/**
  * Checks if something is on the line. If it appears to be,
  * then it subdivides the curve into halves and tries again
  * recursively until the flatness of the curve is less than
  * the fudge.
  * Frankly, I am a f*cking genius. I am one of two people in
  * this department that could have possibly thought of this.
  */

Source: Direct link to the source code
Software: JFLAP
Programming language: Java