JPS6476373A - Graphic display device - Google Patents
Graphic display deviceInfo
- 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
Links
Landscapes
- 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.
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)
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 |
-
1987
- 1987-09-18 JP JP62234462A patent/JP2747822B2/en not_active Expired - Fee Related
Cited By (4)
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 |