GL and texture coordinates

Hello everyone! How to draw with gl triangles with certain texture coordinates?
When I use this code, a circle texture looks like stripes, but I expected this will become tiled circles without any distortion. Thanks in advance!

Code (csharp):

1.  
2. usingUnityEngine;
3.  
4. [ExecuteInEditMode]
5. publicclass GlUvTest:MonoBehaviour
6. {
7.    public Material mat;
8.  
9.    void Update()
10.    {
11.        transform.position=new Vector3(0, 5.621685f, -8.10467f);
12.    }
13.  
14.    void OnPostRender()
15.    {
16.        if(mat==null)
17.             return;
18.  
19.         mat.SetPass(0);
20.        
21.         GL.Begin(GL.TRIANGLES);
22.         GL.Color(Color.white);
23.  
24.  
25.         GL.Vertex3(0, 1, 0);
26.         GL.TexCoord2(0, 1);
27.  
28.         GL.Vertex3(0.5f, 10f, 0);
29.         GL.TexCoord2(0.5f, 10);
30.  
31.         GL.Vertex3(1, 1, 0);
32.         GL.TexCoord2(1, 1);
33.  
34.         GL.End();
35.    }
36. }
37.  
38.  

 

No one knows?