104 lines
3.1 KiB
GDScript
104 lines
3.1 KiB
GDScript
extends "res://objects/enemy/enemy.gd"
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enum State {SWIMMING, FALLING, TRANSITION}
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# whether the squid should start in falling state
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export var start_falling: bool = false
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export var speed: float = 50.0
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export var damping: float = 0.9
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export var delay: float = 1.0
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# margin of screen hitbox is disabled in
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export var hitbox_clip: Rect2 = Rect2(0.0, 0.0, 7.0, 7.0)
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export var full_clip: Rect2 = Rect2(-4.0, -4.0, 16.0, 16.0)
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var velocity: Vector2 = Vector2.ZERO
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# start of the sector it is trapped in
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var home_sector: Vector2 = Vector2.ZERO
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var _can_transition: bool = true
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onready var current_state: int = State.SWIMMING
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onready var hitbox_shape: CollisionShape2D = $"%HitboxShape"
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onready var animation_player: AnimationPlayer = $AnimationPlayer
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func _ready() -> void:
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if start_falling:
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_start_falling()
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else:
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_start_swimming()
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home_sector = Game.get_sector(global_position)
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func _physics_process(delta: float) -> void:
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if Game.current_sector != home_sector:
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hitbox_shape.disabled = true
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return
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# process movement and apply damping
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velocity.y *= pow(damping, delta)
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if current_state == State.FALLING:
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velocity.y = speed
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global_position += velocity * delta
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var sector_rect = Rect2(home_sector * Game.RESOLUTION, Game.RESOLUTION)
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# disable hitbox at edge of screen
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var global_hitbox_clip = hitbox_clip
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global_hitbox_clip.position += global_position
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if sector_rect.encloses(global_hitbox_clip):
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hitbox_shape.disabled = false
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else:
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hitbox_shape.disabled = true
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# check if out of sector
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var global_full_clip = full_clip
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global_full_clip.position += global_position
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if not sector_rect.intersects(global_full_clip) and _can_transition:
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match current_state:
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State.SWIMMING:
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current_state = State.TRANSITION
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_can_transition = false
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velocity = Vector2.ZERO
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var tween = create_tween()
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tween.tween_interval(delay)
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tween.tween_callback(self, "_start_falling")
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State.FALLING:
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current_state = State.TRANSITION
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_can_transition = false
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velocity = Vector2.ZERO
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var tween = create_tween()
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tween.tween_interval(delay)
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tween.tween_callback(self, "_start_swimming")
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State.TRANSITION:
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pass
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# clip to inside of home sector
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var rid = get_canvas_item()
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var rect = Rect2(to_local(home_sector * Game.RESOLUTION), Game.RESOLUTION)
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VisualServer.canvas_item_set_custom_rect(rid, true, rect)
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VisualServer.canvas_item_set_clip(rid, true)
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# give a burst of speed
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func _propel() -> void:
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velocity.y = -speed
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func _start_falling() -> void:
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if not _can_transition:
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var player = get_tree().get_nodes_in_group("player").pop_back()
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if player != null:
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global_position.x = player.global_position.x - 3.0
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animation_player.play("falling")
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current_state = State.FALLING
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yield(create_tween().tween_interval(1.0), "finished")
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_can_transition = true
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func _start_swimming() -> void:
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if not _can_transition:
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var player = get_tree().get_nodes_in_group("player").pop_back()
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if player != null:
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global_position.x = player.global_position.x - 3.0
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animation_player.play("swimming")
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current_state = State.SWIMMING
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yield(create_tween().tween_interval(1.0), "finished")
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_can_transition = true
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