EP 0229694 A3 19901122 - VECTOR GRAPHICS GENERATOR SET-UP
Title (en)
VECTOR GRAPHICS GENERATOR SET-UP
Publication
Application
Priority
US 82076386 A 19860117
Abstract (en)
[origin: EP0229694A2] Setting up a graphics vector generator computing values representative of difference functions between delta Y values and delta X values for a vector to be drawn; storing such functions; storing a sign of the difference functions for controlling X, Y, swap and multiplex operations; swapping X values and Y values in response to the stored sign to present a larger of an X function or a Y function to a control means for controlling a number of iterations in generation of a vector; and using an iteration counter to control the number of iterations performed in generation of a vector.
[origin: EP0229694A2] The vector generator includes apparatus for setting up the generator and computes values representative of difference functions between Delta Y values and Delta X values for a vector to be drawn. The computer values are stored and a sign for each of the difference functions is stored for controlling XY swap and multiplex operations. A swap unit swaps X values and Y values in response to the store sign to present a larger of an X function or a Y function to a controller for controlling a number of iterations in generation of a vector. An iteration counter controls a number of iterations in generation of a vector.
IPC 1-7
IPC 8 full level
G06T 11/20 (2006.01); G09G 5/20 (2006.01)
CPC (source: EP)
G09G 5/20 (2013.01)
Citation (search report)
- [A] US 4272808 A 19810609 - HARTWIG WILLIAM F
- [A] IBM TECHNICAL DISCLOSURE BULLETIN, vol. 20, no. 9, February 1978, pages 3703-3706, New York, US; R.J. LLEWELYN et al.: "Generation of points using Bresenham's algorithm"
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
EP 0229694 A2 19870722; EP 0229694 A3 19901122; EP 0229694 B1 19930707; CA 1263775 A 19891205; DE 3786408 D1 19930812; DE 3786408 T2 19940120; JP S62165280 A 19870721
DOCDB simple family (application)
EP 87300126 A 19870108; CA 523772 A 19861125; DE 3786408 T 19870108; JP 27310786 A 19861118