C Library Functions - 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
| Nemo Release 3.1 | ellipse (3) | February 23, 2025 |
