Abstract: In a virtual three-dimensional space, at least multiple player characters and a movable special object exist. The multiple player characters move in the virtual three-dimensional space according to operations of each player. The special object can be moved in the virtual three-dimensional space according to operations of each player character. An image, which is perspective-transformed in a state that a visual axis of a virtual camera is directed to the direction of the special object, is displayed as a game screen. An area, which is within a predetermined distance from the special object, is fixed as a safety zone. Hit points of the player characters, which are within the safety zone, do not decrease. However, hit points of the player characters, which are outside the safety zone, decrease.

Abstract: An improved surface shading method computes and stores light reflectance values as a texture map for a given light direction and view direction to an object in a scene during development of a computer graphics (CG) program, and uses the stored texture map later for shading during real-time rendering. A selected bidirectional reflectance distribution function (BRDF) is applied using a standard model for distribution of normal direction vectors for a given type of surface, and BRDF values are computed as a global texture map for the object's surface in the scene. The BRDF values are stored as a look-up table indexed to the sampled range of normal direction vectors. During real-time rendering, surface shading can be readily processed by using the normal direction vector for any given point to look up the stored BRDF value. Shading with BRDF light reflectance values can be combined in one or more passes with shading of other surface texture characteristics, e.g.

Abstract: Progression of a game executed at a mobile terminal is changed in response to the radiowave reception intensity of radio signals received by the mobile terminal. During the course of the progression of a game, enemy characters to combat, items to be generated, and the branching of the game scenario are controlled in accordance with the received signal intensity.