# Read 2 or 3 numbers and return them as a `Vec3`
	#
	# If there is no third value, `Vec3::z` is set to 0.0.
	protected fun read_vec3: Vec3
	do
		var vec = new Vec3
		vec.x = read_number
		vec.y = read_number # Make optional

		var wstr = read_token
		if wstr.length > 0 then
			vec.z = if wstr.is_numeric then wstr.to_f else 0.0
		else
			vec.z = 0.0
		end

		return vec
	end