Question

我希望我的脚本可以使对象跟随鼠标移动，就像跟随

这是我的脚本：

[ExecuteInEditMode]
public class TestMouseDragObjectInSceneMonoBehaviour : MonoBehaviour
{
    private GameObject _cube;

    private GameObject cube
    {
        get
        {
            if (!_cube)
            {
                var c = Resources.Load<GameObject>("Obj/Cube");
                _cube = Instantiate(c);
            }

            return _cube;
        }
    }

    private void OnEnable()
    {
        SceneView.onSceneGUIDelegate += OnSceneGUI;
    }

    private void OnSceneGUI(SceneView sceneview)
    {
        var ev = Event.current;
        if (ev.type == EventType.MouseMove)
        {
            var ray = HandleUtility.GUIPointToWorldRay(ev.mousePosition);
            var hit = new RaycastHit();
            if (Physics.Raycast(ray, out hit, 100))
            {
                cube.transform.position = hit.point;
               Debug.Log(Vector3.Distance(ev.mousePosition, hit.point));
            }
            else
            {
                var ptr = ray.GetPoint(100);
                cube.transform.position = ptr;
            }
        }
    }

    private void OnDisable()
    {
        SceneView.onSceneGUIDelegate -= OnSceneGUI;
    }

    Vector3 GetMousePos(Event ev)
    {
        return GUIUtility.ScreenToGUIPoint(ev.mousePosition);
    }
}

以上代码将导致对象突然变大，如果我的交点是地面点，场景视图中的对象大小应该稳定，我想我没有得到地面点，而是其他交点，如何解决？ / p>

Answer 1

引起问题的原因：射线有时会投射在立方体上。

要修复它，您至少有两个选择：

1）将多维数据集的图层更改为'ignoreRayCast'，或将平面的指定图层蒙版传递给Physics.Raycast（...）

2）创建一个Plane来代表您的“地面”，使用其“ Raycast（...）”成员方法代替Physics.Raycast（...）

Answer 2

感谢@Zhang Qi，我通过确保对象层像“ cube.layer = LayerMask.NameToLayer("Ignore Raycast")”那样“忽略射线广播”来解决它

以下是我的完整代码：

    using UnityEditor;
    using UnityEngine;

    namespace Draft
    {
        [ExecuteInEditMode]
        public class TestMouseDragObjectInSceneMonoBehaviour : MonoBehaviour
        {
            private GameObject _cube;

            private GameObject cube
            {
                get
                {
                    if (!_cube)
                    {
                        var c = Resources.Load<GameObject>("Obj/Cube");
                        _cube = Instantiate(c);
                    }

                    return _cube;
                }
            }

            private void OnEnable()
            {
                SceneView.onSceneGUIDelegate += OnSceneGUI;
            }

            private void OnSceneGUI(SceneView sceneview)
            {
                var ev = Event.current;
                if (ev.type == EventType.MouseMove)
                {
                    cube.layer = LayerMask.NameToLayer("Ignore Raycast");
    //                Vector2 mousePos = Event.current.mousePosition;
    //                mousePos.y = sceneview.camera.pixelHeight - mousePos.y;
    //                var ray = sceneview.camera.ScreenPointToRay(mousePos);
                    var ray = HandleUtility.GUIPointToWorldRay(ev.mousePosition);
    //                cube.transform.position = ptr;
                    var hit = new RaycastHit();
                    if (Physics.Raycast(ray, out hit, 5))
                    {
                        cube.transform.position = hit.point;
    //                    Debug.Log(Vector3.Distance(ev.mousePosition, hit.point));
                    }
                    else
                    {
                        var ptr = ray.GetPoint(5);
                        cube.transform.position = ptr;
                    }
                }
            }

            private void OnDisable()
            {
                SceneView.onSceneGUIDelegate -= OnSceneGUI;
            }

            Vector3 GetMousePos(Event ev)
            {
                return GUIUtility.ScreenToGUIPoint(ev.mousePosition);
            }
        }

}

到达地面点的射线无法到达地面点

2 个答案: