Kick start Unity

In this blog we will be learning how to create a little 2D game.

This is focused towards absolute beginners , want to try Unity.

Step1: Open Unity Hub -> Create a new project with 2D template .

Step2 : Import assets just by drag and drop.

Step3: You can create 2D assets inside Unity .

From the assets take the Ground and Tank and place like this.(or you can create your own models like shown in the picture).

Tank settings

Bullets settings

Bird settings

Create a folder “Prefabs” and drag the bullets and bird objects in that folder to make a prefab out of them.

create a C# script “movement” and add it to Tank game object .

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
public class movement : MonoBehaviour
{
public GameObject bulletprefab;
public Transform firePoint;
public float speed=3f;
// Start is called before the first frame update
void Start()
{
}
// Update is called once per frame
void Update()
{
float horizontal = Input.GetAxisRaw("Horizontal");
transform.position+=new Vector3(horizontal*speed*Time.deltaTime,0f,0f);
if(Input.GetMouseButtonDown(0)){
fire();
}
}
void fire(){
Instantiate(bulletprefab,firePoint.position,Quaternion.identity);
}
}

Create a C# script “destroy” and add it to wall gameObject.

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class destroy : MonoBehaviour
{
// Start is called before the first frame update
void Start()
{
}
// Update is called once per frame
void Update()
{
}
private void OnTriggerEnter2D(Collider2D other) {
if(other.tag=="Bird"){
Debug.Log("Bird");
other.gameObject.SetActive(false);
}
}
}

Create an empty game object and place it outside of camera boundary.

Create a C# script and add to the empty gameObject in my case i have named it “Spawn”.

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class spawn : MonoBehaviour
{
public GameObject birdPrefab;
public float interval=0.3f;
float time=0f;
// Start is called before the first frame update
void Start()
{
}
// Update is called once per frame
void Update()
{
time+=Time.deltaTime;
if(time>interval){
Instantiate(birdPrefab,new Vector3(transform.position.x,Random.Range(3.25f,4.29f),0f),Quaternion.identity);
time=0;
}
}
}

Now we have to create two scripts for bird and bullets .

Create a C# script and add it to bird prefab or you can do this step before converting the gameObject as prefab as well .

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class bird : MonoBehaviour
{
public float speed=3.5f;
// Start is called before the first frame update
void Start()
{
}
// Update is called once per frame
void Update()
{
transform.position-=new Vector3(speed*Time.deltaTime,0f,0f);
}
}

Similarly do for bullets prefab.

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class bullets : MonoBehaviour
{
public static bullets instance; // Creating a singleton pattern
private void Awake() {
instance=this;
}
private float speed=4f;
// Start is called before the first frame update
void Start()
{
}
// Update is called once per frame
void Update()
{
transform.position+=new Vector3(0f,speed*Time.deltaTime,0f);
}
public void OnTriggerEnter2D(Collider2D other) {
if(other.tag=="Bird"){
print("Bird encountered");
gameObject.SetActive(false);
other.gameObject.SetActive(false);
}
}
}

And this should work just fine.

You can download the project from https://github.com/49paunilay/KickStart-Unity-Medium-blog-Tut

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Bird Artist =>https://www.linkedin.com/in/rakesh-mohata-6b2a70176/