using UnityEngine;
using System.Collections;public class SimpleSprite : MonoBehaviour {//标准摄像头的高度//public float standardCameraSize;//标准屏幕的高度//public float standardHeight;private float glTopixelRatio;//素材求//public Material spriteMaterial;//顶点数//private int verticesCount = 4;// Use this for initializationvoid Start () {//计算像素和世界单位的比值//glTopixelRatio = standardCameraSize * 2.0f / standardHeight;initSprite();}// Update is called once per framevoid Update () {}//根据宽高生成对应的面//private void initSprite(){//获取图片的像素宽高//int pixelHeight = spriteMaterial.mainTexture.height;int pixelWidth = spriteMaterial.mainTexture.width;Debug.Log("pixeW:" + pixelWidth + ",pixeH:" + pixelHeight);//得到MeshFilter对象//MeshFilter meshFilter = gameObject.GetComponent<MeshFilter>();if(meshFilter == null){//为null时，自动添加//meshFilter = gameObject.AddComponent<MeshFilter>();MeshRenderer meshRenderer = gameObject.AddComponent<MeshRenderer>();meshRenderer.sharedMaterial = spriteMaterial;}//得到对应的网格对象//Mesh mesh = meshFilter.mesh;//三角形顶点的坐标数组//Vector3[] vertices = new Vector3[verticesCount];//得到三角形的数量//int trianglesCount = verticesCount - 2;//三角形顶点数组//int[] triangles   = new int[verticesCount *3];float glWidth = pixelWidth * glTopixelRatio;float glHeight = pixelHeight * glTopixelRatio;//以当前对象的中心坐标为标准//vertices[0] = new Vector3(0, 0, 0);vertices[1] = new Vector3(0, glHeight, 0);vertices[2] = new Vector3(glWidth, 0, 0);vertices[3] = new Vector3(glWidth, glHeight, 0);mesh.vertices = vertices;//绑定顶点顺序//triangles[0] = 0;triangles[1] = 1;triangles[2] = 2;triangles[3] = 1;triangles[4] = 3;triangles[5] = 2;      mesh.triangles = triangles;mesh.uv = new Vector2[]{new Vector2(0,0), new Vector2(0,1), new Vector2(1,0), new Vector2(1,1)};}  }