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 | SPACE SHOOTER 2D | 7. Collision Detection

Creating Tags

• Create the tags for each GameObject

Tagging

• Tagging each GameObject with its own Tag

 

Adding Collider & RigidBody2D to “Player”

Adding Collider & RigidBody2D to “Enemy”

Adding Collider & RigidBody2D to “PlayerBullet”

Adding Collider & RigidBody2D to “EnemyBullet”

• Add Collider & RigidBody2D to each GameObject
  • Set “Is Trigger” in Collider to make it as “Trigger Collider”
  • Set “Gravity Scale“ in RigidBody2D to make them not to be affected by Gravity
  • Set “Freeze Rotation” in RigidBody2D to make them not spin when collided

OnTriggerEnter2D() | “PlayerControl” Script

OnTriggerEnter2D() | “EnemyControl” Script

OnTriggerEnter2D() | “PlayerBullet” Script

OnTriggerEnter2D() | “EnemyBullet” Script

• Add “OnTriggerEnter2D(Collider2D)” method to each GameObject to detect and activate “Destroy()”
• To Sort each Collision, Use “Collider2D.tag”

 

Collision Detection Working Well

“PlayExplosion()” | “PlayerControl” Script

“PlayExplosion()” | “EnemyControl” Script

• To Destroy “Player” or “Enemy”
  • Create a Function, “PlayExplosion()”
    • Instantiate the Explosion(Don’t forget to use “this.”)
  • Write the Function inside “TriggerEnter2D()” to make the instantiation of Explosion happen when a collision is detected

Explosion Animation & Collision Detection

UNITY TUTORIAL | PROJECT | SPACE SHOOTER |2. The Player Game Object

Adding Player GameObject

Resetting the position of “Player” into (0, 0, 0)

Transform.Position set to (0, 0, 0)

RigidBody Added | Gravity Unactivated

Capsule Collider Added

Changing Collider Size

Changing the direction of Collider into Z-Axis for configuration

Changing the Radius and Height of Collider

Adding “Mesh Collider” | only one collider should be added

“Mesh Renderer” off to see “Mesh Collider”

Simplified “Mesh” added to “Mesh Collider”

“Particle” added as Child GameObject of  “Player”

“Particle” effect

UNITY TUTORIAL | PHYSICS | 3D Physics | Colliders as Trigger

UNITY TUTORIAL

PHYSICS | 3D Physics | Colliders as Trigger

 

Trigger | BoxCollider | Is Trigger

 

Is Trigger

Trigger | BoxCollider | CollisionDetection script

OnTriggerEnter() | OnTriggerStay() | OnTriggerExit()

Falling Object | RigidBody

OnTriggerEnter() | OnTriggerStay() | OnTriggerExit()

Hovering​ Script

Collider.attachedRigidBody | AddForce() | ForceMode.Acceleration()

Hovering Simple

Hovering Force Changing

Freeze Position

Hovering with FallingObject Frozen

 

UNITY TUTORIAL | PHYSICS | 3D Physics | Collider

Unity Tutorial

Physics | 3D Physics | Collider

Sphere Collider

Capsule Collider

Box Collider

Collider for Complex Shapes

Collider Hierarchy

Collider Hierarchy

Collider Hierarchy

Mesh Collider

Complex Mesh

Complex Collider

Complex Mesh

Sphere Collider | RigidBody

Box Collider

Mesh Collider

Collision