The Colour Clock

naz 15 years ago |

Awesome idea. I took some time to rewrite in HTML5: http://brisy.info/colors/

Though the colours I'm getting are different. I wonder why.

lkozma 15 years ago | |

Here's a version that cycles through the colors continuously (without jumps). Now the numbers do not directly corespond to the color code anymore (they alternate going up-down). Also you can multiply by 256, as the maximum is not reached for any of the values.

I uploaded it here: http://lkozma.net/colorclock/

  d     = t.getTime()/(1000 * 60 * 60 * 24),

  ...

  body.animate({"background-color":
                 "rgb(" + 
		  (((d%2)==1) ? parseInt((h / 24) * 256) : (255-parseInt((h / 24) * 256))) + "," +
                  (((h%2)==1) ? parseInt((m / 60) * 256) : (255-parseInt((m / 60) * 256))) + "," +
                  (((m%2)==1) ? parseInt((s / 60) * 256) : (255-parseInt((s / 60) * 256))) + ")"});
  };

tunaslut 15 years ago | | |

cool....I hacked in some timezones - 4 clocks on the page - local, london, new york, tokyo...if I got my maths right that is:

http://www.coloringout.com/colorclock

someone should make the timezones selectable :)

kemayo 15 years ago | |

I appreciate the pointlessness of being yet-another recreator, but hey, why not: http://davidlynch.org/toys/colorclock/ :D

My quirk is that you can stick a fragment on the end to change the mapping of time to hex. e.g. http://davidlynch.org/toys/colorclock/#smh is seconds=red, minutes=green, hours=blue.

bruceboughton 15 years ago | | |

It'd be great if you could add the necessary meta tags to make this fullscreen when saved to home screen on a iOS device. No need for an icon -- iOS already frames the time nicely.

kemayo 15 years ago | | |

Heh, sure, why not? It now has apple-mobile-web-app-capable=yes.

leot 15 years ago | |

... perhaps because it should be h / 24 instead of h / 60 ?

  body.animate({"background-color":
                 "rgb(" + parseInt((h / 60) * 255) + "," +
                      parseInt((m / 60) * 255) + "," +
                      parseInt((s / 60) * 255) + ")"});

naz 15 years ago | | |

Yes, just corrected this thanks.

bkrausz 15 years ago | |

Haha, I just did the same thing: http://nerdlife.net/colorclock.html

kaichanvong 15 years ago | | |

Guys, get these on github. That way we can fork it & make it awesome as a team faster and better.

naz 15 years ago | | |

Here: https://github.com/briancollins/color-clock

flog 15 years ago | | |

https://github.com/adamburmister/colour-clock

HTML5, CSS3, webfonts, and jQuery

kaichanvong 15 years ago | | |

Similar pull request sent to you too! :)

kemayo 15 years ago | | |

Behind the curve here: https://github.com/kemayo/colorclock

ars 15 years ago | | |

Small bug: Single digit hex codes are showing without the leading zero - it's probably affecting the colors as well.

bkrausz 15 years ago | | |

Fixed, thanks.

naz 15 years ago | | |

Great minds and all. If you replace the html file in the screensaver bundle you can use yours (or mine) instead of the flash one.

ars 15 years ago | | |

Instead of:

  window.setInterval(frame, 1000);

Do:

  window.setTimeout('window.setInterval(frame, 1000)', 999-(new Date()).getMilliseconds());

That way the seconds will be properly synchronized.

vog 15 years ago | | |

Instead of a string containing code, you should use an anonymous function.

Semiapies 15 years ago | |

Your solution, unlike the Flash one, utterly fails to spike my CPU.

That's a new one on me for things labelled "HTML5". :D

light3 15 years ago | |

I'm on a P4 3Ghz at the moment, whereby I can hear my CPU buzzing away when its under load. On the .co.uk site the buzzing is audible, its taking >70% of the CPU, whereas on your site its nice and quiet taking just 6% of the CPU.

ars 15 years ago | | |

I can not figure out how such a simple program can manage to take up 100% of my CPU, and despite that not be in sync with my actual clock (it's a random fraction of a second off).

Has he not heard of sleep(1) ? Saying "it's flash" is no excuse, flash is perfectly capable of sleeping.

ZoFreX 15 years ago | | |

Updating a clock to display the correct time is actually difficult and involved, sleep(1) will not work! The problem reminds me of this Intel article on syncing video output [1]

Basically, sleep(1) won't always align with clock updates, so sometimes a given time will display for more or less time than a second. This can be observed by opening the clock widget on Windows XP for example, it's very noticeable. I don't actually know a nice way to do it, maybe updating 10 times per second or so?

[1] http://software.intel.com/en-us/articles/video-frame-display... - it's down right now, one of the diagrams illustrates the problem well though: http://software.intel.com/file/3984

nitrogen 15 years ago | | |

On POSIX systems, clock_nanosleep() can accept an absolute time argument.

  // In a real program one would probably not use time()
  // Also, some older pre-release versions of the realtime
  // kernel patches had the clock_nanosleep() and time() 
  // clocks out of sync by 0.5s (IIRC)
  for(;;) {
    struct timespec after_epoch = { .tv_sec = time(NULL) + 1, .tv_nsec = 0 };
    // Check for EINTR in a real program
    clock_nanosleep(CLOCK_REALTIME, TIMER_ABSTIME, &after_epoch, NULL);
    printf("Tick\n");
  }

http://pubs.opengroup.org/onlinepubs/009695399/functions/clo...

Unfortunately, this probably doesn't help with Flash or JavaScript clock demos.

xenonite 15 years ago | | |

Rather useful in this case could be an adaptive method. First, you update every 50ms until you circled in the moment when the second toggles. Then you can do sleep(1) again and save resources.

Alternatively, use time() to only sleep the remaining timespan until the next second.

scommab 15 years ago | | |

Well to get technical there isn't a "sleep" function in flash. The best you can do is use setTimeout, which will call a function back in a specified amount of time. Everything including screen drawing, mouse interaction, effects/animations, code execution, etc all run in a single thread, which means if you could actually sleep(1) it would lock everything up for the full second.

axomhacker 15 years ago | |

Honest question - what is the HTML5 part in here (as opposed to I rewrote it in HTML+CSS+JS)?

naz 15 years ago | | |

Even though the implementation above doesn't use any HTML5-specific features, the term is becoming a synonym for Dynamic HTML.

mkramlich 15 years ago | | |

I'd also argue it's becoming a synonym for "Not Flash!?!"

mikepurvis 15 years ago | |

Since we're sharing our HTML5 clocks which peg the processor: http://sandbox.mikepurvis.com/js/clock/

flog 15 years ago | |

This seemed like a fun idea: Here's my remix of it, a bit more HTML5-ish:

http://labs.flog.co.nz/clock/

flog 15 years ago | | |

Added source to github at https://github.com/adamburmister/colour-clock

flog 15 years ago | | |

And by HTML5 I mean HTML5+CSS3

angus77 15 years ago | | |

It's a bit wonky when you use a variable-width font.

flog 15 years ago | | |

Yeah. I moved to ems, thinking that would help, but it's still an issue.

If you don't set a width then you get awkward spacing reflow when the digits change.

pedrokost 15 years ago | |

I did something very similar some time ago: http://pedro.si/experiments/color-clock/ It's CSS3 and some Javascript.

apgwoz 15 years ago | |

maybe they literally encode 9:27:40 as #092740

edit: definitely not, but I think there's a gradient overlay, which is causing the colors to appear brighter in the center.

dshankar 15 years ago |

Simple & beautiful.

Small criticism: Why Flash?

kemayo 15 years ago | |

That "full screen" button in the top-right.

Or, at least, that's the only thing I see there that you can't do with HTML/JS.

personalcompute 15 years ago | | |

You can actually, F11

kemayo 15 years ago | | |

Well, yeah, but you can't have a handy button for it on the page.

bricestacey 15 years ago | | |

Not in Safari. It doesn't have fullscreen.

thristian 15 years ago | |

It should be simple enough to implement in HTML - it looks like it's just doing (seconds since midnight × 16777215 / 86400), converting to hex and using that as a colour. Toggling between "clock" and "colour" mode would be a bit more difficult, but doable.

Anyone feeling up to the challenge?

naz 15 years ago | | |

Here's my attempt: http://brisy.info/colors It treats each section of the time as a hex pair, see colors.js for implementation.

edit: Hours corrected. Thanks wladimir

wladimir 15 years ago | | |

Nice! One small correction: ((h / 60) * 255) should be ((h / 24) * 255) probably

chrischen 15 years ago | |

Probably easier to port it to a screensaver.

kfogel 15 years ago |

Jim Blandy wrote a similar program for X Windows around 1992: a beautiful color clock that would sit on your desktop's root windown and slowly cycle through the colors over the course of an hour. It didn't even show digits -- you just had to learn the colors :-). I think it depended on X supporting writeable color cells, though, so it would need to be rewritten to work on most modern systems (which generally seem to not be set up that way).

  http://svn.red-bean.com/repos/circles/trunk/

Hmm, but that's after I started making some mods. For best results, try an earlier rev (this was converted from CVS, hence the weird log message):

  http://viewvc.red-bean.com/circles/trunk/?pathrev=3

JonnieCache 15 years ago |

The state of the art for custom geek clocks is in hardware AFAIC.

RGB LED color clock: http://www.youtube.com/watch?v=BKT-0qB9l8A&feature=relat...

I also enjoy the classic 'pong clocks' http://www.youtube.com/watch?v=PHxbknBYYAQ&feature=playe...

Clocks are a common beginner project in DIY hardware, they are both simple to make and have good potential for adding stuff like RSS readers and so on when you want to branch out.

http://hackaday.com/?s=clock

jablan 15 years ago |

It would be nice if the colour was meaningful, i.e. if one could, at least roughly, guess the time based on the colour. Say, that the brightness would reflect time of day (brightest at noon, darkest at midnight) and the hue the time within the hour.

Semiapies 15 years ago | |

HSL might work better for that, though I'd cycle it around the spectrum, with the seconds value being the saturation percentage.

mikeknoop 15 years ago |

I feel like this would make an awesome desk or wall clock.

kadavy 15 years ago | |

Maybe load it up on a Chumby? http://chumby.com

cormullion 15 years ago |

It's also on the iPhone app store (for £0.59), but it might be a different author.

Associating time with colour has been tried many times - eg the Chromachron watch was briefly famous:

http://www.ubergizmo.com/2006/11/chromachron-too-advanced-fo...

crassauto 15 years ago |

I had done something similar around 2000 though I wasn't very sophisticated at programming so I think it's off...

http://minus20.e-2.org/artists_projects_chriso.html

Last year I re-made it as a free iOS app which takes the time and converts it using a RGB>HEX function I found that I think is correct:

http://itunes.apple.com/us/app/time-as-color/id335133255?mt=...

I also made one that sets Hour, Minute to latitude,longitude in Google maps which I like looking at: http://itunes.apple.com/us/app/time-as-place/id336539483?mt=...

(edited second link)

jefe78 15 years ago |

This is pretty impressive. Would you consider porting to other OS'? I.e., Linux.

I know I'd be happy to run this on my monitors!

Regardless, great job!

george_morgan 15 years ago |

Very similar to the Chromo http://prote.in/chromo colour clock, which has been around for a few years.

callumjones 15 years ago |

This is cool, but does the screensaver also have to be in Flash? I'd prefer my fans to not spin up when my screensaver kicks in.

regularfry 15 years ago |

A shame that the fastest-moving value is placed in the portion of the spectrum where we have the least colour sensitivity. I'd have put hours in blue, myself. If I'd thought of it.

kemayo 15 years ago | |

http://davidlynch.org/toys/colorclock/#hms http://davidlynch.org/toys/colorclock/#smh http://davidlynch.org/toys/colorclock/#mhs

Or any other order, really.

Someone 15 years ago | | |

Any order, yes, but things like http://davidlynch.org/toys/colorclock/#hsh do not work yet.

kemayo 15 years ago | | |

Yeah, okay, they'll work now.

regularfry 15 years ago | | |

That's rather nice.

pointernil 15 years ago | |

I'm quite sure there are much more mappings from hh:mm:ss -> rgb which would be even more interesting or even practical. For sure the internet will iterate on this idea in just a few seconds :)

regularfry 15 years ago | | |

Yeah, HMS->HSL would be quite intriguing.

ctoneal 15 years ago | | |

Forked from flog: http://www.manatee-combine.com/colour-clock/ http://github.com/ctoneal/colour-clock/

joshes 15 years ago |

I wonder how well the color blind can detect second to second changes in hue? Not a complaint, just a genuine curiosity.

Any color blind out there care to comment?

RossM 15 years ago | |

I'm red-green colour blind but have difficulty in describing colours in general (I see them and know what they are but sometimes (and especially if they're under a coloured light) I can't specifically say what colour a wall is, for example).

This is quite interesting as I can't really see second-by-second changes; at most I can see small jumps (not the radically large ones) you get every few seconds.

SoftwareMaven 15 years ago | | |

I'm not color blind, yet that is what I see, too. Makes me wonder about the brain's color-processing. My guess is small variations are ignored by the brain because slightly changing light conditions can cause all colors to vary slightly over time. Your brain filters them out so you can only tell when something really is changing.

kevinburke 15 years ago |

I still like the Polar Clock best... http://blog.pixelbreaker.com/polarclock

pharrington 15 years ago | |

My favorite clock remains the Uniqlock: http://www.uniqlo.jp/uniqlock/

OstiaAntica 15 years ago | | |

That's hilarious!

rottencupcakes 15 years ago |

The switch from 22:59 to 23:00 was stunning.

I can't wait for the switch at midnight (#FFFFFF -> #000000).

madcaptenor 15 years ago | |

I missed it. It basically goes from white (well, very pale cyan) to bright red, right?

oldstrangers 15 years ago | | |

#FFFFFF to #000000 would be white to black.

madcaptenor 15 years ago | | |

I made my comment at about 23:05 last night, my local time; I was talking about 22:59:59 to 23:00:00, or (approximately) #F5FFFF to #FF0000.

tomerico 15 years ago | | |

Feel free to modify your computer clock :)

madcaptenor 15 years ago | | |

Seems like cheating.

madcaptenor 15 years ago |

It would be interesting to see what would happen if the colors were given by following a space-filling curve in three dimensions, like the last figure at http://mathworld.wolfram.com/HilbertCurve.html

th 15 years ago |

The hex clock seems to jump every once in a while, probably compensating for the large difference in the number of hexadecimal color values and seconds in a 24 hour day.

How are the color values related to the seconds here?

wladimir 15 years ago | |

As I understand: hours are red, minutes are green, seconds are blue. Simply formulated as HTML color #HHMMSS (and with each component scaled appropriately to 00..FF so that 00:00:00 is #000000, 23:59:59 is #FFFFFF)

wladimir 15 years ago |

I'd like one that doesn't show the seconds (but does change the color every second). This is too distracting for me to really use.

Funny and original idea though!

grigy 15 years ago |

Nice job, but why screensaver only for MacOS?

chrischen 15 years ago |

I've turned off sleep mode so I can actually see this as my screensaver now.

edge17 15 years ago |

that's quite beautiful

JoeAltmaier 15 years ago |

iPhone app?

tr 15 years ago | |

done