我怎樣才能點擊並用鼠標拖動一個gameobject？

Question

創建新的腳本

using System.Collections; 
using System.Collections.Generic; 
using UnityEngine; 

public class mouseDrag : MonoBehaviour 
{ 
    float distance = 10; 

     void OnMouseDrag() 
     { 
      Vector3 mousePosition = new Vector3(Input.mousePosition.x, Input.mousePosition.y, distance); 
      Vector3 objPosition = Camera.main.ScreenToWorldPoint(mousePosition); 

      transform.position = objPosition; 
     } 
    } 

然後在啓動功能的另一個劇本我創建4個立方體，並添加mouseDrag每個立方體。但是，運行並單擊並拖動時不會發生任何事情。我沒有收到任何錯誤或例外。

void Start() 
    { 
     lp = gameObjectToRaise.transform.localPosition; 
     ls = gameObjectToRaise.transform.localScale; 

     List<GameObject> cubes = new List<GameObject>(); 

     GameObject cube = Cube.CreatePrimitive(Cube.CubePivotPoint.UPLEFT); 
     GameObject cube1 = Cube.CreatePrimitive(Cube.CubePivotPoint.UPRIGHT); 
     GameObject cube2 = Cube.CreatePrimitive(Cube.CubePivotPoint.BACKUP); 
     GameObject cube3 = Cube.CreatePrimitive(Cube.CubePivotPoint.UPRIGHT); 

     cubes.Add(cube); 
     cubes.Add(cube1); 
     cubes.Add(cube2); 
     cubes.Add(cube3); 

     cube.GetComponentInChildren<Renderer>().material.color = Color.blue; 
     cube1.GetComponentInChildren<Renderer>().material.color = Color.red; 
     cube2.GetComponentInChildren<Renderer>().material.color = Color.green; 
     cube3.GetComponentInChildren<Renderer>().material.color = Color.yellow; 

     cube.transform.position = new Vector3(lp.x, lp.y, lp.z - 0.5f); 
     cube1.transform.position = new Vector3(lp.x, lp.y, lp.z); 
     cube2.transform.position = new Vector3(lp.x, lp.y, lp.z + 5); 
     cube3.transform.position = new Vector3(lp.x + 5, lp.y, lp.z); 

     cube1.transform.Rotate(0, 90, 0); 
     cube3.transform.Rotate(0, 90, 0); 

     StartCoroutine(scaleCube(cube.transform)); 
     StartCoroutine(scaleCube(cube1.transform)); 
     StartCoroutine(scaleCube(cube2.transform)); 
     StartCoroutine(scaleCube(cube3.transform)); 

     foreach (GameObject go in cubes) 
     { 
      go.AddComponent<mouseDrag>(); 
     } 
    } 

    IEnumerator scaleCube(Transform trans) 
    { 
     while (raiseAmount < raiseTotal) 
     { 
      raiseAmount += 1f; 
      trans.localScale += new Vector3(speed * Time.deltaTime, speed * Time.deltaTime, 0); 
      yield return null; 
     } 
    } 
} 

Answer 1

我只是一個多維數據集遊戲對象我增加了對測試它 現在試着和它的正常工作。但是，當我使用多維數據集使用CUBE 類助手它不起作用。

在這種情況下，mouseDrag腳本應重視孩子立方體（而不是CubeHolder對象）。之後，你應需而動是「CubeHolder」立方體的父母。

如果您曾經移動子立方體，您將破壞樞軸點。

簡單地改變

transform.position = objPosition; 

到

transform.parent.position = objPosition; 

然後裝上mouseDrag腳本孩子立方體不是「CubeHolder」。

也許問題是它將腳本附加到 parentObject「CubeHolder」而不是創建的多維數據集？

是的。 OnMouseDrag僅在附加到具有Collider的對象時纔會被調用，而子立方體是Collider的唯一對象。父對象只能用作軸心點功能。

注意：

你不應該使用OnMouseDrag這一點。您應該使用新的UI事件拖動多維數據集/對象。 this答案中列出了許多回調函數。

下面的腳本是你應該使用的東西。將CubeDrag sctipt附加到兒童立方體上，然後將transform.position的所有內容更改爲transform.parent.position。

using UnityEngine; 
using UnityEngine.EventSystems; 
public class CubeDrag: MonoBehaviour, IPointerDownHandler, IDragHandler, IEndDragHandler 
{ 
    Camera mainCamera; 
    float zAxis = 0; 
    Vector3 clickOffset = Vector3.zero; 

    // Use this for initialization 
    void Start() 
    { 
     addEventSystem(); 
     zAxis = transform.position.z; 
    } 

    public void OnPointerDown(PointerEventData eventData) 
    { 
     Vector3 tempPos = eventData.position; 
     tempPos.z = Vector3.Distance(transform.position, Camera.main.transform.position); 
     clickOffset = transform.position - mainCamera.ScreenToWorldPoint(tempPos); 
     Debug.Log("Mouse Down"); 
    } 

    public void OnDrag(PointerEventData eventData) 
    { 
     Vector3 tempPos = eventData.position; 
     tempPos.z = Vector3.Distance(transform.position, Camera.main.transform.position); 
     Vector3 tempVec = mainCamera.ScreenToWorldPoint(tempPos) + clickOffset; 
     tempVec.z = zAxis; 

     transform.position = tempVec; 
     Debug.Log("Dragging Cube"); 
    } 

    public void OnEndDrag(PointerEventData eventData) 
    { 

    } 

    void addEventSystem() 
    { 
     mainCamera = Camera.main; 
     if (mainCamera.GetComponent<PhysicsRaycaster>() == null) 
      mainCamera.gameObject.AddComponent<PhysicsRaycaster>(); 

     EventSystem eveSys = GameObject.FindObjectOfType(typeof(EventSystem)) as EventSystem; 
     if (eveSys == null) 
     { 
      GameObject tempObj = new GameObject("EventSystem"); 
      eveSys = tempObj.AddComponent<EventSystem>(); 
     } 

     StandaloneInputModule stdIM = GameObject.FindObjectOfType(typeof(StandaloneInputModule)) as StandaloneInputModule; 
     if (stdIM == null) 
      stdIM = eveSys.gameObject.AddComponent<StandaloneInputModule>(); 
    } 
}