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Show HN: a free multi-user whiteboard with unlimited, zoomable surface

sketchub.com

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Re: Show HN: a free multi-user whiteboard with unlimited, zoomable surface

#61

Post by jisaacstone »

jisaacstone wrote: post #60
jamesgeck0 wrote: post #57

Earlier quoted context omitted.

Similar issue on Desktop Opera 11.50.

I'm on Opera 11.5 / OSX 10.6.7 - can view but not draw.

Also: firefox freezes when I try to open a 2nd tab with a different whiteboard.

Re: Show HN: a free multi-user whiteboard with unlimited, zoomable surface

#62

Post by dctanner »

superted wrote: post #34
senko wrote: post #32

Cool stuff! I've looked a bit at what it uses: shapes drawn are vectors, the app uses Raphael ( http://raphaeljs.com/ ) for drawing, and Pusher ( http://pusher.com/ ) for whiteboard syncing.

Regarding the Pusher web site, am I the only one who cannot resist the temptation of loading up Firebug to verify whether the counter is for real or "interpolated"?

Unfortunately it's not really viable to sent a counter msg for every msg which goes through the system ;) Our stats and logging has to be somewhat delayed.

Re: Show HN: a free multi-user whiteboard with unlimited, zoomable surface

#63

Post by altrego99 »

swombat wrote: post #58
jeremydavid wrote: post #56

Earlier quoted context omitted.

Thanks for that link. It looks promising, but the canvas is just too small.

Click on "New Advanced Mode" on the right hand side. Big version, multi-page, etc...

For some reason to me this looks like an Yahoo product, whereas the one linked in the OP looks like Google.

Re: Show HN: a free multi-user whiteboard with unlimited, zoomable surface

#64

Post by BoppreH »

user24 wrote: post #38
A1kmm wrote: post #33

The front ends seem to get desynchronised when two incompatible concurrent edits happen; this is a difficult issue to resolve, but one solution would be to change the data flow so local edits are drawn by the client on a transparent canvas, get sent to the server, and then get drawn on the underlying main canvas only when they are sent back from the server. The transparent canvas can be reset by the client at that po…

This is what we do for http://300lin.es ;) edit: My God, it's full of cocks.

Quit hint: it's too easy to make a DOS by quickly drawing hundreds of lines in the same spot. It doesn't take more than two minutes and regular writing or drawing is too slow and ends up erased before finished.

Maybe limit the number of lines an user can draw during a certain time?

Re: Show HN: a free multi-user whiteboard with unlimited, zoomable surface

#65

Post by user24 »

BoppreH wrote: post #64
user24 wrote: post #38

Earlier quoted context omitted.

This is what we do for http://300lin.es ;) edit: My God, it's full of cocks.

Quit hint: it's too easy to make a DOS by quickly drawing hundreds of lines in the same spot. It doesn't take more than two minutes and regular writing or drawing is too slow and ends up erased before finished. Maybe limit the number of lines an user can draw during a certain time?

Thanks :) Yeah, we limit the length of line to try to avoid scribblers. We thought of rate-limiting the number of lines too, and adjusting the limit, so the first time you hit the limit you're stopped for 1 seconds, next time for 2 seconds, then 4, 8, 16 and so on.

Would probably work quite well.

PS is your hostname 'bd222edited for privacy.com.br' ?

Re: Show HN: a free multi-user whiteboard with unlimited, zoomable surface

#66

Post by davidedicillo »

florianguenther wrote: post #46
MortenK wrote: post #44

Earlier quoted context omitted.

Not working in IE 8 for me at least :) Works fine in Firefox. Great app, would be very interesting to try it on one of them digital whiteboards.

On a multitouch table it works great: http://www.youtube.com/watch?v=LpDp2Izx4W8

Florian, what's the device you are using?

Re: Show HN: a free multi-user whiteboard with unlimited, zoomable surface

#67

Post by kami8845 »

user24 wrote: post #38
A1kmm wrote: post #33

The front ends seem to get desynchronised when two incompatible concurrent edits happen; this is a difficult issue to resolve, but one solution would be to change the data flow so local edits are drawn by the client on a transparent canvas, get sent to the server, and then get drawn on the underlying main canvas only when they are sent back from the server. The transparent canvas can be reset by the client at that po…

This is what we do for http://300lin.es ;) edit: My God, it's full of cocks.

This is more hilarous than expected

http://i.imgur.com/t9OuG.jpg http://i.imgur.com/PDqe5.jpg

Re: Show HN: a free multi-user whiteboard with unlimited, zoomable surface

#68

Post by swombat »

altrego99 wrote: post #63
swombat wrote: post #58

Earlier quoted context omitted.

Click on "New Advanced Mode" on the right hand side. Big version, multi-page, etc...

For some reason to me this looks like an Yahoo product, whereas the one linked in the OP looks like Google.

Huh. I'm not sure that's a compliment...

Re: Show HN: a free multi-user whiteboard with unlimited, zoomable surface

#69

Post by user24 »

kami8845 wrote: post #67
user24 wrote: post #38

Earlier quoted context omitted.

This is what we do for http://300lin.es ;) edit: My God, it's full of cocks.

This is more hilarous than expected http://i.imgur.com/t9OuG.jpg http://i.imgur.com/PDqe5.jpg

yeah it's hilarious what people's doodles actually end up turning in to. Everything's logged on the server, I'm planning to do a stop-motion style playback video to put up on youtube eventually.
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