Question

I have a character made of up child objects that are animated using Unity3D's animation system.

While the player is walking, I can programmatically move the hand object up to catch a ball using the following code.

hand.position.y = ball.transform.position.y;

I need the hand object to go back to following the walk animation after it touches the ball, but instead it just stays at the exact position since it was set.

Answer 1

您想使用inverse kinematics并让Unity为您确定定位的工作。这是一个快速而肮脏的（未经测试的）捕捉球的例子（它在C＃中，但对于UnityScript应该非常相似）：

// in a script on the same GameObject as your animation controller
bool isCatching;
Transform ball;

void OnAnimatorIK (int layer) {
    if (isCatching) {
        // set position and rotation weights for your catching hand
        animator.SetIKPosition(AvatarIKGoal.RightHand, ball.position);
        animator.SetIKRotation(AvatarIKGoal.RightHand, ball.rotation);
    } else {
        // return your position and rotation weights back to their defaults (probably 0f?)
    }
}

您需要做一些工作（可能是光线投射或只检查距离和方向）以确定何时将isCatching标志设置为true，并且您将要使用{{3的权重}和position让它看起来很自然。 rotation有更详细的信息。

How to give control back to animation in Unity3D once altering objects location

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