the restricted distance kernel on SO(3), -sqrt(8) sin(acos(t)), cut at the degree N: negative, a distance between orientations that makes points repel each other

Syntax

psi = SO3RestrictedDistanceKernel()

Description

This negative kernel measures separation between orientations and is used in point-repulsion objectives. It is not a probability density. Direct evaluation uses the distance formula; N limits the harmonic representation.

Evaluate psi at t=cos(omega/2), the cosine of half the rotation angle. Use psi.halfwidth() for the angular width in radians and psi.bandwidth for the maximum degree of its harmonic representation.

Keywords

keyword default description
N   maximum harmonic degree; the maxSO3Bandwidth preference when omitted

Output

psi SO3RestrictedDistanceKernel

See also

SO3Kernel, calcDensity, calcKernel

Members

bandwidth the degree N the kernel is cut at

MATLAB’s SO3RestrictedDistanceKernel_index

source

Citing this page. This page is part of the documentation of MTEX, a free and open source MATLAB toolbox for analyzing and modeling crystallographic textures. It was written by The MTEX Developers and is published at https://mtex-toolbox.github.io/SO3RestrictedDistanceKernel_index_py.html. If you use MTEX, or reuse text or figures from this page, in your research, please cite

F. Bachmann, R. Hielscher, H. Schaeben: Texture Analysis with MTEX - Free and Open Source Software Toolbox, Solid State Phenomena 160 (2010), 63-68. 10.4028/www.scientific.net/SSP.160.63

BibTeX 
@article{bachmann2010mtex,
  author  = {F. Bachmann and R. Hielscher and H. Schaeben},
  title   = {Texture Analysis with MTEX - Free and Open Source Software Toolbox},
  journal = {Solid State Phenomena},
  volume  = {160},
  pages   = {63-68},
  year    = {2010},
  doi     = {10.4028/www.scientific.net/SSP.160.63},
  url     = {https://doi.org/10.4028/www.scientific.net/SSP.160.63}
}

Other papers describing specific MTEX methods are listed under Publications — please cite the one that best fits your application. The MTEX source code is licensed under the GNU General Public License v2.0; the text and figures of this documentation are licensed under CC BY 4.0, which permits reuse — including by automated systems — provided The MTEX Developers and this page are credited.