Rigidbody2D.AddForce

参数

描述

对刚体施加力。

力被指定为在 X 和 Y 方向（在 2D 物理中，没有 Z 方向）上的两个独立分量。对象在力的作用下的加速运动遵循力 = 质量 x 加速度 法则 - 即质量越大，加速到给定速度所需的力也越大。

另请参阅：AddForceAtPosition、AddTorque、mass、velocity、AddForce、ForceMode2D。

// The sprite will fall under its weight.  After a short time the
// sprite will start its upwards travel.  This is because
// of the force on the sprite.

using UnityEngine;
using System.Collections;

public class Example : MonoBehaviour
{
    public Texture2D tex;

    private Rigidbody2D rb2D;
    private Sprite mySprite;
    private SpriteRenderer sr;
    private float thrust = 10.0f;

    void Awake()
    {
        sr = gameObject.AddComponent<SpriteRenderer>();
        rb2D = gameObject.AddComponent<Rigidbody2D>();
    }

    void Start()
    {
        mySprite = Sprite.Create(tex, new Rect(0.0f, 0.0f, 128.0f, 128.0f), new Vector2(0.5f, 0.5f), 100.0f);

        sr.color = new Color(0.9f, 0.9f, 0.5f, 1.0f);
        sr.sprite = mySprite;
        transform.position = new Vector3(0.0f, -2.0f, 0.0f);
    }

    void Update()
    {
        rb2D.AddForce(transform.up * thrust);
    }
}