G - Physics
09
G
375/12
G09G 5/00 (2006.01) G06F 3/033 (2006.01)
Patent
CA 2012406
A graphics system in accordance with the present invention comprises a display, a pointing device for designating a point on a screen of said display, and a storage apparatus. The system further comprises means for selecting a line existing on the screen and a point thereon in response to the designation of a point on the screen by said pointing device, means for generating geometric data of boundary lines of plural angle regions on the screen, whose reference line is supposed to be the selected line and whose reference point is supposed to be the selected point thereon, means for determining the boundary line which is closest to a newly designated point on the basis of said geometric data of the boundary lines, determining the point thereon which is closest to the designated point, generating the geometric data of the determined point, and displaying the segment which starts at said reference point and ends at said determined point as an input candidate each time a new point is designated by said pointing device, means for determining that segment displayed as an input candidate is the segment to be finally input, and means for storing the geometric data of the end point of the segment determined by said means (d) into said storage apparatus.
International Business Machines Corporation
Kerr Alexander
LandOfFree
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