Unity 网格画图形

鹅肉网格画图形就是画三角形

画一个正方形

建一个空物体加一些组件Mesh Filter,Mesh Renderer.

 找到对应顶点(AddVert添加顶点)，就可以绘制了（顶点是可以变得），我就绘制了正面。（顺指针绘制可以看到正面，逆时针看到后面，想要正反都看到，就正反都绘制）

1.  
   using System.Collections;
2.  
   using System.Collections.Generic;
3.  
   using UnityEngine;
4.  
   using UnityEngine.UI;
5.  
    
6.  
   public class Creatsquare : MonoBehaviour
7.  
   {
8.  
   // Start is called before the first frame update
9.  
   void Start()
10.  
    {
11.  
    Mesh mesh = new Mesh();
12.  
    VertexHelper vh = new VertexHelper();
13.  
     
14.  
    vh.AddVert(new Vector3(0, 0, 0), Color.white, new Vector2(0, 0));
15.  
    vh.AddVert(new Vector3(0, 1, 0), Color.white, new Vector2(0, 1));
16.  
    vh.AddVert(new Vector3(1, 0, 0), Color.white, new Vector2(1, 0));
17.  
    vh.AddVert(new Vector3(1, 1, 0), Color.white, new Vector2(1, 1));
18.  
     
19.  
    vh.AddTriangle(0, 1, 3);
20.  
    vh.AddTriangle(0, 3, 2);
21.  
     
22.  
    vh.FillMesh(mesh);
23.  
    GetComponent<MeshFilter>().mesh = mesh;
24.  
     
25.  
    }
26.  
     
27.  
    // Update is called once per frame
28.  
    void Update()
29.  
    {
30.  
     
31.  
    }
32.  
    }

运行后

然后画正方体

想要看到下面就要逆着画

1.  
   using System.Collections;
2.  
   using System.Collections.Generic;
3.  
   using UnityEngine;
4.  
   using UnityEngine.UI;
5.  
    
6.  
   public class Creatcube : MonoBehaviour
7.  
   {
8.  
   // Start is called before the first frame update
9.  
   void Start()
10.  
    {
11.  
    Mesh mesh = new Mesh();
12.  
    VertexHelper vh = new VertexHelper();
13.  
    //正面
14.  
    vh.AddVert(new Vector3(0, 0, 0), Color.white, new Vector2(0, 0));
15.  
    vh.AddVert(new Vector3(0, 1, 0), Color.white, new Vector2(1, 0));
16.  
    vh.AddVert(new Vector3(1, 1, 0), Color.white, new Vector2(1, 1));
17.  
    vh.AddVert(new Vector3(1, 0, 0), Color.white, new Vector2(0, 1));
18.  
    //右面
19.  
    vh.AddVert(new Vector3(1, 0, 0), Color.white, new Vector2(0, 0));
20.  
    vh.AddVert(new Vector3(1, 1, 0), Color.white, new Vector2(1, 0));
21.  
    vh.AddVert(new Vector3(1, 1, 1), Color.white, new Vector2(1, 1));
22.  
    vh.AddVert(new Vector3(1, 0, 1), Color.white, new Vector2(0, 1));
23.  
    //后面
24.  
    vh.AddVert(new Vector3(1, 0, 1), Color.white, new Vector2(0, 0));
25.  
    vh.AddVert(new Vector3(1, 1, 1), Color.white, new Vector2(1, 0));
26.  
    vh.AddVert(new Vector3(0, 1, 1), Color.white, new Vector2(1, 1));
27.  
    vh.AddVert(new Vector3(0, 0, 1), Color.white, new Vector2(0, 1));
28.  
    //左面
29.  
    vh.AddVert(new Vector3(0, 0, 1), Color.white, new Vector2(0, 0));
30.  
    vh.AddVert(new Vector3(0, 1, 1), Color.white, new Vector2(1, 0));
31.  
    vh.AddVert(new Vector3(0, 1, 0), Color.white, new Vector2(1, 1));
32.  
    vh.AddVert(new Vector3(0, 0, 0), Color.white, new Vector2(0, 1));
33.  
    //上面
34.  
    vh.AddVert(new Vector3(0, 1, 0), Color.white, new Vector2(0, 0));
35.  
    vh.AddVert(new Vector3(0, 1, 1), Color.white, new Vector2(1, 0));
36.  
    vh.AddVert(new Vector3(1, 1, 1), Color.white, new Vector2(1, 1));
37.  
    vh.AddVert(new Vector3(1, 1, 0), Color.white, new Vector2(0, 1));
38.  
    //下面
39.  
    vh.AddVert(new Vector3(0, 0, 0), Color.white, new Vector2(0, 0));
40.  
    vh.AddVert(new Vector3(0, 0, 1), Color.white, new Vector2(1, 0));
41.  
    vh.AddVert(new Vector3(1, 0, 1), Color.white, new Vector2(1, 1));
42.  
    vh.AddVert(new Vector3(1, 0, 0), Color.white, new Vector2(0, 1));
43.  
    //正面
44.  
    vh.AddTriangle(0, 1, 2);
45.  
    vh.AddTriangle(0, 2, 3);
46.  
    //右面
47.  
    vh.AddTriangle(4, 5, 6);
48.  
    vh.AddTriangle(4, 6, 7);
49.  
    //后面
50.  
    vh.AddTriangle(8,9,10);
51.  
    vh.AddTriangle(8,10,11);
52.  
    //左面
53.  
    vh.AddTriangle(12,13,14);
54.  
    vh.AddTriangle(12,14,15);
55.  
    //上面
56.  
    vh.AddTriangle(16, 17, 18);
57.  
    vh.AddTriangle(16, 18, 19);
58.  
    //下面
59.  
    vh.AddTriangle(20, 23, 22);
60.  
    vh.AddTriangle(20, 22, 21);
61.  
     
62.  
    vh.FillMesh(mesh);
63.  
    GetComponent<MeshFilter>().mesh = mesh;
64.  
    }
65.  
     
66.  
    // Update is called once per frame
67.  
    void Update()
68.  
    {
69.  
     
70.  
    }
71.  
    }

最后画个圆

找到对应三角形顶点

找到渲染图片位置 

1.  
   using System.Collections;
2.  
   using System.Collections.Generic;
3.  
   using UnityEngine;
4.  
   using UnityEngine.UI;
5.  
    
6.  
   public class Creatcircle : MonoBehaviour
7.  
   {
8.  
   int num = 100;//三角形个数
9.  
   int r = 1;//半径
10.  
    // Start is called before the first frame update
11.  
    void Start()
12.  
    {
13.  
    Mesh mesh = new Mesh();
14.  
    VertexHelper vh = new VertexHelper();
15.  
     
16.  
    //圆
17.  
    float ang = (2 * Mathf.PI) / num;//弧度
18.  
    vh.AddVert(new Vector3(0, 0, 0), Color.red, new Vector2(0.5f, 0.5f));//原点
19.  
    for (int i = 0; i < num; i )
20.  
    {
21.  
    float x = Mathf.Sin(ang * i) * r;
22.  
    float y = Mathf.Cos(ang * i) * r;
23.  
    float uvx = (x r) / (2 * r);
24.  
    float uvy = (y r) / (2 * r);
25.  
    vh.AddVert(new Vector3(x, y, 0), Color.red, new Vector2(uvx, uvy));
26.  
    if (i == 0)
27.  
    {
28.  
    vh.AddTriangle(0, num, 1);
29.  
    }
30.  
    else
31.  
    {
32.  
    vh.AddTriangle(0, i, i 1);
33.  
    }
34.  
    }
35.  
     
36.  
    vh.FillMesh(mesh);
37.  
    GetComponent<MeshFilter>().mesh = mesh;
38.  
    }
39.  
     
40.  
    // Update is called once per frame
41.  
    void Update()
42.  
    {
43.  
     
44.  
    }
45.  
    }

这篇好文章是转载于：学新通技术网