If we decrease the splines continuity to C2 continuous, it can provide additional freedom degree, and this is very useful for shape constraint in curve design.
把四次有理插值样条函数的连续性降为C2连续就可以提供额外的自由度，这对于控制曲线的形状具有较大的灵活性。
If we decrease the splines continuity to C2 continuous, it can provide additional freedom degree, and this is very useful for shape constraint in curve design.
把四次有理插值样条函数的连续性降为C2连续就可以提供额外的自由度，这对于控制曲线的形状具有较大的灵活性。
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