| name | godot-enemies |
| description | Enemy AI, spawn systems, boss patterns, and pathfinding for Godot 4.
Use when creating enemies, wave systems, AI behavior, or boss fights.
Contains complete scripts for chase, patrol, ranged, and boss enemies.
All enemies include layered procedural visuals (not flat shapes).
|
Enemy Systems
Visual Standard
Every enemy MUST have a visual component. Never ship enemies as bare collision shapes.
Enemy Visual Pattern (procedural)
# enemy_visual.gd — attach to Node2D child named "Visual" inside enemy
extends Node2D
@export var body_color := Color(0.9, 0.15, 0.15)
@export var outline_color := Color(0.5, 0.05, 0.05)
@export var size := 12.0
@export var enemy_type := "chase" # chase|patrol|ranged|boss
var _time := 0.0
func _process(delta):
_time += delta
queue_redraw()
func _draw():
var pulse = 1.0 + sin(_time * 3.0) * 0.04
# Danger glow
draw_circle(Vector2.ZERO, size * 1.4 * pulse, Color(body_color.r, body_color.g, body_color.b, 0.07))
# Shadow
draw_circle(Vector2(1, 2), size * pulse, Color(0, 0, 0, 0.25))
# Body varies by type
match enemy_type:
"chase":
_draw_chase_body(pulse)
"patrol":
_draw_patrol_body(pulse)
"ranged":
_draw_ranged_body(pulse)
"boss":
_draw_boss_body(pulse)
_:
_draw_chase_body(pulse)
func _draw_chase_body(pulse: float):
# Spiky star shape — aggressive
var points = PackedVector2Array()
for i in range(6):
var angle = i * TAU / 6.0 - PI / 2.0
var r = size * pulse * (1.0 if i % 2 == 0 else 0.55)
points.append(Vector2(cos(angle), sin(angle)) * r)
draw_colored_polygon(points, body_color)
# Core
draw_circle(Vector2.ZERO, size * 0.35, body_color.lightened(0.3))
# Eyes
_draw_angry_eyes(size * 0.6)
# Outline
draw_polyline(points + PackedVector2Array([points[0]]), outline_color, 1.5, true)
func _draw_patrol_body(pulse: float):
# Rounded rectangle — cautious/defensive
var w = size * 1.2 * pulse
var h = size * 0.9 * pulse
var rect = Rect2(-w, -h, w * 2, h * 2)
draw_rect(rect, body_color, true)
draw_rect(rect, outline_color, false, 1.5)
# Highlight
draw_rect(Rect2(-w + 2, -h + 2, w * 0.6, h * 0.5), body_color.lightened(0.2), true)
_draw_neutral_eyes(size * 0.6)
func _draw_ranged_body(pulse: float):
# Diamond shape — precise/dangerous
var s = size * pulse
var pts = PackedVector2Array([
Vector2(0, -s * 1.2), Vector2(s * 0.8, 0),
Vector2(0, s * 0.8), Vector2(-s * 0.8, 0)
])
draw_colored_polygon(pts, body_color)
draw_polyline(pts + PackedVector2Array([pts[0]]), outline_color, 1.5, true)
draw_circle(Vector2.ZERO, size * 0.3, body_color.lightened(0.3))
_draw_angry_eyes(size * 0.5)
func _draw_boss_body(pulse: float):
# Large crown shape — imposing
var points = PackedVector2Array()
for i in range(10):
var angle = i * TAU / 10.0 - PI / 2.0
var r = size * pulse * (1.0 if i % 2 == 0 else 0.65)
points.append(Vector2(cos(angle), sin(angle)) * r)
draw_colored_polygon(points, body_color)
draw_circle(Vector2.ZERO, size * 0.4, body_color.lightened(0.25))
draw_circle(Vector2.ZERO, size * 0.2, Color(1, 1, 1, 0.2))
# Single menacing eye
draw_ellipse(Rect2(-size * 0.2, -size * 0.3, size * 0.4, size * 0.55), Color.WHITE)
draw_circle(Vector2(0, -size * 0.05), size * 0.12, Color(0.1, 0, 0))
draw_polyline(points + PackedVector2Array([points[0]]), outline_color, 2.0, true)
func _draw_angry_eyes(spread: float):
draw_circle(Vector2(-spread * 0.3, -spread * 0.15), size * 0.18, Color.WHITE)
draw_circle(Vector2(spread * 0.3, -spread * 0.15), size * 0.18, Color.WHITE)
draw_circle(Vector2(-spread * 0.25, -spread * 0.1), size * 0.09, Color(0.1, 0, 0))
draw_circle(Vector2(spread * 0.35, -spread * 0.1), size * 0.09, Color(0.1, 0, 0))
# Angry brows
draw_line(Vector2(-spread * 0.5, -spread * 0.4), Vector2(-spread * 0.1, -spread * 0.25), outline_color, 1.5)
draw_line(Vector2(spread * 0.5, -spread * 0.4), Vector2(spread * 0.1, -spread * 0.25), outline_color, 1.5)
func _draw_neutral_eyes(spread: float):
draw_circle(Vector2(-spread * 0.3, -spread * 0.1), size * 0.15, Color.WHITE)
draw_circle(Vector2(spread * 0.3, -spread * 0.1), size * 0.15, Color.WHITE)
draw_circle(Vector2(-spread * 0.28, -spread * 0.08), size * 0.08, Color(0.15, 0, 0))
draw_circle(Vector2(spread * 0.32, -spread * 0.08), size * 0.08, Color(0.15, 0, 0))
func draw_ellipse(rect: Rect2, color: Color):
# Approximate ellipse with polygon
var cx = rect.position.x + rect.size.x / 2.0
var cy = rect.position.y + rect.size.y / 2.0
var rx = rect.size.x / 2.0
var ry = rect.size.y / 2.0
var pts = PackedVector2Array()
for i in range(16):
var a = i * TAU / 16.0
pts.append(Vector2(cx + cos(a) * rx, cy + sin(a) * ry))
draw_colored_polygon(pts, color)
Adding Visual to Enemies
func _setup_visual(type: String = "chase", color: Color = Color(0.9, 0.15, 0.15)):
if ResourceLoader.exists("res://assets/sprites/enemy_%s.png" % type):
var sprite = Sprite2D.new()
sprite.name = "Visual"
sprite.texture = load("res://assets/sprites/enemy_%s.png" % type)
add_child(sprite)
else:
var visual = Node2D.new()
visual.name = "Visual"
var script_path = "res://scripts/enemies/enemy_visual.gd"
if ResourceLoader.exists(script_path):
visual.set_script(load(script_path))
visual.set("body_color", color)
visual.set("enemy_type", type)
add_child(visual)
Chase Enemy (simplest)
extends CharacterBody2D
const SPEED := 90.0
var _player: Node2D
func _ready():
add_to_group("enemies")
_setup_visual("chase", Color(0.9, 0.15, 0.15))
var shape = CollisionShape2D.new()
var circle = CircleShape2D.new()
circle.radius = 10.0
shape.shape = circle
add_child(shape)
func _physics_process(_delta):
if not is_instance_valid(_player):
_player = get_tree().get_first_node_in_group("player")
if _player:
velocity = global_position.direction_to(_player.global_position) * SPEED
move_and_slide()
if global_position.distance_to(_player.global_position) < 20.0:
_attack_player()
func _attack_player():
var main = get_tree().current_scene
if main.has_method("take_damage"):
main.take_damage(10)
queue_free()
func take_damage(amount: int):
# Flash white on hit
if has_node("Visual"):
$Visual.modulate = Color(3, 3, 3, 1)
var tw = $Visual.create_tween()
tw.tween_property($Visual, "modulate", Color.WHITE, 0.08)
queue_free()
func _setup_visual(type: String, color: Color):
if ResourceLoader.exists("res://assets/sprites/enemy_chase.png"):
var sprite = Sprite2D.new()
sprite.name = "Visual"
sprite.texture = load("res://assets/sprites/enemy_chase.png")
add_child(sprite)
else:
var visual = Node2D.new()
visual.name = "Visual"
if ResourceLoader.exists("res://scripts/enemies/enemy_visual.gd"):
visual.set_script(load("res://scripts/enemies/enemy_visual.gd"))
visual.set("body_color", color)
visual.set("enemy_type", type)
add_child(visual)
Patrol Enemy (back and forth)
extends CharacterBody2D
const SPEED := 60.0
@export var patrol_distance := 100.0
var _start_pos: Vector2
var _direction := 1.0
var _player: Node2D
var _aggro_range := 200.0
func _ready():
add_to_group("enemies")
_start_pos = global_position
_setup_visual("patrol", Color(0.85, 0.5, 0.1))
func _physics_process(_delta):
_player = get_tree().get_first_node_in_group("player")
if _player and global_position.distance_to(_player.global_position) < _aggro_range:
velocity = global_position.direction_to(_player.global_position) * SPEED * 1.5
else:
velocity.x = _direction * SPEED
velocity.y = 0
if absf(global_position.x - _start_pos.x) > patrol_distance:
_direction *= -1
# Flip visual
if has_node("Visual") and velocity.x != 0:
$Visual.scale.x = signf(velocity.x) * absf($Visual.scale.x)
move_and_slide()
func take_damage(amount: int):
if has_node("Visual"):
$Visual.modulate = Color(3, 3, 3, 1)
var tw = $Visual.create_tween()
tw.tween_property($Visual, "modulate", Color.WHITE, 0.08)
queue_free()
func _setup_visual(type: String, color: Color):
var visual = Node2D.new()
visual.name = "Visual"
if ResourceLoader.exists("res://scripts/enemies/enemy_visual.gd"):
visual.set_script(load("res://scripts/enemies/enemy_visual.gd"))
visual.set("body_color", color)
visual.set("enemy_type", type)
add_child(visual)
Ranged Enemy (shoots at player)
extends CharacterBody2D
const SPEED := 50.0
const PREFERRED_DISTANCE := 200.0
var _shoot_cooldown := 0.0
func _ready():
add_to_group("enemies")
_setup_visual("ranged", Color(0.8, 0.2, 0.6))
func _physics_process(delta):
var player = get_tree().get_first_node_in_group("player")
if not player:
return
var dist = global_position.distance_to(player.global_position)
var dir = global_position.direction_to(player.global_position)
if dist > PREFERRED_DISTANCE + 30:
velocity = dir * SPEED
elif dist < PREFERRED_DISTANCE - 30:
velocity = -dir * SPEED
else:
velocity = Vector2.ZERO
move_and_slide()
_shoot_cooldown -= delta
if _shoot_cooldown <= 0.0 and dist < 400:
_shoot(dir)
_shoot_cooldown = 1.5
func _shoot(dir: Vector2):
var bullet = load("res://scenes/EnemyBullet.tscn").instantiate()
bullet.global_position = global_position
bullet.direction = dir
get_tree().current_scene.add_child(bullet)
func take_damage(_amount: int):
if has_node("Visual"):
$Visual.modulate = Color(3, 3, 3, 1)
var tw = $Visual.create_tween()
tw.tween_property($Visual, "modulate", Color.WHITE, 0.08)
queue_free()
func _setup_visual(type: String, color: Color):
var visual = Node2D.new()
visual.name = "Visual"
if ResourceLoader.exists("res://scripts/enemies/enemy_visual.gd"):
visual.set_script(load("res://scripts/enemies/enemy_visual.gd"))
visual.set("body_color", color)
visual.set("enemy_type", type)
add_child(visual)
Boss Enemy (phases + patterns)
extends CharacterBody2D
enum Phase { CHASE, SHOOT, DASH, VULNERABLE }
var phase := Phase.CHASE
var health := 300
var _phase_timer := 0.0
func _ready():
add_to_group("enemies")
add_to_group("bosses")
_setup_visual("boss", Color(0.8, 0.1, 0.7))
func _physics_process(delta):
_phase_timer -= delta
var player = get_tree().get_first_node_in_group("player")
if not player:
return
match phase:
Phase.CHASE:
velocity = global_position.direction_to(player.global_position) * 120.0
if _phase_timer <= 0:
_switch_phase(Phase.SHOOT)
Phase.SHOOT:
velocity = Vector2.ZERO
_shoot_pattern(player)
if _phase_timer <= 0:
_switch_phase(Phase.DASH)
Phase.DASH:
velocity = global_position.direction_to(player.global_position) * 400.0
if _phase_timer <= 0:
_switch_phase(Phase.VULNERABLE)
Phase.VULNERABLE:
velocity = Vector2.ZERO
if has_node("Visual"):
$Visual.modulate.a = 0.5 + sin(Time.get_ticks_msec() * 0.01) * 0.5
if _phase_timer <= 0:
if has_node("Visual"):
$Visual.modulate.a = 1.0
_switch_phase(Phase.CHASE)
move_and_slide()
func _switch_phase(new_phase: Phase):
phase = new_phase
match new_phase:
Phase.CHASE: _phase_timer = 3.0
Phase.SHOOT: _phase_timer = 2.0
Phase.DASH: _phase_timer = 0.5
Phase.VULNERABLE: _phase_timer = 2.0
func _shoot_pattern(target: Node2D):
if Engine.get_physics_frames() % 30 == 0:
for i in range(8):
var angle = i * TAU / 8
var dir = Vector2.from_angle(angle)
var bullet = load("res://scenes/EnemyBullet.tscn").instantiate()
bullet.global_position = global_position
bullet.direction = dir
get_tree().current_scene.add_child(bullet)
func take_damage(amount: int):
if phase != Phase.VULNERABLE:
amount = int(amount * 0.2)
health -= amount
# Flash hit
if has_node("Visual"):
$Visual.modulate = Color(3, 3, 3, 1)
var tw = $Visual.create_tween()
tw.tween_property($Visual, "modulate", Color.WHITE, 0.1)
if health <= 0:
var main = get_tree().current_scene
if main.has_method("add_score"):
main.add_score(1000)
queue_free()
func _setup_visual(type: String, color: Color):
var visual = Node2D.new()
visual.name = "Visual"
visual.scale = Vector2(2, 2) # Boss is bigger
if ResourceLoader.exists("res://scripts/enemies/enemy_visual.gd"):
visual.set_script(load("res://scripts/enemies/enemy_visual.gd"))
visual.set("body_color", color)
visual.set("enemy_type", type)
visual.set("size", 18.0)
add_child(visual)
Spawn System
# In main.gd or spawn_manager.gd
var _enemy_scene = null
var _wave := 0
var _enemies_per_wave := 3
func _ready():
_enemy_scene = load("res://scenes/Enemy.tscn")
$SpawnTimer.timeout.connect(_on_spawn_timer)
func _on_spawn_timer():
var enemies_alive = get_tree().get_nodes_in_group("enemies").size()
if enemies_alive > 15:
return
var player = get_tree().get_first_node_in_group("player")
if not player:
return
for i in range(_enemies_per_wave):
var enemy = _enemy_scene.instantiate()
var angle = randf() * TAU
var dist = randf_range(400, 600)
enemy.global_position = player.global_position + Vector2.from_angle(angle) * dist
# Spawn with animation
enemy.scale = Vector2.ZERO
enemy.modulate.a = 0.0
add_child(enemy)
var tw = enemy.create_tween()
tw.set_parallel(true)
tw.tween_property(enemy, "scale", Vector2.ONE, 0.3).set_ease(Tween.EASE_OUT).set_trans(Tween.TRANS_BACK)
tw.tween_property(enemy, "modulate:a", 1.0, 0.2)
_wave += 1
_enemies_per_wave = mini(_wave + 3, 10)
Wave System (structured)
var waves := [
{"count": 3, "types": ["chase"], "delay": 2.0},
{"count": 5, "types": ["chase", "patrol"], "delay": 1.5},
{"count": 4, "types": ["chase", "ranged"], "delay": 1.5},
{"count": 1, "types": ["boss"], "delay": 0.0},
]
var current_wave := 0
func start_wave():
if current_wave >= waves.size():
return
var wave = waves[current_wave]
for i in range(wave.count):
await get_tree().create_timer(wave.delay).timeout
_spawn_enemy(wave.types.pick_random())
current_wave += 1
func _spawn_enemy(type: String):
var path = "res://scenes/enemies/%s.tscn" % type
var scene = load(path)
if scene:
var enemy = scene.instantiate()
enemy.global_position = _random_edge_position()
# Spawn animation
enemy.scale = Vector2.ZERO
add_child(enemy)
var tw = enemy.create_tween()
tw.tween_property(enemy, "scale", Vector2.ONE, 0.3).set_ease(Tween.EASE_OUT).set_trans(Tween.TRANS_BACK)
Enemy Bullet (Area2D)
extends Area2D
# Layer 5 (enemy projectiles), Mask 1 (player)
var direction := Vector2.RIGHT
var speed := 200.0
func _ready():
body_entered.connect(_on_hit)
get_tree().create_timer(4.0).timeout.connect(queue_free)
# Trail
var trail = Line2D.new()
trail.name = "Trail"
trail.width = 2.0
trail.top_level = true
trail.z_index = -1
var grad = Gradient.new()
grad.set_color(0, Color(1, 0.4, 0, 0))
grad.set_color(1, Color(1, 0.4, 0, 0.5))
trail.gradient = grad
add_child(trail)
func _physics_process(delta):
position += direction * speed * delta
if has_node("Trail"):
$Trail.add_point(global_position)
while $Trail.get_point_count() > 8:
$Trail.remove_point(0)
func _on_hit(body):
if body.is_in_group("player"):
var main = get_tree().current_scene
if main.has_method("take_damage"):
main.take_damage(15)
queue_free()
