In this tutorial we continue making our Super Mario Clone! We cover Sorting Layers, Animations, Collisions, Controlling Characters, Awake(), Changing Characters Facing Direction, Jumping, Raycasting and Much More.

All of the code follows the video below. Here are all the Images and Sounds used in this series.

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Download all of my Unity game files so far for Pong, Space Invaders, Tetris and Mario

CameraMove.cs

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

public class CameraMove : MonoBehaviour {

	// Put Manny here to track his movement
	public Transform cameraTarget;

	// How quickly the camera moves towards Manny
	public float cameraSpeed;

	// Min and max X and Y movements
	public float minX;
	public float minY;
	public float maxX;
	public float maxY;

	// Update used when dealing with Rigid Bodies
	void FixedUpdate(){

		// Make sure the camera has a target
		if (cameraTarget != null) {

			// Lerp smoothes movement from the starting position
			// to the targets position 
			var newPos = Vector2.Lerp (transform.position,
				             cameraTarget.position,
				             Time.deltaTime * cameraSpeed);

			// Define the cameras new postion
			var vect3 = new Vector3 (newPos.x, newPos.y, -10f);

			// Clamp gets the cameras x position and clamps
			// it between the min and max value
			var clampX = Mathf.Clamp (vect3.x, minX, maxX);
			var clampY = Mathf.Clamp (vect3.y, minY, maxY);

			// Move the camera
			transform.position = new Vector3(clampX, clampY, -10f);
		}
	}
}

Manny.cs

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

public class Manny : MonoBehaviour {

	// Defines Mannys speed horizontally
	public float speed = 5;

	// Defines Mannys facing direction
	public bool facingRight = true;

	// Jump speed
	public float jumpSpeed = 5f;

	// Mannys components
	private SpriteRenderer sr;
	private Rigidbody2D rb;
	private Animator animator;

	// Will flip depending if on ground
	bool isJumping = false;

	// Used to check if Manny is on the ground
	// You draw a line out away from the sprite a defined
	// distance and check if it collides with something
	// If it hits nothing Raycast() returns null
	private float rayCastLength = 0.005f;

	// Sprite width and height
	private float width;
	private float height;

	// How long is the jump button held
	private float jumpButtonPressTime;

	// Max jump amount
	public float maxJumpTime = 0.2f;

	void FixedUpdate(){

		// Get horizontal movement -1 Left, or 1 Right
		float horzMove = Input.GetAxisRaw ("Horizontal");

		// Need to get Mannys y
		Vector2 vect = rb.velocity;

		// Change x and keep y as is
		rb.velocity = new Vector2 (horzMove * speed, vect.y);

		// Set the speed so the right Animation is played
		animator.SetFloat("Speed", Mathf.Abs(horzMove));

		// Makes sure Manny is facing the right direction
		if (horzMove > 0 && !facingRight) {
			FlipManny ();
		} else if (horzMove < 0 && facingRight) {
			FlipManny ();
		}

		// Get vertical movement
		float vertMove = Input.GetAxis ("Jump");

		if (IsOnGround () && isJumping == false) {
			if (vertMove > 0f) {
				isJumping = true;
			}
		}

		// If button is held pass max time set 
		// vertical move to 0
		if (jumpButtonPressTime > maxJumpTime) {
			vertMove = 0f;
		}

		// If is jumping and we have a valid jump press length
		// make Manny jump
		if (isJumping && (jumpButtonPressTime < maxJumpTime)) {
			rb.velocity = new Vector2 (rb.velocity.x, jumpSpeed);
		}

		// If we have moved high enough make Manny fall
		// Set Mannys Rigidbody 2d Gravity Scale to 2
		if (vertMove >= 1f) {
			jumpButtonPressTime += Time.deltaTime;
		} else {
			isJumping = false;
			jumpButtonPressTime = 0f;
		}

	}

	// Makes sure components have been created when the 
	// game starts
	void Awake(){
		sr = GetComponent<SpriteRenderer> ();
		animator = GetComponent<Animator> ();
		rb = GetComponent<Rigidbody2D> ();

		// Gets Mannys collider width and height and
		// then adds more to it. Used to raycast to see
		// if Manny is colliding with anything so we
		// can jump
		width = GetComponent<Collider2D> ().bounds.extents.x + 0.1f;
		height = GetComponent<Collider2D> ().bounds.extents.y + 0.2f;
	}

	// When moving in a direction face in that direction
	void FlipManny(){

		// Flip the facing value
		facingRight = !facingRight;

		Vector3 scale = transform.localScale;
		scale.x *= -1;
		transform.localScale = scale;
	}

	public bool IsOnGround(){

		// Check if contacting the ground straight down
		bool groundCheck1 = Physics2D.Raycast (new Vector2 (
			                    transform.position.x,
			                    transform.position.y - height),
			                    -Vector2.up, rayCastLength);

		// Check if contacting ground to the right
		bool groundCheck2 = Physics2D.Raycast (new Vector2 (
			transform.position.x + (width - 0.2f),
			transform.position.y - height),
			-Vector2.up, rayCastLength);

		// Check if contacting ground to the left
		bool groundCheck3 = Physics2D.Raycast (new Vector2 (
			transform.position.x - (width - 0.2f),
			transform.position.y - height),
			-Vector2.up, rayCastLength);

		if (groundCheck1 || groundCheck2 || groundCheck3)
			return true;

		return false;

	}

	// If Manny falls off the screen destroy the game object
	/*
	void OnBecameInvisible(){
		Debug.Log ("Manny Destroyed");
		Destroy (gameObject);
	}
	*/
}