Unity 生成多边形最简单的方法-JZTXT

按照正常的思维，先将多边形进行三角剖分，生成网格，再添加碰撞器，去实现业务逻辑

多边形三角化是件麻烦事，还需要考虑多边形的凹凸性，有没有洞等

其实可以反其道而行，先添加碰撞器，通过碰撞器生成mesh，代码比较简单，直接上代码

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class CreateMesh : MonoBehaviour
{
    public Vector2[] points;

    void Start()
    {
        //EdgeColliderTest();
        PolygonColliderTest();
    }

    void PolygonColliderTest()
    {
        PolygonCollider2D poly = gameObject.AddComponent<PolygonCollider2D>();
        poly.points = points;

        Mesh mesh = poly.CreateMesh(true, true);

        MeshFilter mf = gameObject.AddComponent<MeshFilter>();
        mf.mesh = mesh;

        MeshRenderer mr = gameObject.AddComponent<MeshRenderer>();
        mr.material = new Material(Shader.Find("Standard"));
    }

    void EdgeColliderTest()
    {
        EdgeCollider2D edge = gameObject.AddComponent<EdgeCollider2D>();
        edge.points = points;
        edge.edgeRadius = 0.1f;

        Mesh mesh = edge.CreateMesh(true, true);

        MeshFilter mf = gameObject.AddComponent<MeshFilter>();
        mf.mesh = mesh;

        MeshRenderer mr = gameObject.AddComponent<MeshRenderer>();
        mr.material = new Material(Shader.Find("Standard"));
    }
}

多边形效果：