Rigidbody.GetPointVelocity

Description

点 /worldPoint/（全局空间）处刚体的速度。

计算速度时，GetPointVelocity 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>();
    }
    Vector3 CalcWheelVelocity(Vector3 localWheelPos) {
        return rb.GetPointVelocity(transform.TransformPoint(localWheelPos));
    }
}