marker lines 2

using UnityEngine;
using System.Collections.Generic;

public class MinimapGlLineManager : MonoBehaviour
{
	private List<Transform> icons = new List<Transform>();

	// Choose the Unlit/Color shader in the Material Settings
	// You can change that color, to change the color of the connecting lines
	[SerializeField]
	private Material lineMat;

	public Camera miniMapCamera;

	public MeshRenderer miniMap;

	private List<GameObject> debugObjects = new List<GameObject>();

	[SerializeField]
	private float heightAboveMap = 0.05f;


	void Awake()
	{

	}

	public void RegisterIcon(Transform icon)
	{
		icons.Add(icon);
		GameObject dot = GameObject.CreatePrimitive(PrimitiveType.Sphere);
		dot.transform.localScale = Vector3.one * 0.1f;
		dot.GetComponent<MeshRenderer>().sharedMaterial = lineMat;
		debugObjects.Add(dot);
	}

	public void DeregisterIcon(Transform icon)
	{
		if (icons.Contains(icon))
			icons.Remove(icon);
		else
		{
			Debug.LogError("icon not found in list. Cannot deregister: " + icon.gameObject.name);
		}
	}

	void DrawConnectingLines(Vector3 go1, Vector3 go2)
	{
		GL.Begin(GL.LINES);
		lineMat.SetPass(0);
		GL.Color(new Color(lineMat.color.r, lineMat.color.g, lineMat.color.b, lineMat.color.a));
		GL.Vertex3(go1.x, go1.y, go1.z);
		GL.Vertex3(go2.x, go2.y, go2.z);
		GL.End();
	}

	private Vector3 GetPointOnMiniMap(Vector3 iconWorldsPosition)
	{
		// Get screen point
		Vector3 screenPoint = miniMapCamera.WorldToScreenPoint(iconWorldsPosition);

		// Convert that to a % of the screen (0,0 in lower left)
		Vector2 screenPointPercent = new Vector2(
			screenPoint.x / miniMapCamera.pixelWidth,
			screenPoint.y / miniMapCamera.pixelHeight);

		// thank god the minimap is planar
		// get point on minimap via size of the mesh renderer
		Vector3 lowerLeft = miniMap.bounds.min;
		Vector3 miniMapPoint = new Vector3(
			lowerLeft.x + miniMap.bounds.size.x * screenPointPercent.x,
			miniMap.transform.position.y + heightAboveMap,
			lowerLeft.z + miniMap.bounds.size.z * screenPointPercent.y);

		return miniMapPoint;
	}

	private bool doOnce;

	private void OnPostRender()
	{
		for (int i = 0; i < icons.Count; i++)
		{
			if (icons[i] == null)
				continue;

			DrawConnectingLines(
				icons[i].transform.position,
				GetPointOnMiniMap(icons[i].transform.position));

			debugObjects[i].transform.position = GetPointOnMiniMap(icons[i].transform.position);

			if (!doOnce)
			{
				doOnce = true;
				Debug.LogFormat(
					"Draw line from: {0} to {1}",
					icons[i].transform.position,
					GetPointOnMiniMap(icons[i].transform.position));
			}
		}
	}
}