egg.polygon.area: Polygon area

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

Description

Iteratively find the area of a polygon on the surface of the egg

Usage

egg.polygon.area(egg, vertices, N = 6)

Arguments

egg	an object of class egg.fit
vertices	points describing the vertices of the polygon in spherical coordinates, as obtained from egg.coords
N	number of triangle subdivisions

Value

The area of the polygon in pixels^2

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)
vertices = egg.coords(fit, type = "polygon", pch = 16, lwd = 3, col = "green")

# Determine the area of the polygon region
egg.polygon.area(fit, vertices, N = 6)

## End(Not run)

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