Watch and learn how to create a simple 2D platformer in Unity 5.0
- Download Files
- Add Standard Assets -> 2D
- Open scene "Default"
- Watch instruction videos from the link below
https://www.youtube.com/playlist?list=PLo35hhxbk9J6xOECWUQbVainn5kCJQNbt
Enjoy!
Dr. LLama
Level Manager
using UnityEngine;
using System.Collections;
using System.Collections.Generic;
using System;
public class LevelManager: MonoBehaviour {
public enum Orientation {
XY,
XZ
}
// holds the definition of a tile
[Serializable]
public class Tile {
// id of the tile, should be a single letter
public char id;
// reference to the tile
public GameObject tile;
}
public Orientation orientation;
public List<Tile> tiles;
public string startLevel;
void Start() {
if (!string.IsNullOrEmpty (startLevel)) {
this.LoadWorld(startLevel);
}
}
public void LoadWorld(string definitionFile) {
// load file from the resource folder (Assets/Resources)
// the file has text format
var world = Resources.Load<TextAsset> ("Levels/" + definitionFile);
// the structure of the file is
// 1.......2........
// ......1111......4
var worldText = world.text;
var worldLines = world.text.Split('\n');
// browse all lines and instantiate objects at desired positions
for (var reverseRowIndex=worldLines.Length - 1; reverseRowIndex>=0; reverseRowIndex--) {
var line = worldLines[reverseRowIndex];
var rowIndex = worldLines.Length - reverseRowIndex;
for (var columnIndex=0; columnIndex<line.Length; columnIndex++) {
// assign tileId
var tileId = line[columnIndex];
// if it is an empty space, move on
if (tileId == '.' || tileId == ' ') {
continue;
}
// find the tile
var tile = this.tiles.Find(w => w.id == tileId);
// if tile does not exists, notify developer
if (tile == null) {
Debug.LogErrorFormat("Tile with id '{0}' does not exists!", tileId);
}
// instantiate tile at a given position according to orientation
if (this.orientation == Orientation.XY) {
Instantiate(tile.tile, new Vector3(columnIndex, rowIndex, 0), Quaternion.identity);
} else if (this.orientation == Orientation.XZ) {
Instantiate(tile.tile, new Vector3(columnIndex, 0, rowIndex), Quaternion.identity);
}
}
}
// make camera follow player
var follow = Camera.main.GetComponent<SmoothFollow2D>();
follow.target = GameObject.FindGameObjectWithTag("Player").transform;
}
}SmoothFollow2D
using UnityEngine;
public class SmoothFollow2D : MonoBehaviour
{
// The target we are following
[SerializeField]
public Transform target;
// the height we want the camera to be above the target
[SerializeField]
private float height = 0.0f;
[SerializeField]
private float moveDamping = 1;
private Transform trans;
// Use this for initialization
void Start() {
this.trans = transform;
}
// Update is called once per frame
void LateUpdate()
{
// Early out if we don't have a target
if (!target)
return;
// Calculate the current rotation angles
var wantedHeight = target.position.y + height;
// Damp the height
trans.position = Vector3.Lerp(trans.position, new Vector3(target.position.x, wantedHeight, trans.position.z), moveDamping * Time.deltaTime);
}
}using UnityEngine;
using System.Collections;
public class MarioController : MonoBehaviour {
public float maximumSpeed = 10f;
public float jumpHeight = 3f;
public LayerMask whatIsGround;
public float airControlHandicap = 0.5f;
bool grounded = false;
Rigidbody2D r2d;
Animator anim;
bool jump;
// Use this for initialization
void Start () {
r2d = GetComponent<Rigidbody2D> ();
anim = GetComponentInChildren <Animator> ();
}
private void Update()
{
if (!jump)
{
// Read the jump input in Update so button presses aren't missed.
jump = Input.GetButtonDown("Jump");
}
}
// Update is called once per frame
void FixedUpdate () {
float h = Input.GetAxis("Horizontal");
grounded = false;
// find all colliders that are under player's feet
Collider2D[] colliders = Physics2D.OverlapCircleAll(transform.position, 0.2f, whatIsGround);
for (int i = 0; i < colliders.Length; i++)
{
if (colliders[i].gameObject != gameObject)
grounded = true;
}
anim.SetBool("Grounded", grounded);
// Pass all parameters to the character control script.
Move(h, jump);
// set that we are not jumping anymore
jump = false;
}
void Move(float move, bool jump) {
// if we are not in air, we allow character to move
if (grounded || airControlHandicap > 0) {
// set velocity which player is moving
// if player is in the air handicap is added
r2d.velocity = new Vector2 (
move * maximumSpeed * (grounded ? 1 : airControlHandicap),
r2d.velocity.y);
anim.SetFloat ("Speed", Mathf.Abs (move));
// AUTO FLIP
if (move > 0) {
if (transform.localScale.x != 1) {
transform.localScale = new Vector3(1f, 1f, 1f);
}
}
// going right
else if (move < 0) {
if (transform.localScale.x != -1) {
transform.localScale = new Vector3(-1f, 1f, 1f);
}
}
}
// If the player should jump...
if (grounded && jump && anim.GetBool("Grounded"))
{
// Add a vertical force to the player.
grounded = false;
anim.SetBool("Grounded", false);
r2d.AddForce(new Vector2(0f, jumpHeight));
}
}
}using UnityEngine;
using System.Collections;
public class PlatformMoveLeftRight : MonoBehaviour {
public float span = 2;
public float speed = 1;
private bool goingRight = true;
private Vector3 leftPosition;
private Vector3 rightPosition;
private Transform trans;
private Rigidbody2D r2d;
// Use this for initialization
void Start () {
// remember original position
leftPosition = transform.position;
r2d = GetComponent<Rigidbody2D>();
// remember up position
rightPosition = new Vector3(
transform.position.x + span,
transform.position.y,
transform.position.z
);
trans = this.transform;
}
// Update is called once per frame
void FixedUpdate () {
if (goingRight) {
//trans.Translate(Time.deltaTime * speed, 0f, 0f);
r2d.MovePosition(new Vector2(trans.position.x + Time.deltaTime * speed, trans.position.y));
if (trans.position.x > rightPosition.x) {
goingRight = false;
}
} else {
r2d.MovePosition(new Vector2(trans.position.x - Time.deltaTime * speed, trans.position.y));
//trans.Translate(- Time.deltaTime * speed, 0f, 0f);
if (trans.position.x < leftPosition.x) {
goingRight = true;
}
}
}
}using UnityEngine;
using System.Collections;
public class PlatformMoveUpDown : MonoBehaviour {
public float verticalSpan = 2;
public float speed = 1;
private bool goingUp = true;
private Vector3 bottomPosition;
private Vector3 upPosition;
private Transform trans;
private Rigidbody2D r2d;
// Use this for initialization
void Start () {
// remember original position
bottomPosition = transform.position;
// remember up position
upPosition = new Vector3(
transform.position.x,
transform.position.y + verticalSpan,
transform.position.z
);
trans = this.transform;
r2d = GetComponent<Rigidbody2D>();
}
// Update is called once per frame
void FixedUpdate () {
if (goingUp) {
r2d.MovePosition(new Vector2(trans.position.x, trans.position.y + Time.deltaTime * speed));
if (trans.position.y > upPosition.y) {
goingUp = false;
}
} else {
r2d.MovePosition(new Vector2(trans.position.x, trans.position.y - Time.deltaTime * speed));
if (trans.position.y < bottomPosition.y) {
goingUp = true;
}
}
}
}using UnityEngine;
using System.Collections;
public class AutoFlip : MonoBehaviour {
float lastX;
// initialise
void Start() {
lastX = transform.position.x;
}
// Update is called once per frame
void Update () {
// going left
if (lastX > transform.position.x) {
if (transform.localScale.x != 1) {
transform.localScale = new Vector3(1f, 1f, 1f);
}
}
// going right
else {
if (transform.localScale.x != -1) {
transform.localScale = new Vector3(-1f, 1f, 1f);
}
}
lastX = transform.position.x;
}
}