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Manual Reference Pages  - ellipse (3)

NAME

ellipse(3f) - [M_drawplus] draws an ellipse or elliptical arc. (LICENSE:MIT)

CONTENTS

Synopsis
Description
Options
Author
License

SYNOPSIS

subroutine ellipse (XPAGE,YPAGE,RMAJ,RMIN,ANGLE,THO,THF,IPEN)

DESCRIPTION

ellipse(3f) is a FORTRAN subroutine which draws an ellipse or elliptical arc.

OPTIONS

XPAGE,YPAGE
  are the coordinates, in inches, of the starting point of the ellipse or arc.
RMAJ,RMIN
  are the lengths, in inches, of the semimajor and semiminor axes, respectively.
ANGLE is the angle of the major axis, in degrees.
THO,THF
  are the angles, in degrees with respect to ANGLE, of the arc’s starting and ending points.
IPEN is the code that moves the pen to the arc’s starting point. If the value of IPEN is:
                  3, the pen is up for the move;
                  2, the pen is down for the move.

    COMMENTS

THO and THF may be positive or negative. If THO is less than THF, the arc is drawn in a counterclockwise direction; if THO is greater than THF, the arc is drawn in a clockwise direction.

AUTHOR

John S. Urban

LICENSE

MIT License


ellipse (3) March 11, 2021
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