在 x 和 z 轴上拖动对象

Question

我只是想用鼠标拖动来移动对象。对象是父对象的子对象。这就是代码中使用 localPosition 的原因。Vector3 startPos;Vector3 dist;void OnMouseDown(){    startPos = Camera.main.WorldToScreenPoint(transform.localPosition);    dist = transform.localPosition - Camera.main.ScreenToWorldPoint(new Vector3(Input.mousePosition.x, Input.mousePosition.y, startPos.z));}void OnMouseDrag(){    Vector3 lastPos = new Vector3(Input.mousePosition.x, Input.mousePosition.y, startPos.z);    transform.localPosition = Camera.main.ScreenToWorldPoint(lastPos) + dist;}预期在 x&z 轴上移动对象，但在 x&y 上移动。

Answer 1

您需要翻转它，以便使用 Input.mousePosition.y 作为 z 轴，使用 startPos 作为 y 轴。这应该有效：

public class MovementController : MonoBehaviour

{

    private const float planeY = 0f;

    Plane plane = new Plane(Vector3.up, Vector3.up * planeY); // ground plane

    void OnMouseDrag()

    {

        Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);

        float distance; // the distance from the ray origin to the ray intersection of the plane

        if(plane.Raycast(ray, out distance))

        {

            transform.position = ray.GetPoint(distance); // distance along the ray

        }

    }

}