Program and apparatus for displaying graphical objects

A program and apparatus which draw and display images of graphical objects, enabling their smooth and continuous transition from visible state to invisible state. For each given object, its distance from the current eye point is calculated for comparison with a predetermined semi-transparent distanc...

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Bibliographic Details
Main Authors Sato, Fujio, Kamata, Seiichi, Hirayama, Yukio, Imaizumi, Keisuke
Format Patent
LanguageEnglish
Published 19.12.2002
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Summary:A program and apparatus which draw and display images of graphical objects, enabling their smooth and continuous transition from visible state to invisible state. For each given object, its distance from the current eye point is calculated for comparison with a predetermined semi-transparent distance, as well as with a predetermined invisible distance which is longer than the semi-transparent distance. The object is selected as a visible object that is to be subjected to image drawing operations if the above comparison has revealed that the calculated distance is shorter than the invisible distance. An image of the visible object is drawn in opaque mode if the distance is shorter than the semi-transparent distance, or in semi-transparent mode if the distance is longer than the semi-transparent distance. The resultant image is then displayed on a monitor screen.