basic ECS spawner

GECS/components/c_health.gd

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+class_name C_Health
+extends Component
+
+@export var current: float = 100.0
+@export var maximum: float = 100.0
+
+func _init(max_health: float = 100.0):
+	maximum = max_health
+	current = max_health

GECS/components/c_health.gd.uid

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+uid://bg653v2p104l1

GECS/components/c_spawn_point.gd

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+class_name C_SpawnPoint
+extends Component
+
+@export var spawn_prefab: PackedScene
+@export var spawn_frequency: float = 1
+var spawn_cooldown: float = 0
+
+func _init():
+	pass
+	
+func should_spawn() -> bool:
+	return spawn_cooldown < 0
+	
+func start_spawn_cooldown() -> void:
+	spawn_cooldown = spawn_frequency

GECS/components/c_spawn_point.gd.uid

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+uid://cmflg422miab6

GECS/components/c_transform.gd

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+class_name C_Transform
+extends Component
+
+@export var position: Vector3 = Vector3.ZERO
+
+func _init(pos: Vector3 = Vector3.ZERO):
+	position = pos

GECS/components/c_transform.gd.uid

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+uid://c4ihfoefv2vwd

GECS/components/c_velocity.gd

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+class_name C_Velocity
+extends Component
+
+@export var velocity: Vector3 = Vector3.ZERO
+
+func _init(vel: Vector3 = Vector3.ZERO):
+	velocity = vel

GECS/components/c_velocity.gd.uid

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+uid://cnqotfu7xgxwa

GECS/entities/BasicEnemy/BasicEnemy.tscn

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+[gd_scene load_steps=11 format=3 uid="uid://bct6stmj0qyp2"]
+
+[ext_resource type="Script" uid="uid://ci3kmg1eck6gb" path="res://GECS/entities/BasicEnemy/e_basic_enemy.gd" id="1_h3v2l"]
+[ext_resource type="Script" uid="uid://b6k13gc2m4e5s" path="res://addons/gecs/ecs/component.gd" id="2_gsgoc"]
+[ext_resource type="Script" uid="uid://bg653v2p104l1" path="res://GECS/components/c_health.gd" id="3_unr0g"]
+[ext_resource type="Script" uid="uid://c4ihfoefv2vwd" path="res://GECS/components/c_transform.gd" id="4_07lse"]
+[ext_resource type="Script" uid="uid://cnqotfu7xgxwa" path="res://GECS/components/c_velocity.gd" id="5_vhe2b"]
+
+[sub_resource type="Resource" id="Resource_vas4o"]
+script = ExtResource("3_unr0g")
+metadata/_custom_type_script = "uid://bg653v2p104l1"
+
+[sub_resource type="Resource" id="Resource_yuljp"]
+script = ExtResource("4_07lse")
+metadata/_custom_type_script = "uid://c4ihfoefv2vwd"
+
+[sub_resource type="Resource" id="Resource_6hf1n"]
+script = ExtResource("5_vhe2b")
+velocity = Vector3(2, 0, 0)
+metadata/_custom_type_script = "uid://cnqotfu7xgxwa"
+
+[sub_resource type="CapsuleShape3D" id="CapsuleShape3D_ocib1"]
+
+[sub_resource type="CapsuleMesh" id="CapsuleMesh_4ju8b"]
+
+[node name="BasicEnemy" type="CharacterBody3D"]
+script = ExtResource("1_h3v2l")
+component_resources = Array[ExtResource("2_gsgoc")]([SubResource("Resource_vas4o"), SubResource("Resource_yuljp"), SubResource("Resource_6hf1n")])
+
+[node name="CollisionShape3D" type="CollisionShape3D" parent="."]
+transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 1, 0)
+shape = SubResource("CapsuleShape3D_ocib1")
+
+[node name="MeshInstance3D" type="MeshInstance3D" parent="."]
+transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 1, 0)
+mesh = SubResource("CapsuleMesh_4ju8b")

GECS/entities/BasicEnemy/e_basic_enemy.gd

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+@tool
+class_name BasicEnemy
+extends Entity
+
+
+func on_ready():
+	# Sync the entity's scene position to the Transform component
+	if has_component(C_Transform):
+		var c_trs = get_component(C_Transform) as C_Transform
+		self.global_position = c_trs.position

GECS/entities/BasicEnemy/e_basic_enemy.gd.uid

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+uid://ci3kmg1eck6gb

GECS/entities/Spawner/SpawnPoint.tscn

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+[gd_scene load_steps=7 format=3 uid="uid://d0075ch03hfri"]
+
+[ext_resource type="Script" uid="uid://ckqlc1tqyh7gm" path="res://GECS/entities/Spawner/e_spawn_point.gd" id="1_sp3sh"]
+[ext_resource type="Script" uid="uid://b6k13gc2m4e5s" path="res://addons/gecs/ecs/component.gd" id="2_ksqpe"]
+[ext_resource type="Script" uid="uid://cmflg422miab6" path="res://GECS/components/c_spawn_point.gd" id="3_ksqpe"]
+[ext_resource type="PackedScene" uid="uid://bct6stmj0qyp2" path="res://GECS/entities/BasicEnemy/BasicEnemy.tscn" id="4_2ixog"]
+
+[sub_resource type="Resource" id="Resource_dgltp"]
+script = ExtResource("3_ksqpe")
+spawn_prefab = ExtResource("4_2ixog")
+metadata/_custom_type_script = "uid://cmflg422miab6"
+
+[sub_resource type="SphereShape3D" id="SphereShape3D_sp3sh"]
+
+[node name="SpawnPoint" type="CharacterBody3D"]
+collision_layer = 0
+collision_mask = 0
+motion_mode = 1
+script = ExtResource("1_sp3sh")
+component_resources = Array[ExtResource("2_ksqpe")]([SubResource("Resource_dgltp")])
+
+[node name="Marker3D" type="Marker3D" parent="."]
+
+[node name="CollisionShape3D" type="CollisionShape3D" parent="."]
+shape = SubResource("SphereShape3D_sp3sh")

GECS/entities/Spawner/e_spawn_point.gd

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+@tool
+class_name E_SpawnPoint
+extends Entity
+
+@export var spawn_prefab: PackedScene
+@export var spawn_frequency: float = -1
+
+func on_ready():
+	if has_component(C_SpawnPoint):
+		var c_spawn_point = get_component(C_SpawnPoint) as C_SpawnPoint
+		if spawn_prefab != null && spawn_prefab.can_instantiate():
+			c_spawn_point.spawn_prefab = spawn_prefab
+		if spawn_frequency > 0:
+			c_spawn_point.spawn_frequency = spawn_frequency

GECS/entities/Spawner/e_spawn_point.gd.uid

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+uid://ckqlc1tqyh7gm

GECS/systems/default_systems.tscn

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+[gd_scene load_steps=4 format=3 uid="uid://b2v1bngfh5te"]
+
+[ext_resource type="Script" uid="uid://b3vi2ingux88g" path="res://addons/gecs/lib/system_group.gd" id="1_sk1vy"]
+[ext_resource type="Script" uid="uid://dpglt5gt5ijrn" path="res://GECS/systems/s_movement.gd" id="2_aqda8"]
+[ext_resource type="Script" uid="uid://cb2kev6dsctfu" path="res://GECS/systems/s_spawner.gd" id="2_hdbau"]
+
+[node name="Systems" type="Node"]
+
+[node name="gameplay" type="Node" parent="."]
+script = ExtResource("1_sk1vy")
+metadata/_custom_type_script = "uid://b3vi2ingux88g"
+
+[node name="SpawnSystem" type="Node" parent="gameplay"]
+script = ExtResource("2_hdbau")
+group = &"gameplay"
+metadata/_custom_type_script = "uid://cb2kev6dsctfu"
+
+[node name="physics" type="Node" parent="."]
+script = ExtResource("1_sk1vy")
+metadata/_custom_type_script = "uid://b3vi2ingux88g"
+
+[node name="MovementSystem" type="Node" parent="physics"]
+script = ExtResource("2_aqda8")
+group = &"physics"
+metadata/_custom_type_script = "uid://dpglt5gt5ijrn"

GECS/systems/s_movement.gd

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+class_name MovementSystem
+extends System
+
+func query():
+	# Find all entities that have both transform and velocity
+	return q.with_all([C_Velocity])
+
+func process(entities: Array[Entity], _components: Array, delta: float):
+	for entity in entities:
+		var c_velocity = entity.get_component(C_Velocity) as C_Velocity
+		
+		if entity.velocity.length() == 0:
+			entity.velocity = c_velocity.velocity
+			
+		# Add the gravity.
+		if not entity.is_on_floor():
+			entity.velocity += entity.get_gravity() * delta
+			
+		# Bounce off screen edges (simple example)
+		if entity.global_position.x > 10 && entity.velocity.x > 0:
+			entity.velocity = -c_velocity.velocity
+		if  entity.global_position.x < -10 && entity.velocity.x < 0:
+			entity.velocity = c_velocity.velocity
+			
+		entity.move_and_slide()

GECS/systems/s_movement.gd.uid

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+uid://dpglt5gt5ijrn

GECS/systems/s_spawner.gd

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+class_name SpawnSystem
+extends System
+
+func query():
+	# Find all entities that have both transform and velocity
+	return q.with_all([C_SpawnPoint]).enabled()
+
+func process(entities: Array[Entity], _components: Array, delta: float):
+	for entity in entities:
+		var spawn_point = entity.get_component(C_SpawnPoint) as C_SpawnPoint
+		
+		if not spawn_point.should_spawn():
+			spawn_point.spawn_cooldown -= delta
+			continue
+			
+		var spawned = spawn_point.spawn_prefab.instantiate() as Entity
+		get_tree().current_scene.add_child(spawned)
+		ECS.world.add_entity(spawned)
+		
+		spawned.global_position = entity.global_position
+		spawn_point.start_spawn_cooldown()

GECS/systems/s_spawner.gd.uid

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+uid://cb2kev6dsctfu