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Hermite插值

ref point poi tps jqm html gamedev change hang

位置

(2t³ - 3t² + 1) * p0 + (t³ - 2t² + t) * m0 + (-2t³ + 3t²) * p1 + (t³ - t²) * m1

切線

p‘(t) = (6t² - 6t)p0 + (3t² - 4t + 1)m0 + (-6t² + 6t)p1 + (3t² - 2t)m1

https://gamedev.stackexchange.com/questions/77944/how-can-i-find-the-tangent-and-normal-at-an-interpolated-point-on-a-catmull-rom

http://www.cnblogs.com/jqm304775992/p/5044728.html

Hermite插值