.onLoad

This special function is called automatically when the ETRep package is loaded.
It ensures that `rgl` uses the off-screen WebGL device (`useNULL = TRUE`)
on macOS and other headless environments, so that package installation
and examples do not fail with an OpenGL error.

internal

Analysis of elliptical tubes with applications in biological modeling. The package is based on the references: Taheri, M., Pizer, S. M., & Schulz, J. (2024) "The Mean Shape under the Relative Curvature Condition." Journal of Computational and Graphical Statistics <doi:10.1080/10618600.2025.2535600> and arXiv <doi:10.48550/arXiv.2404.01043>. Mohsen Taheri Shalmani (2024) "Shape Statistics via Skeletal Structures", PhD Thesis, University of Stavanger, Norway <doi:10.13140/RG.2.2.34500.23685>. Key features include constructing discrete elliptical tubes, calculating transformations, validating structures under the Relative Curvature Condition (RCC), computing means, and generating simulations. Supports intrinsic and non-intrinsic mean calculations and transformations, size estimation, plotting, and random sample generation based on a reference tube. The intrinsic approach relies on the interior path of the original non-convex space, incorporating the RCC, while the non-intrinsic approach uses a basic robotic arm transformation that disregards the RCC.

Mohsen Taheri

ETRep

Analysis of Elliptical Tubes Under the Relative Curvature
Condition

Mohsen Taheri Shalmani

Jörn Schulz

Stephen M. Pizer

.onLoad function

<dl><dt>libname</dt>
<dd>Character string; the path to the package library.</dd>
<dt>pkgname</dt>
<dd>Character string; the name of the package.
If the user has not already set `options(rgl.useNULL)`, this function sets it
to `TRUE` to suppress the typical warning:
"rgl.init failed, will use the null device".</dd></dl>

Arguments

Package startup hook — .onLoad

<dl>

<dt>libname</dt>
<dd>Character string; the path to the package library.</dd>


<dt>pkgname</dt>
<dd>Character string; the name of the package.
If the user has not already set `options(rgl.useNULL)`, this function sets it
to `TRUE` to suppress the typical warning:
"rgl.init failed, will use the null device".</dd>

</dl>

.onLoad: Package startup hook

Description

Usage

Arguments