[help] i'm having hard time creating meshes in c#

Hi !
I'm trying to create a circle in c#. (My final goal will be to draw pie graph)
I thought i was doing it right, but here is what i got :



Here is my code so far:

Code (CSharp):

1. using UnityEngine;
2. using System.Collections;
3.  
4. public class PieGraph : MonoBehaviour {
5.  
6.     public int resolution = 36;
7.     float angleStep;
8.     float curAngle=0;
9.  
10.     // Use this for initialization
11.     void Start () {
12.  
13.         MeshFilter mf = GetComponent < MeshFilter>();
14.         Mesh mesh = new Mesh ();
15.         mf.mesh = mesh;
16.  
17.         //Vertices
18.         Vector3 [] vertices = new Vector3[resolution + 1];
19.  
20.         vertices [0] = new Vector3 (0, 0, 0);//centre
21.         angleStep = 360 / resolution;
22.  
23.         for(int i=1;i<=resolution;i++){//NB POINTS
24.             vertices[i]=new Vector3 (Mathf.Cos(curAngle),Mathf.Sin(curAngle), 0);
25.             curAngle+=angleStep;
26.             //Debug.Log (vertices[i]);
27.         }
28.  
29.         //Triangles
30.         int [] triangles = new int[resolution*3];
31.  
32.         int temp = 0;
33.         triangles[0]=0;
34.         for(int i=1;i<(resolution*3);i++){//NB POINTS
35.             if(i%3==0){
36.                 triangles[i]=0;
37.                 temp+=1;
38.             }
39.             else{
40.                 triangles[i]=i-2*temp;
41.                 if(i-2*temp==37)triangles[i]=1;
42.             }
43.         }
44.  
45.         /*
46.         for (int i=0; i<(resolution*3); i++) {//NB POINTS
47.             Debug.Log (i + "  " + triangles [i]);
48.         }
49.         */
50.  
51.         //Normals
52.         Vector3[] normals = new Vector3[resolution+1];
53.  
54.         for(int i=0;i<=resolution;i++){//NB POINTS
55.             normals[i] = Vector3.forward;
56.         }
57.         //UVs
58.         Vector2[] UV= new Vector2 [resolution+1];
59.         for(int i=0;i<=resolution;i++){//NB POINTS
60.             UV[i] = new Vector2(vertices[i].x,vertices[i].y);
61.         }
62.  
63.         //Assign arrays
64.         mesh.vertices = vertices;
65.         mesh.triangles = triangles;
66.         mesh.normals = normals;
67.         mesh.uv = UV;
68.  
69.  
70.    
71.     }
72. }
73.  

When i check my vertices position / my triangles with debug.log , it seems to be right. Here are screens from the console : (those are from the Debug.log you can see in my code)
Vertices coords:

triangles :


Help is required Thx a lot

 

Looks like you're using degrees in Mathf.Sin/Cos. Those functions expect radians.

 

I love you <3

problem solved

 

As general advice for mesh-building, I recommend treating triangles as blocks of 3 (or quads as blocks of 6) rather than trying to do modulus math - it'll make your code a lot more readable and less error-prone.

Something like this (though it may not quite be correct, I had trouble reading what your code was trying to do)

Code (csharp):

1.  
2. for(int i=1;i<resolution;i++){//NB POINTS
3. int t = i*3;
4. triangles[t+0] = 0;
5. triangles[t+1] = i;
6. triangles[t+2] = (i+1) % resolution;
7. }

 

Yeah, my code is clearly not "clean" or optimized, i just needed a first result to keep going now i can go on, thx a lot