add shield buff property

src/ability.js

@@ -235,7 +235,7 @@ export default class Ability {
         const entityId = collidingEntity.id
 
         if (!collided.has(entityId)) {
-          collidingEntity.heal(amount, caster)
+          collidingEntity.applyBuff(Buff.shieldThrowShield.id, caster.id)
           collided.add(entityId)
         }
       }
@@ -252,8 +252,8 @@ export default class Ability {
       }
 
       const shieldThrowSecondAfter = function shieldThrowSecondAfter(projectile, homingTarget) {
-        caster.heal(amount, caster)
-        caster.heal(amount, caster) // NOTE: duplicated on purpose
+        caster.applyBuff(Buff.shieldThrowShield.id, caster.id)
+        caster.applyBuff(Buff.shieldThrowShield.id, caster.id) // NOTE: duplicated on purpose
       }
 
       const shieldThrowFirstAfter = function shieldThrowFirstAfter(projectile, homingTarget) {

src/buff.js

@@ -7,6 +7,7 @@ export default class Buff {
 
   damageMultiplier = null
   duration = 0
+  shield = null
 
   #effect = null
 
@@ -25,4 +26,11 @@ export default class Buff {
     duration: 4,
     onHitMultiplier: 3,
   })
+
+  static shieldThrowShield = new Buff({
+    id: 'shield_throw_shield',
+    name: 'Shield (of Shield Throw)',
+    duration: 5,
+    shield: 200,
+  })
 }

src/entity.js

@@ -28,21 +28,22 @@ export default class Entity {
   visionRange = 900
   visualRadius = null
 
-  #collision = true
-  #ghostable = true
   #attacking = false
   #bbox = new Float32Array(4)
   #colliders = []
-  #entitiesInVision = []
-  #projectilesInVision = []
-  #pathfindingCooldown = 0
-  #pathfindingObstacleLimit = null
+  #collision = true
   #dest = null
+  #entitiesInVision = []
   #game = null
+  #ghostable = true
   #logic = null
   #moving = false
-  #path = []
   #noPathfindingUntil = 0
+  #path = []
+  #pathfindingCooldown = 0
+  #pathfindingObstacleLimit = null
+  #projectilesInVision = []
+  #queuedAction = null
   #spawnPosition = new Vector2()
 
   static bbox(x, y, radius) {
@@ -177,7 +178,6 @@ export default class Entity {
     this.moveAction(cursor, true)
   }
 
-  // TODO: buffer skill inputs
   castAction(slot, cursor, halt = false) {
     if (this.dead) { return }
 
@@ -267,16 +267,27 @@ export default class Entity {
   }
 
   applyBuff(id, sourceId = null) {
+    const buff = (this.game?.buffs ?? []).find((it) => it.id, id)
+    if (buff == null) { return false }
+
     const index = this.buffs.findIndex((it) => it.id == id)
     const source = sourceId ?? this.id
     const timestamp = this.game?.currentTick ?? 0
 
-    if (index > -1) {
-      this.buffs[index].timestamp = timestamp
-      this.buffs[index].source = source
+    if (index < 0) {
+      const entityBuff = { id, source, timestamp }
+      if (buff.shield != null) {
+        entityBuff.shield = buff.shield
+      }
+
+      this.buffs.push(entityBuff)
     }
     else {
-      this.buffs.push({ id, source, timestamp })
+      this.buffs[index].timestamp = timestamp
+      this.buffs[index].source = source
+      if (buff.shield != null) {
+        this.buffs[index].shield = (this.buffs[index].shield ?? 0) + buff.shield
+      }
     }
   }
 
@@ -322,7 +333,6 @@ export default class Entity {
     return entitiesAndTerrains.filter((it) => !it.dead && it.collision && !((this.ghosting && it.ghostable) || (this.ghostable && it.ghosting)) && SATX.bboxCheck(bbox, it.bbox))
   }
 
-  // TODO: add shielding logic
   damage(amount, source = null) {
     if (this.dead) { return }
 
@@ -335,11 +345,22 @@ export default class Entity {
       }
     }
 
-    const damageMultiplerBuffs = (source?.buffs ?? []).map((it) => it.getBuff).filter((it) => it != null && it.damageMultiplier != null)
+    const buffs = (source?.buffs ?? [])
+    const damageMultiplerBuffs = buffs.map((it) => it.getBuff).filter((it) => it != null && it.damageMultiplier != null)
     const buffPassiveDamageMultiplier = damageMultiplerBuffs.reduce((it) => it.damageMultiplier - 1, 0)
 
     const damageMultipler = 1 + buffPassiveDamageMultiplier + customMultipliers
-    const damage = amount * damageMultipler
+    let damage = amount * damageMultipler
+
+    if (damage <= 0) {
+      buffs.filter((it) => it.shield != null && it.shield > 0).forEach((it) => {
+        if (damage <= 0) { return }
+
+        const shielded = Math.max(0, Math.min(damage, it.shield))
+        it.shield -= shielded
+        damage -= shielded
+      })
+    }
 
     this.health = Math.min(Math.max(0, this.health - damage), this.maxHealth)
   }

src/level.js

@@ -26,7 +26,6 @@ export class Dungeon {
     game.spawnEntity(new Entity(Template.player({ id: '2', spawnPosition: new Vector2(1500, 700), team, dead: true })))
 
     game.spawnEntity(new Entity(Template.basilisk({ id: 'boss', spawnPosition: new Vector2(2200, 750), team: Team.neutral })))
-    game.entities.find((it) => it.id == 'boss').damage(9999)
 
     game.start()
   }