In the next 2 videos I’ll cover how to lock Ms. Pac-Man perfectly inside of the maze as she moves around. We will do this not through colliders, but instead by using pivot points, which will make the movement very clean and also resource light. We’ll cover how to Setup Pivot Points, Putting GameObjects in an Array, Selecting GameObjects in Code, Cycling through GameObjects in Empties, Moving Ms. Pac-Man, Animating Ms. Pac-Man and much more.

The images are here and the code follows the video below.

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Gameboard.cs

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

public class Gameboard : MonoBehaviour {

	// Create array that holds all TurningPoints
	public Transform[,] gBPoints = new Transform[27,30];

	// References the empty that contains all the points
	private GameObject turningPoints;

	// Use this for initialization
	void Start () {

		// Get the Empty named TurningPoints
		turningPoints = GameObject.Find("TurningPoints");

		// Cycle through each point in that empty
		foreach (Transform point in turningPoints.transform) {

			// Get vector position of point
			Vector2 pos = point.position;

			// Put point in the array
			gBPoints[(int)pos.x, (int)pos.y] = point;

		}
	}
	

}

TurningPoint.cs

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

public class TurningPoint : MonoBehaviour {

	public TurningPoint[] nextPoints;
	public Vector2[] vectToNextPoint;

	// Use this for initialization
	void Start () {

		// Initialize the array that will hold the vector to
		// each nearby TurningPoint
		vectToNextPoint = new Vector2[nextPoints.Length];

		for (int i = 0; i < nextPoints.Length; i++) {

			// Get each point so we can find its position
			// in relation to the current TurningPoint
			TurningPoint nextPoint = nextPoints [i];

			// Get the Vector to the next TurningPoint
			// Returns (1, 0) for right, (0, -1) for down, etc.
			Vector2 pointVect = nextPoint.transform.localPosition - transform.localPosition;

			// Store vector to Vector2 array
			// Without normalized the values wouldn't be 0, 1, or -1
			vectToNextPoint[i] = pointVect.normalized;
		}

	}
}

MsPacman.cs

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

// Used to find out if Pac-Man hits a wall
using System;

public class MsPacman : MonoBehaviour {

	public float speed = 0.4f;

	// Used to move Ms. Pacman
	private Rigidbody2D rb;

	// 5. Sprite used when Pac-Man is paused
	public Sprite pausedSprite;

	// Makes sure components have been created when the 
	// game starts
	void Awake(){
		// Get Pac-man Rigidbody
		rb = GetComponent<Rigidbody2D> ();
	}

	void Start(){
		rb.velocity = new Vector2 (-1, 0) * speed;
	}
		 
	void FixedUpdate(){

		float horzMove = Input.GetAxisRaw ("Horizontal");
		float vertMove = Input.GetAxisRaw ("Vertical");

		// Move Left
		if (Input.GetKeyDown ("a")) {

			// Changes the direction to left
			rb.velocity = new Vector2 (horzMove, 0) * speed;

			// Faces Pacman left
			transform.localScale = new Vector2 (1, 1);

			// Sets rotation to default
			transform.localRotation = Quaternion.Euler (0, 0, 0);
		} else if (Input.GetKeyDown ("d")) {

			// Changes the direction to right
			rb.velocity = new Vector2 (horzMove, 0) * speed;

			// Faces Pacman right
			transform.localScale = new Vector2 (-1, 1);

			// Sets rotation to default
			transform.localRotation = Quaternion.Euler (0, 0, 0);
		} else if (Input.GetKeyDown ("w")){

			// Move up
			rb.velocity = new Vector2 (0, vertMove) * speed;

			// Sets facing direction to default
			transform.localScale = new Vector2 (1, 1);

			// Rotate facing up
			transform.localRotation = Quaternion.Euler (0, 0, 270);
		} else if (Input.GetKeyDown ("s")){

			// Move Down
			rb.velocity = new Vector2 (0, vertMove) * speed;

			// Sets facing direction to default
			transform.localScale = new Vector2 (1, 1);

			// Rotate facing down
			transform.localRotation = Quaternion.Euler (0, 0, 90);
		}
	}
}