* @param t1 - global parametric value of the first curve's starting point
* @param t2 - global parametric value of the second curve's starting point
* @param w1 - global parametric length of curve 1
- * @param c1 - global parametric length of curve 2
+ * @param w2 - global parametric length of curve 2
*
* The final four parameters are for keeping track of the parametric
* value of the curve. For a full curve t = 0, w = 1, w is halved with