CompBezierSurfApplet
This applet shows two bicubic Bezier patches with G1 continuity.
As control vertices along the green curve are moved, control vertices of the left-hand surface patch are adjusted in order to maintain G1 continuity.
PLEASE CHANGE ONLY ONE CONTROL VERTEX AT A TIME!! Adjustments are made to the blue patch based on the first C.V. that was moved on the red patch.