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Bouncing DVD Logo

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Re: Bouncing DVD Logo

#261

Post by soylentcola »

BallyBrain wrote: post #118
ck2 wrote: post #111

Earlier quoted context omitted.

I finally threw out my $1500 Sony Trinitron 27" high resolution CRT this year. It worked fine, felt like a huge waste of money. But it weighed over 100 pounds!

Too bad that you threw out. Those Trinitrons are still sort after for retro gaming. You could of sold it or given it away.

I had one (it was either cheap or free from someone who wanted to get rid of it years ago) and I loved that it was my first TV with HDMI input at a time when HDTVs were out of my price range.

I had a small apartment so my desk/office area was a corner of the living room and I could run an HDMI cable over to use it as a secondary monitor for watching stuff on the computer. Even the fact that it would display 1080i was a huge jump from my previous bargain bin TV.

It was the days of Windows Media Center and it was before cable companies got rid of Clear QAM channels so I found that I could just take the shared cable in my 3-apartment house and hook up to a cheap Hauppauge card for tuner, guide, and DVR. Add a cheap USB IR receiver/remote and it was like having the "good" cable with the bells and whistles (but with a better interface and for free).

Eventually got an HDTV when prices came down and income went up, but a few years ago when a girl I knew was looking for a CRT to set up a retro gaming station for her young daughter, I donated all 111 lbs. of it gladly. That thing is probably still going.

Re: Bouncing DVD Logo

#262

Post by gattilorenz »

soylentcola wrote: post #259
gattilorenz wrote: post #220

Earlier quoted context omitted.

And if they didn't, and somehow you managed to magnetize it, you needed to use a degaussing coil, moving it away from the screen in a spiralling motion... ah, the memories. https://www.youtube.com/watch?v=3pVLizAHby4

I assume that by "somehow managed to magnetize it" you mean "had crappy detachable boom box speakers sitting on top of it in college, causing the TV to eventually display distorted blobs at the top edge of the image". No? Huh, guess it was just me ;)

I honestly don't know. I picked up a Compaq monitor with a magnetized grille from the trash in 2002 or so, and used for my secondary pc (a venerable P200 MMX that took a LONG time to recompile the 2.4 kernel on a then-unstable Debian Sarge).

No idea how the previous owner managed to magnetize it, it never happened to me.

Re: Bouncing DVD Logo

#264

Post by digitalsushi »

soylentcola wrote: post #259
gattilorenz wrote: post #220

Earlier quoted context omitted.

And if they didn't, and somehow you managed to magnetize it, you needed to use a degaussing coil, moving it away from the screen in a spiralling motion... ah, the memories. https://www.youtube.com/watch?v=3pVLizAHby4

I assume that by "somehow managed to magnetize it" you mean "had crappy detachable boom box speakers sitting on top of it in college, causing the TV to eventually display distorted blobs at the top edge of the image". No? Huh, guess it was just me ;)

I did that, and figured out if you flipped the speaker around, you could "paint" the distortion away.

Re: Bouncing DVD Logo

#265

Post by TylerE »

aasasd wrote: post #176
TylerE wrote: post #175

Earlier quoted context omitted.

AC power is 60hz so room lighting (especially florescent) also flickers at 60hz. It’s a sort of wagon wheel effect.

I dropped a hint right there that the AC frequency is definitely not 60 Hz where I am.

Actually you didn't. There were many countries that used PAL for TV broadcasts but have 60hz AC.

Re: Bouncing DVD Logo

#266

Post by glenneroo »

A_No_Name_Mouse wrote: post #171
mgiampapa wrote: post #121

Earlier quoted context omitted.

Those Sony Trinitron's were literally were made of lead. My back still hurts, but the 20" was worth it!

Was that the one with the demagnitize button? I used to slap the monitor while pushing the button so my coworkers would think I hit it so hard the image bounced around

I finally replaced my aging CRT at work (3rd screen for unimportant stuff) after it finally died after 20 years of service. I still miss pressing the degauss button, which (perhaps relatedly) needed to be pressed after powering on and sometimes multiple times during the day.

Re: Bouncing DVD Logo

#267

Post by jaywalk »

jordanbeiber wrote: post #197
kens wrote: post #60

As a historical note, the bouncing logo wasn't just for fun, but was important to prevent screen burn-in on CRTs. If you had a static image on a CRT for a long time, it could damage the phosphor. Sometimes you could even see the image when the screen was off! This was the original purpose of screensavers, which saved your screen from damage. Displaying a dynamic image prevented one part of the screen from being overu…

True for any flat screen panel as well. The plasmas are really prone to ”ghosting” - just a matter of minutes. And there are ”washing” programs to ”reset” the panel. I guess plasma is the main reason why on-screen channel logos went from solid to translucent?

What channel logos have gone from solid to translucent?

Re: Bouncing DVD Logo

#268

Post by ricardobeat »

SergeAx wrote: post #180
ricardobeat wrote: post #88

Earlier quoted context omitted.

Only tested on an iPhone, works fine at 60fps. You can open the standalone page at https://wwpzj.csb.app/ to avoid the whole codesandbox app running at the same time.

I am grateful for your effort and have no intention to troll or diminish you - in case it looks like that. But still: now in desktop Chrome logo bounces from the very bottom or right edges of window, which is great, but there are gaps at the left and top edges, so logo never reaches those two edges. I beleieve you are quite competent in this, so for me it's just another illustration of how HTML/DOM ecosystem is broke…

There are probably a dozen edge cases (!) that are not covered, though I bet most of them would be the same if using SDL or any other graphics engine. This was mostly a sample of canonical requestAnimationFrame use, in contrast to the original, and not an attempt to re-create the whole thing.

> Thank you and please stop wasting your time on this

Haha. Thanks. I like these mini-challenges, helps me relax for a few minutes :)

Re: Bouncing DVD Logo

#269

Post by magicalhippo »

ricardobeat wrote: post #48
ComputerGuru wrote: post #11

In 1999, my DVD player could do this smoothly without any hitches or glitches. In 2020, my Xeon can't render this fast enough to avoid stutters. Either code quality has gone way down or my DVD player had a faster CPU.

It's just a less-than-ideal implementation, your CPU is most definitely not suffering. Here is a completely smooth version: https://codesandbox.io/s/nostalgic-cherry-wwpzj?file=/src/in... (I made the exact same thing last year as a joke for our team monitors)

Firefox 74 on Windows 10, mostly smooth but stutters noticeably every few seconds.

Re: Bouncing DVD Logo

#270

Post by sitkack »

Kuinox wrote: post #219
leshenka wrote: post #211

Earlier quoted context omitted.

I frequently use apps with "night" theme (black background, white UI controls). You know how Android apps have "back" button on the top-left corner, right? There is also a navbar (back/home/recent buttons). In my case it's a white-ish rectangle that's almost always present on screen. By the time Samsung added an option to hide it, the damage was already done. I have them both burnt in on my screen. I first noticed th…

Make an image of the back button, revert the color, and make your phone display it when you sleep. You will burn the other pixels and won't see the pattern anymore !

Doesn't this level of "burn in" mean that these oled screens will simply burn-out with use rather quickly?
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