Unity中用Mesh生成灰度地图

using UnityEngine;
using UnityEngine.UI;

[RequireComponent(typeof(MeshRenderer))]
[RequireComponent(typeof(MeshFilter))]
public class ImageMap : MonoBehaviour
{
    [SerializeField]
    private Texture2D texture;
    private int width, height;
    private void Start()
    {
        Mesh mesh = new Mesh();
        width = texture.width;
        height = texture.height;

        VertexHelper vh = new VertexHelper();
        for (int i = 0; i < texture.width; i++)
        {
            for (int j = 0; j < texture.height; j++)
            {
                float y = texture.GetPixel(i, j).grayscale;
                vh.AddVert(new Vector3(i, y * 10, j), Color.white, new Vector2((float)i / width, (float)j / height));

                //列 * 总高度 + 本列索引 就是开始位置
                int startIndex = i * height + j;

                if (i < width - 1 && j < height - 1)
                {
                    vh.AddTriangle(startIndex, startIndex + 1, startIndex + height + 1);
                    vh.AddTriangle(startIndex, startIndex + height + 1, startIndex + height);
                }
            }
        }
        vh.FillMesh(mesh);
        GetComponent<MeshFilter>().mesh = mesh;
        GetComponent<MeshRenderer>().material = new Material(Shader.Find("Standard"));
        //GetComponent<MeshRenderer>().material.mainTexture = texture;
    }
}