pgirmess (version 1.6.9)

polycirc2: Computes the polygon coordinates of a circle sector

Description

Computes the polygon coordinates of a circle sector

Usage

polycirc2(radius = 1, center = c(0, 0), edges = 50, init = pi/2, angle = pi/2)

Arguments

radius

the circle radius

center

the centre coordinates (defaut to x=0, y=0)

edges

the circular outline of the sector is approximated by a polygon with this many edges

init

number (in radian) specifying the starting angle

angle

number (in radian) specifying the sector angle

Value

A matrix of coordinates

Details

The matrix of coordinates obtained is intended to be passed to the function polygon

See Also

polygon,polycirc, floating.pie

Examples

# NOT RUN {
plot(c(-1,+1),c(-1,+1),type="n",asp=1)
polygon(polycirc2(),col="red")
polygon(polycirc2(init=pi,angle=pi/4),col="green")
polygon(polycirc2(init=1.5*pi,angle=pi/4),col="violet")
polygon(polycirc2(radius=0.5,center=c(0.5,1)),col="blue")

polycirc2(init=pi,angle=pi/4)
# }

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