Alternate Code for CalculateWorldPointOfMouseClick

DefenderSpawner.cs

/*	DESCRIPTION:
 * 	Spawns defenders on the grid by converting
 * 	mouse position when clicked on screne to world cordinates.
 * 	Rounds the world cordinates to a whole gid number and
 * 	spawns a defender in that location.
 * 
 * 	Collider2D:
 * 	Used for getting OnMouseDown message
*/

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class DefenderSpawner : MonoBehaviour {

	void OnMouseDown(){

		Vector2 rawPos = CalculateWorldPointOfMouseClick ();
		Vector2 roundedPos = SnapToGrid (rawPos);
		Instantiate (DefenderButton.selectedDefender, roundedPos, Quaternion.identity);
		
		// Nested methods to convert and round the mouse click position
		//print (SnapToGrid (CalculateWorldPointOfMouseClick ()) ); 
	}

	Vector2 SnapToGrid(Vector2 rawWorldPos){
		// Rounds the click to the nearest integer
		// Returns Vector2 with newX, newY
		float newX = Mathf.Round (rawWorldPos.x);
		float newY = Mathf.Round (rawWorldPos.y);
		return new Vector2 (newX, newY);
	}

	Vector2 CalculateWorldPointOfMouseClick(){
		// Converts the mousePosition to world cordinates
		// Returns Vector2 (mousePosX, mousePosY)
		Camera camera = GameObject.FindObjectOfType<Camera> ();
		Vector3 mousePos = camera.ScreenToWorldPoint (Input.mousePosition);
		return new Vector2 (mousePos.x, mousePos.y);
	}
}