Unit 2
https://learn.unity.com/tutorial/unit-2-introduction?uv=2021.3&pathwayId=5f7e17e1edbc2a5ec21a20af&missionId=5f71fe63edbc2a00200e9de0&projectId=5cdcc312edbc2a24a41671e6#5d1ba822edbc2a002175788d

Introduction
we will make a top down prototype where you shoot things that come after you, kindof like galiga except in 3d and not at all like galiga XD

Lesson 2.1 - Player Positioning
Summary 
 
 
 
 
 Overview: 
 
 
 You will begin this unit by creating a new project for your second Prototype and getting basic player movement working. You will first choose which character you would like, which types of animals you would like to interact with, and which food you would like to feed those animals. You will give the player basic side-to-side movement just like you did in Prototype 1, but then you will use if-then statements to keep the Player in bounds. 
 
 
 
 Project Outcome: 
 
 
 
 The player will be able to move left and right on the screen based on the user’s left and right key presses, but will not be able to leave the play area on either side. 
 
 Materials 
 
Prototype 2 - Starter Files.zip Select your Unity version 
 2021.1 - 2021.3

1.Create a new Project for Prototype 2
Open Unity Hub and create an empty “ Prototype 2 ” project in your course directory on the correct Unity version. If you forget how to do this, refer to the instructions in Lesson 1.1 - Step 1 
 
 
 
 
 
 
 Click to download the Prototype 2 Starter Files , extract the compressed folder, and then import the .unitypackage into your project. If you forget how to do this, refer to the instructions in Lesson 1.1 - Step 2 
 
 
 
 
 
 
 From the Project window, open the Prototype 2 scene and delete the SampleScene 
 
 
 
 
 
 
 In the top-right of the Unity Editor, change your Layout from Default to your custom layout

2.Add the 3d assets + first few lines of code
If you want, drag a different material from Course Library > Materials onto the Ground object 
 
 
 Drag 1  Human , 3 Animals , and 1 Food object into the Hierarchy 
 
 
 Rename the character “ Player ”, then reposition the animals and food so you can see them 
 
 
 Adjust the XYZ  scale of the food so you can easily see it from above 
 
 
 
   
 
 
 
 
 Attach the script to the Player and open it 
 
 
 In your  Assets folder, create a “ Scripts ” folder, and a “ PlayerController ” script inside 
 
 
 At the top of PlayerController.cs, declare a new 
 
 
   [SerializeField ] 
 
 
 private float horizontalInput 
 
 
 In  Update() , set horizontalInput = Input.GetAxis(“Horizontal”) , then test to make sure it works in the inspector 
 
 
 
 
 
 using UnityEngine;

public class Movement : MonoBehaviour
{

   [SerializeField]

   private float horizontalInput;

   // Start is called before the first frame update

   void Start()

   {

     

   }

   // Update is called once per frame

   void Update()

   {

       horizontalInput = Input.GetAxis("Horizontal");

   }
} 
   
   
 4. Move the player left-to-right 
 
 here we can get our input with this basic code, we use [SerializeField] for sanitization and allow us to see the value in the inspection panel to make sure we didn't fck up lol 
 Declare a new  public float speed = 10.0f; 
 here's my code 
 
 
using UnityEngine;

public class Movement : MonoBehaviour
{
 [SerializeField]
 private float horizontalInput;
 [SerializeField]
 private float speed = 30.0f;
 // Start is called before the first frame update
 void Start()
 {
 
 }

 // Update is called once per frame
 void Update()
 {
 horizontalInput = Input.GetAxis("Horizontal");
 transform.Translate(Vector3.right * horizontalInput * Time.deltaTime * speed);
 }
}
 
   
 5+6. Keep the player inbounds 
 
 
 In Update() , write an if-statement checking if the player’s left X position is less than a certain value 
 
 
 In the if-statement, set the player’s position to its current position, but with a fixed X location 
 
 
 Repeat this process for the right side of the screen 
 
 
 Declare new xRange variable, then replace the hardcoded values with them 
 
 
 
 Add comments to your code or not lol 
 
 
using UnityEngine;

public class Movement : MonoBehaviour
{
 [SerializeField]
 private float horizontalInput;
 [SerializeField]
 private float speed = 10.0f;
 [SerializeField]
 private float xRange = 20.0f;
 // Start is called before the first frame update
 void Start()
 {
 
 }

 // Update is called once per frame
 void Update()
 {
 if (transform.position.x < -xRange)
 {
 transform.position = new Vector3(-xRange, transform.position.y , transform.position.z);
 }
 if (transform.position.x > xRange)
 {
 transform.position = new Vector3(xRange, transform.position.y, transform.position.z);
 }
 horizontalInput = Input.GetAxis("Horizontal");
 transform.Translate(Vector3.right * horizontalInput * Time.deltaTime * speed);
 }
}
 
 
 
 
 
 
 New Functionality 
 The player can move left and right based on the user’s left and right key presses 
 The player will not be able to leave the play area on either side New Concepts & Skills Adjust object scale If-statements Greater/Less than operators Next Lesson, We’ll learn how to create and throw endless amounts of food to feed our animals! now use chat gpt to teach me thing and fix a bug that can occur when you move fast 
 float clampedX = Mathf.Clamp(desiredpoz.x, -Xrange, Xrange) become the min/max 
 using UnityEngine;
//needed a bit of editing coz cgpt3.5 is stoooooooopid
public class Movement : MonoBehaviour
{
 [SerializeField]
 private float speed = 10.0f;
 [SerializeField]
 private float xRange = 10.0f;
 [SerializeField]
 private float horizontalInput;
 // Start is called before the first frame update
 void Start()
 {

 }

 // Update is called once per frame
 void Update()
 {
 horizontalInput = Input.GetAxis("Horizontal");

 // Calculate the desired position based on the input
 Vector3 desiredPosition = transform.position + Vector3.right * -horizontalInput * Time.deltaTime * speed;

 // Clamp the desired position within the x range
 float clampedX = Mathf.Clamp(desiredPosition.x, -xRange, xRange);
 desiredPosition = new Vector3(clampedX, desiredPosition.y, desiredPosition.z);
 // Move the object to the clamped position
 transform.position = desiredPosition;
 }
}

3. Instantiation
The first thing we must do is give the projectile some forward movement so it can zip across the scene when it’s launched by the player. 
 
 1. Make the projectile fly forwards 
 
 
 Create a new “ MoveForward ” script, attach it to the food object, then open it 
 
 
 Declare a new  public float speed variable ; 
 
 
 In  Update() , add transform.Translate(Vector3.forward * Time.deltaTime * speed); , then save 
 
 
 In the  Inspector , set the projectile’s speed variable, then test 
 
 
 using UnityEngine;

public class Pizza_gun : MonoBehaviour
{
 public GameObject Ammo;

 public float Weapon_Bullet_Projectile_Speed = 60.0f;
 // Start is called before the first frame update
 void Start()
 {
 Ammo = GetComponent<GameObject>();
 }

 // Update is called once per frame
 void Update()
 {
 transform.Translate(Vector3.forward * Time.deltaTime * Weapon_Bullet_Projectile_Speed);
 }
}
 
 
 
 
 Create a new “ Prefabs ” folder, drag your food into it, and choose Original Prefab 
 
 
 In PlayerController.cs, declare a new  public GameObject projectilePrefab; variable 
 
 
 Select the Player in the hierarchy, then drag the object from your Prefabs folder onto the new Projectile Prefab box in the inspector 
 
 
 Try  dragging the projectile into the scene at runtime to make sure they fly 
 
 I added the ammo = get component thing for maybe powerups 
 In PlayerController.cs, in  Update() , add an if-statement checking for a spacebar press: if (Input.GetKeyDown(KeyCode.Space)) {} 
 Inside the if-statement, add a comment saying that you should  // Launch a projectile from the player 
 
 Inside the if-statement, use the Instantiate method to spawn a projectile at the player’s location with the prefab’s rotation 
 
 
 Select all three animals in the hierarchy and Add Component > Move Forward Rotate all animals on the Y axis by 180 degrees to face down 
 
 
 Edit their  speed values and test to see how it looks 
 
 
 Drag all three animals into the Prefabs folder , choosing “Original Prefab” 
 
 
 Test by dragging prefabs into scene view during gameplay 
 
 
 
 using UnityEngine;

public class Movement : MonoBehaviour
{
 [SerializeField]
 private float speed = 10.0f;
 [SerializeField]
 private float xRange = 10.0f;
 [SerializeField]
 private float horizontalInput;
 [SerializeField] 
 public GameObject ProjectilePrefab;
 // Start is called before the first frame update
 void Start()
 {

 }

 // Update is called once per frame
 void Update()
 {

 horizontalInput = Input.GetAxis("Horizontal");
 // Calculate the desired position based on the input
 Vector3 desiredPosition = transform.position + Vector3.right * -horizontalInput * Time.deltaTime * speed;
 // Clamp the desired position within the x range
 float clampedX = Mathf.Clamp(desiredPosition.x, -xRange, xRange);
 desiredPosition = new Vector3(clampedX, desiredPosition.y, desiredPosition.z);
 // Move the object to the clamped position
 transform.position = desiredPosition;
 if (Input.GetKeyDown(KeyCode.Space))
 {
 // shoot pizza
 Instantiate(ProjectilePrefab, transform.position, ProjectilePrefab.transform.rotation);
 }
 }
}
 
 
 
 
 5. Make animals into prefabs 
 
 
 Rotate all animals on the Y axis by 180 degrees to face down/ towards the player 
 
 
 Select all three animals in the hierarchy and Add Component > Move Forward 
 
 
 Edit their  speed values and test to see how it looks 
 
 
 Drag all three animals into the  Prefabs folder , choosing “Original Prefab” 
 
 
 Test by dragging prefabs into scene view during gameplay 
 
 
 6. Destroy projectiles offscreen 
 
 
 Create “ DestroyOutOfBounds ” script and apply it to the projectile 
 
 
 Add a new  private float topBound variable and initialize it = 30; 
 
 
 Write code to destroy if out of top bounds  if (transform.position.z > topBound) { Destroy(gameObject); } 
 
 
 In the Inspector  Overrides drop-down, click Apply all to apply it to prefab 
 
 
 7.  Destroy animals offscreen 
 
 
 Create else-if statement to check if objects are beneath lowerBound : else if (transform.position.z < lowerBound) 
 
 
 Apply the script to all of the animals, then Override the prefabs 
 
 
 
 8. Lesson Recap 
 
 
 
 New Functionality 
 
 
 The player can press the Spacebar to launch a projectile prefab, 
 
 
 
 
 
 Projectile and Animals are removed from the scene if they leave the screen 
 
 
 
 
 
 
 New Concepts & Skills 
 
 
 Create Prefabs 
 Override Prefabs 
 Test for Key presses 
 Instantiate objects 
 Destroy objects 
 
 
 
 Else-if statements 
 
 
 
 
 
 
 Next Lesson 
 
 
 Instead of dropping all these animal prefabs onto the scene, we’ll create a herd of animals roaming the plain! 
 
 
 ( 
 
 Lesson 2.2 - Food Flight 
 
 Skills practiced: 
 
 
 Absolute Beginner Code Comprehension 
 
 Interpret simple code 
 Improve simple code using the features of an IDE 
 
 
 
 Absolute Beginner Application Scripting 
 
 Use common logic structures to control the execution of code. 
 Write code that utilizes the various Unity APIs 
 Implement appropriate data types 
 Write code that integrates into an existing system 
 Implement a code style that is efficient and easy to read 
 Prototype new concepts 
 
 
 
 
 
 
 )

Random Animal Stampeed
1. Create a spawn manager 
 
 In the Hierarchy, create an  Empty object called “ SpawnManager ” 
 Create a new script called “ SpawnManager ”, attach it to the Spawn Manager , and open it 
 Declare new  public GameObject[ ] animalPrefabs; 
 In the Inspector, change the  Array size to match your animal count, then assign your animals by dragging them from the Project window into the empty slots Note: Make sure you drag them from the Project window; not the Hierarchy! If you're going to spawn objects, you need to make sure you're using Prefabs, which are stored in the Project window. 
 
 2. Spawn an animal if S is pressed 
 
 
 
 In Update() , write an if-then statement to instantiate a new animal prefab at the top of the screen if S is pressed 
 
 
 Declare a new  public int animalIndex and incorporate it in the Instantiate call, then test editing the value in the Inspector 
 
 
 3. Spawn random animals from an array 
 
 
 
 In the if-statement checking if S is pressed, generate a random int animalIndex between 0 and the length of the array 
 
 
 Remove the global  animalIndex variable, since it is only needed locally in the if-statement 
 
 
 
 4. Randomize the spawn location 
 
 
 
 Replace the X value for the Vector3 with Random.Range(-20, 20) , then test 
 
 
 Within the  if-statement , make a new local Vector3 spawnPos variable  
 
 
 At the top of the class, create  private float variables for spawnRangeX and spawnPosZ 
 
 
 5. Change the perspective of the camera 
 
 
 Toggle between Perspective and Isometric view in the Scene view to appreciate the difference 
 
 
 Select the  camera and change the Projection from “Perspective” to “Orthographic” 
 
 
 6. Lesson Recap 
 
 
 New Functionality 
 
 
 
 
 The player can press the S to spawn an animal 
 
 
 Animal selection and spawn location are randomized 
 
 
 Camera projection (perspective/orthographic) selected 
 
 
 
 New Concepts & Skills 
 
 
 
 
 Spawn Manager 
 
 
 Arrays 
 
 
 Keycodes 
 
 
 Random generation 
 
 
 Local vs Global variables 
 
 
 Perspective vs Isometric projections 
 
 
 
 
 Next Lesson 
 
 
 Using collisions to feed our animals!

Collision Decisions + GAME OVER
1.  Make a new method to spawn animals 
 
 
 In SpawnManager.cs , create a new void SpawnRandomAnimal() {} function beneath Update() 
 
 
 Cut and paste the code from the  if-then statement to the new function 
 
 
 Call  SpawnRandomAnimal(); if S is pressed 
 
 
 2. Spawn the animals at timed intervals 
 
 
 In Start() , use InvokeRepeating to spawn the animals based on an interval, then test . 
 
 
 Remove the if-then statement that tests for S being pressed 
 
 
 Declare new  private startDelay and spawnInterval variables then playtest and tweak variable values 
 
 
 3. Add collider and trigger components 
 
 
 
 Double-click on one of the animal prefabs , then Add Component > Box Collider 
 
 
 Click  Edit Collider , then drag the collider handles to encompass the object 
 
 
 Check the “ Is Trigger ” checkbox 
 
 
 Repeat this process for each of the  animals and the projectile 
 
 
 Add a  RigidBody component to the projectile and uncheck “use gravity” 
 
 
 4. Destroy objects on collision 
 
 
 
 Create a new DetectCollisions.cs script, add it to each animal prefab, then open it 
 
 
 Before the final  } add an  OnTriggerEnter function using autocomplete 
 
 
 In  OnTriggerEnter , put Destroy(gameObject) ; , then test 
 
 
 In  OnTriggerEnter , put Destroy(other.gameObject); 
 
 
 5. Trigger a “Game Over” message 
 
 
 In DestroyOutOfBounds.cs, in the else-if condition that checks if the animals reach the bottom of the screen, add a Game Over messsage: Debug.Log(“Game Over!”) 
 
 
 Clean up your code with  comments 
 
 
 If using Visual Studio, Click  Edit > Advanced > Format document to fix any indentation issues (On a Mac , click Edit > Format > Format Document) 
 
 
 6. Lesson Recap 
 
 
 New Functionality 
 
 
 Animals spawn on a timed interval and walk down the screen 
 When animals get past the player, it triggers a “Game Over” message 
 If a projectile collides with an animal, both objects are removed 
 
 
 
 
 
 
 New Concepts & Skills 
 
 
 Create custom methods/functions 
 InvokeRepeating() to repeat code 
 Colliders and Triggers 
 Override functions 
 Log Debug messages to console Pizza_gun 
 using UnityEngine;

public class Pizza_gun : MonoBehaviour
{
 [SerializeField]
 public float Weapon_Bullet_Projectile_Speed = 60.0f;
 [SerializeField] 
 private float topBound = -60;

 // Update is called once per frame
 void Update()
 {
 transform.Translate(Vector3.forward * Time.deltaTime * Weapon_Bullet_Projectile_Speed);

 if (transform.position.z < topBound)
 {
 Destroy(gameObject);
 }

 }
 private void OnTriggerEnter(Collider other)
 {
 Destroy(gameObject);
 Destroy(other.gameObject);
 }
}
 
 Spawn_manager 
 
 using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class SpawnManager : MonoBehaviour
{
 public GameObject[] animalPrefabs = new GameObject[10];
 [SerializeField] 
 private float spawnRangeX = 20.0f;
 [SerializeField] 
 private float spawnPozY = -20.0f;
 [SerializeField]
 private float startDelay = 5f;
 [SerializeField]
 private float spawnInterval = 2f;
 // Start is called before the first frame update
 void Start()
 {
 // invoke repeating, will make the method or void def function with name "nameInQuotes"
 // it will call that function after , delay, then chozen interval
 InvokeRepeating("SpawnRandomAnimal", startDelay, spawnInterval);
 }

 // Update is called once per frame
 void Update()
 {
 if (Input.GetKeyDown(KeyCode.S))
 {
 SpawnRandomAnimal();
 }
 }
 void SpawnRandomAnimal()
 {
 // Select a random index within the array range
 int random_animal_Index = Random.Range(0, animalPrefabs.Length);
 Vector3 spawnPos = new Vector3(Random.Range(-spawnRangeX, spawnRangeX), spawnPozY, -30);
 // Instantiate the selected animalPrefab
 Instantiate(animalPrefabs[random_animal_Index], spawnPos,
 animalPrefabs[random_animal_Index].transform.rotation);
 }
}
 
 
 
 movement 
 using UnityEngine;

public class Movement : MonoBehaviour
{
 [SerializeField]
 private float speed = 10.0f;
 [SerializeField]
 private float xRange = 10.0f;
 [SerializeField]
 private float horizontalInput;
 [SerializeField] 
 public GameObject ProjectilePrefab;
 // Start is called before the first frame update
 void Start()
 {

 }

 // Update is called once per frame
 void Update()
 {

 horizontalInput = Input.GetAxis("Horizontal");
 // Calculate the desired position based on the input
 Vector3 desiredPosition = transform.position + Vector3.right * -horizontalInput * Time.deltaTime * speed;
 // Clamp the desired position within the x range
 float clampedX = Mathf.Clamp(desiredPosition.x, -xRange, xRange);
 desiredPosition = new Vector3(clampedX, desiredPosition.y, desiredPosition.z);
 // Move the object to the clamped position
 transform.position = desiredPosition;
 if (Input.GetKeyDown(KeyCode.Space))
 {
 // shoot pizza
 Instantiate(ProjectilePrefab, transform.position, ProjectilePrefab.transform.rotation);
 }
 }
}
 
 Animal Movement 
 using UnityEngine;

public class AnimalMovement : MonoBehaviour
{

 public float Animal_Movement_Speed = 50.0f;
 public float lowerBound = 50;
 // Start is called before the first frame update
 void Start()
 {

 }

 // Update is called once per frame
 void Update()
 {
 transform.Translate(Vector3.forward * Time.deltaTime * Animal_Movement_Speed);
 if (transform.position.z > lowerBound)
 {
 Destroy(gameObject);
 Debug.Log("In the vernacular of your people... \n Game Over!");
 }
 }
}