JPS6414679A - Graphic method and apparatus for drawing closed quadratic curve point to point basis - Google Patents

Graphic method and apparatus for drawing closed quadratic curve point to point basis

Info

Publication number
JPS6414679A
JPS6414679A JP6555488A JP6555488A JPS6414679A JP S6414679 A JPS6414679 A JP S6414679A JP 6555488 A JP6555488 A JP 6555488A JP 6555488 A JP6555488 A JP 6555488A JP S6414679 A JPS6414679 A JP S6414679A
Authority
JP
Japan
Prior art keywords
octant
curve
point
drawn
new
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
Application number
JP6555488A
Other languages
Japanese (ja)
Inventor
Buutoo Furederitsuku
Shiyoobu Jieraaru
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.)
Texas Instruments Inc
Original Assignee
Texas Instruments Inc
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 Texas Instruments Inc filed Critical Texas Instruments Inc
Publication of JPS6414679A publication Critical patent/JPS6414679A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/20—Function-generator circuits, e.g. circle generators line or curve smoothing circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Image Generation (AREA)

Abstract

PURPOSE: To draw a completely closed quadratic curve with a continuous shifting single cursor by plotting a circle by a mode advancing continuously from an octant to a next octant and returning to the original place again. CONSTITUTION: The arc of a curve is drawn by repeating point-to-point correspondence plotting in a first octant by using the reference of a relative coordinate. Further, as the origin of the curve drawn in a second octant, the last point drawn in the first octant is adopted. The new U and V references of relative coordinate of the second octant as the function of the tangent drawn on the curve at this new origin and the direction of the displacement on the curve. By including the value of the last point drawn in the first octant in a register, the initial value related to this new U and Y reference for the picture in this second octant is calculated. The arc of the curve in the second octant is drawn by repeating point-to-point correspondence plotting by using the new reference of the relative coordinate. The work determining the reference of the relative coordinate and drawing in all the octants covered by the arc of the curve is restarted.
JP6555488A 1987-03-18 1988-03-18 Graphic method and apparatus for drawing closed quadratic curve point to point basis Pending JPS6414679A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8703753A FR2612664B1 (en) 1987-03-18 1987-03-18 METHOD OF POINT-TO-POINT GRAPHIC TRACING OF A CLOSED CURVE OF THE SECOND DEGREE AND DEVICE FOR IMPLEMENTING IT

Publications (1)

Publication Number Publication Date
JPS6414679A true JPS6414679A (en) 1989-01-18

Family

ID=9349155

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6555488A Pending JPS6414679A (en) 1987-03-18 1988-03-18 Graphic method and apparatus for drawing closed quadratic curve point to point basis

Country Status (2)

Country Link
JP (1) JPS6414679A (en)
FR (1) FR2612664B1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2646257B1 (en) * 1989-04-24 1991-08-23 Digital Equipment Int METHOD FOR DISPLAYING ARCS OF POLYNOMIAL PARAMETRIC CURVES ON A DISPLAY MEDIUM OF A DISPLAY MEANS CONNECTED TO A COMPUTER

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5764778A (en) * 1980-10-06 1982-04-20 Ibm Circular-arc display unit
JPS6232519A (en) * 1985-08-06 1987-02-12 Shinko Electric Co Ltd Optimum route searching method in moving robot system

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59149541A (en) * 1983-01-28 1984-08-27 Toshiba Corp Setting system of information on processing conditions

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5764778A (en) * 1980-10-06 1982-04-20 Ibm Circular-arc display unit
JPS6232519A (en) * 1985-08-06 1987-02-12 Shinko Electric Co Ltd Optimum route searching method in moving robot system

Also Published As

Publication number Publication date
FR2612664B1 (en) 1989-07-13
FR2612664A1 (en) 1988-09-23

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