RayCasting – L’atelier d’Hyobin

UNITY | Project | RPG Tutorial | 20. Death Of Boss & Open Gate

create variables for
- enemy health as 20 for boss
- spider boss itself
- flag for spider’s status
- EXP when we kill the boss
- EXP calculated relatively to Player’s level
- spider’s AI
- spider’s status
- NPCs
- flag for spider’s attack
in Start() method,
- get the components of SpiderAI and SpiderAttack
create a function, DetuctPoint(),
- when enemy is attacked, enemy’s health is decreased by the damageAmount
in Update() method,
- make the spider’s status as global
- if enemy’s health is less than 0
  - start the coroutine, DeathSpider
create IEnumerator DeathSpider(),
- when spider is dead, disable the AI Script
- set the spider’s status as 6
- calculate the EXP
- play the animation for death
- turn on or off the NPCs

create variables
- distance between Player and Gate
- UI Buttons
- Gates themselves
in Update() method,
- get the distance by using PlyerCasting Class
in OnMouseOver() method,
- if the distance is less than 3
  - Player’s attack is blocked
  - showing the UI Buttons
  - if Action Button is pressed,
    - the collider attached to the gate is disabled
    - update Attack Blocking
    - UI Buttons disappear
    - play the Animations of opening Gate

create a variable for Player
in Update() method,
- make Spider keep looking at Player by using transform.Lookat()

in Update() method,
- add another if statement,
- - if attackTrigger is 1
- - - set the speed of Spider into 0
- - - make spider attack with animation, “attack”
in OntriggerEnter() method,
- when spider touches somthing(Player), set attackTrigger into 1
in OntriggerExit() method,
- when Player has escaped Spider, set attackTrigger into 0 to make it stop attack

create Variables
- damageAmount for Damage Amount for this weapon
- allowedRange for Reach of this weapon
in Update() method,
- when Left Mouse Button is pressed,
  - create a RayCastHit variable
  - put the RayCast in the variable
  - when the Distance obtained by RayCasting(hit.distance) is lower than the Reach(allowedRange),
    - hit.transform is in this context, the enemy spider
    - Enemy spider has the function, DeductPoints
    - make the funtion attached to Enemy GameObject activated by using SendMessage activated
      - InflictDamage will send a message to SpiderEnemy and activate the function
    - since we don’t want to put a receiver for the message in the spider object, set the option, DontRequireReceiver

create a variable for the Spider’s Health
create a function, DeductPoint with argument, int damageAmount
- deduct the damage from the health when this function is activated
in Update() method,
- if the health is below than 0,
  - get the coroutine started
create a IEnumerator, DeathSpider()
- wait for 0.5 sec before destroying the gameObject

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

with the rayCasting downwards, detect Enemy
- Kill Enemy
  - enter Enemy‘s properties to modify gravityScale, FreezeRotation, BoxCollider2D, EnemyControl