Unity绘制与UGUI绘制、UGUI的底层绘制原理

一、Ugui是用CanvasRenderer提供绘制的

            canvasRenderer.materialCount = 1;

            canvasRenderer.SetMaterial(materialForRendering, 0);

            canvasRenderer.SetTexture(mainTexture);

            canvasRenderer.SetMesh(workerMesh);

二、Unity的绘制3D物体的绘制是用MeshRenderer进行的

     MeshFilter.sharedMesh = mesh;

     MeshRenderer.sharedMaterial = new Material (shader);

下面使用例子 依次介绍绘制原理

一、Unity的绘制

编写脚本：

using UnityEngine;

using System.Collections;

public class UnityDraw : MonoBehaviour

{

    void Start()

    {

        Vector3[] vertices = new Vector3[4];

        vertices[0] = new Vector3(0, 0, 0);

        vertices[1] = new Vector3(0, 0, 1);

        vertices[2] = new Vector3(1, 0, 1);

        vertices[3] = new Vector3(1, 0, 0);

        int[] triangles = new int[6];

        triangles[0] = 0;

        triangles[1] = 1;

        triangles[2] = 2;

        triangles[3] = 2;

        triangles[4] = 3;

        triangles[5] = 0;

      &