生成一个QuadMesh并保存

Mono_CreateQuadAssets.cs

using Sirenix.OdinInspector;
using UnityEditor;
using UnityEngine;

namespace Code.EditorTools.CreateMesh
{
    public class Mono_CreateQuadAssets : MonoBehaviour
    {
        public Transform left_bottom; //0
        public Transform left_top; //1
        public Transform right_bottom; //2
        public Transform right_top; //3

        [Button("生成", ButtonSizes.Large)]
        private void CreateQuad()
        {
            var mesh = new Mesh();

            var vertices = new[] {left_bottom.position, left_top.position, right_bottom.position, right_top.position};
            var tris = new[]
            {
                // lower left triangle
                0, 1, 3,
                // upper right triangle
                0, 3, 2
            };
            var normals = new[]
            {
                -Vector3.forward,
                -Vector3.forward,
                -Vector3.forward,
                -Vector3.forward
            };

            var uv = new Vector2[]
            {
                new(0, 0),
                new(1, 0),
                new(0, 1),
                new(1, 1)
            };

            mesh.vertices = vertices;
            mesh.triangles = tris;
            mesh.uv = uv;
            mesh.normals = normals;

            var path = EditorUtility.SaveFilePanel("Save Mesh Asset", "Assets/", "Mesh_Quad", "asset");
            if (string.IsNullOrEmpty(path)) return;

            path = FileUtil.GetProjectRelativePath(path);

            AssetDatabase.CreateAsset(mesh, path);
            AssetDatabase.SaveAssets();
            AssetDatabase.Refresh();
        }
    }
}