Unity3D 鼠标拖动和旋转物体以及鼠标拖动图片

1.鼠标拖动物体Cube

using System.Collections;

using System.Collections.Generic;

using UnityEngine;

using UnityEngine.EventSystems;

///

/// 脚本挂到一个Cube上

///

public class Ts : MonoBehaviour

{

public Texture2D mouseTexture;//鼠标样式纹理图
public Vector3 mousePos;

void Start()
{

}

void OnMouseEnter()
{
//更换鼠标的样式
Cursor.SetCursor (this.mouseTexture, Vector2.zero, CursorMode.Auto);

}

void OnMouseExit()
{
//恢复回鼠标的样式
Cursor.SetCursor (null, Vector2.zero, CursorMode.Auto);

}

//通过鼠标拖动物体Cube
IEnumerator OnMouseDown()
{

mousePos = Input.mousePosition;

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

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

}

2.鼠标旋转物体

using System.Collections;

using System.Collections.Generic;

using UnityEngine;

using UnityEngine.EventSystems;

///

/// 脚本挂到一个Cube上

///

public class Ts : MonoBehaviour

{

public Texture2D mouseTexture;//鼠标样式纹理图
public Vector3 mousePos;

void Start()
{

}

void OnMouseEnter()
{
//更换鼠标的样式
Cursor.SetCursor (this.mouseTexture, Vector2.zero, CursorMode.Auto);

}

void OnMouseExit()
{
//恢复回鼠标的样式
Cursor.SetCursor (null, Vector2.zero, CursorMode.Auto);

}

//通过鼠标移动物体Cube
IEnumerator OnMouseDown()
{
Vector3 screenSpace = Camera.main.WorldToScreenPoint(transform.position);//三维物体坐标转屏幕坐标
//将鼠标屏幕坐标转为三维坐标，再计算物体位置与鼠标之间的距离
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.鼠标拖动图片

using System.Collections;

using System.Collections.Generic;

using UnityEngine;

using UnityEngine.EventSystems;

///

/// 脚本挂到一个Cube上

///

public class Ts : MonoBehaviour

{

public Texture2D mouseTexture;//鼠标样式纹理图
public Vector3 mousePos;

void Start()
{

}

void OnMouseEnter()
{
//更换鼠标的样式
Cursor.SetCursor (this.mouseTexture, Vector2.zero, CursorMode.Auto);

}

void OnMouseExit()
{
//恢复回鼠标的样式
Cursor.SetCursor (null, Vector2.zero, CursorMode.Auto);

}

//通过鼠标移动图片
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;
}
}

}

鼠标拖动图片需要在Inspector视图里添加EventTrigger组件