plarc.c File Reference

#include "plplotP.h"

Go to the source code of this file.

Macros
#define	CIRCLE_SEGMENTS   ( PL_MAXPOLY - 1 )
#define	DEG_TO_RAD(x)   ( ( x ) * M_PI / 180.0 )

Functions
void	plarc_approx (PLFLT x, PLFLT y, PLFLT a, PLFLT b, PLFLT angle1, PLFLT angle2, PLFLT rotate, PLBOOL fill)
void	c_plarc (PLFLT x, PLFLT y, PLFLT a, PLFLT b, PLFLT angle1, PLFLT angle2, PLFLT rotate, PLBOOL fill)

Detailed Description

Functions for drawing an arc.

Definition in file plarc.c.

Macro Definition Documentation

#define CIRCLE_SEGMENTS   ( PL_MAXPOLY - 1 )

Definition at line 28 of file plarc.c.

#define DEG_TO_RAD

(

x

)

( ( x ) * M_PI / 180.0 )

Definition at line 29 of file plarc.c.

Function Documentation

void c_plarc	(	PLFLT	x,
		PLFLT	y,
		PLFLT	a,
		PLFLT	b,
		PLFLT	angle1,
		PLFLT	angle2,
		PLFLT	rotate,
		PLBOOL	fill
	)

Plot an Arc. Takes the following arguments:

x, y: x and y coordinates for the center of the arc

a, b: Radius of the arc's major and minor axes

angle1: Start angle (degrees)

angle2: End angle (degrees)

fill: Should the arc be filled

Parameters

x	Center coordinate of the arc in x.
y	Center coordinate of the arc in y.
a	Radius of the arcs major axis.
b	Radius of the arcs minor axis.
angle1	Start angle in degrees.
angle2	End angle in degrees.
rotate	How much to rotate the arc?
fill	Fill the arc.

Definition at line 141 of file plarc.c.

void plarc_approx	(	PLFLT	x,
		PLFLT	y,
		PLFLT	a,
		PLFLT	b,
		PLFLT	angle1,
		PLFLT	angle2,
		PLFLT	rotate,
		PLBOOL	fill
	)

Takes the same arguments, with the same units, as c_plarc below. This is the fallback function in the event that the output device does not have native support for drawing arcs.

Parameters

x	Center coordinate of the arc in x.
y	Center coordinate of the arc in y.
a	Radius of the arcs major axis.
b	Radius of the arcs minor axis.
angle1	Start angle in degrees.
angle2	End angle in degrees.
rotate	How much to rotate the arc?
fill	Fill the arc.

Definition at line 51 of file plarc.c.