Game machine, game machine control method, and information...

Computer graphics processing and selective visual display system – Computer graphics processing – Three-dimension

Reexamination Certificate

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Reexamination Certificate

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08054309

ABSTRACT:
To provide a game machine for displaying a picture in which light from a light source causes the shadow of an object, and the shadow varies according to a change in the position of the light source, the shape (posture) of the object, and so forth, while reducing a processing load. The present invention relates to a game machine for showing a picture obtained by viewing, from a predetermined viewpoint, a virtual three dimensional space where a light source and an object are placed. According to the present invention, a shadow rendering object for rendering a shadow of the object is placed. The permeability of each of the vertexes of polygons forming the shadow rendering object is determined based on the position of the light source and the position and shape data of the object, and the game screen image is produced based on the permeability determined. The number of polygons forming the shadow rendering object is controlled based on the distance between the viewpoint and the object.

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patent: 2003/0032483 (2003-02-01), Mifune et al.
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Jonathan Blow, Unified Rendering Level of Detail, Part 2, Jan. 16, 2004, pp. 1-4.
Stephen White (Naughty Dog), The Technology of Jak & Daxter, 2003, XP001543361, pp. 1-33.
Naga K. Govindaraju, et al., Ineractive Shadow Generation in Complex Environments, XP-002512686, pp. 1-10.
Japanese Office Action issued in Japanese Application No. 2006-018105 dated May 31, 2011.
Chinese Office Action dated Mar. 15, 2011, corresponding to Chinese Patent Application No. 200680051897.4.

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