tomjkidd / web-whiteboard

A clojure/clojurescript whiteboard for interactive drawing in the browser

web-whiteboard

A clojure/clojurescript whiteboard for interactive drawing in the browser

Overview

This project is meant to create a clojure system that can allow multiple clients to collaboratively draw together.

It is not meant to be a drawing tool like Photoshop, but simply a drawing surface that allows you access to color and size with little else.

The next pieces will be:

1. Create a web server that can stream svg events via websockets -> DONE

2. Use tangoclj on the server to handle coordinating with multiple clients.

3. Grow out the idea some more to allow saving, replay, etc.

4. Improve the line drawing mode. Jack Schaedler wrote a great article that demonstrates a few neat algorithms that are simple and would improve the perceived smoothness of strokes. -> DONE as :smooth-line mode

5. Create more drawing modes.

Setup

Build the ClojureScript

lein cljsbuild once

Run the web server (which serves resources/public)

lein run

Then just go to the link

http://localhost:5000/index.html?wid=a&cid=a

Open another tab and go to the link

http://localhost:5000/index.html?wid=a&cid=b

This will connect two different clients (cid) to the same whiteboard (wid). Drawing done in one should stream to the other.

License

Copyright © 2016 Tom Kidd

Distributed under the Eclipse Public License either version 1.0 or (at your option) any later version.

web-whiteboard's Issues

changes not persistent

Consider this situation:

We've two windows open : Win A, Win B and they share the same whiteboard.

Now if we reload B, the whiteboards are out of sync, i.e, contents displayed on A and B are different though the streaming still works but with different whiteboard states.