ThisRotate 物体旋转 unity3d

using UnityEngine;

using System.Collections;

public class ThisRotate : MonoBehaviour

{

Vector3 StartPosition;

Vector3 previousPosition;

Vector3 offset;

Vector3 finalOffset;

Vector3 eulerAngle;

bool isSlide;

float angle;

public float scale = 1;

RaycastHit hit;

void Start()

{

}

void OnGUI()

{

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

if(Physics.Raycast(ray, out hit))

{

if (hit.transform == transform)

{

if (Input.GetAxis("Mouse ScrollWheel") != 0)

{

Debug.Log(Input.GetAxis("Mouse ScrollWheel"));

scale = scale + Input.GetAxis("Mouse ScrollWheel");

transform.localScale = new Vector3(1 + scale, 1 + scale, 1 + scale);

}

}

}

}

void Update()

{

if (Input.GetMouseButtonDown(0))

{

StartPosition = Input.mousePosition;

previousPosition = Input.mousePosition;

}

if (Input.GetMouseButton(0))

{

offset = Input.mousePosition - previousPosition;

previousPosition = Input.mousePosition;

transform.Rotate(Vector3.Cross(offset, Vector3.forward).normalized, offset.magnitude, Space.World);

}

if (Input.GetMouseButtonUp(0))

{

finalOffset = Input.mousePosition - StartPosition;

isSlide = true;

angle = finalOffset.magnitude;

}

if (isSlide)

{

transform.Rotate(Vector3.Cross(finalOffset, Vector3.forward).normalized, angle * 2 * Time.deltaTime, Space.World);

if (angle > 0)

{

angle -= 5;

}

else

{

angle = 0;

}

}

}

}