Patent ID: 7495665
Filing Date: 2009-02-24
Classification: A63F

Abstract:
1. A storage medium having stored thereon a game program to be executed by a computer of a game apparatus which is operated according to an input signal from an input device based on an operation of a player and which displays on a display screen a game image representing at least a portion of a virtual space including a game field of a curved surface in which at least a player object exists and moves about the game field, wherein the game program causes the computer to execute: a plane position coordinate storage step of storing, in a memory, plane position coordinates indicating a position of the player object in a coordinate system of a plane game field; a coordinate update step of updating the plane position coordinates in the plane game field stored in the memory, based on an action which is performed by the player object on the plane game field and is determined according to the input signal, wherein the updated plane position coordinates indicate a position of the player object in the coordinate system of the plane game field; a first coordinate conversion step of performing a coordinate conversion for converting the updated plane position coordinates in the coordinate system based on the plane game field into curved surface position coordinates of the position of the player object in a coordinate system based on the game field of the curved surface; and a display control step of positioning the player object on the game field of the curved surface, based on the curved surface position coordinates, and displaying the player object on the display screen.