tool
extends Sprite

export(bool) var editor_clouds_playing = false
export(float, 0.0, 24.0) var day_time_hours = 12.0 setget set_day_time_hours

export(NodePath) var directional_light_node_path

func _ready():
	if !Engine.is_editor_hint():
		editor_clouds_playing = true

var iTime = 0.0
var iFrame = 0


func _process( delta ):
	
	iTime+=delta
	iFrame+=1
	
	if (Engine.is_editor_hint() and self.editor_clouds_playing) or !Engine.is_editor_hint():
		self.material.set("shader_param/iTime", iTime)
		self.material.set("shader_param/iFrame", iFrame)

#    self.set_day_time_hours( self.day_time_hours + delta )
#    if day_time_hours >= 24:
#        self.set_day_time_hours( 0 )


func cov_scb(value):
	self.material.set("shader_param/COVERAGE",float(value))

func thick_scb(value):
	self.material.set("shader_param/THICKNESS",value)

func absb_scb(value):
	self.material.set("shader_param/ABSORPTION",float(value))
	
func step_scb(value):
	self.material.set("shader_param/STEPS",value)


export var sun_position = Vector3(0.0, 1.0, 0.0) setget set_sun_position, get_sun_position
func set_sun_position(new_position):
	sun_position = new_position
	if self.material:
		self.material.set_shader_param("sun_pos", sun_position)
#		_trigger_update_sky()
func get_sun_position():
	return sun_position
	
func set_time_of_day(hours, directional_light, horizontal_angle = 0.0):
	var new_position = Vector3(0.0, -100.0, 0.0)
	new_position = new_position.rotated(Vector3(1.0, 0.0, 0.0), hours * PI / 12.0)
	new_position = new_position.rotated(Vector3(0.0, 1.0, 0.0), horizontal_angle)
	
	if directional_light:
		var t = directional_light.transform
		t.origin = new_position
		directional_light.transform = t.looking_at(Vector3(0.0, 0.0, 0.0), Vector3(0.0, 1.0, 0.0))
		directional_light.light_energy = 1.0 - clamp(abs(hours - 12.0) / 6.0, 0.0, 1.0)
	
	# and update our sky
	set_sun_position(new_position)


func set_day_time_hours(hours):
	if directional_light_node_path:
		set_time_of_day(hours, get_node(directional_light_node_path), 25.0)
	day_time_hours = hours