Could you help me with a question about motion capture? How can I ensure that the hands of the digital character maintain the same rotation angles as the hands of the stick figure?

[qiyuelei]

We implemented the stick figure’s hand using the 21 keypoint data from MediaPipe. We want to ensure that the digital character’s hand maintains the same rotation angles as the stick figure’s hand, but we don’t know how to calculate the relevant angles. We would like to ask for advice. Thank you!