总结unity中操作物体任意方向旋转的三种方法

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方法一：

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private Transform hitTransfrom;

void Update()
{
if (Input.GetMouseButtonDown(0))
{
      RaycastHit hit;
      Ray mouseray = Camera.main.ScreenPointToRay(Input.mousePosition);
      if (Physics.Raycast(mouseray, out hit))
      {
         hitTransfrom = hit.transform;
      }
}
else if (Input.GetMouseButtonUp(0))
{
      hitTransfrom = null;
}
if (hitTransfrom)
{
      Matrix4x4 localmatrix = hitTransfrom.worldToLocalMatrix;
      Vector3 vUp = localmatrix.MultiplyVector(new Vector3(0, 1, 0));
      Vector3 vRight = -localmatrix.MultiplyVector(new Vector3(1, 0, 0));
      float fMoveX = -Input.GetAxis("Mouse X") * Time.deltaTime * 200.0f;
      Quaternion rotation = Quaternion.AngleAxis(fMoveX, vUp);
      hitTransfrom.localRotation *= rotation;
      float fMoveY = -Input.GetAxis("Mouse Y") * Time.deltaTime * 200.0f;
      Quaternion rotoy = Quaternion.AngleAxis(fMoveY, vRight);
      hitTransfrom.localRotation *= rotoy;
}
}

方法二：

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using UnityEngine;
using System.Collections;

public class DragRotate : MonoBehaviour
{
void OnMouseDrag ()
{
      this.transform.Rotate(new Vector3(Input.GetAxis("Mouse Y"),-Input.GetAxis("Mouse X"),0)*6f,Space.World);
}

}

方法三（带惯性的拖拽）：

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using UnityEngine;
using System.Collections;

public class DragRotate : MonoBehaviour
{
private bool onDrag = false;
public float speed = 6f;
private float tempSpeed;
private float axisX;
private float axisY;
void OnMouseDrag ()
{
      onDrag = true;
      axisX=-Input.GetAxis ("Mouse X");
      axisY=Input.GetAxis ("Mouse Y");
}

float Rigid ()
{
      if (onDrag) {
         if (tempSpeed < speed) {
            tempSpeed += speed * Time.deltaTime*5;
         }else{
            tempSpeed=speed;
         }
      } else {
         if(tempSpeed>0){
            tempSpeed-=speed * Time.deltaTime;
         }else{
            tempSpeed = 0;
         }
      }
      return tempSpeed;
}

void Update ()
{
      this.transform.Rotate (new Vector3 (axisY, axisX, 0) * Rigid (), Space.World);
      if (!Input.GetMouseButton (0)) {
         onDrag = false;
      }
}
}

另外入了缩放的代码，缩放、自动旋转、拖拽物体的综合：

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using UnityEngine;
using System.Collections;


/**

* @Function:使物体自动旋转，鼠标能够360°拖转物体，托转物体的时候，自动旋转停止，同时滚轮实现物体的缩放功能
* @Ahthor:黄杰
* @Date:2013-04-24

*/
public class ZoomAndDrag : MonoBehaviour {


public Camera MainCamera;
public float ZoomMin;    //滚轮的最小值
public  float ZoomMax;    //滚轮的最大值
private float normalDistance; //设置摄像机的景深值
private float MouseWheelSencitivity = 10.0f; //鼠标灵敏度,就是缩放的速度的快慢

private float axisX;
private float axisY;
public float speed = 6f;
private float tempSpeed;

private bool RoationOnly;

void Start ()
{
      normalDistance = 50.0f;
      ZoomMin = 20.0f;
      ZoomMax = 100.0f;
      RoationOnly = true;
}


void Update ()
{
      Roation();
      Zoom();
      this.transform.Rotate(new Vector3(axisY, axisX, 0) * Rigid(), Space.World);    //物体旋转的方法
}


//自动旋转物体的方法，放在Update中调用
void Roation()
{
      if (RoationOnly)
      {
         gameObject.transform.Rotate(Vector3.up * Time.deltaTime * 10);
      }
}

/****
*鼠标滚轮缩放物体的方法
   *
   * **/
void Zoom()
{
      if (Input.GetAxis("Mouse ScrollWheel") != 0)
      {
         if (normalDistance >= ZoomMin && normalDistance <= ZoomMax)
         {
            normalDistance -= Input.GetAxis("Mouse ScrollWheel") * MouseWheelSencitivity;
         }
         if (normalDistance < ZoomMin)
         {
            normalDistance = ZoomMin;
         }
         if (normalDistance > ZoomMax)
         {
            normalDistance = ZoomMax;
         }

         MainCamera.fieldOfView = normalDistance;
      }
}
  /***
*
* 鼠标左键控制物体360°旋转+惯性
* **/
float Rigid()
{
      if (Input.GetMouseButton(0))
      {
         RoationOnly = false; //当鼠标按下的时候，停止自动旋转

         axisX = Input.GetAxis("Mouse X");
         axisY = Input.GetAxis("Mouse Y");
         if (tempSpeed < speed)
         {
            tempSpeed += speed * Time.deltaTime * 5;
         }
         else
         {
            tempSpeed = speed;
         }
      }
      else
      {
         RoationOnly = true;    //当鼠标没有按下的时候，恢复自动旋转
         if (tempSpeed > 0)
         {
            tempSpeed -= speed * Time.deltaTime;
         }
         else
         {
            tempSpeed = 0;
         }
      }
      return tempSpeed;
}
}

[分享] 总结unity中操作物体任意方向旋转的三种方法

[分享] 总结unity中操作物体任意方向旋转的三种方法