egg.geodesic: Estimate the geodesic

In egg: Distances and areas on the surface of an egg

Description

Estimates the geodesic between the two input points

Usage

egg.geodesic(egg, coords, n = 1000, plot = FALSE, return.points = FALSE,
  ...)

Arguments

egg	an object of class egg.fit
coords	the spherical coordinates of two points on the egg surface, as obtained from egg.coords
n	the number of iterative rotations between p and q
plot	logical, whether or not to plot the geodesic in the current plot window
return.points	logical, should a vector of points along the geodesic be returned
...	additional parameters passed to the lines function

Value

The geodesic between two points

Examples

## Not run: 
# Determine egg shape and plot
egg.image(egg)
fit = egg.fit()
egg.plot(fit, lwd = 3, col = "red")

# Interactively select a series of points (at least 3)
points = egg.coords(fit, type = "points", pch = 16, col = "red")

# Determine the geodesic between points 1 and 3
egg.geodesic(fit, points[c(1,3),], n=1000, plot=TRUE, lwd=3, col="red")

## End(Not run)

egg documentation built on May 2, 2019, 5:55 p.m.