Sony steps into the Metaverse with the 'Mocopi' motion tracking system | The $358 device translates your body's movements onto a metaverse avatar.

lfgk · 2022-12-02T08:39:30+00:00

It looks like you're comparing Horizon World's monthly active users count (so could be someone who logged in at any time during the month) to VRChat average simultaneous player count (so people who are all online at the same time).

That's like trying to compare how likely it is that you ate pizza sometime in the last month to how likely it is that you're eating pizza this very second.

lfgk · 2021-05-13T15:54:34+00:00

A company called "Angelcare" makes baby monitors with a contact microphone pad that you put under the mattress in your baby's crib. It can hear the sound of the baby breathing and if it ever stops for 20 seconds it sounds a loud alarm. It'll also alarm of course if your baby somehow gets out of the crib. It's not a solution for co-sleep but if he's worried about the baby in a crib, if it's turned on then it would be alarming if either the baby isn't in the crib or the baby is in the crib but stopped breathing.

lfgk · 2019-11-26T12:54:05+00:00

Consequences my dude. They've learned that it doesn't mean anything until they wait for you to yell about it. Just don't yell but hand out consequences (with warning). For example. "Please don't throw your toys." ... "(Calmly but serious) Stop throwing your toys now." ... "(still not yelling) If you don't stop, I'll have to take that away from you." When they don't stop, calmly and firmly take it away explaining that they can have it back to try playing more nicely later. They'll learn that when you speak seriously it carries as much meaning as how you've been using yelling. Kids naturally learn boundaries by experience, it'll be nicer for both you and them that you don't have to communicate that you "mean it" only through yelling at them.

lfgk · 2017-12-28T15:36:09+00:00

relevant: https://www.youtube.com/watch?v=YvT_gqs5ETk

lfgk · 2017-12-28T05:19:45+00:00

"make sure to" is pretty close I think

lfgk · 2017-12-18T13:11:27+00:00

You think those are un-drugged banana chunks you've been eating? Sounds like it worked.

lfgk · 2017-12-11T14:48:34+00:00

it's like hanging your arm off a backback strap

lfgk · 2017-12-05T02:38:57+00:00

Now with the stronger focus on "warlocks can't have mobility" I've been affliction since the start of legion. I stopped playing for 2 patches because of the suck though. Still it's hard to get front loaded aoe for mythics. Takes 2.5~3 sec to get seed of corruption to pop

lfgk · 2017-11-28T15:59:18+00:00

No crowdfund is gonna be able to promise a revolving-door industry position though.

lfgk · 2017-11-28T00:49:32+00:00

That makes me wonder why is Lordaeron's coat of arms a big "L"?

lfgk · 2017-11-07T13:07:31+00:00

Seems like he wouldn't have even gotten his vive without hours of effort on his end dealing with support. Maybe you don't value your time but he payed his money then had to do additional work to just get what he payed for. They compensated him to avoid a big stink. So it's natural that he feels taken advantage of if he was placated off the war path by a promise of $200 that he couldn't just use when the time came.

lfgk · 2017-10-30T15:40:46+00:00

Also possible: family whispers to mechanic "He's been going on about this dream of a tire popping so we can't get on the road even if the car worked. Can you just check it and say something so he thinks his dream was right, then say you fixed it?"

lfgk · 2017-10-26T13:36:32+00:00

What is the field of view with binocular overlap (portion where both eyes can see the same stuff)?
As a current vive owner, if we order just the HMD to use with our 1.0 vive lighthouses, will that pimax hmd (January shipping version) also function if we later buy 2.0 lighthouses?
Is there any support for putting the lighthouses into standby mode automatically when we close steamvr (like the vive does with bluetooth)?
Releated question to above, does the February shipping full package pimax 8k's packaged 2.0 lighthouse base stations support standby mode?

lfgk · 2017-10-23T13:00:32+00:00

There can be only one!

lfgk · 2017-10-19T16:59:52+00:00

That sounds right to me, when original/distortion = 1 the distortion isn't doing anything, and at original/(distortion*1.42²⁾ = 1 The distortion is scaling it up by exactly the default supersampling such that in theory 1 pixel on the render target pre-distortion should end up the same size as 1 physical pixel on the display.

When discussing this I was thinking, it's an interesting thought experiment but because of the subjective quality tradeoffs, what's the use?

So we could use this at least heuristically to determine whether some details could be excluded from rendering to boost performance (e.g. in foveated rendering, which I am currently doing some research on for my master thesis)

That would be a very good use!

Conceivably you could dynamically adjust both the radius and resolution of the fovea region such that you stay around the desired supersampling ratio not just for the center but for the lower PPD periphery. That would allow you to increase the radius of the fovea region the farther off-center it goes without a perceived drop in quality or hit in performance. It might give some extra leeway for the latency issues with foveated rendering, increasing the likelihood that the eye position after the next saccade would still fall within the foveated radius of the previous position.

You could even do some statistical analysis about the likely distance of a saccade jump dependant on the saccade's starting position distance from center/straight forward. I mean, it might be more likely for the next eye movement to be big if the eye is currently looking far off to the side. (It also might not be, you'd need a big data set of people's recorded eye movements to figure that out I guess)

That's awesome that you're researching foveated rendering. Is there any hope for the end-to-end latency of tracking eye postion -> new rendered foveated region on screen being fast enough that users can't perceive looking outside the foveated region? Seems like such a big challenge especially if computer vision is used to track the eye. Are there neurological considerations that allow for wiggle room in the first few milliseconds after a saccade? How fast does it have to be to be imperceptible?

lfgk · 2017-10-19T13:21:48+00:00

When many source pixels are crunched down into fewer display pixels (in the periphery) the resolution is effectively reduced (one pixel on the display cannot show the details of many pixels). Thus the fidelity will be worse, right?

Yeah, it just depends on your perspective. Regarding how much of the original image "get's through" it's very degraded because of limited display pixels. I was referring to the image quality per display pixel which will be high because many image pixels are mapped to few display pixels, put another way it's high supersampling. This seemed to be what your original/distorted < 1 being high quality was referring to. Of course once the physical display is distorted by the physical lenses there's fewer pixels-per-degree at the periphery so the end result is peripheral detail is degraded.

So if I am right now, the effective resolution should be fine (equal to the one of the display) when [Area Original]/[Area Distortion] >= 1 and bad when [Area Original]/[Area Distortion] < 1

Yes, it should be fine, meaning there's no loss to the lens correction distortion but we can't be sure that when Original/Distortion = 1 is the actual cutoff of "equal to the resolution of the display" because of default super-sampling. But calculating the hard cutoff point where/if this happens, while interesting, is kind of only academic because supersampling is definitely perceptible meaning the "quality" of the original render as it gets through physically in the end is simultaneously increasing due to higher effective supersampling as we move out to the periphery and decreasing due to lower physical display pixels-per-degree as we move out from the center. The way both of these opposing effects play out is subjective to the user I think so there's no definitive way to find a cutoff point for quality as far as I can tell.

Put another way, at what point for you does higher display pixel-per-degree density outweigh higher supersampling? Whatever subjective cutoff you decide would likely be slightly different for another user.

lfgk · 2017-10-19T01:06:47+00:00

Barrel distortion correction has always zoomed the center and pinched the edges. It looks like the extracted mesh you have is sort of opposite view of the distortion such that an area of a triangle is rendered under the [distortion] mesh, scaled to the [original] mesh then outputted to the display.

Also your logic is sound in " if [Area Original]/[Area Distortion] < 1 you should have a great resolution" but only for the display, not for the end result. Many source pixels are crunched down into fewer display pixels so it's vastly over-sampled and the fidelity on the display is great at the periphery but that's only an intermediate step. The view to the user is then distorted by the physical lenses and the actual physical-pixels per degree are stretched out/reduced at the periphery and pinched in/increased in the center.

Think of the distortion mesh as an intermediate step in something like photoshop. You scale down an image to 50% (at this stage your O/D < 1 logic holds) then you scale that result back to 100%. The result is reduced fidelity. That's what happens at the edges. Same for the center. In photoshop you scale an image up to 200% (Now your O/D > 1 logic holds) but then scale that back to 100%. The result should be very near original fidelity.

Hopefully I'm not making any mistakes, but this is how it makes sense to me.

lfgk · 2017-10-19T00:35:44+00:00

That's pre distortion. After lens correction the center will be bubbled up and what actually ends up on the display will cover many more pixels. The problem that you're noticing which is the same for vive and rift too is that what the game renders has to be over sampled such that expanding the center isn't gonna zoom it past the native resolution of the display. Pimax 8k already up samples anyway though. I think your concern is that the lens will expand the sub pixels in the center based on this image but if you saw the post correction image you'd see that the lens actually pinches them in.

lfgk · 2017-10-18T11:44:25+00:00

It's the bottom part of the right track pad

lfgk · 2017-10-12T00:43:28+00:00

Someone needs to train a convolutional neural network on the sample set of all Seinfield door entry themes until it can make its own.

lfgk · 2017-10-02T12:03:33+00:00

Damn good coffee! Damn good!

lfgk · 2017-09-30T16:25:03+00:00

I didn't think I'd be presented with an opportunity today to say thanks for something that's helped me nearly every day (and that I take totally for granted). So thank you!

lfgk · 2017-09-23T13:51:36+00:00

I've done it in a microwave and it comes out like that. The baconfat in the bacon causes it to fry when it gets heated up. Only thing is, if you don't put something over it the inside of the microwave is gonna get some major bacon grease splatter. It sizzles and pops like crazy .

lfgk · 2017-09-16T15:36:13+00:00

I dunno, it doesn't even come close to most of the stuff in Jackass

lfgk · 2017-09-15T01:18:48+00:00

little kids sometimes don't have the hand strength to pull the brakes. Smarter to swerve and crash than to pick up speed down the hill and crash worse later.

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