Trigger – L’atelier d’Hyobin

UNITY | Project | RPG Tutorial | 19. NavMesh & Boss AI

when Player finishes the first Quest, change the saying of NPC by changing QuestNumber in QuestManager

create variables
- where spider boss goes
- NavMeshAgent
in Start() method,
- make the NavMeshAgent variable NavMeshAgent
in Update() method,
- through the NavMeshAgent variable, set where the boss to go

to prevent the boss from walking through the barriers, bake the barriers Non Walkable

create variables
- spider boss itself
- as flag for attacking
in Update() method,
- if attackTrigger is 0
  - make the boss walk with the animation
- if attackTrigger is 0
  - if dealDamage is 0
    - get the boss attack by player the animation
    - get the coroutine TakingDamage started
create IEnumerator TakingDamage()
- set dealDamage into 2
- wait for 1.1 sec
- if spider’s status is not dead
  - get rid of one heart of Player
- wait for 0.5 sec
- set dealDamage into 0
in OnTriggerEnter() method,
- when the boss touches Player, set attackTrigger into 1
in OnTriggerExit() method,
- when Player gets out of the boss, set attackTrigger into 0

Be careful with the order of variables
- we are going to show internalEXP variable, which is the path for currentEXP , static variable
- so, put the static variable in the path variable

even though the marker is on from the first moment, with the fact that the marker belongs to a GameObject which is turned off, the marker is off automatically
move the maker outside of the object

add variables for exMarker and Trigger
when retrieving the Sword from the chest, turn on the marker and trigger in the notice board

creating a static variable for the distance of RayCasting
- create another variable as a internal path for the static variable
in Update() method,
- imply a RayCasting from the mission board, with the direction of forward
- with out keyword, put the information of RayCasting into hit variable
- put the distance between the mission board and player in toTarget
- connect the static variable and the path variable

creating Variables
in Update() method,
- put the distance from the RayCasting in PlayerCasting Class into “distance”
  - for this, distanceFromTarget is set as Static
in OnMouseOver() method,
- if the distance of RayCasting is less than 3,
  - set ActionButton and ActionText active
  - if Action button is pressed,
    - set actionButton, ActionText, and Player inactive
    - set UIQuest and Notice Camera active
in OnMouseExit() method,
- set actionButton and actionText inactive

Be careful with the position of Triggers
If it’s buried in the other objects like the notice board, it is not detected by RayCasting

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

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

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

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

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

11.2

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