godot, raycast

raycast.gd

extends Camera3D

@onready var ray_cast_3d: RayCast3D = $RayCast3D
@export var grid_map: GridMap
@export var turret_manager: Node3D
@export var turret_cost := 100	
@onready var bank := get_tree().get_first_node_in_group("Bank")

# Called every frame. 'delta' is the elapsed time since the previous frame.
func _process(delta: float) -> void:
	var mouse_position: Vector2 = get_viewport().get_mouse_position()
	ray_cast_3d.target_position = project_local_ray_normal(mouse_position) * 100.0
	ray_cast_3d.force_raycast_update()
	if ray_cast_3d.is_colliding():
		if bank.gold >= turret_cost: 
			var collider = ray_cast_3d.get_collider()
			
			if collider is GridMap:
				var collision_point = ray_cast_3d.get_collision_point()
				var cell = grid_map.local_to_map(collision_point)
				Input.set_default_cursor_shape(Input.CURSOR_POINTING_HAND)
				#make sure gride cel isst to item 0
				if Input.is_action_just_pressed("click"):
					if grid_map.get_cell_item(cell) == 0:
						grid_map.set_cell_item(cell, 1)
						var tile_position = grid_map.map_to_local(cell)
						turret_manager.build_turret(tile_position)
						bank.gold -= turret_cost
			else:
				Input.set_default_cursor_shape(Input.CURSOR_ARROW)
		else:
			Input.set_default_cursor_shape(Input.CURSOR_ARROW)
		#printt(ray_cast_3d.get_collider(), ray_cast_3d.get_collision_point())