I was looking at the camera path in Manta, and I see that it uses a spline... In the spline, I see a function called addKnot(). Can someone tell me what this function does?  It appears that it might add a key frame to the motion path... However, the name is very confusing.  (Unless I'm the one confused...) Knots are not points in space on a spline, they are specifications of how the basis functions are set up...  I'd appreciate any insight anyone can provide on this.

     Thanks,

               Dav