org.apache.commons.math3.geometry.euclidean.threed
Class SubLine

java.lang.Object
  extended by org.apache.commons.math3.geometry.euclidean.threed.SubLine

public class SubLine
extends Object

This class represents a subset of a Line.

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

Constructor Summary
SubLine(Line line, IntervalsSet remainingRegion)
          Simple constructor.
SubLine(Segment segment)
          Create a sub-line from a segment.
SubLine(Vector3D start, Vector3D end)
          Create a sub-line from two endpoints.
 
Method Summary
 List<Segment> getSegments()
          Get the endpoints of the sub-line.
 Vector3D intersection(SubLine subLine, boolean includeEndPoints)
          Get the intersection of the instance and another sub-line.
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

SubLine

public SubLine(Line line,
               IntervalsSet remainingRegion)
Simple constructor.

Parameters:
line - underlying line
remainingRegion - remaining region of the line

SubLine

public SubLine(Vector3D start,
               Vector3D end)
        throws MathIllegalArgumentException
Create a sub-line from two endpoints.

Parameters:
start - start point
end - end point
Throws:
MathIllegalArgumentException - if the points are equal

SubLine

public SubLine(Segment segment)
        throws MathIllegalArgumentException
Create a sub-line from a segment.

Parameters:
segment - single segment forming the sub-line
Throws:
MathIllegalArgumentException - if the segment endpoints are equal
Method Detail

getSegments

public List<Segment> getSegments()
Get the endpoints of the sub-line.

A subline may be any arbitrary number of disjoints segments, so the endpoints are provided as a list of endpoint pairs. Each element of the list represents one segment, and each segment contains a start point at index 0 and an end point at index 1. If the sub-line is unbounded in the negative infinity direction, the start point of the first segment will have infinite coordinates. If the sub-line is unbounded in the positive infinity direction, the end point of the last segment will have infinite coordinates. So a sub-line covering the whole line will contain just one row and both elements of this row will have infinite coordinates. If the sub-line is empty, the returned list will contain 0 segments.

Returns:
list of segments endpoints

intersection

public Vector3D intersection(SubLine subLine,
                             boolean includeEndPoints)
Get the intersection of the instance and another sub-line.

This method is related to the intersection method in the Line class, but in addition to compute the point along infinite lines, it also checks the point lies on both sub-line ranges.

Parameters:
subLine - other sub-line which may intersect instance
includeEndPoints - if true, endpoints are considered to belong to instance (i.e. they are closed sets) and may be returned, otherwise endpoints are considered to not belong to instance (i.e. they are open sets) and intersection occurring on endpoints lead to null being returned
Returns:
the intersection point if there is one, null if the sub-lines don't intersect


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