Package gaiasky.data.octreegen.generator

Class OctreeGeneratorMag

java.lang.Object

gaiasky.data.octreegen.generator.OctreeGeneratorMag

All Implemented Interfaces:

IOctreeGenerator

public class OctreeGeneratorMag
extends Object
implements IOctreeGenerator

Implements a f: mag -> level bijective map, where octree nodes in a level are filled with magnitude-sorted stars until one of them is saturated before proceeding to lower levels. This uses more memory than the outdated OctreeGeneratorPart but it generally produces an artifact-free octree. The technique is called MS-LOD.

Field Summary

Fields inherited from interface gaiasky.data.octreegen.generator.IOctreeGenerator

logger

Constructor Summary

Constructors

Constructor	Description
OctreeGeneratorMag(OctreeGeneratorParams params)

Method Summary

Modifier and Type	Method	Description
OctreeNode	generateOctree(List<IParticleRecord> catalog)
int	getDiscarded()
Long	getPositionOctantId(double x, double y, double z, int level)	Gets the id of the node which corresponds to the given xyz position

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

OctreeGeneratorMag

public OctreeGeneratorMag(OctreeGeneratorParams params)

Method Details

generateOctree

public OctreeNode generateOctree(List<IParticleRecord> catalog)

Specified by:

generateOctree in interface IOctreeGenerator

getDiscarded

public int getDiscarded()

Specified by:

getDiscarded in interface IOctreeGenerator

getPositionOctantId

public Long getPositionOctantId(double x,
 double y,
 double z,
 int level)

Gets the id of the node which corresponds to the given xyz position

Parameters:

x - Position in x

y - Position in y

z - Position in z

level - Level

Returns:

Id of node which contains the position. The id is a long where the two least significant digits indicate the level and the rest of digit positions indicate the index in the level of the position.