Smooth Joining Between Adjacent B-Spline Surfaces

G⁰ and G¹ continuity between adjacent B-spline surfaces is implemented not by deducing the continuity conditions which the control vertices of these surfaces should meet, but by assigning check points along their common boundary curve and modifying the adjacent surface to meet the requirements of sharing common tangent plane. This method is not restricted by the degree and topology of joining surfaces and is a general approach.