Change Materials Element 0 of Mesh Renderer to a selected image as a shader.

As Unity does not provide triangle object, I need to create it by C#.

After adding Mesh Filter and Mesh Renderer by C#, the object cannot add such components again in scene.

I can only change the color of object created.

Now, I need to change Materials Element 0 of Mesh Renderer to a selected image as a shader.

I have tried Resources.Load () and Shader.Find () but they don't work.

How can I do it in C#? Please explain with code.

Here is my code triangle.cs

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4.  
5. public class triangle : MonoBehaviour {
6.     public Vector3 center;
7.     public float x1, y1, x2, y2, radius;
8.     public string color;
9.  
10.     // Use this for initialization
11.     void Start () {
12.         gameObject.AddComponent<MeshFilter>();
13.         gameObject.AddComponent<MeshRenderer>();
14.         Mesh mesh = GetComponent<MeshFilter>().mesh;
15.         Material mat = GetComponent<Renderer>().material;
16.         SphereCollider sc = gameObject.AddComponent(typeof(SphereCollider)) as SphereCollider;
17.         sc.center = center;
18.         sc.radius = radius;
19.         mesh.Clear();
20.  
21.         // make changes to the Mesh by creating arrays which contain the new values
22.         mesh.vertices = new Vector3[] {new Vector3(0, 0, 0), new Vector3(x1, y1, 0), new Vector3(x2, y2, 0)};
23.         mesh.uv = new Vector2[] {new Vector2(0, 0), new Vector2(0, 1), new Vector2(1, 1)};
24.         mesh.triangles =  new int[] {0, 1, 2};
25.         switch (color) {
26.             case "black": mat.color = new Color (0, 0, 0, 1);  break;
27.             case "blue": mat.color = new Color (0, 0, 255, 1);  break;
28.             case "clear": mat.color = new Color (0, 0, 0, 0);  break;
29.             case "cyan": mat.color = new Color (0, 255, 255, 1);  break;
30.             case "green": mat.color = new Color (0, 255, 0, 1);  break;
31.             case "magenta": mat.color = new Color (255, 0, 255, 1);  break;
32.             case "purple": mat.color = new Color (1, 0, 1, 1);  break;
33.             case "red": mat.color = new Color (255, 0, 0, 1);  break;
34.             case "white": mat.color = new Color (255, 255, 255, 1);  break;
35.             case "yellow": mat.color = new Color (255, 255, 0, 1);  break;
36.         }
37.     }
38.  
39.     // Update is called once per frame
40.     void Update () {
41.      
42.     }
43. }

 

Please review Using code tags properly