Smooth draw curve line

![alt text][1]Hello There I made the code for drawing the curve on the PC. The photo below is a photograph of a PC. [1]: /storage/temp/44338-triangle.png The second photo is a picture of the Android. [2]: /storage/temp/44340-tri.png This line is not smooth line segment by creating one triangle in Android. In the PC segment looks like a smooth line looks like two overlapping squares, but triangles And the work by drawing a smooth curve from the current Android. I want to get help. Please Help me. I want to smooth curve line in android.

The Code :

using UnityEngine; using System.Collections; using System.Collections.Generic; public class StrightLine : MonoBehaviour { private LineRenderer line; // Reference to LineRenderer private Vector3 mousePos;
private Vector3 startPos; // Start position of line private Vector3 endPos; // End position of line private List pointList; public GameObject ball; public Shader shader; private bool isMousepressed; private Rigidbody2D ri; void start(){

 }
 void Update () 
 {
     // On mouse down new line will be created 
     if(Input.GetMouseButtonDown(0))
     {
         if(line == null)
             createLine();            
         pointList.RemoveRange(0,pointList.Count);    
         isMousepressed=true;
     }
     else if(Input.GetMouseButtonUp(0))
     {
         if(line)
         {
             line = null;
             isMousepressed=false;
         }
     }
     else if(isMousepressed)
     {
         mousePos = Camera.main.ScreenToWorldPoint(Input.mousePosition);
         mousePos.z = 0;
         if(line)
         {
             pointList.Add (mousePos);
             line.SetVertexCount (pointList.Count);
             line.SetColors(Color.red,Color.red);
             line.SetPosition(pointList.Count - 1, (Vector3)pointList [pointList.Count - 1]);
         }
     }
 }
 // Following method creates line runtime using Line Renderer component
 private void createLine()
 {
     line = new GameObject("Line").AddComponent<LineRenderer>();
     line.material =  new Material(shader);// shader = Particles/Additive
     pointList = new List<Vector3> ();
     line.SetWidth(0.1f,0.1f);    
     line.SetColors(Color.red,Color.green);
 }    

}

Is it perhaps a matter of shaders? Could change the shape of the segment to a rectangle?