旋转四元数

Question

这是一个向玩家发射激光的炮塔的代码，一个胶囊。激光目前以错误的旋转方式出来，它是直立的，而不是激光通常的样子。

到目前为止，我的代码运行良好，没有错误。我该如何解决这个问题？

void SpawnLaser(int iter)
{
    for (var j = 0; j < 5; j++)
    {
        Vector3 pos = transform.position;
        var rotation = transform.rotation;
        rotation *= Quaternion.Euler(0, 90, 0);
        Instantiate(projectile, pos, rotation);
    }
}

Answer 1

我不完全确定您的代码的目标，但我可以提供一些指导，并且当我对您的问题有更多了解时可以编辑我的答案。

您的生成没有问题，问题很可能与您的移动有关。另一个问题是你的旋转被乘以一个局部变量，所以每个激光都指向同一个方向。

    // my laser object
    [SerializeField] private GameObject projectile = null;

    private void Update()
    {
        // when I hit space, spawn new lasers
        if (Input.GetKeyDown(KeyCode.Space))
            SpawnLaser();
    }

    void SpawnLaser()
    {
        // keep the rotation outside of the loop so the *= 90 will change the angle the object is positioned to look at
        var rotation = transform.rotation;

        // as the angle is *= 90, there are only 4 possible rotations, so I would adjust your loop or rotation product
        for (int j = 0; j < 4; j++)
        {
            Vector3 pos = transform.position;
            rotation *= Quaternion.Euler(0, 90, 0);

            // I attached a rigidbody to move the objects, if your objects or your player do not have rigidbodies, then they will not collide
            Rigidbody laserObj = Instantiate(projectile, pos, rotation).GetComponent<Rigidbody>();

            // I am adding a force of 10 in the forward direction of my newly spawned laser
            laserObj.AddForce(laserObj.transform.forward * 10f);
        }
    }

确保将刚体组件和碰撞器组件添加到正在生成的预制件中。您需要做的其他事情是在激光器上添加一层，这样它们就不会相互碰撞。查看Layer-based collisions。确保为您的激光添加一个图层并禁用与自身的碰撞，以免与其他激光发生碰撞。

至于你的碰撞问题，原因有很多，这里不再一一列举，而是链接到an answer that goes over the possible reason。

编辑：在给出更多信息后，这可能更接近您想要实现的目标。

    // this script is on the object that will be firing the laser, a turret, gun, etc.

    [SerializeField] private GameObject projectile = null;      // laser prefab 
    [SerializeField] private Transform playerObjectPos = null;        // reference to what we are trying to aim at (player, enemy, etc.)

    private float laserFiringForce = 10f;

    private void Update()
    {
        // when I hit space, spawn new laser spawns
        if (Input.GetKeyDown(KeyCode.Space))
            SpawnLaser(playerObjectPos);
    }

    /// <summary>
    /// Spawns a laser aiming at a specified target
    /// </summary>
    /// <param name="target"></param>
    void SpawnLaser(in Transform target)
    {
        // lock our rotation to only Y-axis
        Vector3 targetPosition = new Vector3(target.position.x, transform.position.y, target.position.z);

        // have our turret / player / etc. look at the target position
        transform.LookAt(targetPosition);

        // instantiate a laser at the position of our turret / player and have its rotation aim in the same direction as our turret / player
        // while grabbing the reference to the rigidbody component on the laser so we can add a force to it (Note: You can have the movement logic on the laser itself instead of doing it here)
        Rigidbody laserObj = Instantiate(projectile, transform.position, Quaternion.LookRotation(transform.forward, Vector3.up)).GetComponent<Rigidbody>();

        // add a force in the direction the laser is facing so it moves
        laserObj.AddForce(laserObj.transform.forward * laserFiringForce);
    }

我会研究一个您可以学习的 FPS 或 3D 炮塔游戏教程。鉴于这些问题，我认为您对编程、Unity 或两者都比较陌生。如果这是您的第一个项目，请查看教程，创建它并将其更改为更多您的项目。完成一些教程后，您应该对 Unity 有更好的了解。如果您是一起编程的新手，我也会考虑研究 c# 和一般编程的类、文档等。

要开始使用 Unity，请尝试 Brackey's。我链接的教程是他的 3D 塔防游戏的第 4 集，他在那里制作了炮塔。