title: What exactly are knots (b-spline)
body: <p>Knots are the things that make the curve continuous, like in Bezier curves, the line segment from the mid point control point have to have the same tangent and length and if they are then the Bezier curves are c-continuous.</p>
  
  <p>So, knots as I have read are parameters of the spline that handle the start and end points hence the c-continuosity of the curve.</p>
  
  <p>So, what would a knot data type look like ?</p>
  
  <p>Any idea's?  </p>