using UnityEngine; using UnityEngine.UI; public class AreaCheck : MonoBehaviour { //"AreaCheck"类名 ，需要和外部脚本名称保持一致 public Material Green_Mate; //申请材质变量储存绿色的材质 public Material Red_Mate; //申请材质变量储存红色材质 public Material Tran_Mate; //申请材质变量储存透明材质 private CanvasScaler CanS; //申请变脸储存UI屏幕自适度的缩放组件 private float X_Sc; //申请浮点型类型的变量储存实际的缩放比例 //记录扫描框的范围 private Vector2 TopLeft_UI; //记录扫描框左上角的坐标 //“private”申请类型为私有 private Vector2 BottomLeft_UI; //记录扫描框左下角的坐标 private Vector2 TopRight_UI; //记录扫描框右上角的坐标 private Vector2 BottomRight_UI; //记录扫描框右下角的坐标 //记录面片的世界坐标 private Vector3 TopLeft_Pl_W; //记录面片左上角的世界坐标 private Vector3 BottomLeft_Pl_W; //记录面片左下角的世界坐标 private Vector3 TopRight_Pl_W; //记录面片右上角的世界坐标 private Vector3 BottomRight_Pl_W; //记录面片右下角的世界坐标 //记录面片的屏幕坐标 private Vector2 TopLeft_Pl_Sc; //记录面片左上角的屏幕坐标 private Vector2 BottomLeft_Pl_Sc; //记录面片坐下角的屏幕坐标 private Vector2 TopRight_Pl_Sc; //记录面片右上角的屏幕坐标 private Vector2 BottomRight_Pl_Sc; //记录面片右下角的屏幕坐标 private Vector2 PlaneWH; //记录面片的宽高 //脚本刚开始运行的时候调用一次 // Use this for initialization void Start () { CanS = GameObject.Find ("Canvas").gameObject.GetComponent<CanvasScaler> (); //获取控制屏幕自适度的组件 X_Sc = Screen.width / CanS.referenceResolution.x; //获取实际的缩放比例 } //每一帧都调用 // Update is called once per frame void Update () { //计算了扫描框四个点的坐标位置，“*X_Sc"是屏幕自适度的缩放比例，这样才能获取真正运行时UI图片的宽高 //TopLeft_UI = new Vector2 (Screen.width-400*X_Sc,Screen.height+300*X_Sc)*0.5f; TopLeft_UI = new Vector2(0,1080 * X_Sc); //给扫描框左上角的坐标赋值 //"Screen.width-400,Screen.height+300" 屏幕的宽度减去扫描框的宽度，屏幕的高度减去扫描框的高度 //BottomLeft_UI =new Vector2(Screen.width-400*X_Sc,Screen.height-300*X_Sc)*0.5f; BottomLeft_UI = new Vector2(0, 0); //给扫描框左下角的坐标赋值 //TopRight_UI =new Vector2(Screen.width+400*X_Sc,Screen.height+300*X_Sc)*0.5f; TopRight_UI = new Vector2(1920 * X_Sc, 1080 * X_Sc); //给扫描框右上角的坐标赋值 //BottomRight_UI =new Vector2(Screen.width+400*X_Sc,Screen.height-300*X_Sc)*0.5f; BottomRight_UI = new Vector2(1920 * X_Sc, 0); //给扫描框右下角的坐标赋值 PlaneWH = new Vector2 (gameObject.GetComponent<MeshFilter>().mesh.bounds.size.x,gameObject.GetComponent<MeshFilter>().mesh.bounds.size.z)*0.5f * 0.1f; //0.1f=ImageTarget.scale*PlaneInScreen.scale //获取面片的宽高的一半 //"gameObject.GetComponent<MeshFilter>().mesh.bounds.size.x"获取面片X方向的宽度 //"*5"是因为开始获取到的长宽是模型本身的长宽，而场景中我们有缩放因素，父级物体放大了50倍，自身缩小到了0.1，因此获取实际宽高需要再乘以5 //获取面片四个点的世界坐标 TopLeft_Pl_W = gameObject.transform.parent.position + new Vector3 (-PlaneWH.x,0,PlaneWH.y); //获取面片左上角的世界坐标 //"gameObject.transform.parent.position"物体的父级物体的世界坐标 //"new Vector2 (-PlaneWH.x,PlaneWH.y)"向左上方偏移的量 BottomLeft_Pl_W = gameObject.transform.parent.position + new Vector3 (-PlaneWH.x,0,-PlaneWH.y); //获取面片左下角的世界坐标 TopRight_Pl_W = gameObject.transform.parent.position + new Vector3 (PlaneWH.x,0,PlaneWH.y); //获取面片右上角的世界坐标 BottomRight_Pl_W = gameObject.transform.parent.position + new Vector3 (PlaneWH.x,0,-PlaneWH.y); //获取面片右下角的世界坐标 //获取面片的屏幕坐标 TopLeft_Pl_Sc=Camera.main.WorldToScreenPoint(TopLeft_Pl_W); //获取面片左上角的屏幕坐标 //Camera.main.WorldToScreenPoint(Vector3()); 将世界坐标转化为屏幕坐标 BottomLeft_Pl_Sc=Camera.main.WorldToScreenPoint(BottomLeft_Pl_W ); //获取面片左下角的屏幕坐标 TopRight_Pl_Sc=Camera.main.WorldToScreenPoint(TopRight_Pl_W); //获取面片右上角的屏幕坐标 BottomRight_Pl_Sc=Camera.main.WorldToScreenPoint(BottomRight_Pl_W ); //获取面片右下角的屏幕坐标 //判断面片是否在扫描框范围内 if(TopLeft_Pl_Sc.x>TopLeft_UI.x&&TopLeft_Pl_Sc.y<TopLeft_UI.y&&BottomLeft_Pl_Sc.x>BottomLeft_UI.x&&BottomLeft_Pl_Sc.y>BottomLeft_UI.y&&TopRight_Pl_Sc.x<TopRight_UI.x&&TopRight_Pl_Sc.y<TopLeft_UI.y&&BottomRight_Pl_Sc.x<BottomRight_UI.x&&BottomRight_Pl_Sc.y>BottomRight_UI.y){ //当面片完全处于扫描框范围内时 执行以下代码 gameObject.GetComponent<Renderer>().material=Green_Mate; //将脚本所附着的物体（面片）的材质变为绿色材质 }else{ //当面片并非完全处于扫描框范围内时 执行以下代码 gameObject.GetComponent<Renderer>().material=Red_Mate; //将脚本所附着的物体（面片）的材质变为红色材质 } } }
工程设置
