How to Make Video Games 28
As we continue making Zelda, I’ll show you how to make the camera follow Link. We’ll create a script that animates Link smoothly. I’ll show you how to handle collisions between game assets and I’ll demonstrate the usefulness of tags. We’ll also make a Sound Manager we’ll use the play all our sounds and much more.
Like always all of the code follows the video below. Here is a link to the sprite files used.
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Code from the Video
Link2.cs
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using System.Collections; using System.Collections.Generic; using UnityEngine; // Used so I can use Floor using System; public class Link2 : MonoBehaviour { // Speed Link moves public float speed; // Used to move Link private Rigidbody2D rb; // Used to access the function IsValidSpace in Gameboard.cs // Gameboard gameBoard; // Get reference to the SoundManager for functions // SoundManager soundManager; // Used to change Link animations Animator animator; // Makes sure components have been created when the // game starts void Awake(){ // Get Links Rigidbody rb = GetComponent<Rigidbody2D> (); // Setup Gameboard so I can access functions // gameBoard = FindObjectOfType(typeof(Gameboard)) as Gameboard; // Get SoundManager reference // soundManager = GameObject.Find ("SoundManager").GetComponent<SoundManager> (); // Get Animator reference animator = GetComponent<Animator>(); } // Used to flip the animations bool facingRight = false; bool facingLeft = false; void FixedUpdate(){ // Get keyboard input float horzMove = Input.GetAxisRaw ("Horizontal"); float vertMove = Input.GetAxisRaw ("Vertical"); rb.velocity = new Vector2 (horzMove * speed, vertMove * speed); // NEW STUFF 1 if (Input.GetKey ("w") || Input.GetKey ("w")) { if (Input.GetKey ("s")) { animator.Play ("WalkDown"); } if (Input.GetKey ("w")) { animator.Play ("WalkUp"); } // NEW STUFF 1 } else { if (Input.GetKey ("d")) { animator.Play ("WalkRight"); // Flips the animation to the right if (facingLeft) { facingRight = true; facingLeft = false; animator.transform.Rotate (0, 180, 0); } else if (!facingLeft) { facingRight = true; } } if (Input.GetKey ("a")) { animator.Play ("WalkRight"); // Flips the animation to the left if (facingRight) { facingLeft = true; facingRight = false; animator.transform.Rotate (0, 180, 0); } else if (!facingRight) { facingLeft = true; } } } // Switches back to the Idle position if a key is released if (Input.GetKeyUp ("s")) { animator.Play ("Idle"); // When stopped Link will move back into a valid position float centerX = (float)Math.Round(Convert.ToDouble(transform.position.x)); float centerY = (float)Math.Round(Convert.ToDouble(transform.position.y)); transform.position = new Vector2(centerX, centerY); } } // NEW void Update(){ if (Input.GetKey (KeyCode.Space)) { animator.SetTrigger ("AttackRight"); Debug.Log ("HELLO"); } } // END OF NEW } |
SoundManager.cs
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using System.Collections; using System.Collections.Generic; using UnityEngine; public class SoundManager : MonoBehaviour { // Create Empty in the Hierarchy, name it SoundManager // Add Component -> Audio -> Audio Source // Drag sounds into Sounds Folder // Create SoundManager.cs // Drag sounds from folder to SoundManager Inspector // Drag EatingDots to AudioClip in Inspector // Holds the single instance of the SoundManager that // you can access from any script public static SoundManager Instance = null; // Sound clips for Link // 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); } } |
CameraMove.cs
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using System.Collections; using System.Collections.Generic; using UnityEngine; public class CameraMove : MonoBehaviour { // Put Link here to track his movement public Transform cameraTarget; // How quickly the camera moves towards Link 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); } } } |
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