Class Miniball
- java.lang.Object
-
- moa.cluster.Miniball
-
public class Miniball extends Object
Java Porting of the Miniball.h code of Bernd Gaertner. Look at http://www.inf.ethz.ch/personal/gaertner/miniball.html
and related work at http://www.inf.ethz.ch/personal/gaertner/texts/own_work/esa99_final.pdf
for reading about the algorithm and the implementation of it.If interested in Bounding Sphere algorithms read also published work of Emo Welzl "Smallest enclosing disks (balls and Ellipsoid)" and the work of Jack Ritter on "Efficient Bounding Spheres" at
http://tog.acm.org/GraphicsGems/gems/BoundSphere.c?searchterm=calcFor Licencing Info report to Bernd Gaertner's one reported below:
Copright (C) 1999-2006, Bernd Gaertner
$Revision: 1.3 $
$Date: 2006/11/16 08:01:52 $
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA,
or download the License terms from prep.ai.mit.edu/pub/gnu/COPYING-2.0.
Contact:
--------
Bernd Gaertner
Institute of Theoretical Computer Science
ETH Zuerich
CAB G32.2
CH-8092 Zuerich, Switzerland
http://www.inf.ethz.ch/personal/gaertner
Original Java port from Paolo Perissinotto for Jpatch Project by Sascha Ledinsky found at http://forum.jpatch.com/viewtopic.php?f=3&t=919- Version:
- 1.0 Date: 2007/11/18 21:57 used for moa for calculating most compact sphere cluster modified by Timm Jansen (moa@cs.rwth-aachen.de) to be used with high dimensional points
- Author:
- Paolo Perissinotto for Jpatch Project by Sascha Ledinsky
-
-
Constructor Summary
Constructors Constructor Description Miniball(int dim)
-
Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description void
build()
Recalculate Miniball parameter Center and Radiusdouble[]
center()
Return the center of the Miniballvoid
check_in(double[] p)
Adds a point to the list.
Skip action on null parameter.void
clear()
Method clear: clears the ArrayList of the selection points.
Use it for starting a new selection list to calculate Bounding Sphere on
or to clear memory references to the list of objects.
Always use at the end of a Miniball use if you want to reuse later the Miniball objectint
nr_points()
Return the actual number of points in the listint
nr_support_points()
Return the number of support points (used to calculate the miniball).
It's and internal infodouble
radius()
Return the Radius of the miniballdouble
squared_radius()
Return the sqaured Radius of the miniball
-
-
-
Method Detail
-
clear
public void clear()
Method clear: clears the ArrayList of the selection points.
Use it for starting a new selection list to calculate Bounding Sphere on
or to clear memory references to the list of objects.
Always use at the end of a Miniball use if you want to reuse later the Miniball object
-
check_in
public void check_in(double[] p)
Adds a point to the list.
Skip action on null parameter.- Parameters:
p
- The object to be added to the list
-
build
public void build()
Recalculate Miniball parameter Center and Radius
-
center
public double[] center()
Return the center of the Miniball- Returns:
- The center (double[])
-
squared_radius
public double squared_radius()
Return the sqaured Radius of the miniball- Returns:
- The square radius
-
radius
public double radius()
Return the Radius of the miniball- Returns:
- The radius
-
nr_points
public int nr_points()
Return the actual number of points in the list- Returns:
- the actual number of points
-
nr_support_points
public int nr_support_points()
Return the number of support points (used to calculate the miniball).
It's and internal info- Returns:
- the number of support points
-
-