using UnityEngine;
using System.Collections;
using UnityEditor;
using System.Collections.Generic;
using System.Linq;
public class Fov : MonoBehaviour {
// Use this for initialization
public float minRange = 0;
public float maxRange = 100;
public float rightAngle = 45;
public float leftAngle = 45;
public float UpAngle = 45;
public float DownAngle = 45;
public bool Fov_look = false;
public Color Fov_color = new Color(0, 1, 0,0.04f);
public Transform[] target;
public Dictionary<Transform, float> rank = new Dictionary<Transform, float>();
private Transform get;
void Start () {
}
// Update is called once per frame
void Update () {
InFov();
}
//搜索敌人列表，看有没有敌人在视野范围内
void InFov() {
foreach (Transform i in target) {
float distance = (i.position - transform.position).magnitude;
if (distance >= minRange && distance <= maxRange) {
if (!rank.ContainsKey(i))
{
rank.Add(i, distance);
}
else
{
rank[i] = distance;
}
}
}
get_rank();
}
//选择最近的一个
void get_rank()
{
List<float> list_distance = new List<float>();
List<Transform> list_obj = new List<Transform>();
float b=0;
if (rank.Count>0)
{
foreach (Transform tra1 in rank.Keys)
{
list_distance.Add(rank[tra1]);
}
b = list_distance.Min();
foreach (Transform tra2 in rank.Keys)
{
if (rank[tra2] == b)
{
list_obj.Add(tra2);
}
}
get = list_obj[0];
Debug.Log("get is " + get + "...distance is " + b);
}
}
void OnDrawGizmos() {
if (Fov_look) DrawFov();
}
void DrawFov() {
Handles.color = Fov_color;
//绘制扇形视野范围，第一个参数圆的中心点，第二参数圆的法线方向，第三个参数扇形开始点，第四个参数扇形的弧度，第五个参数扇形半径
Handles.DrawSolidArc(transform.position, transform.up, transform.forward, -leftAngle, maxRange);
Handles.DrawSolidArc(transform.position, transform.up, transform.forward, rightAngle, maxRange);
Handles.DrawSolidArc(transform.position, transform.right, transform.forward, -UpAngle, maxRange);
Handles.DrawSolidArc(transform.position, transform.right, transform.forward, DownAngle, maxRange);
Handles.color = new Color(1, 0, 0, Fov_color.a);
Handles.DrawSolidArc(transform.position, transform.up, transform.forward, -leftAngle, minRange);
Handles.DrawSolidArc(transform.position, transform.up, transform.forward, rightAngle, minRange);
Handles.DrawSolidArc(transform.position, transform.right, transform.forward, -UpAngle, minRange);
Handles.DrawSolidArc(transform.position, transform.right, transform.forward, DownAngle, minRange);
//绘制扇形的弧线，第一个参数圆的中心点，第二个参数圆的法线，第三个参数弧线起始点，第四个参数弧度，第五个参数圆弧半径
Handles.color = new Color(Fov_color.r, Fov_color.g, Fov_color.b);
Handles.DrawWireArc(transform.position, transform.up, transform.forward, -leftAngle, maxRange);
Handles.DrawWireArc(transform.position, transform.up, transform.forward, rightAngle, maxRange);
Handles.DrawWireArc(transform.position, transform.right, transform.forward, -UpAngle, maxRange);
Handles.DrawWireArc(transform.position, transform.right, transform.forward, DownAngle, maxRange);
Handles.DrawWireArc(transform.position, transform.up, transform.forward, -leftAngle, minRange);
Handles.DrawWireArc(transform.position, transform.up, transform.forward, rightAngle, minRange);
Handles.DrawWireArc(transform.position, transform.right, transform.forward, -UpAngle, minRange);
Handles.DrawWireArc(transform.position, transform.right, transform.forward, DownAngle, minRange);
}
}
注：在list中了解了一个比较有趣的现象list！=null 和list.Count()>0，这是两个不同的含义，第一个list！=null是判断list存不存在，而第二个list.Count()>0是判断list有没有元素，我开始写错了，导致list.Min()不能正常使用，这点应该记住
