flipped.triangles

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.

Reconstructs retinae by morphing a flat surface with cuts
(a dissected flat-mount retina) onto a curvilinear surface (the
standard retinal shape). It can estimate the position of a point
on the intact adult retina to within 8 degrees of arc (3.6% of
nasotemporal axis). The coordinates in reconstructed retinae can
be transformed to visuotopic coordinates. For more details see
Sterratt, D. C., Lyngholm, D., Willshaw, D. J. and Thompson, I. D.
(2013) <doi:10.1371/journal.pcbi.1002921>.

David Sterratt

retistruct

Retinal Reconstruction Program

Daniel Lyngholm

Jan Okul

flipped.triangles function

<dl><dt>Ps</dt>
<dd>N-by-2 matrix with columns containing latitudes
(<code>phi</code>) and longitudes (<code>lambda</code>) of N points</dd>
<dt>Trt</dt>
<dd>Triangulation of points</dd>
<dt>R</dt>
<dd>Radius of sphere</dd></dl>

Arguments

Author

Determine indices of triangles that are flipped — flipped.triangles

<dl>

<dt>Ps</dt>
<dd>N-by-2 matrix with columns containing latitudes
(<code>phi</code>) and longitudes (<code>lambda</code>) of N points</dd>


<dt>Trt</dt>
<dd>Triangulation of points</dd>


<dt>R</dt>
<dd>Radius of sphere</dd>

</dl>

flipped.triangles: Determine indices of triangles that are flipped

Description

Usage

Value

Arguments

Author