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:
Mar. 04, 1997
Filed:
Sep. 09, 1992
Ichiro Harashima, Hitachi, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
In order to display a three-dimensional curve on a two-dimensional display device, a stereographic shape or a tube is generated on the basis of the feature quantity of the curve, and it is displayed on the two-dimensional display screen of the display device instead of the curve or together with the curve. The diameter of the tube is proportional to the radii of curvature of the curve at the individual points of the curve. Lines or stripes corresponding to the torsion of the curve can also be displayed on the side surface of the tube. With this construction, the three-dimensional curve can be grasped stereographically by the use of the conventional two-dimensional display device without preparing any special device for stereoscopic vision. Thus, the capability of expressing the shape of a curved surface which is generated on the basis of such a three-dimensional curve is enhanced in a curve input operation which is the initial stage of a shape design in mechanical CAD or CG.