Question

我在Unity3D中编写了此代码，该代码应将对象旋转一圈，是这种情况，只是不考虑起始位置。我不明白为什么职位不考虑开始写的功能

public class RotationCircuit : MonoBehaviour
{
    float timeCounter = 0;

    float speed;
    float width;
    float height;

    private float startPosY;
    private float startPosX;
    private float startPosZ;

    void Start()
    {
        speed = 1;
        width = 4; //largueur
        //height = 1; //hauteur

        startPosX = transform.position.x;
        startPosY = transform.position.y;
        startPosZ = transform.position.z;

        float y = GetComponent<Transform>().position.y;
        float x = GetComponent<Transform>().position.x;
        float z2 = GetComponent<Transform>().position.z;

        transform.position = new Vector3(x, y, z2);
    }

    void Update()
    {
        timeCounter += Time.deltaTime * speed;

        float x2 = Mathf.Cos(timeCounter) * width;
        //float y2 = Mathf.Sin(timeCounter) * height; //utile pour faire des haut et bas
        float y2 = GetComponent<Transform>().position.y;
        float z2 = GetComponent<Transform>().position.z;

        transform.position = new Vector3(x2, y2, z2);
    }
}

Answer 1

通常，您应该使用transform.position而不是GetComponent<Transform>().position

然后您的代码块

float y = transform.position.y;
float x = transform.position.x;
float z2 = transform.position.z;

transform.position = new Vector3(x, y, z2);

绝对没有任何改变...您将获得当前位置，将其存储在局部变量中并写回完全相同的位置...

它们还具有与您已经存储的相同的值

startPosX = transform.position.x;
startPosY = transform.position.y;
startPosZ = transform.position.z;

后来您再也不会使用这些值了。

Update

中的相同内容

float x2 = Mathf.Cos(timeCounter) * width;

float y2 = transform.position.y;
float z2 = transform.position.z;

transform.position = new Vector3(x2, y2, z2);

仅更改通过以下方式计算的头寸的x分量

Mathf.Cos(timeCounter) * width;

在任何时候都不会考虑首字母transform.position.x或startPosX。

我不完全知道您想如何考虑起始位置，但看起来像这样：

// Little hint: By making those fields serialized
// you can adjust those values directly in the Inspector
// especially while running the Game without having to recompile everytime
[SerializedField] private float speed = 1;
[SerializedField] private float width = 4;
[SerializedField] private float height = 1;

private float timeCounter = 0;
private Vector3 startPosition;

private void Start()
{
    // you can simply store the Vector3 position
    // no need to store each component individually
    startPosition = transform.position;
}

private void Update()
{
    timeCounter += Time.deltaTime * speed;

    var x = Mathf.Cos(timeCounter) * width;
    var y = Mathf.Sin(timeCounter) * height;

    //           from the startPosition    move x right          and y up
    transform.position = startPosition + Vector3.right * x + Vector3.up * y;
}

开头的对象跳一次，即width向右跳一次，显然与Mathf.Cos相对，1在开始时间0上。

如何解决起始位置问题？

1 个答案: