public static void DrawLine(Vector2 pointA, Vector2 pointB, Color color)
{
    if (Canvas.lineMaterial == null)
    {
        Canvas.lineMaterial = new Material("Shader \"Lines/Colored Blended\" {SubShader { Pass {   BindChannels { Bind \"Color\",color }   Blend SrcAlpha OneMinusSrcAlpha   ZWrite Off Cull Off Fog { Mode Off }} } }");
        Canvas.lineMaterial.set_hideFlags(13);
        Canvas.lineMaterial.get_shader().set_hideFlags(13);
    }
    Canvas.lineMaterial.SetPass(0);
    GL.Begin(1);
    GL.Color(color);
    GL.Vertex3(pointA.x, pointA.y, 0f);
    GL.Vertex3(pointB.x, pointB.y, 0f);
    GL.End();
}