Просмотр кода страницы Roll-a-Ball (Unity)

{{TOCRight}}

== Setting up the Game ==
=== Create a new Unity project ===
# Login
# New Project - 3D (URP) - Universal Render Pipeline

=== Create a new Scene ===
# Layout
# All files in "Template" folder
# File - New scene
# File - Save as - Minigame (Scenes folder)
	
=== Create a primitive plane ===	
# Add GameObject - Plane
# Rename "Ground"
# Reset transform
# F to focus
# Grid settings
	
=== Scale the Ground plane ===
# Scale  x-2 y-1 z-2

=== Create a player GameObject ===
# Add GameObject - Sphere
# Reset transform
# F to focus
# Unity unit - 1 meter
# Elevate Sphere y +0.5

=== Adjust the default lighting ===
# Game view
# Directional light - set color to white
# Directional light rotation: x-50 y-50 z-0

=== Add colors with Materials ===
# Create materials folder
# Create background material - 130/130/130 - metallic - 0 / smoothness - 0.25
# Create player material - 0/220/255 - metallic - 0 / smoothness - 0.75
# Drag material to object

== Moving the player ==
=== Add a Rigidbody to the player ===
# Add physics component to player - Rigidbody

=== Install the Input System package ===
# Window - Package manager - Input system - Install
# Enable new backend system - Yes
# (Windows only) File - Build settings - Architecture - x86_64

=== Add a Player Input component ===
# Add Player Input component to player
# Create Input actions - "Create actions" button
# Create "Input" folder - save action "InputActions"	
# In Player Input - Actions field choose created Asset

=== Create a new script ===
# Create "Scripts" folder
# Add "PlayerController" script to player

=== Write the OnMove function declaration ===
# Remove Update function
# Namespaces
# Add namespace "UnityEngine.InputSystem"
# Create OnMove function (InputValue movementValue)	

=== Apply input data to the Player ===
In PlayerController 
<syntaxhighlight lang="c#" line>
Vector2 movementVector = movementValue.Get<Vector2>();

private Rigidbody rb;
</syntaxhighlight>
	
In Start function
<syntaxhighlight lang="c#" line>
rb = GetComponent<Rigidbody>();
</syntaxhighlight>
	
Add FixedUpdate() function

=== Apply force to the Player ===
<syntaxhighlight lang="c#" line>
private float movementX;
private float movementY;
</syntaxhighlight>
	
In OnMove
<syntaxhighlight lang="c#" line>
movementX = movementVector.x;
movementY = movementVector.y;
</syntaxhighlight>

In FixedUpdate
<syntaxhighlight lang="c#" line>
Vector3 movement = new Vector3(movementX, 0.0f, movementY);
rb.AddForce(movement);
</syntaxhighlight>

=== Fix the Player movement speed ===
<syntaxhighlight lang="c#" line>
public float speed = 10;
rb.AddForce(movement * speed);
</syntaxhighlight>

* speed in Editor

== Moving the camera ==
=== Set the Camera position ===
# Set camera position x=0 y=10 z=-10
# Rotate x=45 y=0 z=0
# Camera child of Player but will rotate with it

=== Write a CameraController script ===
Create CameraController script for camera
<syntaxhighlight lang="c#" line>
public GameObject player;
private Vector3 offset;
</syntaxhighlight>
	
In Start function calculate offset
<syntaxhighlight lang="c#" line>
offset = transform.position - player.transform.position;
</syntaxhighlight>
	
Update functions order undefined so we use LateUpdate
In LateUpdate function
<syntaxhighlight lang="c#" line>
transform.position = player.transform.position + offset;
</syntaxhighlight>

=== Reference the Player GameObject ===
# Drag player into player slot of the camera script

== Setting up the Play Area == 	
=== Create a wall for the play field ===
# Create empty object as root for Walls
# Create Cube as West/East/North/South walls
# Scale x=0.5 y=2 z=20.5
# Position -10
# New Material Walls - 79/79/79 - metallic 0 / smoothness - 0.25

=== Finish the play field walls ===
# Duplicate object
# Rotate or rescale

== Creating collectibles ==
=== Create a collectible GameObject ===
# Add cube
# Move up 0.5
# Scale 0.5
# Rotate 45 45 45
# Material Pickup color 255 200 0 - metallic 0 / smoothness - 0.25

=== Rotate the PickUp GameObject ===
Add Rotator script to pickup
Remove Start function
in Update function
<syntaxhighlight lang="c#" line>
transform.Rotate(new Vector3(15, 30, 45) * Time.deltaTime);
</syntaxhighlight>

=== Make PickUp a Prefab ===
# Create Prefabs folder
# Open Prefab edit mode

=== Add more collectibles ===
# New Empty Object - PickupParent
# Reset transform
# Duplicate Pickup and move	

== Detecting Collisions with Collectibles ==
=== Disable PickUps with OnTriggerEnter ===
<syntaxhighlight lang="c#" line>
PlayerController create OnTriggerEnter(Collider other)
other.gameObject.SetActive(false);
</syntaxhighlight>

=== Add a tag to the PickUp Prefab ===
# Add Pickup tag to PickUp Prefab
# Create & Apply

=== Write a conditional statement ===
<syntaxhighlight lang="c#" line>
OnTriggerEnter
if (other.gameObject.CompareTag("PickUp"))
</syntaxhighlight>

=== Set the PickUp Colliders as triggers ===
Set Pickup Collider prefab as IsTrigger

=== Add a Rigidbody to the PickUp Prefab ===
# Add to improve performance
# Disable Use Gravity
# Check IsKinematic - no Physics

== Displaying Score and Text ==
=== Store the value of collected PickUps ===
PlayerController
<syntaxhighlight lang="c#" line>
private int count;
</syntaxhighlight>
	
Start function 
<syntaxhighlight lang="c#" line>
count = 0;
</syntaxhighlight>
	
OnTriggerEnter	
<syntaxhighlight lang="c#" line>
count++;
</syntaxhighlight>

=== Create a UI text element ===
# Add UI => Text - TextMeshPro
# Import TMP Essentials
# All UI in Canvas
# Rename New Text CountText
# Add CountText as placeholder
# Anchor text left top with Alt + Shift
# PosX = 10 PosY = -10	

=== Display the count value ===
PlayerController
<syntaxhighlight lang="c#" line>
using TMPro;
public TextMeshProUGUI countText;
</syntaxhighlight>
	
new function SetCountText
<syntaxhighlight lang="c#" line>
countText.text = "Count: " + count.ToString();
</syntaxhighlight>
	
Add SetCountText() to Start and OnTriggerEnter
	
Drop Text object to script
	
EventSystem push "Replace with InputSystemUIInputModule"

=== Create a game end message ===
new TextMeshPro
# Text - Black size 32
# Set Text - You win!
# PosX = 0 posY = 130
# Align center
	
Add reference to text as GameObject

Disable in Start function - SetActive(false);
	
In SetCountText function
<syntaxhighlight lang="c#" line>
if (count >= 12)
{
	winText.gameObject.SetActive(true);
}
</syntaxhighlight>
	
Drop WinText in script

== Build the Game ==
=== Create a build of your game ===
# Save ALL
# Build Settings
# For web build 2020 disable compression
# Choose platform
# Add open scenes
# Scenes list
# Player settings
# Full screen or windowed