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()
 {
  ///*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;
 }
 
}

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。