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extends CharacterBody3D
## Speed of enemy
@export var speed: float = 2.0
## Target for enemy to follow
@export var target: Node3D
## Whether to use gravity on enemy
@export var gravity_enabled: bool = true
## Use nav mesh or dumb path finding
@export var use_nav_mesh: bool = true
@onready var nav_agent: NavigationAgent3D = $NavigationAgent3D
var gravity : float = ProjectSettings.get_setting("physics/3d/default_gravity")
var original_material: StandardMaterial3D
@onready var red_material = preload("res://models/red_material.tres")
var mesh_ready = false
var found = false
func _ready() -> void:
if gravity_enabled:
motion_mode = MotionMode.MOTION_MODE_GROUNDED
NavigationServer3D.connect("map_changed", map_changed)
original_material = $MeshInstance3D.get_active_material(0)
func map_changed(_rid):
print("Map changed")
mesh_ready = true
func update_target_location(target_location: Vector3):
nav_agent.target_position = target_location
func chase_nav_mesh(delta: float):
if not mesh_ready:
return
if target != null:
update_target_location(target.global_position)
var current_location = global_transform.origin
var next_location = nav_agent.get_next_path_position()
var new_velocity = (next_location - current_location).normalized() * speed
#print("Target is ", next_location)
# We only want to navigate on XZ plane
new_velocity.y = 0
velocity = velocity.move_toward(new_velocity, .25)
if not is_on_floor() and gravity_enabled:
velocity.y -= gravity * delta
else:
velocity.y = 0
move_and_slide()
func wander() -> void:
pass
func _physics_process(delta: float) -> void:
if Input.is_action_pressed("ui_right"):
return
if target != null and not found and check_target_visible():
found = true
print("Found player")
if not found:
wander()
elif found:
chase_nav_mesh(delta)
func check_target_visible() -> bool:
var space_state = get_world_3d().direct_space_state
var starting_pos = global_position
var ending_pos = target.global_position + Vector3.UP
var query = PhysicsRayQueryParameters3D.create(starting_pos, ending_pos, 0xFFFFFFFF, [self.get_rid()])
var result = space_state.intersect_ray(query)
if result and result.collider == target:
return true
return false
func on_hit(_hit_position: Vector3) -> void:
if $HitTimer.is_stopped():
$MeshInstance3D.set_surface_override_material(0, red_material)
$HitTimer.start()
func _on_hit_timer_timeout() -> void:
$MeshInstance3D.set_surface_override_material(0, original_material)
$HitTimer.stop()
get_parent().remove_child(self)
queue_free()
func _on_body_entered(body: Node3D) -> void:
target = body
func _on_body_exited(body: Node3D) -> void:
if body == target and not found:
target = null
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