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

sketchub.com

41–50 of 76 posts

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

#41
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"?

Actually, just reloading the page reveals the counters nasty secrets :)

It currently starts approximately at 14,230,617,000

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

#43

I work in a distributed office, and over the past few days I've been trying to find a "concept mapper", which helps us to make projects more concrete through flowcharts etc. The problem that I keep on facing is that the web apps which dominate the current market just don't cut my needs. They don't allow for proper exploration, and collaboration is a frustrating progress. We would gladly pay for a tool that doesn't ge…

have you looked at Creately? I've been using it for a month or so and it seems pretty good: http://creately.com/

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

#44

I'm not sure if it's just me, but there seem to have been a few very similar sites/ideas posted here over the last few days. Well done for making it work in IE though =)

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.

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

#45
post #38
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.

:D

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

#46
post #44

I'm not sure if it's just me, but there seem to have been a few very similar sites/ideas posted here over the last few days. Well done for making it work in IE though =)

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

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

#50
Very nice - you should do what I figured out for a project - momentum when there is a big action, and fine control for small actions - if I scroll the wheel dramatically, give me some momentum on that zoom - if I scroll it slowly, no momentum and fine increments (like you have now)

The way I did this in javascript was to create an array of zoom in/out and the four directions - then you add or subtract from the array based on intensity of gestures over time - even keyboard action keys (+/-) can have momentum this way by adding when there is continuous keypresses - I was pleased how it turned out in the end.

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