@tool
extends Sprite3D


@export var rotations : Dictionary[float,Texture2D]

func _process(delta: float) -> void:
	var camera = get_viewport().get_camera_3d()
	if Engine.is_editor_hint():
		camera = EditorInterface.get_editor_viewport_3d().get_camera_3d()
	# Angle between camera's -basis.z (forward direction) and direction to camera
	var angle = vec3_to_vec2(global_transform.basis.z).angle_to(vec3_to_vec2(global_position - camera.global_position)) + PI
	var chosen_index = 0
	for i in rotations.keys():
		if abs(angle-i) < abs(angle-chosen_index):
			chosen_index = i
	texture = rotations[chosen_index]

@export_tool_button("Generate entries") var generator = entry_generator
@export var rotation_count : float = 8

func entry_generator():
	rotations.clear()
	for i in range(rotation_count+1):
		rotations[TAU/rotation_count*i] = Texture2D.new()

func vec3_to_vec2(vector : Vector3) -> Vector2:
	return Vector2(vector.z,vector.x).normalized()