anglesArc {alphahull}R Documentation

Angles of the extremes of an arc

Description

Given a vector v and an angle theta, anglesArc returns the angles that A_theta v and A_{-theta} v form with the axis OX, where A_theta v represents the clockwise rotation of angle theta of the vector v.

Usage

anglesArc(v, theta)

Arguments

v Vector v in the plane.
theta Angle theta (in radians).

Details

The angle that forms the vector v with the axis OX takes its value in [0,2π).

Value

angs Numeric vector with two components.

Examples

# Let v=c(0,1) and theta=pi/4
# Consider the arc such that v is the internal angle bisector that 
# divides the angle 2*theta into two equal angles
# The angles that the arc forms with the OX axis are pi/4 and 3*pi/4
v<-c(0,1)
theta<-pi/4
anglesArc(v,theta)

[Package alphahull version 0.1 Index]