UNITY | PROJECT | 2D PlatFormer | 5. Collectables

Creating “Coin”

• create Coin
  • add Circle Collider 2D
    • make it Trigger Collider by checking Is Trigger
  • add RigidBody2D
    • make it Static Collider

 

“PlayerControl” Script

• in OnTriggerEnter2D() method,
  • if a collision with Coin happens
    • add score by 10
    • destroy the gameObject itself (=Coin)
  • OnTriggerEnter2D vs OnCollisionEnter2D
    • When there are TriggerColliders, use OnTriggerEnter2D
    • When there are normal Colliders, use OnCollisionEnter2D

 

Collecting Coin Working

 

ProjectSetting | Physics2Dsetting

• Uncheck “Queries Start in Colliders”
  • I guess Query there means anything to detect in physics such as RayCast
  • with that option checked, RayCasting starts from the inside of collider attached to GameObjects
  • with that option unchecked, RayCasting Starts from the collider attached to GameObjects

 

“Enemy” Inspector

• Tag as “Enemy”
• Set the layer as “Default”

 

“PlayerControl” Script

• create a function, PlayerRayCast(),
  • attach RayCast by using RayCastHit2D, and Physics2D.RayCast(vector2 origin, vector2 direction)
  • create an if statment,
    •  give Player jump by using GetComponent<RigidBody2D>.AddForce()

 

“PlayerControl” Script

• Add PlayerRayCast() function in Update() method

 

Jumping on “Enemy”

 

Experiment | Layer : Ignore RayCast

• put Enemy back in IgnoreRayCast Layer

 

RayCasting Not Working

• with the option, “Queries Start in Colliders” unchecked, Enemy is moving correctly because RayCasting Starts from the exterior of Collider attacked to Enemy
• with the fact that Enemy belongs to Ignore RayCast layer, the RayCasting feature is not working

 

“EnemyControl” Script

• in Update() method,
  • with the Raycasting feature, Enemy detects other objects horizontally
  • in the horizon, if Enemy collides with Player, Destroy Player

 

Jumping on “Enemy”

 

“PlayerControl” Script

• in PlayerRayCast(),
  • set if statements with the conditions,
    • if Player hit anything, and if it is Enemy, make Player jump on Enemy
    • if Player hit anything, and if it is not Enemy, set the flag for jump as true

“Player” can jump anywhere but “Enemy”

 

 

UNITY | PROJECT | 2D PlatFormer | 4. Score System

“PlayerScore” Script

• create timeLeft & playerScore
• in Update() method,
  • make timeLeft pass by using Time.deltaTime
  • create an if statement
    • when the time reaches approximately 0, load the scene again
• in Awake() method,
  • temporarily, set the time into 5

“Player” Inspector

 

Time is passing

 

Creating “EndLevel”

• create EndLevel from empty gameObject
  • add Box Collider
    • check is Trigger to make it as Trigger Collider
  • add RigidBody2D
    • set Body Type as Static
      • to make the gameObject immovable
      • the least resource-intensive body type
      • only collides with Dynamic RigidBody2D
      • Having two Static RigidBody2Ds colldie is not supproted

“PlayerScore” Score

• create a Function, CountScore(),
  • update playerScore by calculating with timeLeft
  • create OnTriggerEnter2D()
    • put CountScore() in to make it activated when collisions happen

 

End Level

Creating UI

 

“PlayerScore” script

• create GameObject variables for UIs
• in Update() method,
  • use text property in UIs by using GetComponent()

 

UI Working

UNITY TUTORIAL | PROJECT | Roll a Ball | 6. Collecting the Pick Up Object

Roll a Ball

Collecting the Pick Up Object

OnTriggerEnter() | CompareTag() | SetActive()

Add Tag

Add Tag

Add Tag

Apply Tag

Appy Tag

SetActive not working

selcting

Unity’s Physics Engine | Static Collider | Dynamic Collider | Trigger | Trigger Collider

Collier | Trigger

Collier | Trigger

RigidBody | Collider | Dynamic

Prefab | RigidBody | came to Dynamic

RigidBody | Gravity

RigidBody | Gravity | Partial Solution

RigidBody | Gravity | Kinematic

Gravity Overcome

 

Creating Variable as Reference

Creating UI Text

Chaing Position of UI

Configuring

NameSpace | UnityEngine.UI

Text.text | ToString

Custom Method to make the script shorter

Private Variable

 

Text UI

 

Creating Win Text

changing​ the location of UI Text

Using Custom Method

Custom Variable

Private Variable

UI Text