Seyed Morteza Kamali smkplus

https://gamedevelopment.tutsplus.com/tutorials/positioning-on-screen-indicators-to-point-to-off-screen-targets--gamedev-6644

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class ScreenIndicator : MonoBehaviour {
    public Transform targetPosOnScreen;
 public Transform Indicator;

http://www.vcskicks.com/regular-polygon.php

private Vector3[] CalculateVertices(int sides, int radius, int startingAngle, Vector3 center)
{
    if (sides < 3)
        throw new ArgumentException("Polygon must have 3 sides or more.");

    List<Vector3> points = new List<Vector3>();
 float step = 360.0f / sides;

https://forum.unity.com/threads/accessing-depth-buffer-from-a-surface-shader.404380/

https://gamedev.stackexchange.com/questions/158243/surface-depth-intersection-shader#

Surface Shader:

Shader "Intersection/SimpleSurface" {
    Properties {
        _Color ("Color", Color) = (1,1,1,1)
 _MainTex ("Albedo (RGB)", 2D) = "white" {}

	// Because this framework is supposed to work with the legacy render pipelines AND scriptable render
	// pipelines we can't use Unity's shader libraries (some scriptable pipelines come with their own
	// shader lib). So here goes a minimal shader lib only used for post-processing to ensure good
	// compatibility with all pipelines.

	#ifndef UNITY_POSTFX_STDLIB
	#define UNITY_POSTFX_STDLIB

	// -----------------------------------------------------------------------------
	// API macros

	````
	using System.Collections;
	using System.Collections.Generic;
	using UnityEngine;
	using UnityEngine.UI;
	public class CountDown : MonoBehaviour {
	public Text timerText;
	public int timer;
	void Start ()
	{

	private void OnDrawGizmos() {
	Gizmos.color = Color.yellow;
	float theta = 0;
	float Radius = transform.localScale.magnitude;
	float x = Radius*Mathf.Cos(theta);
	float y = Radius*Mathf.Sin(theta);
	Vector3 pos = transform.position+new Vector3(x,0,y);
	Vector3 newPos = pos;
	Vector3 lastPos = pos;
	for(theta = 0.1f;theta<Mathf.PI*2;theta+=0.1f){

	````
	void vert (inout appdata_full v, out Input o){
	UNITY_INITIALIZE_OUTPUT(Input,o);
	}
	````

	//https://www.shadertoy.com/view/XtBXDt
	Shader "Hidden/Shader"
	{
	Properties
	{
	_MainTex ("Texture", 2D) = "white" {}
	}
	SubShader
	{
	// No culling or depth



	Shader error in 'Example': Too many texture interpolators would be used for ForwardBase pass (11 out of max 10) at line 9

	solution: use #pragma target 3.5 or greater

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