2013

Table Of Contents
Understand Surface Continuity and Bulge Magnitude
Surface continuity and bulge magnitude are properties that are frequently
used when creating surfaces. When you create a new surface, you can specify
the continuity and bulge magnitude with special grips.
Continuity is a measure of how smoothly two curves or surfaces flow into
each other. The type of continuity can be important if you need to export
your surfaces to other applications.
Continuity types include the following:
G0 (Position).Measures location only. If the edge of each surface is
collinear, the surfaces are positionally continuous (G0) at the edge curves.
Note that two surfaces can meet at any angle and still have positional
continuity.
G1 (Tangency). Includes both positional and tangential continuity (G0
+ G1). With tangentially continuous surfaces, the end tangents match at
the common edges. The two surfaces appear to be traveling in the same
direction at the join, but they may have very different apparent speeds
(or rates of change in direction, also called curvature).
372 | Chapter 8 Work with 3D Models