org.geotools.geometry.iso.topograph2D.index
Class MonotoneChain

java.lang.Object
  extended by org.geotools.geometry.iso.topograph2D.index.MonotoneChain

public class MonotoneChain
extends java.lang.Object

MonotoneChains are a way of partitioning the segments of an edge to allow for fast searching of intersections. They have the following properties:

  1. the segments within a monotone chain will never intersect each other
  2. the envelope of any contiguous subset of the segments in a monotone chain is simply the envelope of the endpoints of the subset.
Property 1 means that there is no need to test pairs of segments from within the same monotone chain for intersection. Property 2 allows binary search to be used to find the intersection points of two monotone chains. For many types of real-world data, these properties eliminate a large number of segment comparisons, producing substantial speed gains.


Constructor Summary
MonotoneChain(MonotoneChainEdge mce, int chainIndex)
           
 
Method Summary
 void computeIntersections(MonotoneChain mc, SegmentIntersector si)
           
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

MonotoneChain

public MonotoneChain(MonotoneChainEdge mce,
                     int chainIndex)
Method Detail

computeIntersections

public void computeIntersections(MonotoneChain mc,
                                 SegmentIntersector si)


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