Unity3D 鼠標拖動和旋轉物體以及鼠標拖動圖片

1.鼠標拖動物體Cube
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.EventSystems;
///
/// 腳本掛到一個Cube上
///
public class Ts : MonoBehaviour
{

public Texture2D mouseTexture;//鼠標樣式紋理圖
public Vector3 mousePos;


void Start()
{

}

void OnMouseEnter()
{
    //更換鼠標的樣式
    Cursor.SetCursor (this.mouseTexture, Vector2.zero, CursorMode.Auto);

}

void OnMouseExit()
{
    //恢復回鼠標的樣式
    Cursor.SetCursor (null, Vector2.zero, CursorMode.Auto);

}

//通過鼠標拖動物體Cube
IEnumerator OnMouseDown()
{

    mousePos = Input.mousePosition;

    while (Input.GetMouseButton(0))
    {
        Vector3 offset = mousePos - Input.mousePosition;
        //左右旋轉
        transform.Rotate(Vector3.up * offset.x, Space.World);  
        //上下旋轉
        transform.Rotate(Vector3.right*offset.y,Space.World);

        mousePos=Input.mousePosition;
        yield return null;
    }
}

}

2.鼠標旋轉物體
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.EventSystems;
///
/// 腳本掛到一個Cube上
///

public class Ts : MonoBehaviour
{

public Texture2D mouseTexture;//鼠標樣式紋理圖
public Vector3 mousePos;


void Start()
{

}

void OnMouseEnter()
{
    //更換鼠標的樣式
    Cursor.SetCursor (this.mouseTexture, Vector2.zero, CursorMode.Auto);

}

void OnMouseExit()
{
    //恢復回鼠標的樣式
    Cursor.SetCursor (null, Vector2.zero, CursorMode.Auto);

}



//通過鼠標移動物體Cube
IEnumerator OnMouseDown()
{
    Vector3 screenSpace = Camera.main.WorldToScreenPoint(transform.position);//三維物體座標轉屏幕座標
    //將鼠標屏幕座標轉爲三維座標，再計算物體位置與鼠標之間的距離
    var offset = transform.position - Camera.main.ScreenToWorldPoint(new Vector3(Input.mousePosition.x, Input.mousePosition.y, screenSpace.z));
    print("down");
    while (Input.GetMouseButton(0))
    {
        Vector3 curScreenSpace = new Vector3(Input.mousePosition.x, Input.mousePosition.y, screenSpace.z);
        var curPosition = Camera.main.ScreenToWorldPoint(curScreenSpace) + offset;
        transform.position = curPosition;
        yield return new WaitForFixedUpdate();
    }
}

}

3.鼠標拖動圖片
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.EventSystems;
///
/// 腳本掛到一個Cube上
///

public class Ts : MonoBehaviour
{

public Texture2D mouseTexture;//鼠標樣式紋理圖
public Vector3 mousePos;


void Start()
{

}

void OnMouseEnter()
{
    //更換鼠標的樣式
    Cursor.SetCursor (this.mouseTexture, Vector2.zero, CursorMode.Auto);

}

void OnMouseExit()
{
    //恢復回鼠標的樣式
    Cursor.SetCursor (null, Vector2.zero, CursorMode.Auto);

}




//通過鼠標移動圖片
public void OnDrag(BaseEventData baseEventData)     
{      
    PointerEventData data = baseEventData as PointerEventData;   
    var rt = data.pointerPress.GetComponent<RectTransform>();   
    Vector3 globalMousePos;  
    if (RectTransformUtility.ScreenPointToWorldPointInRectangle(rt, data.position, data.pressEventCamera, out globalMousePos))     
    {      
        rt.position = globalMousePos;   
    }   
} 

}
鼠標拖動圖片需要在Inspector視圖裏添加EventTrigger組件