unity3d - 从鼠标点击位置获取变换

Question

试过一百万种方法，总是会出现转换错误。我只是在一个平面上四处点击，希望鼠标在点击时的位置被泵入一个转换变量，这样我的角色就​​会走向那个点。我正在使用 var target: Transform; 来定义角色移动的位置。我如何从世界空间中的点击中提取这种类型的变量，它将与平面(或任何东西)相交？

var WalkingSpeed = .05;

// The target marker.
var target: Transform;

// Speed in units per sec.
var speed: float;

static var mousePos : Vector3;

function Update() {
    // get distance between objects current position and the target position
    var distance = Vector3.Distance (target.transform.position, transform.position);

    if(distance > 0) {
        // we are still not at the target, do walking animation
        animation["walk"].speed = 1;    // set speed of animation
        animation.CrossFade("walk");    // actually play the animation
    } else {
        animation["idle"].speed = 1;    // set speed of animation
        animation.CrossFade("idle");    // actually play the animation
    }
    //Debug.Log(distance);

    // The step size is equal to speed times frame time.
    var step = speed * Time.deltaTime;

    // Move our position a step closer to the target.
    transform.position = Vector3.MoveTowards(transform.position, target.position, step);

    // Also rotate towards the point
    var targetDir = target.position - transform.position;
    var newDir = Vector3.RotateTowards(transform.forward, targetDir, step, 0.0);
    // Move our position a step closer to the target.
    transform.rotation = Quaternion.LookRotation(newDir);

    Debug.DrawRay(transform.position, newDir, Color.red);   // draw something showing direction (for debug)

    // on click, set new target position
    if (Input.GetMouseButton(0)) {
        var posVec = Input.mousePosition;
        posVec.z = transform.position.z - Camera.main.transform.position.z;
        target = Camera.main.ScreenToWorldPoint(posVec);

    }
}

这个特别是 throws 不能将 vector3 转换为 transform

Answer 1

有两种方法可以做到这一点，具体取决于您使用的相机类型。将任一脚本附加到您要移动的对象即可。确保将其放入 Update()。

正字法

if(Input.GetMouseButton(0))
{
    var posVec = Camera.main.ScreenToWorldPoint(Input.mousePosition);
    posVec.z = transform.position.z;

    transform.position = Vector3.MoveTowards(transform.position, posVec, speed * Time.deltaTime);
}

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观点

 if (Input.GetMouseButton(0)) 
 {
     var posVec = Input.mousePosition;
     posVec.z = transform.position.z - Camera.main.transform.position.z;
     posVec = Camera.main.ScreenToWorldPoint(posVec);

     transform.position = Vector3.MoveTowards(transform.position, posVec, speed * Time.deltaTime);
 }

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我还想指出 transform.position 是一个 Vector3。

我可以看出您的脚本已经附加到您要移动的游戏对象。因此，您甚至不需要 target。

transform.position = Vector3.MoveTowards(transform.position, posVec, speed * Time.deltaTime);

将正常工作。

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Video proof that code works .