Entities

base/scenes/enemies/test_enemy.tscn

@@ -15,7 +15,7 @@
 [node name="RotationalSprite" type="Sprite3D" parent="."]
 billboard = 2
 texture_filter = 0
-texture = ExtResource("1_7qny8")
+texture = ExtResource("9_83myg")
 script = ExtResource("2_hmq60")
 rotations = Dictionary[float, Texture2D]({
 0.0: ExtResource("6_d1vpv"),

base/scripts/entity.gd

@@ -0,0 +1,88 @@
+extends Node3D
+
+## Base class for all hp-based objects
+class_name Entity
+
+## Maximum health points of an entity. Any heal cannot exceed this value
+@export var max_hp : float
+## Current amount of health points of an entity. Cannot be below 0 or [code]max_hp[/code]
+var hp : float = max_hp
+
+
+## Emitted when damage is taken
+signal damage_taken(context : DamageTakenContext)
+## Emitted when entity is healed
+signal healed(context : HealedContext)
+## Emitted on every health points change
+signal hp_changed(context : HPChangedContext)
+## Emitted when kill is requested
+signal killed(context : KilledContext)
+
+## Properly deal damage to entity
+func deal_damage(amount : float, source : Entity):
+	var context = DamageTakenContext.new()
+	context.source = source
+	context.target = self
+	context.amount = amount
+	damage_taken.emit(context)
+	
+	var delta_context = HPChangedContext.new()
+	delta_context.source = source
+	delta_context.target = self
+	delta_context.delta = -amount
+	hp_changed.emit(delta_context)
+	
+	hp -= amount
+	if hp <= 0:
+		hp = 0
+		kill(source)
+
+
+## Properly heal entity
+func heal(amount : float, source : Entity):
+	var context = HealedContext.new()
+	context.source = source
+	context.target = self
+	context.amount = amount
+	healed.emit(context)
+	
+	var delta_context = HPChangedContext.new()
+	delta_context.source = source
+	delta_context.target = self
+	delta_context.delta = amount
+	hp_changed.emit(delta_context)
+	
+	hp += amount
+	if hp > max_hp:
+		hp = max_hp
+
+
+## Invoked when an entity is killed by damage. 
+func kill(source : Entity):
+	var context = KilledContext.new()
+	context.source = source
+	context.target = self
+	killed.emit(context)
+	
+	deconstruct()
+
+
+## Method used to properly deconstruct entity
+func deconstruct():
+	queue_free()
+
+class DamageTakenContext:
+	var target : Entity
+	var source : Entity
+	var amount : float
+class HealedContext:
+	var target : Entity
+	var source : Entity
+	var amount : float
+class KilledContext:
+	var target : Entity
+	var source : Entity
+class HPChangedContext:
+	var target : Entity
+	var source : Entity
+	var delta : float

base/scripts/entity.gd.uid

@@ -0,0 +1 @@
+uid://7572s220f0rv