Rigidbody.GetRelativePointVelocity

描述

相对于点 relativePoint 处的刚体的速度。

计算速度时，GetRelativePointVelocity 会考虑到刚体的 angularVelocity。

using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour
{
    public Rigidbody rb;

    void Start()
    {
        rb = GetComponent<Rigidbody>();
    }

    // Get the velocity of a wheel, specified by its
    // position in local space.
    Vector3 CalcWheelVelocity(Vector3 localWheelPos)
    {
        return rb.GetPointVelocity(transform.TransformPoint(localWheelPos));
    }
}