Unity UGUI实现卡片椭圆方向滚动

本文实例为大家分享了ugui实现卡片椭圆方向滚动的具体代码，供大家参考，具体内容如下

搭建简单的场景

运行效果

卡片移动动画通过插件dotween实现

控制脚本：

using unityengine;
using system.collections;
using unityengine.ui;
using dg.tweening;
public class cardmove : monobehaviour {
 gameobject[] sprites;
 int halfsize;
 vector2 screencenterpos;
 public float startangle;//中间卡牌的角度
 public float deltaangle;//相邻卡牌的角度差值
 public float movespeed;//移动动画的速度

 public vector3 center;//椭圆中心点
 public float a = 1;//long axis
 public float b = 1;//short axis
 int cardcount;
 // use this for initialization
 void start () {
  init ();
 }

 // update is called once per frame
 void update () {

 }
 /// <summary>
 /// 初始化卡牌显示位置
 /// </summary>
 void init(){
  screencenterpos = new vector2 (screen.width*0.5f,screen.height*0.5f);
  cardcount = transform.childcount;
   halfsize = (cardcount - 1) / 2;
  sprites=new gameobject[cardcount];
  for (int i = 0; i < cardcount; i++) {
   sprites [i] = transform.getchild (i).gameobject;
   setposition (i,false);
   setdeeps (i);

  }

 }
 /// <summary>
 /// 椭圆的半长轴为a，半短轴为b，计算椭圆上一点的位置
 /// x=a*cos(angle),y=b*sin(angle)
 /// </summary>
 /// <param name="index">index.</param>
 /// <param name="usertweener">是否使用tween动画.</param>
 void setposition(int index,bool usertweener=true){
  //计算每一张卡片在椭圆上相对中间卡牌的角度
  float angle = 0;
  if(index<halfsize){//left
   angle=startangle-(halfsize-index)*deltaangle;

  }else if(index>halfsize){//right

   angle = startangle + (index - halfsize) * deltaangle;
  }else{//medim
   angle=startangle;
  }


  //通过卡牌的角度，计算对应的位置
  float xpos = a*mathf.cos((angle/180)*mathf.pi);//+center.x;
  float ypos = b*mathf.sin((angle/180)*mathf.pi);//+center.y;
  debug.log ("index="+index+",xpos="+xpos+",ypos="+ypos);

  vector2 pos = new vector2 (xpos,ypos);
//  debug.log ("screenpos="+screenpos+",wordpos="+wordpos);

//通过dotween控制卡片移动动画
  if(!usertweener){
   sprites [index].getcomponent<image> ().recttransform.domove(new vector2(screencenterpos.x+pos.x,screencenterpos.y+pos.y),0f);
  }else
   sprites [index].getcomponent<image> ().recttransform.domove(new vector2(screencenterpos.x+pos.x,screencenterpos.y+pos.y),1f);

 }
 /// <summary>
 /// 计算每一张卡片的层级
 /// </summary>
 /// <param name="index">index.</param>
 void setdeeps(int index){
  int deep = 0;
  if (index < halfsize) {//左侧卡牌层级，从左侧到中间，层级依此递增
   deep=index;
  } else if (deep > halfsize) {//右侧卡牌层级，从中间到右侧，层级依此递减
   deep=sprites.length-(index+1);
  } else {
   deep = halfsize;
  }

  sprites [index].getcomponent<recttransform> ().setsiblingindex (deep);
 }
 /// <summary>
 /// 左侧按钮点击，向左移动
 /// </summary>
 public void onleftbtnclick(){
  int length = sprites.length;

  gameobject temp=sprites[0];
  for (int i = 0; i < length; i++) {//移动卡片在数组中的位置，依此向前移动一位
   if (i == length - 1)
    sprites [i] = temp;
   else
    sprites [i] = sprites [i + 1];
  }

  for (int i = 0; i < length; i++) {//跟新数组卡片需要显示的位置和层级
   setposition (i);
   setdeeps (i);
  }
 }

 /// <summary>
 /// 右侧按钮点击，向右移动
 /// </summary>
 public void rightbtnclick(){
  int length = sprites.length;

  gameobject temp=sprites[length-1];
  for (int i = length-1; i >=0; i--) {
   if (i == 0)
    sprites [i] = temp;
   else
    sprites [i] = sprites [i - 1];
  }
  for (int i = 0; i < length; i++) {
   setposition (i);
   setdeeps (i);
  }
 }
}

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