G-C Dental Industrial Corp.

Kabushiki Kaisha Square Enix

Koji Ohno

Nobukazu Ohi

Satoshi Tosaki

Hiroshi Kamohara

Yoshiyuki Miyagawa

Syohei Hayashi

A simple model for an object to be processed is obtained, and Z-values and display coordinates of vertexes of the simple model from a predetermined viewpoint are calculated. A rectangular Z-area associated with the calculated display coordinates is detected, and an area of a predetermined size is generated based upon the detected Z-area while keeping a feature of the detected Z-area. A minimum value Z1MIN of the simple model is extracted. The minimum value Z1MIN of the simple model is compared with all of the Z-values within the generated area, which are stored in a Z-buffer at that time. If it is determined that the minimum value Z1MIN of the simple model is larger than the maximum value Z2MAX within the generated area, subsequent steps are skipped. Thus, processing of a real model can be avoided, which reduces the processing.

Video game processing method, video game processing apparatus and computer readable recording medium storing video game program

When a player instructs a movement of a player character from an input device, a control section obtains a position of the player character during a current frame period. The control section obtains a distance between the position of the player character during the current period and a position of a view point of a virtual camera during a previous frame period. If the obtained distance is less than a predetermined critical near distance, the control section moves the position of the view point away from the player character. If the obtained distance exceeds a critical far distance, the control section moves the position of the view point towards the player character. If the obtained distance is in the range between the critical near distance and the critical far distance, the control section does not move the position of the view point.

Character display method in three-dimensional video game

A gypsum composition for denture investment comprises 100 parts by weight of a mixture of 50-90 parts by weight of .alpha.-Gypsum hemihydrate (.alpha.-CaSO.sub.4.1/2H.sub.2 O) with 10-50 parts by weight of .beta.-Gypsum hemihydrate (.beta.-CaSO.sub.4.1/2H.sub.2 O) and 0.2-2.0 parts by weight of a soluble potassium salt and 0.5-3.0 parts by weight of mannitol. As the soluble potassium salt, use may be made of one or more of potassium sulfate, potassium chloride and potassium tartrate. The gypsum composition may further include 0.5-5.0 parts by weight of dihydrate gypsum.

Gypsum composition for denture investment

A method for strengthening dental restorative material is disclosed, which comprises depositing one or more inorganic salts of metals selected from rubidium, cesium, and potassium on the surface of a coated material of a dental restorative material obtained by coating and firing a dental porcelain fused to metal material. The dental restorative material is containing leucite and sodium on the surface of a dental alloy substrate, and heat treating the coated material at temperatures of 380.degree. C. or higher but lower than the melting point of the inorganic salt and the strain temperature of the coated material. According to the method of this invention, the coated material can be strengthened with ease while maintaining its translucency and color tone, without using any special device.

Method for strengthening dental restorative material

A method for strengthened porcelain tooth is disclosed, which comprises depositing one or more inorganic salts of metals selected from rubidium, cesium, and potassium on the surface of a porcelain tooth obtained by sintering a dental porcelain material containing feldspar as a main raw material and sodium, and heat treating the porcelain tooth at temperature of 380.degree. C. or higher but lower than the melting point of the inorganic salt and the strain temperature of the porcelain tooth. According to the method of this invention, the porcelain tooth can be strengthened with ease while maintaining translucency and color tone as in a natural tooth, without using any special device.

Method for strengthening porcelain tooth

A gypsum composition for denture investment consists of 100 parts by weight of a mixture of 50-90 parts by weight of .alpha.-Gypsum hemihydrate (.alpha.-CaSO.sub.4.1/2H.sub.2 O) with 10-50 parts by weight of .beta.-Gypsum hemihydrate (.beta.-CaSO.sub.4.1/2H.sub.2 O) and 0.2-2.0 parts by weight of a soluble potassium salt. As the soluble potassium salt, use may be made of one or more of potassium sulfate, potassium chloride and potassium tartrate. The gypsum composition may further include 0.5-5.0 parts by weight of dihydrate gypsum.

Growing community of inventors

Tokyo, Japan

Koji Ohno