Unity3d 鼠标滚动拉近模型、鼠标右键旋转模型、鼠标中键拖拽模型

鼠标滚动拉近模型、鼠标右键旋转模型、鼠标中键拖拽模型

把如下代码直接挂在摄像机对象上

C#

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using UnityEngine;

using System.Collections;

 

public class Script_07_11 : MonoBehaviour

{

 

public Transform target;

private int MouseWheelSensitivity = 1;

private int MouseZoomMin = 1;

private int MouseZoomMax = 5;

private float normalDistance = 3;

 

private Vector3 normalized;

 

private float xSpeed = 250.0f;

private float ySpeed = 120.0f;

 

private int yMinLimit = -20;

private int yMaxLimit = 80;

 

private float x = 0.0f;

private float y = 0.0f;

 

private Vector3 screenPoint;

private Vector3 offset;

 

private Quaternion rotation = Quaternion.Euler(new Vector3(30f,0f,0f));

private Vector3 CameraTarget;

void Start ()

{

 

CameraTarget = target.position;

 

float z = target.transform.position.z - normalDistance;

transform.position = rotation * new Vector3(transform.position.x,transform.position.y,z);

 

transform.LookAt(target);

 

var angles = transform.eulerAngles;

     x = angles.y;

     y = angles.x;

}

 

void Update ()

{

 

if(Input.GetMouseButton(1))

{

    x += Input.GetAxis(“Mouse X”) * xSpeed * 0.02f;

         y -= Input.GetAxis(“Mouse Y”) * ySpeed * 0.02f;

 

y = ClampAngle(y, yMinLimit, yMaxLimit);

 

         var rotation = Quaternion.Euler(y, x, 0);

         var position = rotation * new Vector3(0.0f, 0.0f, -normalDistance) + CameraTarget;

 

         transform.rotation = rotation;

         transform.position = position;

 

}else if (Input.GetAxis(“Mouse ScrollWheel”) != 0)

{

    normalized = (transform.position - CameraTarget).normalized;

 

if (normalDistance >= MouseZoomMin && normalDistance <= MouseZoomMax)

{

normalDistance -= Input.GetAxis(“Mouse ScrollWheel”) * MouseWheelSensitivity;

}

if (normalDistance < MouseZoomMin)

{

normalDistance = MouseZoomMin;

}

if (normalDistance > MouseZoomMax)

{

normalDistance = MouseZoomMax;

}

transform.position =    normalized * normalDistance;

 

}else if(Input.GetMouseButtonDown(2))

{

     screenPoint = Camera.main.WorldToScreenPoint(target.transform.position);

     offset = target.transform.position - Camera.main.ScreenToWorldPoint(new Vector3(Input.mousePosition.x, Input.mousePosition.y, screenPoint.z));

}

 

if(Input.GetMouseButton(2))

{

Vector3 curScreenPoint = new Vector3(Input.mousePosition.x, Input.mousePosition.y, screenPoint.z);

 

Vector3 curPosition = Camera.main.ScreenToWorldPoint(curScreenPoint) + offset;

target.transform.position = curPosition;

}

transform.LookAt(CameraTarget);

 

}

 

static float ClampAngle (float angle , float min ,float  max)

{

if (angle < -360)

angle += 360;

if (angle > 360)

angle -= 360;

return Mathf.Clamp (angle, min, max);

}

}

最后是工程下载地址：http://vdisk.weibo.com/s/Dorl2