Slider控制雷达图

实现效果

最开始是简易的雷达图的实现

```csharp
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
using System.Linq;

public class RadarMap : Graphic
{
    public float[] arr;

    public float r;
    public override Texture mainTexture
    {
        get
        {
            if (material != null && material.mainTexture != null)
            {
                return material.mainTexture;
            }

            return s_WhiteTexture;
        }
    }
    protected override void OnPopulateMesh(VertexHelper vh)
    {
        vh.Clear();
        int n = arr.Length;
        //最小的圆3条边
        if (n>=3)
        {
            Rect rect = this.rectTransform.rect;
            r = rect.width < rect.height ? rect.width / 2 : rect.height / 2;
            float ang = 2 * Mathf.PI / n;
            float p = r / arr.Max();
            //圆的顶点
            vh.AddVert(Vector3.zero,color,new Vector2(0.5f,0.5f));

            for (int i = 0; i < n; i++)
            {
                float x = Mathf.Sin(i * ang) * arr[i] ;
                float y = Mathf.Cos(i * ang) * arr[i] ;

                float uvx = (x + r) / (2 * r);
                float uvy = (y + r) / (2 * r);
                vh.AddVert(new Vector3(x,y,0),color,new Vector2(uvx,uvy));

                if (i == 0)
                {
                    vh.AddTriangle(0,n,1);
                }
                else
                {
                    vh.AddTriangle(0,i,i+1);
                }
            }
        }
        
    }
}

然后设置几个Slider  给Slider赋值脚本

```csharp
using System;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;

public class RadarSlider : MonoBehaviour
{
    public Slider[] arr;
    
    public RadarMap map;
    // Start is called before the first frame update
    void Start()
    {在这里插入代码片
        for (int i = 0; i < arr.Length; i++)
        {
            arr[i].maxValue = map.r;
        }
    }
    

    private void Update()
    {
        for (int i = 0; i < arr.Length; i++)
        {
            if (arr[i].value!=0)
            {
                map.arr[i] = arr[i].value;
                map.SetAllDirty();
            }
        }
    }
}