org.apache.commons.math3.geometry.euclidean.oned

## Class OrientedPoint

- java.lang.Object
- - org.apache.commons.math3.geometry.euclidean.oned.OrientedPoint

All Implemented Interfaces:
  Hyperplane<Euclidean1D>

    public class OrientedPoint
    extends Object
    implements Hyperplane<Euclidean1D>

This class represents a 1D oriented hyperplane.

An hyperplane in 1D is a simple point, its orientation being a boolean.

Instances of this class are guaranteed to be immutable.

Since:
  3.0
Version:
  $Id: OrientedPoint.java 1416643 2012-12-03 19:37:14Z tn $

### Field Summary

Fields
`private boolean` `direct` Orientation.
`private Vector1D` `location` Vector location.

### Constructor Summary

Constructors
Constructor and Description
`OrientedPoint(Vector1D location, boolean direct)` Simple constructor.

### Method Summary

Methods
`OrientedPoint` `copySelf()` Copy the instance.
`Vector1D` `getLocation()` Get the hyperplane location on the real line.
`double` `getOffset(Vector<Euclidean1D> point)` Get the offset (oriented distance) of a point.
`boolean` `isDirect()` Check if the hyperplane orientation is direct.
`void` `revertSelf()` Revert the instance.
`boolean` `sameOrientationAs(Hyperplane<Euclidean1D> other)` Check if the instance has the same orientation as another hyperplane.
`SubOrientedPoint` `wholeHyperplane()` Build a region covering the whole hyperplane.
`IntervalsSet` `wholeSpace()` Build a region covering the whole space.

### Methods inherited from class java.lang.Object

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

### Field Detail

#### location

    private Vector1D location

Vector location.

#### direct

    private boolean direct

Orientation.

### Constructor Detail

#### OrientedPoint

    public OrientedPoint(Vector1D location,
                 boolean direct)

Simple constructor.

Parameters:
  `location` - location of the hyperplane
  `direct` - if true, the plus side of the hyperplane is towards abscissas greater than `location`

### Method Detail

#### copySelf

    public OrientedPoint copySelf()

Copy the instance.

Since instances are immutable, this method directly returns the instance.

Specified by:
  `copySelf` in interface `Hyperplane<Euclidean1D>`
Returns:
  the instance itself

#### getOffset

    public double getOffset(Vector<Euclidean1D> point)

Get the offset (oriented distance) of a point.

The offset is 0 if the point is on the underlying hyperplane, it is positive if the point is on one particular side of the hyperplane, and it is negative if the point is on the other side, according to the hyperplane natural orientation.

Specified by:
  `getOffset` in interface `Hyperplane<Euclidean1D>`
Parameters:
  `point` - point to check
Returns:
  offset of the point

#### wholeHyperplane

    public SubOrientedPoint wholeHyperplane()

Build a region covering the whole hyperplane.

Since this class represent zero dimension spaces which does not have lower dimension sub-spaces, this method returns a dummy implementation of a `SubHyperplane`. This implementation is only used to allow the `SubHyperplane` class implementation to work properly, it should not be used otherwise.

Specified by:
  `wholeHyperplane` in interface `Hyperplane<Euclidean1D>`
Returns:
  a dummy sub hyperplane

#### wholeSpace

    public IntervalsSet wholeSpace()

Build a region covering the whole space.

Specified by:
  `wholeSpace` in interface `Hyperplane<Euclidean1D>`
Returns:
  a region containing the instance (really an `IntervalsSet` instance)

#### sameOrientationAs

    public boolean sameOrientationAs(Hyperplane<Euclidean1D> other)

Check if the instance has the same orientation as another hyperplane.

This method is expected to be called on parallel hyperplanes. The method should not re-check for parallelism, only for orientation, typically by testing something like the sign of the dot-products of normals.

Specified by:
  `sameOrientationAs` in interface `Hyperplane<Euclidean1D>`
Parameters:
  `other` - other hyperplane to check against the instance
Returns:
  true if the instance and the other hyperplane have the same orientation

#### getLocation

    public Vector1D getLocation()

Get the hyperplane location on the real line.

Returns:
  the hyperplane location

#### isDirect

    public boolean isDirect()

Check if the hyperplane orientation is direct.

Returns:
  true if the plus side of the hyperplane is towards abscissae greater than hyperplane location

#### revertSelf

    public void revertSelf()

Revert the instance.