unity3d-2

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关于unity3d的一些运动

物体对象运动的本质

是物体对象位置的改变

物体的抛物线运动

  • 1.

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    // 通过直接改变position来实现
    public float v0 = 10.0f;
    public float a = 2.0f;
    private float t = 0f;

    void Update () {
        t += (float)Time.deltaTime;
        this.transform.position = new Vector3((float)(v0 * t - 0.5 * a * t * t), 0, v0*t);
    }

  • 2.

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    // 通过translate函数来实现
    public float v0 = 5.0f;

    void Update () {
        v0 += 0.5f;
        this.transform.Translate(v0 * Vector3.up * Time.deltaTime);
        transform.Translate(Vector3.right * Time.deltaTime); 
    }

  • 3.

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    // 通过设置游戏对象重力和初速度实现
    void Start () {
        this.GetComponent<Rigidbody>().velocity = new Vector3(5, 10, 0);
    }

太阳系仿真

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// 定义游戏对象
public GameObject Sun;
public GameObject Mercury;
public GameObject Venus;
public GameObject Earth;
public GameObject Moon;
public GameObject Mars;
public GameObject Jupiter;
public GameObject Saturn;
public GameObject Uranus;
public GameObject Neptune;
public GameObject Pluto;
public float speed = 5f;

void Update () {
    // 自转
    Sun.transform.Rotate(Vector3.up * Time.deltaTime * 360);
    Mercury.transform.Rotate(Vector3.up * Time.deltaTime * 360);
    Venus.transform.Rotate(Vector3.up * Time.deltaTime * 360);
    Earth.transform.Rotate(Vector3.up * Time.deltaTime * 360);
    Mars.transform.Rotate(Vector3.up * Time.deltaTime * 360);
    Jupiter.transform.Rotate(Vector3.up * Time.deltaTime * 360);
    Saturn.transform.Rotate(Vector3.up * Time.deltaTime * 360);
    Uranus.transform.Rotate(Vector3.up * Time.deltaTime * 360);
    Neptune.transform.Rotate(Vector3.up * Time.deltaTime * 360);
    Pluto.transform.Rotate(Vector3.up * Time.deltaTime * 360);
    
    // 公转
    Mercury.transform.RotateAround(Sun.transform.position, Vector3.up+0.1f*Vector3.right, speed * Time.deltaTime*34);
    Venus.transform.RotateAround(Sun.transform.position, Vector3.up - 0.1f * Vector3.right, speed * Time.deltaTime*30);
    Earth.transform.RotateAround(Sun.transform.position, Vector3.up + 0.15f * Vector3.right, speed * Time.deltaTime*26);
    Mars.transform.RotateAround(Sun.transform.position, Vector3.up - 0.15f * Vector3.right, speed * Time.deltaTime*22);
    Jupiter.transform.RotateAround(Sun.transform.position, Vector3.up + 0.2f * Vector3.right, speed * Time.deltaTime*18);
    Saturn.transform.RotateAround(Sun.transform.position, Vector3.up - 0.19f * Vector3.right, speed * Time.deltaTime*14);
    Uranus.transform.RotateAround(Sun.transform.position, Vector3.up + 0.18f * Vector3.right, speed * Time.deltaTime*10);
    Neptune.transform.RotateAround(Sun.transform.position, Vector3.up - 0.16f * Vector3.right, speed * Time.deltaTime*6);
    Pluto.transform.RotateAround(Sun.transform.position, Vector3.up + 0.13f * Vector3.right, speed * Time.deltaTime*3);
}