Heron {INLAspacetime}

Internal util functions for polygon properties.

Description

This computes the area of a triangle given its three coordinates.

Usage

Heron(x, y)

Area(x, y)

s2trArea(tr, R = 1)

flatArea(tr)

Stiffness(tr)

Arguments

x, y

coordinate vectors.

tr

the triangle coordinates

R

the radius of the spherical domain

Details

Function used internally to compute the area of a triangle.

Value

the area of a 2d triangle

the area of a 2d polygon

the area of a triangle in S2

the area of a triangle

the stiffness matrix for a triangle

Warning

Internal functions, not exported.