<P> One example of where surfacing excels is automotive body panels . Just blending two curved areas of the panel with different radii of curvature together, maintaining tangential continuity (meaning that the blended surface doesn't change direction suddenly, but smoothly) won't be enough . They need to have a continuous rate of curvature change between the two sections, or else their reflections will appear disconnected . </P> <P> The continuity is defined using the terms </P> <Ul> <Li> G0--position (touching) </Li> <Li> G1--tangent (angle) </Li> <Li> G2--curvature (radius) </Li> <Li> G3--acceleration (rate of change of curvature) </Li> </Ul> <Li> G0--position (touching) </Li>

What is the meaning of g0 g1 and g2 in surface modeling
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