Initial commit

addons/world_brush/world_brush_lod_instance.gd

@@ -0,0 +1,124 @@
+@tool
+extends Node3D
+
+
+@export_range(1.0, 100000.0, 1.0, "or_greater")
+var medium_distance: float = 25.0
+
+@export_range(2.0, 100000.0, 1.0, "or_greater")
+var distant_distance: float = 60.0
+
+@export_range(0.0, 100000.0, 1.0, "or_greater")
+var cull_distance: float = 0.0
+
+var _elapsed: float = 0.0
+var _active_level: int = -2
+
+
+func _ready() -> void:
+	if Engine.is_editor_hint():
+		show_editor_preview()
+		set_process(false)
+		return
+
+	set_process(true)
+	_update_from_camera()
+
+
+func _process(delta: float) -> void:
+	_elapsed += delta
+	if _elapsed < 0.15:
+		return
+
+	_elapsed = 0.0
+	_update_from_camera()
+
+
+func configure(
+	new_medium_distance: float,
+	new_distant_distance: float,
+	new_cull_distance: float
+) -> void:
+	medium_distance = maxf(new_medium_distance, 1.0)
+	distant_distance = maxf(
+		new_distant_distance,
+		medium_distance + 1.0
+	)
+	cull_distance = maxf(new_cull_distance, 0.0)
+	show_editor_preview()
+
+
+func show_editor_preview() -> void:
+	_active_level = -2
+	_set_active_level(0)
+
+
+func update_for_distance(distance: float) -> void:
+	var near_level := get_node_or_null(^"Near") as Node3D
+	var medium_level := get_node_or_null(^"Medium") as Node3D
+	var distant_level := get_node_or_null(^"Distant") as Node3D
+	var target_level := 0
+
+	if cull_distance > 0.0 and distance >= cull_distance:
+		target_level = -1
+	elif distant_level != null and distance >= distant_distance:
+		target_level = 2
+	elif medium_level != null and distance >= medium_distance:
+		target_level = 1
+	elif near_level == null:
+		if medium_level != null:
+			target_level = 1
+		elif distant_level != null:
+			target_level = 2
+		else:
+			target_level = -1
+
+	_set_active_level(target_level)
+
+
+func _update_from_camera() -> void:
+	var viewport := get_viewport()
+	if viewport == null:
+		return
+
+	var camera := viewport.get_camera_3d()
+	if camera == null:
+		return
+
+	update_for_distance(
+		camera.global_position.distance_to(global_position)
+	)
+
+
+func _set_active_level(level: int) -> void:
+	if bool(get_meta("harvest_hidden", false)):
+		_active_level = -2
+		_set_level_visible(^"Near", false)
+		_set_level_visible(^"Medium", false)
+		_set_level_visible(^"Distant", false)
+		return
+
+	if level == _active_level:
+		return
+
+	_active_level = level
+	_set_level_visible(^"Near", level == 0)
+	_set_level_visible(^"Medium", level == 1)
+	_set_level_visible(^"Distant", level == 2)
+
+
+func set_harvest_hidden(hidden: bool) -> void:
+	set_meta("harvest_hidden", hidden)
+	_active_level = -2
+	if hidden:
+		_set_level_visible(^"Near", false)
+		_set_level_visible(^"Medium", false)
+		_set_level_visible(^"Distant", false)
+	else:
+		_update_from_camera()
+
+
+func _set_level_visible(path: NodePath, level_visible: bool) -> void:
+	var level := get_node_or_null(path) as Node3D
+	if level != null:
+		level.visible = level_visible