1 using UnityEngine;
 2 using System.Collections;
 3 
 4 public class dyn3d : MonoBehaviour {
 5 
 6     // Use this for initialization
 7     void Start () {
 8     
 9         CreateCube();
10     }
11     
12     // Update is called once per frame
13     void Update () {
14 
15     }
16 
17     void CreateCube()
18     {
19 
20         GameObject obj=new GameObject("cube");
21         MeshFilter mf=obj.AddComponent<MeshFilter>();
22         MeshRenderer mr=obj.AddComponent<MeshRenderer>();
23         
24         
25         Vector3[] vertices=new Vector3[24];
26         int[] triangles=new int[36];
27 
28         //forward
29         vertices[0].Set(0.5f,-0.5f,0.5f);
30         vertices[1].Set(-0.5f,-0.5f,0.5f);
31         vertices[2].Set(0.5f,0.5f,0.5f);
32         vertices[3].Set(-0.5f,0.5f,0.5f);
33         //back
34         vertices[4].Set(vertices[2].x,vertices[2].y,-0.5f);
35         vertices[5].Set(vertices[3].x,vertices[3].y,-0.5f);
36         vertices[6].Set(vertices[0].x,vertices[0].y,-0.5f);
37         vertices[7].Set(vertices[1].x,vertices[1].y,-0.5f);
38         //up
39         vertices[8]=vertices[2];
40         vertices[9]=vertices[3];
41         vertices[10]=vertices[4];
42         vertices[11]=vertices[5];
43         //down
44         vertices[12].Set(vertices[10].x,-0.5f,vertices[10].z);
45         vertices[13].Set(vertices[11].x,-0.5f,vertices[11].z);
46         vertices[14].Set(vertices[8].x,-0.5f,vertices[8].z);
47         vertices[15].Set(vertices[9].x,-0.5f,vertices[9].z);
48         //right
49         vertices[16]=vertices[6];
50         vertices[17]=vertices[0];
51         vertices[18]=vertices[4];
52         vertices[19]=vertices[2];
53         //left
54         vertices[20].Set(-0.5f,vertices[18].y,vertices[18].z);
55         vertices[21].Set(-0.5f,vertices[19].y,vertices[19].z);
56         vertices[22].Set(-0.5f,vertices[16].y,vertices[16].z);
57         vertices[23].Set(-0.5f,vertices[17].y,vertices[17].z);
58         
59         int currentCount=0;
60         for(int i=0;i<24;i=i+4)
61         {
62             triangles[currentCount++]=i;
63             triangles[currentCount++]=i+3;
64             triangles[currentCount++]=i+1;
65             
66             triangles[currentCount++]=i;
67             triangles[currentCount++]=i+2;
68             triangles[currentCount++]=i+3;
69             
70         }
71 
72         mf.mesh.vertices=vertices;
73         mf.mesh.triangles=triangles;
74         
75     }
76 }

 1 int currentCount=0;
 2 for(int i=0;i<24;i=i+4)
 3 {
 4         //三角形1
 5     triangles[currentCount++]=i;
 6     triangles[currentCount++]=i+3;
 7     triangles[currentCount++]=i+1;
 8     //三角形2        
 9     triangles[currentCount++]=i;
10     triangles[currentCount++]=i+2;
11     triangles[currentCount++]=i+3;
12 }