Check out the development here
VIEW THE DEMO HERE *Note, the htmlpreview feature seems a bit finicky, so if something looks wrong just refresh a few times ;)
Sean Kooyman Blog
- Allows toggling on and off of lines
- Allows user to toggle 'draw mode on', allowing them to draw what they think a curve should look like. Once drawn, some basic math is used to maintain the total sum of a line while adjusting it to match the curve the user drew.