Class PropertiesComputer

java.lang.Object

org.apache.commons.math3.geometry.spherical.twod.PropertiesComputer

All Implemented Interfaces:

BSPTreeVisitor<Sphere2D>

class PropertiesComputer
extends Object
implements BSPTreeVisitor<Sphere2D>

Visitor computing geometrical properties.

Since:

3.3

Nested Class Summary

Nested classes/interfaces inherited from interface BSPTreeVisitor

BSPTreeVisitor.Order

Field Summary

Fields

Modifier and Type	Field	Description
private final List<Vector3D>	convexCellsInsidePoints	List of points strictly inside convex cells.
private double	summedArea	Summed area.
private Vector3D	summedBarycenter	Summed barycenter.
private final double	tolerance	Tolerance below which points are consider to be identical.

Constructor Summary

Constructors

Constructor	Description
PropertiesComputer(double tolerance)	Simple constructor.

Method Summary

Modifier and Type	Method	Description
private double	convexCellArea(Vertex start)	Compute convex cell area.
private Vector3D	convexCellBarycenter(Vertex start)	Compute convex cell barycenter.
double	getArea()	Get the area.
S2Point	getBarycenter()	Get the barycenter.
List<Vector3D>	getConvexCellsInsidePoints()	Get the points strictly inside convex cells.
void	visitInternalNode(BSPTree<Sphere2D> node)	Visit a BSP tree node node having a non-null sub-hyperplane.
void	visitLeafNode(BSPTree<Sphere2D> node)	Visit a leaf BSP tree node node having a null sub-hyperplane.
BSPTreeVisitor.Order	visitOrder(BSPTree<Sphere2D> node)	Determine the visit order for this node.

Methods inherited from class Object

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

Field Details

tolerance

private final double tolerance

Tolerance below which points are consider to be identical.

summedArea

private double summedArea

Summed area.

summedBarycenter

private Vector3D summedBarycenter

Summed barycenter.

convexCellsInsidePoints

private final List<Vector3D> convexCellsInsidePoints

List of points strictly inside convex cells.

Constructor Details

PropertiesComputer

PropertiesComputer(double tolerance)

Simple constructor.

Parameters:

tolerance - below which points are consider to be identical

Method Details

visitOrder

public BSPTreeVisitor.Order visitOrder(BSPTree<Sphere2D> node)

Determine the visit order for this node.

Before attempting to visit an internal node, this method is called to determine the desired ordering of the visit. It is guaranteed that this method will be called before visitInternalNode for a given node, it will be called exactly once for each internal node.

Specified by:

visitOrder in interface BSPTreeVisitor<Sphere2D>

Parameters:

node - BSP node guaranteed to have a non null cut sub-hyperplane

Returns:

desired visit order, must be one of BSPTreeVisitor.Order.PLUS_MINUS_SUB, BSPTreeVisitor.Order.PLUS_SUB_MINUS, BSPTreeVisitor.Order.MINUS_PLUS_SUB, BSPTreeVisitor.Order.MINUS_SUB_PLUS, BSPTreeVisitor.Order.SUB_PLUS_MINUS, BSPTreeVisitor.Order.SUB_MINUS_PLUS

visitInternalNode

public void visitInternalNode(BSPTree<Sphere2D> node)

Visit a BSP tree node node having a non-null sub-hyperplane.

It is guaranteed that this method will be called after visitOrder has been called for a given node, it wil be called exactly once for each internal node.

Specified by:

visitInternalNode in interface BSPTreeVisitor<Sphere2D>

Parameters:

node - BSP node guaranteed to have a non null cut sub-hyperplane

See Also:

• BSPTreeVisitor.visitLeafNode(BSPTree)

visitLeafNode

public void visitLeafNode(BSPTree<Sphere2D> node)

Visit a leaf BSP tree node node having a null sub-hyperplane.

Specified by:

visitLeafNode in interface BSPTreeVisitor<Sphere2D>

Parameters:

node - leaf BSP node having a null sub-hyperplane

See Also:

• BSPTreeVisitor.visitInternalNode(BSPTree)

convexCellArea

private double convexCellArea(Vertex start)

Compute convex cell area.

Parameters:

start - start vertex of the convex cell boundary

Returns:

area

convexCellBarycenter

private Vector3D convexCellBarycenter(Vertex start)

Compute convex cell barycenter.

Parameters:

start - start vertex of the convex cell boundary

Returns:

barycenter

getArea

public double getArea()

Get the area.

Returns:

area

getBarycenter

public S2Point getBarycenter()

Get the barycenter.

Returns:

barycenter

getConvexCellsInsidePoints

public List<Vector3D> getConvexCellsInsidePoints()

Get the points strictly inside convex cells.

Returns:

points strictly inside convex cells