Game system, game execution apparatus, and portable storage medium

Abstract

To provide a game system in which game software produced for use in stationary game machines can be used in portable game machines. The game system includes a stationary game machine, a portable game machine, and a memory card which is connectable to both the stationary game machine and the portable game machine. Image data contained in game software produced for the stationary game machine shows an image in the form of free-form surface. The stationary game machine converts this image data to show the image in the form of polygon according to processing performance of the portable game machine, and stores the converted image data and a game program executable by the portable game machine onto the memory card. The portable game machine executes the game program stored on the memory card, and generates a display image from the image data stored on the memory card and displays it.

Description

TECHNICAL FIELD [0001] The present invention relates to techniques of processing a computer game that is executed in accordance with a computer program describing a procedure of the game. BACKGROUND ART [0002] With the progress of computer technology in recent years, both stationary game machines that have high processing power and portable game machines that are small enough to carry are developed and introduced on the market. [0003] Usually, a stationary game machine and a portable game machine use different types of storage media. For instance, the stationary game machine uses game software stored on an optical disc or the like, whereas the portable game machine uses game software stored on a dedicated cartridge or the like. This being so, the optical disc storing the game software for the stationary game machine cannot be inserted into the portable game machine, and the dedicated cartridge storing the game software for the portable game machine cannot be inserted into the statio...

AI Technical Summary

Benefits of technology

[0030] According to this construction, the lower-limit curvature and the upper-limit polygon side length corresponding to the display capacity are set in the conversion table in advance. This makes it unnecessary for the first game execution apparatus to calculate these threshold values, which contributes to simple processing and circuit construction.

[0031] Here, if the second image data generated by the conversion unit exceeds the available memory size shown by the available memory information, the setting unit may increase the lower-limit curvature and the upper-limit polygon side length.

[0032] Accordin

Problems solved by technology

This being so, the optical disc storing the game software for the stationary game machine cannot be inserted into the portable game machine, and the dedicated cartridge storing the game software for the portable game machine cannot be inserted into the stationary game m

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