According to at least some example embodiments, a computer-readable medium stores computer-executable program instructions that, when executed by a processor, cause the processor to perform operations including, obtaining plane information of a plane by using first distances from a terminal to a plurality of points on the plane; obtaining a normal vector of the plane by using direction information of the terminal measured by a direction sensor and the plane information; determining, based on the normal vector, a parameter of an object to be displayed on the plane; and displaying, on a display of the terminal, the object according to the determined parameter.