-mylar dept.
krou writes "Amateur astronomer Peter Shah has stunned astronomers around the world with amazing photos of the universe taken from his garden shed. Shah spent £20,000 on the equipment, hooking up a telescope in his shed to his home computer, and the results are being compared to images taken by the Hubble Space Telescope. 'Most men like to putter about in their garden shed,' said Shah, 'but mine is a bit more high tech than most. I have fitted it with a sliding roof so I can sit in comfort and look at the heavens. I have a very modest set up, but it just goes to show that a window to the universe is there for all of us – even with the smallest budgets. I had to be patient and take the images over a period of several months because the skies in Britain are often clouded over and you need clear conditions.' His images include the Monkey's head nebula, M33 Pinwheel Galaxy, Andromeda Galaxy and the Flaming Star Nebula, and are being put together for a book."

Comment: TFA is full of flaws itself (Score 3, Interesting) 275

by flowerp (#30543800) Attached to: The Science of <em>Avatar</em>

First, Pandora does have an oxygen atmosphere, or how else could you explain the burning torch that Jake Sully lights up in self-defense against the wulf-like creatures at night?

Second, the floating mountains are explained by assuming that the rock is made up of superconducting material ("Unobtainium") and that the flux they keep talking about is actually a strong magnetic field. Superconductors tend to hover in magnetic fields, you know.

Thus spake the master programmer: "When a program is being tested, it is too late to make design changes." -- Geoffrey James, "The Tao of Programming"

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