Abstract:
A color image viewed from a virtual camera is generated. Next, a fog image is generated by adding a fog color to respective objects in accordance with distances from a position, which is represented by a Z value, of a player object to positions of the respective objects which are represented by Z values. Further, mask processing is performed so as to add to the fog image a predetermined fog color in accordance with distances from a predetermined reference pixel to pixels in a lateral and a longitudinal directions in the fog image. And an image into which the fog image and the color image have been synthesized is displayed as a game image.
Abstract:
To provide a wavelength tunable laser device having a wavelength variable range of a broad band, and capable of simply changing the output wavelength. Excitation means 1 excites a laser medium 2a in a main resonator 2. The main resonator 2 is provided with two resonator mirrors 2b and an optical input/output port 2c in addition to the laser medium 2a. By the excitation means 1 and the main resonator 2, laser oscillation can be produced. A sub-resonator 3 is provided with wavelength selection means 3a and optical feedback means 3b. And, the sub-resonater selects a desired wavelength of the laser beam outputted from said main resonator and returns the laser beam of the desired wavelength back to said laser medium. In a device comprising the excitation means 1, the main resonator 2 and the sub-resonator 3, an optical output port 4 is provided. Since this wavelength tunable laser device has no necessity of providing wavelength selection means within the main resonator, laser oscillation is easily produced. Accordingly, even in the case where the gain of the laser medium is small, or the excitation energy is small, oscillation can be produced. In addition, since the main resonator can be placed in an oscillating state at all times, the wavelength tunable laser device can be prevented from being stopped.
Abstract:
A plastic article, in particular a highly crystalline plastic, can be effectively coated with a paint by using a primer composition comprising (A) a polyurethane, (B) a spiro-ortho-ester resin being capable of the ring-opening expansion, (C) a cellulose derivative and (D) a surfactant having a hydroxy group.