rroohhh / draw

not infinite, but huge canvas collaborative vector drawing program

draw

nearly infinite canvas vector drawing program, mainly for keeping a digital notebook

technology

every point drawn is represented by a 128bit integer, this gives a dynamic range of over 3*10^38. using integer means that accuracy is not reduced when moving away from the origin (you might recognise this behaviour from other "infinite" canvas drawing programs)

points belonging to a stroke are connected with triangle strips and the stroke shape is rendered in a pixel shader

goals

• high performance: using this for normal notetaking no slowdowns should be noticed
• collaborative: many people should be able to draw together transparently over network, like etherpad, but for drawing
• multiplatform: native linux, windows, mac, android and webbrowser support
• infinite undo / save: don't worry about saving
• full featured: all the normal drawing tools are available: curves, straight lines, polygons, layers, markers, rotation, translation
• good tablet support: support drawing tablets with pressure, tilt and rotation
• flexible output: high quality svg and png rendering

draw's Issues

how should alpha work for self intersecting lines

There are two main possibilities

1. alpha of self intersecting lines is a no op, if a line self intersects the intersection has the same alpha at the whole line
2. it works like "real" pen / pencil and the intersection accumulates alpha

The first option is vastly more easy to implement and even if one implements the second option it is probably never as fast as the first option.
However the second option is a lot nicer for real drawing stuff, probably not so important for note taking.

I guess having the choice between the two would be nice, however the first option will probably be implemented a lot earlier then the second option.

The first option is also how most other infinite canvas drawing programs handle this (atleast Milton and Mischief)

find good name

should be good to google and allow for a good domain name