Unity3D研究院之鼠标拉近旋转拖拽模型（六十）

今天帮一个朋友看了个虚拟现实的项目，他希望实现鼠标滚动拉近模型、鼠标右键旋转模型、鼠标中键拖拽模型，部分功能网上已经有答案、但是合在一起的没有找到，哪么我就加以总结把把功能都写在这个demo中吧。

把如下代码直接挂在摄像机对象上。最近心情很down，有点懒了就不写注释了，如果有朋友有疑问欢迎给我留言。。

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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

本文固定链接: https://www.xuanyusong.com/archives/2341
转载请注明: 雨松MOMO 2013年05月29日于雨松MOMO程序研究院发表

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最后编辑：2013-05-29

作者：雨松MOMO

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