mirror of
https://github.com/Steffo99/swear-jar.git
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131 lines
4.5 KiB
GDScript
131 lines
4.5 KiB
GDScript
extends Area2D
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class_name Ghost
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## Ghost previewing the instantiation of a scene.
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## Color to modulate this with if the body currently isn't overlapping anything.
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@export var valid_color: Color = Color.WHITE
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## Color to modulate this with if the body currently is overlapping something.
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@export var invalid_color: Color = Color.RED
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## The [Instantiator] to use to spawn the ghosted item.
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@onready var instantiator: Instantiator = $Instantiator
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## The [OverlapChecker] to use to see if a solid block is overlapping the ghost.
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@onready var overlap_checker: OverlapChecker = $OverlapChecker
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## The [PlaceableAreaChecker] to use to see if the ghost is currently inside the placeable area.
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@onready var placeable_area_checker: PlaceableAreaChecker = $PlaceableAreaChecker
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## The [OverlapFreer] to use to delete the [PhysicsBody2D] behind the ghost before instantiation.
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@onready var overlap_freer: OverlapFreer = $OverlapFreer
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## The [CollisionShape2D] to use to check for placement checks.
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##
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## MUST consist of a [RectangleShape2D].
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@onready var placement_shape: CollisionShape2D = $PlacementShape
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## The [Sprite2D] node previewing the scene.
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@onready var preview_sprite: Sprite2D = $PlacementShape/PreviewSprite
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## The position the ghost should have when a new body starts being placed.
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@onready var starting_position: Vector2 = position
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## The rotation the ghost should have when a new body starts being placed.
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@onready var starting_rotation_radians: float = rotation
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## Whether this object can currently be placed.
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var can_place: bool = false:
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get:
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return can_place
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set(value):
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if value != can_place:
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can_place_changed.emit(value)
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can_place = value
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modulate = valid_color if value else invalid_color
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## Emitted when [can_place] changes value.
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signal can_place_changed(to: bool)
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func _ready():
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# Initialize the Area's collision mask
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collision_mask = overlap_checker.overlap_mask | placeable_area_checker.overlap_mask | overlap_freer.overlap_mask
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## Update the value of [can_place].
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func update_state():
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# DIRTY HACK: Relies on the placeable area being perfectly surrounded by solid bodies.
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can_place = overlap_checker.is_overlapping_with == null and placeable_area_checker.is_overlapping_with != null
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## For retro-compatibility, configure this for the placement of a [PurchasableItem].
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func COMPAT_set_to_purchasable_item(pi: PurchasableItem):
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push_warning("COMPAT_set_to_purchasable_item is deprecated.")
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instantiator.scene_to_instantiate = pi.item_scene
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var item_scene = pi.item_scene.instantiate()
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placement_shape.shape = item_scene.get_node("PlacementObstruction/ShieldConverterObstructionShape").shape
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placement_shape.scale = item_scene.scale
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item_scene.queue_free()
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preview_sprite.texture = pi.item_icon
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position = starting_position
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rotation = starting_rotation_radians
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update_state()
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## Configure this for the placement of a [ShopItem].
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func set_to_shop_item(si: ShopItem):
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instantiator.scene_to_instantiate = si.placement_scene
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placement_shape.shape = si.placement_shape # TODO: Hmmm. Not the best interface.
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placement_shape.scale = si.placement_scene.scale
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preview_sprite.texture = si.placement_texture
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position = starting_position
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rotation = starting_rotation_radians
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update_state()
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## Emitted when [materialize] is called.
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signal materialized(what: Node)
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## Try to materialize the scene, returning it if the instantiation was successful, or null if it wasn't.
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##
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## Remember to try the placement again if this returns null!
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func materialize() -> Node:
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if not can_place:
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return null
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overlap_freer.update_is_overlapping_with()
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overlap_freer.area_queue_free()
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var inst = instantiator.instantiate()
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materialized.emit(inst)
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return inst
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func _on_moved(_from, _to):
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overlap_checker.update_is_overlapping_with()
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overlap_freer.update_is_overlapping_with()
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placeable_area_checker.update_is_overlapping_with()
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update_state()
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func _on_rotated_radians(_from, _to):
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overlap_checker.update_is_overlapping_with()
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overlap_freer.update_is_overlapping_with()
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placeable_area_checker.update_is_overlapping_with()
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update_state()
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func _on_area_entered(_area):
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placeable_area_checker.update_is_overlapping_with()
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update_state()
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func _on_area_exited(_area):
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placeable_area_checker.update_is_overlapping_with()
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update_state()
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func _on_body_entered(_body):
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overlap_checker.update_is_overlapping_with()
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overlap_freer.update_is_overlapping_with()
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update_state()
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func _on_body_exited(_body):
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overlap_checker.update_is_overlapping_with()
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overlap_freer.update_is_overlapping_with()
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update_state()
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