Dmitra

//Finds an unknown point distance L along a quadratic curve from a known point. 
//Alex Pilafian 2017 - [email protected] - github.com/sikanrong
//If you reuse this code please give me attribution, my dude! I worked hard on this.

//parabola defined by ax^2 + bx + c, a and b are passed in to constructor while c is omitted because it isn't relevant to our calculations.
//u is known point x-value
//L is known length to travel down the curve for our unknown point.
//v is the unknown point x-value, once we have v we can calculate the correspondiing unknown y just by pluging it 
//back into our parabola function

Dmitra

This fork of axis example use changed D3's axis component. The goal of rewrite is to incapsulate all module functionality in one object.