How to Make Video Games 15
In this part of my tutorial on how to make a Super Mario Clone we cover a ton of topics! We cover how to Fix Collision Errors, Fix Scene Errors, AnimationCurve, Moving the UI with the Camera, Block Collisions, Reacting to Collisions from 1 Direction, Exploding Brick Blocks, Coins, Sounds and More.
Like always the code follows the video below. Here are all the Images and Sounds used.
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Download all of my Unity game files so far for Pong, Space Invaders, Tetris and Mario
CameraMove.cs
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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
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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); } */ } |
SoundManager.cs
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using System.Collections; using System.Collections.Generic; using UnityEngine; public class SoundManager : MonoBehaviour { // Holds the single instance of the SoundManager that // you can access from any script public static SoundManager Instance = null; // All sound effects in the game // All are public so you can set them in the Inspector public AudioClip jump; public AudioClip getCoin; public AudioClip rockSmash; // Refers to the audio source added to the SoundManager // to play sound effects private AudioSource soundEffectAudio; // Use this for initialization void Start() { // This is a singleton that makes sure you only // ever have one Sound Manager // If there is any other Sound Manager created destroy it if (Instance == null) { Instance = this; } else if (Instance != this) { Destroy (gameObject); } AudioSource theSource = GetComponent<AudioSource> (); soundEffectAudio = theSource; } // Other GameObjects can call this to play sounds public void PlayOneShot(AudioClip clip) { soundEffectAudio.PlayOneShot(clip); } } |
PrizeBlock.cs
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using System.Collections; using System.Collections.Generic; using UnityEngine; // Needed to manipulate the UI using UnityEngine.UI; public class PrizeBlock : MonoBehaviour { public AnimationCurve anim; public int coinsInBlock = 5; void OnCollisionEnter2D(Collision2D col){ // Check if the collision hit the bottom of the block if (col.contacts [0].point.y < transform.position.y) { // Calls RunAnimation which will be paused // and resumed over time StartCoroutine (RunAnimation()); } // If block contains coins if (coinsInBlock > 0) { // Play coin sound SoundManager.Instance.PlayOneShot (SoundManager.Instance.getCoin); // Increase the Score Text component increaseTextUIScore(); coinsInBlock--; } } IEnumerator RunAnimation(){ // Get starting position of PrizeBlock Vector2 startPos = transform.position; // Cycle through all the keys in the animation curve for (float x = 0; x < anim.keys[anim.length-1].time; x += Time.deltaTime) { // Change the block position to what is defined // on the AnimationCurve transform.position = new Vector2 (startPos.x, startPos.y + anim.Evaluate (x)); // Continue looping at next update yield return null; } } // Increases the score the the text UI name passed void increaseTextUIScore(){ // Find the Score UI component var textUIComp = GameObject.Find("Score").GetComponent<Text>(); // Get the string stored in it and convert to an int int score = int.Parse(textUIComp.text); // Increment the score score += 10; // Convert the score to a string and update the UI textUIComp.text = score.ToString(); } } |
BrickBlock.cs
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using System.Collections; using System.Collections.Generic; using UnityEngine; public class BrickBlock : MonoBehaviour { // Used to change the sprite private SpriteRenderer sr; // The sprite to change into public Sprite explodedBlock; // Wait time before switching sprites public float secBeforeSpriteChange = .2f; void Awake(){ sr = GetComponent<SpriteRenderer> (); } // Called when something hits the BrickBlock void OnCollisionEnter2D(Collision2D col){ // Check if the collision hit the bottom of the block if (col.contacts [0].point.y < transform.position.y) { // Play sound SoundManager.Instance.PlayOneShot (SoundManager.Instance.rockSmash); // Change the Block sprite sr.sprite = explodedBlock; // Wait a fraction of a second and then destroy the BrickBlock DestroyObject (gameObject, secBeforeSpriteChange); } } } |
Coin.cs
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using System.Collections; using System.Collections.Generic; using UnityEngine; // Needed to manipulate the UI using UnityEngine.UI; public class Coin : MonoBehaviour { // Called when something hits the Coin void OnCollisionEnter2D(Collision2D col){ // Play coin sound SoundManager.Instance.PlayOneShot (SoundManager.Instance.getCoin); // Increase the Score Text component increaseTextUIScore(); Destroy (gameObject); } // Increases the score the the text UI name passed void increaseTextUIScore(){ // Find the Score UI component var textUIComp = GameObject.Find("Score").GetComponent<Text>(); // Get the string stored in it and convert to an int int score = int.Parse(textUIComp.text); // Increment the score score += 10; // Convert the score to a string and update the UI textUIComp.text = score.ToString(); } } |
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