Title:
【発明の名称】グラフィックにおける楕円充填方法
Document Type and Number:
Japanese Patent JP2977155
Kind Code:
B2
Abstract:
An ellipse filling graphics method in which the interior of an ellipse is filled with a single color by writing color data to memory positions designated by addresses corresponding to pixels in the ellipse, comprises the steps of (a) selecting a rectangle which is included in the ellipse, (b) writing color data to memory positions designated by addresses corresponding to pixels inside the selected rectangle, and (c) writing color data to memory positions designated by addresses corresponding to pixels inside the ellipse but outside the selected rectangle. The filling method requires 2({square root over (a2+L +b2+L )}-a) fewer line drawing operations to fill an ellipse, and about 0.8r fewer line drawing operations to fill a circle, compared to a conventional method.
Inventors:
KYO WASHAKU
SEI SHOKI
SEI SHOKI
Application Number:
JP14608698A
Publication Date:
November 10, 1999
Filing Date:
May 27, 1998
Export Citation:
Assignee:
SANSEI DENSHI KK
International Classes:
G06T11/40; (IPC1-7): G06T11/40
Domestic Patent References:
| JP683971A | ||||
| JP6272078A | ||||
| JP59206884A | ||||
| JP6461882A | ||||
| JP60103484A | ||||
| JP5258070A |
Attorney, Agent or Firm:
Tadahiko Ito (1 outside)