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!