JPS6476373A - Graphic display device - Google Patents

Graphic display device

Info

Publication number
JPS6476373A
JPS6476373A JP62234462A JP23446287A JPS6476373A JP S6476373 A JPS6476373 A JP S6476373A JP 62234462 A JP62234462 A JP 62234462A JP 23446287 A JP23446287 A JP 23446287A JP S6476373 A JPS6476373 A JP S6476373A
Authority
JP
Japan
Prior art keywords
buffer
pattern
value
coincidence
display device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP62234462A
Other languages
Japanese (ja)
Other versions
JP2747822B2 (en
Inventor
Yasuo Kumakura
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP62234462A priority Critical patent/JP2747822B2/en
Publication of JPS6476373A publication Critical patent/JPS6476373A/en
Application granted granted Critical
Publication of JP2747822B2 publication Critical patent/JP2747822B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Image Generation (AREA)

Abstract

PURPOSE:To always ensure a complete drawing job with no misdrawing at all by delivering selectively the Z value of a Z buffer when the coincidence is obtained between the output of a register which designates a pattern drawing surface and the output of a buffer storing the information on said drawing surface and then delivering the Z value directly from a drawing device in case said coincidence is not obtained. CONSTITUTION:A Z buffer 3 stores the Z coordinates of a pattern whose hidden surface is erased in response to the X and Y coordinates among those 3-dimensional coordinates X, Y and Z delivered from a vector drawing device. Containing such buffer 3, a graphic display device draws a pattern on another pattern. This display device includes a plane iD register 11 which designates a surface where a pattern is drawn in a drawing state, a P buffer 12 which stores the information on the surface that is decided by the points corresponding to the X and Y values on a pattern, and a means which selects the Z value of the buffer 3 when the coincidence is obtained between the outputs of the register 11 and the buffer 12 and then selects the Z value delivered from the vector drawing device for output when no said coincidence is obtained. Thus it is possible to avoid the misdrawing caused by the interpolation of each Z value when a pattern is drawn.
JP62234462A 1987-09-18 1987-09-18 Graphic display device Expired - Fee Related JP2747822B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62234462A JP2747822B2 (en) 1987-09-18 1987-09-18 Graphic display device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62234462A JP2747822B2 (en) 1987-09-18 1987-09-18 Graphic display device

Publications (2)

Publication Number Publication Date
JPS6476373A true JPS6476373A (en) 1989-03-22
JP2747822B2 JP2747822B2 (en) 1998-05-06

Family

ID=16971382

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62234462A Expired - Fee Related JP2747822B2 (en) 1987-09-18 1987-09-18 Graphic display device

Country Status (1)

Country Link
JP (1) JP2747822B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5220646A (en) * 1990-04-30 1993-06-15 International Business Machines Corporation Single pass hidden line removal using z-buffers
US5245700A (en) * 1989-11-21 1993-09-14 International Business Machines Corporation Adjustment of z-buffer values for lines on the surface of a polygon
US5283860A (en) * 1990-11-15 1994-02-01 International Business Machines Corporation System and method for displaying trimmed surfaces using bitplane masking
US5630039A (en) * 1989-11-21 1997-05-13 International Business Machines Corporation Tessellating complex in polygons in modeling coordinates

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5245700A (en) * 1989-11-21 1993-09-14 International Business Machines Corporation Adjustment of z-buffer values for lines on the surface of a polygon
US5630039A (en) * 1989-11-21 1997-05-13 International Business Machines Corporation Tessellating complex in polygons in modeling coordinates
US5220646A (en) * 1990-04-30 1993-06-15 International Business Machines Corporation Single pass hidden line removal using z-buffers
US5283860A (en) * 1990-11-15 1994-02-01 International Business Machines Corporation System and method for displaying trimmed surfaces using bitplane masking

Also Published As

Publication number Publication date
JP2747822B2 (en) 1998-05-06

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Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees