The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 21, 1992
Filed:
Jul. 14, 1989
Koei Obata, Kusatsu, JP;
Takashige Kai, Kusatsu, JP;
Daikin Industries, Inc., Osaka, JP;
Abstract
Discrimination of the condition of polygons is carried out by performing coordinate transformation from a view reference coordinate to a light source coordinate for each polygon. Then shadowing is carried out for every pixel of the polygon which is to be partially shaded. Also when multiple light sources exist, detection of the polygon is carried out by performing a coordinate transformation to each light source coordinate system for each polygon to be subjected to a shadowing operation. The detection includes detecting whether or not each polygon is the most light source side from among several polygons, thereafter intensity for display of each pixel is obtained based upon every detection result corresponding to each light source coordinate system.