JPS6488790A - Straight line drawing system - Google Patents
Straight line drawing systemInfo
- Publication number
- JPS6488790A JPS6488790A JP24436387A JP24436387A JPS6488790A JP S6488790 A JPS6488790 A JP S6488790A JP 24436387 A JP24436387 A JP 24436387A JP 24436387 A JP24436387 A JP 24436387A JP S6488790 A JPS6488790 A JP S6488790A
- Authority
- JP
- Japan
- Prior art keywords
- straight line
- bits
- line drawing
- speed
- cycle
- 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.)
- Pending
Links
Landscapes
- Image Generation (AREA)
Abstract
PURPOSE:To draw a straight line at high speed by performing linear coordinate generation at the cycle of a T with a DDA (straight line generator), when the memory cycle of a frame memory is at N.T (N=2<n>, an (n) is the number of low-order bits). CONSTITUTION:At the last 1T of the cycle N.T, a true value is set without fail at a bit position corresponding to the linear coordinates for the N point generated between the period of the N.T from a straight line generator 13 out of the respective bit positions of holding means 16 and 17. Consequently, by using the held data of the holding means 16 and 17, the straight line drawing for the N point to for a 2<n>X2<m> bit area in the frame memory indicated by the residual bits excluding the low-order (n) bits and (m) bits of X and Y coordinates generated by the straight line generator 13 can be performed in a lump. Thus, a straight line drawing speed does not suppressed by the speed of the low frame memory, and the straight line drawing can be performed at high speed, which is the original speed of the DDA 13.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP24436387A JPS6488790A (en) | 1987-09-30 | 1987-09-30 | Straight line drawing system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP24436387A JPS6488790A (en) | 1987-09-30 | 1987-09-30 | Straight line drawing system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6488790A true JPS6488790A (en) | 1989-04-03 |
Family
ID=17117578
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP24436387A Pending JPS6488790A (en) | 1987-09-30 | 1987-09-30 | Straight line drawing system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6488790A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8503354B2 (en) | 2006-11-07 | 2013-08-06 | Nokia Corporation | Control signaling techniques for wireless networks |
-
1987
- 1987-09-30 JP JP24436387A patent/JPS6488790A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8503354B2 (en) | 2006-11-07 | 2013-08-06 | Nokia Corporation | Control signaling techniques for wireless networks |
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