How to realize Bezier Curve Motion by zrender

the only thing I can animate is percent, but this is not what I want. I want an origin to move along the Bezier curve, how to achieve it?

Mar.21,2021

currently uses a curve as the base line, plus a second curve to simulate the dot, and a third curve to cover the second curve.
barely fulfilled the requirement. The downside is that dots can only be distinguished by color, not larger.


how to turn a line into a dot, solve

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