BEIZER Curves
Try moving the Base points and notice how the curves can be manipulated.
C is a LINEAR combination of A1 and A2.
Like wise Locus C1 is a parabolic ( 2nd DEGREE) BEIZER curve.
And finally Locus of point 'O' is a CUBIC ( 3rd Degree) Polynomial.
Move the points to see the effects of the tangents.
All the points are linked to the slider A. Move it and SEE the EFFECT.