Unity3D实现物体旋转缩放移动效果

本文实例为大家分享了Unity3D实现物体旋转缩放移动的具体代码，供大家参考，具体内容如下

由于项目运行在安卓上，运用到了插件，比较麻烦。你们可以在触发条件上进行修改，不用插件也可以。

1.下载FingerGestures 插件 下载地址 点击打开链接

2.导入插件,创建场景 将预设Finger Gestures Initializer 拖拽到 Hierarchy 视图中

3.添加脚本，拖拽到摄像机上。创建一个方块拖拽到脚本target 属性上。

using UnityEngine;
using System.Collections;

public class ObjectControl : MonoBehaviour
{
public Transform target;
public float yawSensitivity = 80.0f;
public float pitchSensitivity = 160.0f;
public bool clampPitchAngle = true;
public float pinchZoomSensitivity = 0.5f;//缩放速度
public float smoothZoomSpeed = 10.0f;
public float smoothOrbitSpeed = 20.0f;
public float distance = 0;

float yaw = 0;
float pitch = 0;
float idealYaw = 0;
float idealPitch = 0;
float fChangeScale = 0;
float fChangeideal = 0;
public Transform[] movementP;

/// <summary>
/// 控制模式枚举
/// </summary>
public enum ControlModel
{
Zoom, Rotate, Translate
}

public ControlModel controlModel = ControlModel.Rotate;

//Vector3 position=new Vector3();
public bool bArrive = false;//鼠标是否到达零件箱边界区域
//平移方式是否根据鼠标拖动距离还是直接置为鼠标位置
public bool ifDragMove = false;
//平移方式为：根据鼠标拖动距离 时，评议的速度
public float moveSpeed = 1.0f;
//是够需要画出按钮（缩放、旋转、平移）
public bool ifDrawBtn = true;
//缩放方式改为：改变相机范围
public bool zoomCamera = false;
//zoomCamera = true ，相机的最小范围值
public float minZoom = 0f;
//zoomCamera = true ，相机的最大范围值
public float maxZoom = 179f;
//平移对象
public Transform moveTarget;
//平移对象的初始位置
Vector3 moveTargetPos;
//模型的直接父对象
public Transform parentModel;
Vector3 parentModelPos;

void Start()
{
zoomCamera = true;
}

void OnEnable()
{

FingerGestures.OnDragMove += FingerGestures_OnDragMove;
FingerGestures.OnPinchMove += FingerGestures_OnPinchMove;
FingerGestures.OnFingerDragEnd += OnFingerDragEnd;

}

void OnDisable()
{
FingerGestures.OnDragMove -= FingerGestures_OnDragMove;
FingerGestures.OnPinchMove -= FingerGestures_OnPinchMove;
FingerGestures.OnFingerDragEnd -= OnFingerDragEnd;
}

public void setRotation()
{
Vector3 angles = target.eulerAngles;
yaw = idealYaw = angles.y;
pitch = idealPitch = angles.x;
}

void FingerGestures_OnDragMove(Vector2 fingerPos, Vector2 delta)
{
onDrag = true;
try
{
 Screen.showCursor = false;
}
catch
{
 Screen.showCursor = false;
}
if (controlModel == ControlModel.Rotate && !bArrive)
{
 idealYaw -= delta.x * yawSensitivity * 0.02f;
 idealPitch += delta.y * pitchSensitivity * 0.02f;
 len = delta;
 if (target) target.transform.Rotate(new Vector3(delta.y, -delta.x, 0), Space.World);
}
if (controlModel == ControlModel.Translate && !bArrive)
{
 if (ifDragMove)
 {
 if (moveTarget == null)
 {
  target.position = new Vector3(target.position.x + delta.x * moveSpeed, target.position.y + delta.y * moveSpeed, target.localPosition.z);// GetWorldPos( fingerPos );
 }
 else
 {
  moveTarget.position = new Vector3(moveTarget.position.x + delta.x * moveSpeed, moveTarget.position.y + delta.y * moveSpeed, moveTarget.localPosition.z);
 }
 }
 else
 {
 if (moveTarget == null)
 {
  target.position = GetWorldPos(fingerPos);
 }
 else
 {
  moveTarget.position = GetWorldPos(fingerPos);
 }
 }
}

}

void FingerGestures_OnPinchMove(Vector2 fingerPos1, Vector2 fingerPos2, float delta)
{

if (controlModel == ControlModel.Zoom && !bArrive)
{
 if (zoomCamera)
 {
 float fZoom = camera.fieldOfView - delta * pinchZoomSensitivity * 800 * Time.deltaTime;
 fZoom = Mathf.Min(fZoom, maxZoom);
 fZoom = Mathf.Max(fZoom, minZoom);
 camera.fieldOfView = Mathf.Lerp(camera.fieldOfView, fZoom, Time.deltaTime * smoothZoomSpeed);
 // camera.transform.position = target.position - fZoom * camera.transform.forward;
 }
 else
 {

fChangeScale = target.localScale.x + delta * pinchZoomSensitivity;

Vector3 vc = new Vector3(fChangeScale, fChangeScale, fChangeScale);
 }
}
}
//滑动结束
void OnFingerDragEnd(int fingerIndex, Vector2 fingerPos)
{
Screen.showCursor = true;

onDrag = false;
}

//把Unity屏幕坐标换算成3D坐标
Vector3 GetWorldPos(Vector2 screenPos)
{
// Camera mainCamera = Camera.main;
Camera mainCamera = GameObject.FindGameObjectWithTag("MainCamera").GetComponent<Camera>();
if (!mainCamera.enabled)
{
 mainCamera = mainCamera.transform.parent.FindChild("CameraOne").GetComponent<Camera>();
}
return mainCamera.ScreenToWorldPoint(new Vector3(screenPos.x, screenPos.y, Mathf.Abs(target.position.z - mainCamera.transform.position.z)));
}

void Apply()
{
if (controlModel == ControlModel.Rotate && !bArrive)
{
 yaw = Mathf.Lerp(yaw, idealYaw, Time.deltaTime * smoothOrbitSpeed);
 pitch = Mathf.Lerp(pitch, idealPitch, Time.deltaTime * smoothOrbitSpeed);
}
}
bool onDrag;
Vector2 len;

void LateUpdate()
{
if (Input.GetMouseButtonUp(1) || Input.GetMouseButtonUp(0))
{
 Screen.showCursor = true;
}
Apply();
}

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);
}

void Update()
{
///自由切换

if (Input.GetMouseButtonDown(0))
{

controlModel = ControlModel.Translate;
}

if (Input.GetMouseButtonDown(1))
{

controlModel = ControlModel.Rotate;
}

if (Input.GetAxis("Mouse ScrollWheel") != 0)
{
 controlModel = ControlModel.Zoom;
}

}

/// <summary>
/// 复位
/// </summary>
public void ResetValue()
{
if (moveTarget != null)
{
 moveTarget.localPosition = moveTargetPos;
}
if (parentModel != null)
{
 parentModel.localPosition = parentModelPos;
}
yaw = 0;
pitch = 0;
idealYaw = 0;
idealPitch = 0;
}

}

来源：https://blog.csdn.net/qq_27361571/article/details/51354717