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https://github.com/Steffo99/swear-jar.git
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108 lines
3.6 KiB
GDScript
108 lines
3.6 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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## 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 collision mask of objects that should prevent this object's placement.
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@export_flags_2d_physics var collision_mask_prevent_placement: int
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## The collision mask of objects that should be deleted on this object's placement.
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@export_flags_2d_physics var collision_mask_delete_placement: int
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## The texture that the preview sprite should display.
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@export var preview_texture: Texture2D:
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get:
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return preview_texture
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set(value):
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preview_texture = value
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# Quick priority fix
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if preview_sprite:
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preview_sprite.texture = value
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## Whether the ghost can be placed at the current location of the ghost.
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##
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## Computed by checking if [placement_shape] overlaps any entity and is inside the [PlacementArea] of the [Bottle].
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var can_place: bool:
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get:
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return can_place
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set(value):
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if value:
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preview_sprite.modulate = Color(1.0, 1.0, 1.0, 0.5)
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else:
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preview_sprite.modulate = Color(1.0, 0.0, 0.0, 0.5)
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## The last input event of the input that's dragging the ghost around, or null if the ghost isn't being dragged.
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var last_input_event: InputEvent
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func _ready():
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collision_mask = collision_mask_prevent_placement | collision_mask_delete_placement
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preview_sprite.texture = preview_texture
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func _input(event: InputEvent):
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# Handle mouse click
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if event is InputEventMouseButton:
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last_input_event = event if event.pressed else null
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# Handle touch begin
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elif event is InputEventScreenTouch:
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last_input_event = event if event.pressed else null
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# If is dragging
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if last_input_event:
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# Handle mouse drag
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if last_input_event is InputEventMouse and event is InputEventMouse:
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var delta = event.position - last_input_event.position
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position += delta
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last_input_event = event
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# Handle touch drag
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elif (last_input_event is InputEventScreenTouch or last_input_event is InputEventScreenDrag) and event is InputEventScreenDrag:
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if event.index == last_input_event.index:
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var delta = event.position - last_input_event.position
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position += delta
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last_input_event = event
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# DIRTY HACK: Relies on the placeable area being perfectly surrounded by solid bodies.
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func _physics_process(_delta: float):
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var no_overlapping_bodies: bool = true
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var overlapping_bodies = get_overlapping_bodies()
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for body in overlapping_bodies:
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if body is TileMap:
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no_overlapping_bodies = false
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elif body is PhysicsBody2D:
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var body_prevents_placement = bool(body.collision_layer & collision_mask_prevent_placement)
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no_overlapping_bodies = no_overlapping_bodies and not body_prevents_placement
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var is_in_placeable_area: bool = false
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var overlapping_areas = get_overlapping_areas()
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for area in overlapping_areas:
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if area is PlaceableArea:
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is_in_placeable_area = true
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can_place = no_overlapping_bodies and is_in_placeable_area
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## The [PackedScene] that this node should instantiate.
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@export var scene_to_instantiate: PackedScene
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## The [Node] instatiated scenes should be added as children to.
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@export var target: Node
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## Emitted when the [materialize] function has finished executing.
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signal materialized(node: Node)
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func materialize():
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var instantiated = scene_to_instantiate.instantiate()
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instantiated.global_position = global_position
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instantiated.rotation = rotation
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target.add_child(instantiated)
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materialized.emit(instantiated)
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return instantiated
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