然后，可以用微分关系,或受约束的偏微分来表示,曲线的切向量，就是这样了。
Then actually there are ways you can use basically differentials and constrained partials to figure out what the tangent vector to the curve is and so on.
我所做的就是把F投影到切向量方向上，得出F沿着曲线的值,然后再把这些加起来。
What I do at any point is project F to the tangent direction, I figure out how much F is going along my curve and then I sum these things together.
最后给出一些实例来说明松弛参数和切向量对细分曲线的影响。
Finally, we illustrate the effects of using the tension parameter and tangent vectors to generate subdivision curves.
应用推荐