flipped.triangles.cart: Determine indices of triangles that are flipped

In retistruct: Retinal Reconstruction Program

Determine indices 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 function 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.cart(P, Trt, R)

Arguments

P	Points in Cartesian coordinates
Trt	Triangulation of points
R	Radius of sphere

Value

List containing:

flipped	Indices of in rows of Trt of flipped triangles.
cents	Vectors of centres.
areas	Areas of triangles.

Author(s)

David Sterratt

retistruct documentation built on April 3, 2025, 5:58 p.m.