flipped.triangles: Determine indicies of triangles that are flipped
Description
In the projection of points onto the sphere, some triangles maybe
flipped, i.e. in the wrong orientation. This functions determines
which triangles are flipped by computing the vector pointing to
the centre of each triangle and comparing this direction to vector
product of two sides of the triangle.Usage
flipped.triangles(phi, lambda, Tt, R)
Arguments
phi
Vector of lattitudes of points
lambda
Vector of longitudes of points
Tt
Triangulation of points
Value
- List containing:
flippedIndicies of in rows of Tt of flipped triangles.centsVectors of centres.areasAreas of triangles.