71 lines
1.8 KiB
GDScript
71 lines
1.8 KiB
GDScript
class_name HomingMissileMotion
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extends Node
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@export var launch_component: LaunchComponent
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@export var root: Node2D
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@export var max_speed: float = 16.0
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@export var acceleration: float = 8.0
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@export var detection_area: Area2D
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@export var max_turn_rate: float = 180.0
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@export var wobble_strength := 5.0 # degrees
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@export var drag := 0.98
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@export var steering_lerp := 0.05 # low = sluggish
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var steering_direction: Vector2 = velocity.normalized()
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var target: Node2D = null
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var velocity: Vector2 = Vector2.ZERO
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func _ready() -> void:
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if not detection_area:
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printerr("No detection area assigned!")
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return
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if not launch_component:
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printerr("No launch component assigned!")
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return
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detection_area.body_entered.connect(on_detection_area_body_entered)
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velocity = launch_component.get_initial_velocity()
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func _physics_process(delta: float) -> void:
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if not launch_component or not root:
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return
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if not target:
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root.position += velocity * delta
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return
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var to_target := (target.global_position - root.global_position).normalized()
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steering_direction = steering_direction.lerp(to_target, steering_lerp)
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var angle_to_target := velocity.angle_to(steering_direction)
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var max_angle := deg_to_rad(max_turn_rate) * delta
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var clamped_angle = clamp(angle_to_target, - max_angle, max_angle)
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var wobble := deg_to_rad(randf_range(-wobble_strength, wobble_strength))
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clamped_angle += wobble
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velocity = velocity.rotated(clamped_angle)
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velocity *= drag
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var desired_speed = min(max_speed, velocity.length() + acceleration * delta)
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velocity = velocity.normalized() * desired_speed
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root.position += velocity * delta
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root.rotation = velocity.angle()
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func on_detection_area_body_entered(body: Node) -> void:
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if target != null:
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return
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if body == null:
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return
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target = body
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