OPCr

A function that calls OPC iteratively after rotating mesh a selected
number of degrees around the Z-axis following Evans and Jernvall
(2009) Patterns and constraints in carnivoran and rodent dental
complexity and tooth size. J Vert Paleo 29:24A

Surface topography calculations of Dirichlet's normal energy,
relief index, surface slope, and orientation patch count for teeth using scans of
enamel caps.
Importantly, for the relief index and orientation patch count calculations to
work, the scanned tooth files must be oriented with the occlusal plane parallel
to the x and y axes, and perpendicular to the z axis. The files should also be
simplified, and smoothed in some other software prior to uploading into R.

James D. Pampush

molaR

Dental Surface Complexity Measurement Tools

Paul E. Morse

Alexander Q. Vining

Edward Fuselier

OPCr function

<dl><dt>plyFile</dt>
<dd>An object of classes 'mesh3d' and 'shape3d' with
calculated normals</dd>
<dt>steps</dt>
<dd>Number of iterations to run the <code>OPC()</code> function on
the mesh</dd>
<dt>stepSize</dt>
<dd>Amount of rotation (in degrees) about the Z-axis
to adjust mesh surface by between each iteration of <code>OPC()</code></dd>
<dt>minimum_faces</dt>
<dd>Argument to pass to the <code>OPC()</code> function</dd>
<dt>minimum_area</dt>
<dd>Argument to pass to the <code>OPC()</code> function</dd></dl>

Arguments

Calculate average orientation patch count after several rotations — OPCr

<dl>

<dt>plyFile</dt>
<dd>An object of classes 'mesh3d' and 'shape3d' with
calculated normals</dd>


<dt>steps</dt>
<dd>Number of iterations to run the <code>OPC()</code> function on
the mesh</dd>


<dt>stepSize</dt>
<dd>Amount of rotation (in degrees) about the Z-axis
to adjust mesh surface by between each iteration of <code>OPC()</code></dd>


<dt>minimum_faces</dt>
<dd>Argument to pass to the <code>OPC()</code> function</dd>


<dt>minimum_area</dt>
<dd>Argument to pass to the <code>OPC()</code> function</dd>

</dl>

OPCr: Calculate average orientation patch count after several rotations

Description

Usage

Arguments

Details