假设您的意思是PolygonCollider2D，并且它总是以正确的顺序得到3分，我想您可以做类似的事情

using System.Linq;

...

[RequireComponent(typeof(MeshRenderer),typeof(MeshFilter),typeof(PolygonCollider2D))]
public class MeshCreator : MonoBehaviour
{
    void Awake ()
    {
        var points = GetComponent<PolygonCollider2D>().points;
        var meshFilter = GetComponent<MeshFilter>();
        var mesh = new Mesh();

        // Just a shorthand for something like 
        //var list = new List<Vector3>();
        //foreach(var p in points)
        //{
        //    list.Add(p);
        //}
        //mesh.vertices = list.ToArray();
        mesh.vertices = points.Select(p -> (Vector3) p).ToArray();

        // Here create two triangles (each 3 vertices)
        // just because I don't know if you have the points in the correct order
        mesh.triangles = new int[]{0,1,2,1};

        meshFilter.mesh = mesh;
    }
}

，然后将此组件放在PolygonCollider2D旁边。然后它将用三角形替换该对象的网格。

您可以预先在MeshRenderer中设置的材料。

要获得此重叠区域，最简单的解决方案是半透明材料。否则，您可能需要特殊的着色器。