make dragons breathe fire (#26746)

* add ActionGun system

* add RepeatingTrigger

* dragons breath projectile, repeatedly explodes

* give dragon fire breathing action, fireproof it

* oop

* oop 2

* prevent troll

* proper repeating thing

* pro

* webedit ops

* realops

---------

Co-authored-by: deltanedas <@deltanedas:kde.org>

Resources/Prototypes/Entities/Mobs/Player/dragon.yml

@@ -91,6 +91,12 @@
     speedModifierThresholds:
       250: 0.7
       400: 0.5
+  # disable taking damage from fire, since its a fire breathing dragon
+  - type: Flammable
+    damage:
+      types: {}
+  - type: Temperature
+    heatDamageThreshold: 800
   - type: Metabolizer
     solutionOnBody: false
     updateInterval: 0.25
@@ -141,10 +147,33 @@
     spawnRiftAction: ActionSpawnRift
   - type: GenericAntag
     rule: Dragon
+  - type: ActionGun
+    action: ActionDragonsBreath
+    gunProto: DragonsBreathGun
   - type: GuideHelp
     guides:
     - MinorAntagonists
 
+- type: entity
+  noSpawn: true
+  id: DragonsBreathGun
+  name: dragon's lung
+  description: For dragon's breathing
+  components:
+  - type: RechargeBasicEntityAmmo
+    rechargeCooldown: 5
+    rechargeSound:
+      path: /Audio/Animals/space_dragon_roar.ogg
+  - type: BasicEntityAmmoProvider
+    proto: ProjectileDragonsBreath
+    capacity: 1
+    count: 1
+  - type: Gun
+    soundGunshot:
+      path: /Audio/Animals/space_dragon_roar.ogg
+    soundEmpty: null
+    projectileSpeed: 5
+
 - type: entity
   parent: BaseMobDragon
   id: MobDragonDungeon
@@ -183,6 +212,7 @@
       state: icon
     event: !type:DragonSpawnRiftActionEvent
     useDelay: 1
+    priority: 3
 
 - type: entity
   id: ActionDevour
@@ -194,3 +224,18 @@
     icon: { sprite : Interface/Actions/devour.rsi, state: icon }
     iconOn: { sprite : Interface/Actions/devour.rsi, state: icon-on }
     event: !type:DevourActionEvent
+    priority: 1
+
+- type: entity
+  noSpawn: true
+  id: ActionDragonsBreath
+  name: "[color=orange]Dragon's Breath[/color]"
+  description: Spew out flames at anyone foolish enough to attack you!
+  components:
+  - type: WorldTargetAction
+    # TODO: actual sprite
+    icon: { sprite : Objects/Weapons/Guns/Projectiles/magic.rsi, state: fireball }
+    event: !type:ActionGunShootEvent
+    priority: 2
+    checkCanAccess: false
+    range: 0

Resources/Prototypes/Entities/Objects/Weapons/Guns/Projectiles/magic.yml

@@ -30,6 +30,39 @@
   - type: IgniteOnCollide
     fireStacks: 0.35
 
+- type: entity
+  noSpawn: true
+  parent: BaseBulletTrigger
+  id: ProjectileDragonsBreath
+  name: dragon's breath
+  description: Try not to get toasted.
+  components:
+  - type: PointLight
+    color: "#E25822"
+    radius: 3.0
+    energy: 5.0
+  - type: Sprite
+    sprite: Objects/Weapons/Guns/Projectiles/magic.rsi
+    layers:
+    - state: fireball
+      shader: unshaded
+  - type: IgnitionSource
+    temperature: 1000
+    ignited: true
+  - type: RepeatingTrigger
+    delay: 0.5 # line of fire as well as if it hits something
+  - type: ExplodeOnTrigger
+  - type: Explosive
+    explosionType: FireBomb
+    totalIntensity: 5 # low intensity, the point is to burn attackers not to break open walls, dragons can just eat them
+    intensitySlope: 1
+    maxIntensity: 3
+    canCreateVacuum: false
+    deleteAfterExplosion: false
+    repeatable: true
+  - type: TimedDespawn
+    lifetime: 5
+
 - type: entity
   id: ProjectileAnomalyFireball
   name: fireball