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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 has_astar: bool = false
var astar: AStar3D
var tar_vec: Vector3
var gravity : float = ProjectSettings.get_setting("physics/3d/default_gravity")
var original_color: Color
var mesh_ready = false
func _ready() -> void:
if gravity_enabled:
motion_mode = MotionMode.MOTION_MODE_GROUNDED
NavigationServer3D.connect("map_changed", map_changed)
func map_changed(_rid):
print("Map changed")
mesh_ready = true
func chase_target(delta: float) -> void:
var target_pos = target.position
var direction = (target_pos - position).normalized()
if direction:
velocity.x = direction.x * speed
velocity.z = direction.z * speed
else:
velocity.x = move_toward(velocity.x, 0, speed)
velocity.z = move_toward(velocity.z, 0, speed)
if not is_on_floor() and gravity_enabled:
velocity.y -= gravity * delta
move_and_slide()
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 _physics_process(delta: float) -> void:
if target == null:
return
if Input.is_action_pressed("ui_right"):
return
if use_nav_mesh:
chase_nav_mesh(delta)
return
if not has_astar:
# Just try to chase player directly
chase_target(delta)
return
var target_pos = target.position
var closest_me = astar.get_closest_point(position)
var closest_target = astar.get_closest_point(target_pos)
var direction: Vector3
if closest_me == closest_target:
direction = (target_pos - position).normalized()
else:
var target_path = astar.get_point_path(closest_me, closest_target)
if len(target_path) >= 2:
direction = (target_path[1] - position).normalized()
if direction:
#velocity.x = move_toward(velocity.x, direction.x * speed, 10.0 * delta)
#velocity.z = move_toward(velocity.z, direction.z * speed, 10.0 * delta)
velocity.x = direction.x * speed
velocity.z = direction.z * speed
else:
velocity.x = move_toward(velocity.x, 0, speed)
velocity.z = move_toward(velocity.z, 0, speed)
move_and_slide()
func on_hit(_hit_position: Vector3) -> void:
if $HitTimer.is_stopped():
var material: StandardMaterial3D = $MeshInstance3D.get_active_material(0)
original_color = material.albedo_color
material.albedo_color = Color(1.0, 0.0, 0.0, 1.0)
$HitTimer.start()
func _on_level_generator_astar_created(in_astar: AStar3D) -> void:
astar = in_astar
has_astar = true
func _on_hit_timer_timeout() -> void:
var material: StandardMaterial3D = $MeshInstance3D.get_active_material(0)
material.albedo_color = original_color
$HitTimer.stop()
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